USRE42761E1 - Storage router and method for providing virtual local storage - Google Patents
Storage router and method for providing virtual local storage Download PDFInfo
- Publication number
- USRE42761E1 USRE42761E1 US12/220,431 US22043108A USRE42761E US RE42761 E1 USRE42761 E1 US RE42761E1 US 22043108 A US22043108 A US 22043108A US RE42761 E USRE42761 E US RE42761E
- Authority
- US
- United States
- Prior art keywords
- storage
- low level
- host
- protocol
- level block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
Definitions
- This invention relates in general to network storage devices, and more particularly to a storage router and method for providing virtual local storage on remote SCSI storage devices to Fibre Channel devices.
- Typical storage transport mediums provide for a relatively small number of devices to be attached over relatively short distances.
- One such transport medium is a Small Computer System Interface (SCSI) protocol, the structure and operation of which is generally well known as is described, for example, in the SCSI-1, SCSI-2 and SCSI-3 specifications.
- High speed serial interconnects provide enhanced capability to attach a large number of high speed devices to a common storage transport medium over large distances.
- One such serial interconnect is Fibre Channel, the structure and operation of which is described, for example, in Fibre Channel Physical and Signaling Interface (FC-PH), ANSI X3.230 Fibre Channel Arbitrated Loop (FC-AL), and ANSI X3.272 Fibre Channel Private Loop Direct Attach (FC-PLDA).
- Local storage typically consists of a disk drive, tape drive, CD-ROM drive or other storage device contained within, or locally connected to the workstation.
- the workstation provides a file system structure, that includes security controls, with access to the local storage device through native low level, block protocols. These protocols map directly to the mechanisms used by the storage device and consist of data requests without security controls.
- Network interconnects typically provide access for a large number of computing devices to data storage on a remote network server.
- the remote network server provides file system structure, access control, and other miscellaneous capabilities that include the network interface. Access to data through the network server is through network protocols that the server must translate into low level requests to the storage device.
- a workstation with access to the server storage must translate its file system protocols into network protocols that are used to communicate with the server. Consequently, from the perspective of a workstation, or other computing device, seeking to access such server data, the access is much slower than access to data on a local storage device.
- a storage router and method for providing virtual local storage on remote SCSI storage devices to Fibre Channel devices are disclosed that provide advantages over conventional network storage devices and methods.
- a storage router and storage network provide virtual local storage on remote SCSI storage devices to Fibre Channel devices.
- a plurality of Fibre Channel devices such as workstations, are connected to a Fibre Channel transport medium, and a plurality of SCSI storage devices are connected to a SCSI bus transport medium.
- the storage router interfaces between the Fibre Channel transport medium and the SCSI bus transport medium.
- the storage router maps between the workstations and the SCSI storage devices and implements access controls for storage space on the SCSI storage devices.
- the storage router then allows access from the workstations to the SCSI storage devices using native low level, block protocol in accordance with the mapping and the access controls.
- virtual local storage on remote SCSI storage devices is provided to Fibre Channel devices.
- a Fibre Channel transport medium and a SCSI bus transport medium are interfaced with.
- a configuration is maintained for SCSI storage devices connected to the SCSI bus transport medium.
- the configuration maps between Fibre Channel devices and the SCSI storage devices and implements access controls for storage space on the SCSI storage devices. Access is then allowed from Fibre Channel initiator devices to SCSI storage devices using native low level, block protocol in accordance with the configuration.
- a technical advantage of the present invention is the ability to centralize local storage for networked workstations without any cost of speed or overhead.
- Each workstation access its virtual local storage as if it work locally connected.
- the centralized storage devices can be located in a significantly remote position even in excess of ten kilometers as defined by Fibre Channel standards.
- Another technical advantage of the present invention is the ability to centrally control and administer storage space for connected users without limiting the speed with which the users can access local data.
- global access to data, backups, virus scanning and redundancy can be more easily accomplished by centrally located storage devices.
- a further technical advantage of the present invention is providing support for SCSI storage devices as local storage for Fibre Channel hosts.
- the present invention helps to provide extended capabilities for Fibre Channel and for management of storage subsystems.
- FIG. 1 is a block diagram of a conventional network that provides storage through a network server
- FIG. 2 is a block diagram of one embodiment of a storage network with a storage router that provides global access and routing;
- FIG. 3 is a block diagram of one embodiment of a storage network with a storage router that provides virtual local storage
- FIG. 4 is a block diagram of one embodiment of the storage router of FIG. 3 ;
- FIG. 5 is a block diagram of one embodiment of data flow within the storage router of FIG. 4 .
- FIG. 1 is a block diagram of a conventional network, indicated generally at 10 , that provides access to storage through a network server.
- network 10 includes a plurality of workstations 12 interconnected with a network server 14 via a network transport medium 16 .
- Each workstation 12 can generally comprise a processor, memory, input/output devices, storage devices and a network adapter as well as other common computer components.
- Network server 14 uses a SCSI bus 18 as a storage transport medium to interconnect with a plurality of storage devices 20 (tape drives, disk drives, etc.).
- network transport medium 16 is an network connection and storage devices 20 comprise hard disk drives, although there are numerous alternate transport mediums and storage devices.
- each workstation 12 has access to its local storage device as well as network access to data on storage devices 20 .
- the access to a local storage device is typically through native low level, block protocols.
- access by a workstation 12 to storage devices 20 requires the participation of network server 14 which implements a file system and transfers data to workstations 12 only through high level file system protocols. Only network server 14 communicates with storage devices 20 via native low level, block protocols. Consequently, the network access by workstations 12 through network server 14 is slow with respect to their access to local storage.
- it can also be a logistical problem to centrally manage and administer local data distributed across an organization, including accomplishing tasks such as backups, virus scanning and redundancy.
- FIG. 2 is a block diagram of one embodiment of a storage network, indicated generally at 30 , with a storage router that provides global access and routing.
- a Fibre Channel high speed serial transport 32 interconnects a plurality of workstations 36 and storage devices 38 .
- a SCSI bus storage transport medium interconnects workstations 40 and storage devices 42 .
- a storage router 44 then serves to interconnect these mediums and provide devices on either medium global, transparent access to devices on the other medium.
- Storage router 44 routes requests from initiator devices on one medium to target devices on the other medium and routes data between the target and the initiator.
- Storage router 44 can allow initiators and targets to be on either side.
- storage router 44 enhances the functionality of Fibre Channel 32 by providing access, for example, to legacy SCSI storage devices on SCSI bus 34 .
- the operation of storage router 44 can be managed by a management station 46 connected to the storage router via a direct serial connection.
- any workstation 36 or workstation 40 can access any storage device 38 or storage device 42 through native low level, block protocols, and vice versa.
- This functionality is enabled by storage router 44 which routes requests and data as a generic transport between Fibre Channel 32 and SCSI bus 34 .
- Storage router 44 uses tables to map devices from one medium to the other and distributes requests and data across Fibre Channel 32 and SCSI bus 34 without any security access controls.
- this extension of the high speed serial interconnect provided by Fibre Channel 32 is beneficial, it is desirable to provide security controls in addition to extended access to storage devices through a native low level, block protocol.
- FIG. 3 is a block diagram of one embodiment of a storage network, indicated generally at 50 , with a storage router that provides virtual local storage. Similar to that of FIG. 2 , storage network 50 includes a Fibre Channel high speed serial interconnect 52 and a SCSI bus 54 bridged by a storage router 56 . Storage router 56 of FIG. 3 provides for a large number of workstations 58 to be interconnected on a common storage transport and to access common storage devices 60 , 62 and 64 through native low level, block protocols.
- storage router 56 has enhanced functionality to implement security controls and routing such that each workstation 58 can have access to a specific subset of the overall data stored in storage devices 60 , 62 and 64 .
- This specific subset of data has the appearance and characteristics of local storage and is referred to herein as virtual local storage.
- Storage router 56 allows the configuration and modification of the storage allocated to each attached workstation 58 through the use of mapping tables or other mapping techniques.
- storage device 60 can be configured to provide global data 65 which can be accessed by all workstations 58 .
- Storage device 62 can be configured to provide partitioned subsets 66 , 68 , 70 and 72 , where each partition is allocated to one of the workstations 58 (workstations A, B, C and D). These subsets 66 , 68 , 70 and 72 can only be accessed by the associated workstation 58 and appear to the associated workstation 58 as local storage accessed using native low level, block protocols.
- storage device 64 can be allocated as storage for the remaining workstation 58 (workstation E).
- Storage router 56 combines access control with routing such that each workstation 58 has controlled access to only the specified partition of storage device 62 which forms virtual local storage for the workstation 58 . This access control allows security control for the specified data partitions.
- Storage router 56 allows this allocation of storage devices 60 , 62 and 64 to be managed by a management station 76 .
- Management station 76 can connect directly to storage router 56 via a direct connection or alternately, can interface with storage router 56 through either Fibre Channel 52 or SCSI bus 54 . In the latter case, management station 76 can be a workstation or other computing device with special rights such that storage router 56 allows access to mapping tables and shows storage devices 60 , 62 and 64 as they exist physically rather than as they have been allocated.
- FIG. 3 extends the concept of a single workstation having locally connected storage devices to a storage network 50 in which workstations 58 are provided virtual local storage in a manner transparent to workstations 58 .
- Storage router 56 provides centralized control of what each workstation 58 sees as its local drive, as well as what data it sees as global data accessible by other workstations 58 . Consequently, the storage space considered by the workstation 58 to be its local storage is actually a partition (i.e., logical storage definition) of a physically remote storage device 60 , 62 or 64 connected through storage router 56 .
- the collective storage provided by storage devices 60 , 62 and 64 can have blocks allocated by programming means within storage router 56 .
- storage router 56 can include routing tables and security controls that define storage allocation for each workstation 58 .
- the advantages provided by implementing virtual local storage in centralized storage devices include the ability to do collective backups and other collective administrative functions more easily. This is accomplished without limiting the performance of workstations 58 because storage access involves native low level, block protocols and does not involve the overhead of high level protocols and file systems required by network servers.
- FIG. 4 is a block diagram of one embodiment of storage router 56 of FIG. 3 .
- Storage router 56 can comprise a Fibre Channel controller 80 that interfaces with Fibre Channel 52 and a SCSI controller 82 that interfaces with SCSI bus 54 .
- a buffer 84 provides memory work space and is connected to both Fibre Channel controller 80 and to SCSI controller 82 .
- a supervisor unit 86 is connected to Fibre Channel controller 80 , SCSI controller 82 and buffer 84 .
- Supervisor unit 86 comprises a microprocessor for controlling operation of storage router 56 and to handle mapping and security access for requests between Fibre Channel 52 and SCSI bus 54 .
- FIG. 5 is a block diagram of one embodiment of data flow within storage router 56 of FIG. 4 .
- data from Fibre Channel 52 is processed by a Fibre Channel (FC) protocol unit 88 and placed in a FIFO queue 90 .
- a direct memory access (DMA) interface 92 then takes data out of FIFO queue 90 and places it in buffer 84 .
- Supervisor unit 86 processes the data in buffer 84 as represented by supervisor processing 93 . This processing involves mapping between Fibre Channel 52 and SCSI bus 54 and applying access controls and routing functions.
- a DMA interface 94 then pulls data from buffer 84 and places it into a buffer 96 .
- a SCSI protocol unit 98 pulls data from buffer 96 and communicates the data on SCSI bus 54 . Data flow in the reverse direction, from SCSI bus 54 to Fibre Channel 52 , is accomplished in a reverse manner.
- the storage router of the present invention is a bridge device that connects a Fibre Channel link directly to a SCSI bus and enables the exchange of SCSI command set information between application clients on SCSI bus devices and the Fibre Channel links. Further, the storage router applies access controls such that virtual local storage can be established in remote SCSI storage devices for workstations on the Fibre Channel link.
- the storage router provides a connection for Fibre Channel links running the SCSI Fibre Channel Protocol (FCP) to legacy SCSI devices attached to a SCSI bus.
- the Fibre Channel topology is typically an Arbitrated Loop (FC_AL).
- the storage router enables a migration path to Fibre Channel based, serial SCSI networks by providing connectivity for legacy SCSI bus devices.
- the storage router can be attached to a Fibre Channel Arbitrated Loop and a SCSI bus to support a number of SCSI devices.
- the storage router can make the SCSI bus devices available on the Fibre Channel network as FCP logical units.
- operation of the storage router is transparent to application clients. In this manner, the storage router can form an integral part of the migration to new Fibre Channel based networks while providing a means to continue using legacy SCSI devices.
- the storage router can be a rack mount or free standing device with an internal power supply.
- the storage router can have a Fibre Channel and SCSI port, and a standard, detachable power cord can be used, the FC connector can be a copper DB9 connector, and the SCSI connector can be a 68-pin type. Additional modular jacks can be provided for a serial port and a 802.3 10BaseT port, i.e. twisted pair Ethernet, for management access.
- the SCSI port of the storage router an support SCSI direct and sequential access target devices and can support SCSI initiators, as well.
- the Fibre Channel port can interface to SCSI-3 FCP enabled devices and initiators.
- one implementation of the storage router uses: a Fibre Channel interface based on the HEWLETT-PACKARD TACHYON HPFC-5000 controller and a GLM media interface; an Intel 80960RP processor, incorporating independent data and program memory spaces, and associated logic required to implement a stand alone processing system; and a serial port for debug and system configuration. Further, this implementation includes a SCSI interface supporting Fast-20 based on the SYMBIOS 53C8xx series SCSI controllers, and an operating system based upon the WIND RIVERS SYSTEMS VXWORKS or IXWORKS kernel, as determined by design. In addition, the storage router includes software as required to control basic functions of the various elements, and to provide appropriate translations between the FC and SCSI protocols.
- the storage router has various modes of operation that are possible between FC and SCSI target and initiator combinations. These modes are: FC Initiator to SCSI Target; SCSI Initiator to FC Target; SCSI Initiator to SCSI Target; and FC Initiator to FC Target.
- the first two modes can be supported concurrently in a single storage router device are discussed briefly below.
- the third mode can involve two storage router devices back to back and can serve primarily as a device to extend the physical distance beyond that possible via a direct SCSI connection.
- the last mode can be used to carry FC protocols encapsulated on other transmission technologies (e.g. ATM, SONET), or to act as a bridge between two FC loops (e.g. as a two port fabric).
- the FC Initiator to SCSI Target mode provides for the basic configuration of a server using Fibre Channel to communicate with SCSI targets.
- This mode requires that a host system have an FC attached device and associated device drivers and software to generate SCSI-3 FCP requests.
- This system acts as an initiator using the storage router to communicate with SCSI target devices.
- the SCSI devices supported can include SCSI-2 compliant direct or sequential access (disk or tape) devices.
- the storage router serves to translate command and status information and transfer data between SCSI-3 FCP and SCSI-2, allowing the use of standard SCSI-2 devices in a Fibre Channel environment.
- the SCSI Initiator to FC Target mode provides for the configuration of a server using SCSI-2 to communicate with Fibre Channel targets. This mode requires that a host system has a SCSI-2 interface and driver software to control SCSI-2 target devices.
- the storage router will connect to the SCSI-2 bus and respond as a target to multiple target IDs. Configuration information is required to identify the target IDs to which the bridge will respond on the SCSI-2 bus.
- the storage router then translates the SCSI-2 requests to SCSI-3 FCP requests, allowing the use of FC devices with a SCSI host system. This will also allow features such as a tape device acting as an initiator on the SCSI bus to provide full support for this type of SCSI device.
- Configuration can be modified, for example, through a serial port or through an Ethernet port via SNMP (simple network management protocol) or a Telnet session.
- SNMP manageability can be provided via an 802.3 Ethernet interface. This can provide for configuration changes as well as providing statistics and error information.
- Configuration can also be performed via TELNET or RS-232 interfaces with menu driven command interfaces. Configuration information can be stored in a segment of flash memory and can be retained across resets and power off cycles. Password protection can also be provided.
- addressing information is needed to map from FC addressing to SCSI addressing and vice versa.
- This can be ‘hard’ configuration data, due to the need for address information to be maintained across initialization and partial reconfigurations of the Fibre Channel address space.
- user configured addresses will be needed for AL_PAs in order to insure that known addresses are provided between loop reconfigurations.
- FCP and SCSI 2 systems employ different methods of addressing target devices.
- the inclusion of a storage router means that a method of translating device IDs needs to be implemented.
- the storage router can respond to commands without passing the commands through to the opposite interface. This can be implemented to allow all generic FCP and SCSI commands to pass through the storage router to address attached devices, but allow for configuration and diagnostics to be performed directly on the storage router through the FC and SCSI interfaces.
- Management commands are those intended to be processed by the storage router controller directly. This may include diagnostic, mode, and log commands as well as other vendor-specific commands. These commands can be received and processed by both the FCP and SCSI interfaces, but are not typically bridged to the opposite interface. These commands may also have side effects on the operation of the storage router, and cause other storage router operations to change or terminate.
- a primary method of addressing management commands though the FCP and SCSI interfaces can be through peripheral device type addressing.
- the storage router can respond to all operations addressed to logical unit (LUN) zero as a controller device.
- Commands that the storage router will support can include INQUIRY as well as vendor-specific management commands. These are to be generally consistent with SCC standard commands.
- the SCSI bus is capable of establishing bus connections between targets. These targets may internally address logical units.
- the prioritized addressing scheme used by SCSI subsystems can be represented as follows: BUS:TARGET:LOGICAL UNIT.
- the BUS identification is intrinsic in the configuration, as a SCSI initiator is attached to only one bus.
- Target addressing is handled by bus arbitration from information provided to the arbitrating device.
- Target addresses are assigned to SCSI devices directly, though some means of configuration, such as a hardware jumper, switch setting, or device specific software configuration. As such, the SCSI protocol provides only logical unit addressing within the Identify message. Bus and target information is implied by the established connection.
- Fibre Channel devices within a fabric are addressed by a unique port identifier.
- This identifier is assigned to a port during certain well-defined states of the FC protocol.
- Individual ports are allowed to arbitrate for a known, user defined address. If such an address is not provided, or if arbitration for a particular user address fails, the port is assigned a unique address by the FC protocol. This address is generally not guaranteed to be unique between instances.
- the FC protocol also provides a logical unit address field within command structures to provide addressing to devices internal to a port.
- the FCP_CMD payload specifies an eight byte LUN field. Subsequent identification of the exchange between devices is provided by the FQXID (Fully Qualified Exchange ID).
- FC ports can be required to have specific addresses assigned. Although basic functionality is not dependent on this, changes in the loop configuration could result in disk targets changing identifiers with the potential risk of data corruption or loss.
- This configuration can be straightforward, and can consist of providing the device a loop-unique ID (AL_PA) in the range of “01h” to “EFh.”
- A_PA loop-unique ID
- Storage routers could be shipped with a default value with the assumption that most configurations will be using single storage routers and no other devices requesting the present ID. This would provide a minimum amount of initial configuration to the system administrator. Alternately, storage routers could be defaulted to assume any address so that configurations requiring multiple storage routers on a loop would not require that the administrator assign a unique ID to the additional storage routers.
- the translation to BUS:TARGET:LUN of the SCSI address information will be direct. That is, the values represented in the FCP LUN field will directly map to the values in effect on the SCSI bus.
- This provides a clean translation and does not require SCSI bus discovery. It also allows devices to be dynamically added to the SCSI bus without modifying the address map. It may not allow for complete discovery by FCP initiator devices, as gaps between device addresses may halt the discovery process. Legacy SCSI device drivers typically halt discovery on a target device at the first unoccupied LUN, and proceed to the next target. This would lead to some devices not being discovered. However, this allows for hot plugged devices and other changes to the loop addressing.
- ordered translation requires that the storage router perform discovery on reset, and collapses the addresses on the SCSI bus to sequential FCP LUN values.
- the FCP LUN values 0 ⁇ N can represent N+1 SCSI devices, regardless of SCSI address values, in the order in which they are isolated during the SCSI discovery process. This would allow the FCP initiator discovery process to identify all mapped SCSI devices without further configuration. This has the limitation that hot-plugged devices will not be identified until the next reset cycle. In this case, the address may also be altered as well.
- the storage router provides configuration and access controls that cause certain requests from FC Initiators to be directed to assigned virtual local storage partitioned on SCSI storage devices. For example, the same request for LUN 0 (local storage) by two different FC Initiators can be directed to two separate subsets of storage.
- the storage router can use tables to map, for each initiator, what storage access is available and what partition is being addressed by a particular request. In this manner, the storage space provided by SCSI storage devices can be allocated to FC initiators to provide virtual local storage as well as to create any other desired configuration for secured access.
Abstract
A storage router (56) and storage network (50) provide virtual local storage on remote SCSI storage devices (60, 62, 64) to Fiber Channel devices. A plurality of Fiber Channel devices, such as workstations (58), are connected to a Fiber Channel transport medium (52), and a plurality of SCSI storage devices (60, 62, 64) are connected to a SCSI bus transport medium (54). The storage router (56) interfaces between the Fiber Channel transport medium (52) and the SCSI bus transport medium (54). The storage router (56) maps between the workstations (58) and the SCSI storage devices (60, 62, 64) and implements access controls for storage space on the SCSI storage devices (60, 62, 64). The storage router (56) then allows access from the workstations (58) to the SCSI storage devices (60, 62, 64) using native low level, block protocol in accordance with the mapping and the access controls.
Description
This application is a continuation of, and claims a benefit of priority under 35 U.S.C. 120 of the filing date of, U.S. patent application Ser. No. 10/658,163 by inventors Geoffrey B. Hoese and Jeffry T. Russell, entitled “Storage Router and Method for Providing Virtual Local Storage” filed on Sep. 9, 2003, now U.S. Pat. No. 7,051,147, which in turn is a continuation of U.S. application Ser. No. 10/081,110 by inventors Geoffrey B. Hoese and Jeffry T. Russell, entitled “Storage Router and Method for Providing Virtual Local Storage” filed on Feb. 22, 2002, now U.S. Pat. No. 6,789,152, which in turn is a continuation of U.S. Application Ser. No. 09/354,682 by inventors Geoffrey B. Hoese and Jeffry T. Russell, entitled “Storage Router and Method for Providing Virtual Local Storage” filed on Jul. 15, 1999, now U.S. Pat. No. 6,421,753, which in turn is a continuation of U.S. patent application Ser. No. 09/001,799, filed on Dec. 31, 1997, now U.S. Pat. No. 5,941,972. All of the above referenced applications and patents are hereby incorporated by reference in their entireties as if they had been fully set forth herein. Each of U.S. patent application Ser. Nos. 10/658,163, 09/354,682, and 09/001,799 are hereby incorporated by reference in their entireties as if they had been fully set forth herein.
This invention relates in general to network storage devices, and more particularly to a storage router and method for providing virtual local storage on remote SCSI storage devices to Fibre Channel devices.
Typical storage transport mediums provide for a relatively small number of devices to be attached over relatively short distances. One such transport medium is a Small Computer System Interface (SCSI) protocol, the structure and operation of which is generally well known as is described, for example, in the SCSI-1, SCSI-2 and SCSI-3 specifications. High speed serial interconnects provide enhanced capability to attach a large number of high speed devices to a common storage transport medium over large distances. One such serial interconnect is Fibre Channel, the structure and operation of which is described, for example, in Fibre Channel Physical and Signaling Interface (FC-PH), ANSI X3.230 Fibre Channel Arbitrated Loop (FC-AL), and ANSI X3.272 Fibre Channel Private Loop Direct Attach (FC-PLDA).
Conventional computing devices, such as computer workstations, generally access storage locally or through network interconnects. Local storage typically consists of a disk drive, tape drive, CD-ROM drive or other storage device contained within, or locally connected to the workstation. The workstation provides a file system structure, that includes security controls, with access to the local storage device through native low level, block protocols. These protocols map directly to the mechanisms used by the storage device and consist of data requests without security controls. Network interconnects typically provide access for a large number of computing devices to data storage on a remote network server. The remote network server provides file system structure, access control, and other miscellaneous capabilities that include the network interface. Access to data through the network server is through network protocols that the server must translate into low level requests to the storage device. A workstation with access to the server storage must translate its file system protocols into network protocols that are used to communicate with the server. Consequently, from the perspective of a workstation, or other computing device, seeking to access such server data, the access is much slower than access to data on a local storage device.
In accordance with the present invention, a storage router and method for providing virtual local storage on remote SCSI storage devices to Fibre Channel devices are disclosed that provide advantages over conventional network storage devices and methods.
According to one aspect of the present invention, a storage router and storage network provide virtual local storage on remote SCSI storage devices to Fibre Channel devices. A plurality of Fibre Channel devices, such as workstations, are connected to a Fibre Channel transport medium, and a plurality of SCSI storage devices are connected to a SCSI bus transport medium. The storage router interfaces between the Fibre Channel transport medium and the SCSI bus transport medium. The storage router maps between the workstations and the SCSI storage devices and implements access controls for storage space on the SCSI storage devices. The storage router then allows access from the workstations to the SCSI storage devices using native low level, block protocol in accordance with the mapping and the access controls.
According to another aspect of the present invention, virtual local storage on remote SCSI storage devices is provided to Fibre Channel devices. A Fibre Channel transport medium and a SCSI bus transport medium are interfaced with. A configuration is maintained for SCSI storage devices connected to the SCSI bus transport medium. The configuration maps between Fibre Channel devices and the SCSI storage devices and implements access controls for storage space on the SCSI storage devices. Access is then allowed from Fibre Channel initiator devices to SCSI storage devices using native low level, block protocol in accordance with the configuration.
A technical advantage of the present invention is the ability to centralize local storage for networked workstations without any cost of speed or overhead. Each workstation access its virtual local storage as if it work locally connected. Further, the centralized storage devices can be located in a significantly remote position even in excess of ten kilometers as defined by Fibre Channel standards.
Another technical advantage of the present invention is the ability to centrally control and administer storage space for connected users without limiting the speed with which the users can access local data. In addition, global access to data, backups, virus scanning and redundancy can be more easily accomplished by centrally located storage devices.
A further technical advantage of the present invention is providing support for SCSI storage devices as local storage for Fibre Channel hosts. In addition, the present invention helps to provide extended capabilities for Fibre Channel and for management of storage subsystems.
A more complete understanding of the present invention and the advantages thereof may be acquired by referring to the following description taken in conjunction with the accompanying drawings, in which like reference numbers indicate like features, and wherein:
In network 10, each workstation 12 has access to its local storage device as well as network access to data on storage devices 20. The access to a local storage device is typically through native low level, block protocols. On the other hand, access by a workstation 12 to storage devices 20 requires the participation of network server 14 which implements a file system and transfers data to workstations 12 only through high level file system protocols. Only network server 14 communicates with storage devices 20 via native low level, block protocols. Consequently, the network access by workstations 12 through network server 14 is slow with respect to their access to local storage. In network 10, it can Also be a logistical problem to centrally manage and administer local data distributed across an organization, including accomplishing tasks such as backups, virus scanning and redundancy.
In storage network 30, any workstation 36 or workstation 40 can access any storage device 38 or storage device 42 through native low level, block protocols, and vice versa. This functionality is enabled by storage router 44 which routes requests and data as a generic transport between Fibre Channel 32 and SCSI bus 34. Storage router 44 uses tables to map devices from one medium to the other and distributes requests and data across Fibre Channel 32 and SCSI bus 34 without any security access controls. Although this extension of the high speed serial interconnect provided by Fibre Channel 32 is beneficial, it is desirable to provide security controls in addition to extended access to storage devices through a native low level, block protocol.
According to the present invention, storage router 56 has enhanced functionality to implement security controls and routing such that each workstation 58 can have access to a specific subset of the overall data stored in storage devices 60, 62 and 64. This specific subset of data has the appearance and characteristics of local storage and is referred to herein as virtual local storage. Storage router 56 allows the configuration and modification of the storage allocated to each attached workstation 58 through the use of mapping tables or other mapping techniques.
As shown in FIG. 3 , for example, storage device 60 can be configured to provide global data 65 which can be accessed by all workstations 58. Storage device 62 can be configured to provide partitioned subsets 66, 68, 70 and 72, where each partition is allocated to one of the workstations 58 (workstations A, B, C and D). These subsets 66, 68, 70 and 72 can only be accessed by the associated workstation 58 and appear to the associated workstation 58 as local storage accessed using native low level, block protocols. Similarly, storage device 64 can be allocated as storage for the remaining workstation 58 (workstation E).
The environment of FIG. 3 extends the concept of a single workstation having locally connected storage devices to a storage network 50 in which workstations 58 are provided virtual local storage in a manner transparent to workstations 58. Storage router 56 provides centralized control of what each workstation 58 sees as its local drive, as well as what data it sees as global data accessible by other workstations 58. Consequently, the storage space considered by the workstation 58 to be its local storage is actually a partition (i.e., logical storage definition) of a physically remote storage device 60, 62 or 64 connected through storage router 56. This means that similar requests from workstations 58 for access to their local storage devices produce different accesses to the storage space on storage devices 60, 62 and 64. Further, no access from a workstation 58 is allowed to the virtual local storage of another workstation 58.
The collective storage provided by storage devices 60, 62 and 64 can have blocks allocated by programming means within storage router 56. To accomplish this function, storage router 56 can include routing tables and security controls that define storage allocation for each workstation 58. The advantages provided by implementing virtual local storage in centralized storage devices include the ability to do collective backups and other collective administrative functions more easily. This is accomplished without limiting the performance of workstations 58 because storage access involves native low level, block protocols and does not involve the overhead of high level protocols and file systems required by network servers.
The storage router of the present invention is a bridge device that connects a Fibre Channel link directly to a SCSI bus and enables the exchange of SCSI command set information between application clients on SCSI bus devices and the Fibre Channel links. Further, the storage router applies access controls such that virtual local storage can be established in remote SCSI storage devices for workstations on the Fibre Channel link. In one embodiment, the storage router provides a connection for Fibre Channel links running the SCSI Fibre Channel Protocol (FCP) to legacy SCSI devices attached to a SCSI bus. The Fibre Channel topology is typically an Arbitrated Loop (FC_AL).
In part, the storage router enables a migration path to Fibre Channel based, serial SCSI networks by providing connectivity for legacy SCSI bus devices. The storage router can be attached to a Fibre Channel Arbitrated Loop and a SCSI bus to support a number of SCSI devices. Using configuration settings, the storage router can make the SCSI bus devices available on the Fibre Channel network as FCP logical units. Once the configuration is defined, operation of the storage router is transparent to application clients. In this manner, the storage router can form an integral part of the migration to new Fibre Channel based networks while providing a means to continue using legacy SCSI devices.
In one implementation (not shown), the storage router can be a rack mount or free standing device with an internal power supply. The storage router can have a Fibre Channel and SCSI port, and a standard, detachable power cord can be used, the FC connector can be a copper DB9 connector, and the SCSI connector can be a 68-pin type. Additional modular jacks can be provided for a serial port and a 802.3 10BaseT port, i.e. twisted pair Ethernet, for management access. The SCSI port of the storage router an support SCSI direct and sequential access target devices and can support SCSI initiators, as well. The Fibre Channel port can interface to SCSI-3 FCP enabled devices and initiators.
To accomplish its functionality, one implementation of the storage router uses: a Fibre Channel interface based on the HEWLETT-PACKARD TACHYON HPFC-5000 controller and a GLM media interface; an Intel 80960RP processor, incorporating independent data and program memory spaces, and associated logic required to implement a stand alone processing system; and a serial port for debug and system configuration. Further, this implementation includes a SCSI interface supporting Fast-20 based on the SYMBIOS 53C8xx series SCSI controllers, and an operating system based upon the WIND RIVERS SYSTEMS VXWORKS or IXWORKS kernel, as determined by design. In addition, the storage router includes software as required to control basic functions of the various elements, and to provide appropriate translations between the FC and SCSI protocols.
The storage router has various modes of operation that are possible between FC and SCSI target and initiator combinations. These modes are: FC Initiator to SCSI Target; SCSI Initiator to FC Target; SCSI Initiator to SCSI Target; and FC Initiator to FC Target. The first two modes can be supported concurrently in a single storage router device are discussed briefly below. The third mode can involve two storage router devices back to back and can serve primarily as a device to extend the physical distance beyond that possible via a direct SCSI connection. The last mode can be used to carry FC protocols encapsulated on other transmission technologies (e.g. ATM, SONET), or to act as a bridge between two FC loops (e.g. as a two port fabric).
The FC Initiator to SCSI Target mode provides for the basic configuration of a server using Fibre Channel to communicate with SCSI targets. This mode requires that a host system have an FC attached device and associated device drivers and software to generate SCSI-3 FCP requests. This system acts as an initiator using the storage router to communicate with SCSI target devices. The SCSI devices supported can include SCSI-2 compliant direct or sequential access (disk or tape) devices. The storage router serves to translate command and status information and transfer data between SCSI-3 FCP and SCSI-2, allowing the use of standard SCSI-2 devices in a Fibre Channel environment.
The SCSI Initiator to FC Target mode provides for the configuration of a server using SCSI-2 to communicate with Fibre Channel targets. This mode requires that a host system has a SCSI-2 interface and driver software to control SCSI-2 target devices. The storage router will connect to the SCSI-2 bus and respond as a target to multiple target IDs. Configuration information is required to identify the target IDs to which the bridge will respond on the SCSI-2 bus. The storage router then translates the SCSI-2 requests to SCSI-3 FCP requests, allowing the use of FC devices with a SCSI host system. This will also allow features such as a tape device acting as an initiator on the SCSI bus to provide full support for this type of SCSI device.
In general, user configuration of the storage router will be needed to support various functional modes of operation. Configuration can be modified, for example, through a serial port or through an Ethernet port via SNMP (simple network management protocol) or a Telnet session. Specifically, SNMP manageability can be provided via an 802.3 Ethernet interface. This can provide for configuration changes as well as providing statistics and error information. Configuration can also be performed via TELNET or RS-232 interfaces with menu driven command interfaces. Configuration information can be stored in a segment of flash memory and can be retained across resets and power off cycles. Password protection can also be provided.
In the first two modes of operation, addressing information is needed to map from FC addressing to SCSI addressing and vice versa. This can be ‘hard’ configuration data, due to the need for address information to be maintained across initialization and partial reconfigurations of the Fibre Channel address space. In an arbitrated loop configuration, user configured addresses will be needed for AL_PAs in order to insure that known addresses are provided between loop reconfigurations.
With respect to addressing, FCP and SCSI 2 systems employ different methods of addressing target devices. Additionally, the inclusion of a storage router means that a method of translating device IDs needs to be implemented. In addition, the storage router can respond to commands without passing the commands through to the opposite interface. This can be implemented to allow all generic FCP and SCSI commands to pass through the storage router to address attached devices, but allow for configuration and diagnostics to be performed directly on the storage router through the FC and SCSI interfaces.
Management commands are those intended to be processed by the storage router controller directly. This may include diagnostic, mode, and log commands as well as other vendor-specific commands. These commands can be received and processed by both the FCP and SCSI interfaces, but are not typically bridged to the opposite interface. These commands may also have side effects on the operation of the storage router, and cause other storage router operations to change or terminate.
A primary method of addressing management commands though the FCP and SCSI interfaces can be through peripheral device type addressing. For example, the storage router can respond to all operations addressed to logical unit (LUN) zero as a controller device. Commands that the storage router will support can include INQUIRY as well as vendor-specific management commands. These are to be generally consistent with SCC standard commands.
The SCSI bus is capable of establishing bus connections between targets. These targets may internally address logical units. Thus, the prioritized addressing scheme used by SCSI subsystems can be represented as follows: BUS:TARGET:LOGICAL UNIT. The BUS identification is intrinsic in the configuration, as a SCSI initiator is attached to only one bus. Target addressing is handled by bus arbitration from information provided to the arbitrating device. Target addresses are assigned to SCSI devices directly, though some means of configuration, such as a hardware jumper, switch setting, or device specific software configuration. As such, the SCSI protocol provides only logical unit addressing within the Identify message. Bus and target information is implied by the established connection.
Fibre Channel devices within a fabric are addressed by a unique port identifier. This identifier is assigned to a port during certain well-defined states of the FC protocol. Individual ports are allowed to arbitrate for a known, user defined address. If such an address is not provided, or if arbitration for a particular user address fails, the port is assigned a unique address by the FC protocol. This address is generally not guaranteed to be unique between instances. Various scenarios exist where the AL-PA of a device will change, either after power cycle or loop reconfiguration.
The FC protocol also provides a logical unit address field within command structures to provide addressing to devices internal to a port. The FCP_CMD payload specifies an eight byte LUN field. Subsequent identification of the exchange between devices is provided by the FQXID (Fully Qualified Exchange ID).
FC ports can be required to have specific addresses assigned. Although basic functionality is not dependent on this, changes in the loop configuration could result in disk targets changing identifiers with the potential risk of data corruption or loss. This configuration can be straightforward, and can consist of providing the device a loop-unique ID (AL_PA) in the range of “01h” to “EFh.” Storage routers could be shipped with a default value with the assumption that most configurations will be using single storage routers and no other devices requesting the present ID. This would provide a minimum amount of initial configuration to the system administrator. Alternately, storage routers could be defaulted to assume any address so that configurations requiring multiple storage routers on a loop would not require that the administrator assign a unique ID to the additional storage routers.
Address translation is needed where commands are issued in the cases FC Initiator to SCSI Target and SCSI Initiator to FC Target. Target responses are qualified by the FQXID and will retain the translation acquired at the beginning of the exchange. This prevents configuration changes occurring during the course of execution of a command from causing data or state information to be inadvertently misdirected. Configuration can be required in cases of SCSI Initiator to FC Target, as discovery may not effectively allow for FCP targets to consistently be found. This is due to an FC arbitrated loop supporting addressing of a larger number of devices than a SCSI bus and the possibility of FC devices changing their AL-PA due to device insertion or other loop initialization.
In the direct method, the translation to BUS:TARGET:LUN of the SCSI address information will be direct. That is, the values represented in the FCP LUN field will directly map to the values in effect on the SCSI bus. This provides a clean translation and does not require SCSI bus discovery. It also allows devices to be dynamically added to the SCSI bus without modifying the address map. It may not allow for complete discovery by FCP initiator devices, as gaps between device addresses may halt the discovery process. Legacy SCSI device drivers typically halt discovery on a target device at the first unoccupied LUN, and proceed to the next target. This would lead to some devices not being discovered. However, this allows for hot plugged devices and other changes to the loop addressing.
In the ordered method, ordered translation requires that the storage router perform discovery on reset, and collapses the addresses on the SCSI bus to sequential FCP LUN values. Thus, the FCP LUN values 0−N can represent N+1 SCSI devices, regardless of SCSI address values, in the order in which they are isolated during the SCSI discovery process. This would allow the FCP initiator discovery process to identify all mapped SCSI devices without further configuration. This has the limitation that hot-plugged devices will not be identified until the next reset cycle. In this case, the address may also be altered as well.
In addition to addressing, according to the present invention, the storage router provides configuration and access controls that cause certain requests from FC Initiators to be directed to assigned virtual local storage partitioned on SCSI storage devices. For example, the same request for LUN 0 (local storage) by two different FC Initiators can be directed to two separate subsets of storage. The storage router can use tables to map, for each initiator, what storage access is available and what partition is being addressed by a particular request. In this manner, the storage space provided by SCSI storage devices can be allocated to FC initiators to provide virtual local storage as well as to create any other desired configuration for secured access.
Although the present invention has been described in detail, it should be understood that various changes, substitutions, and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (89)
1. A storage router for providing virtual local storage on storage devices to a host device, comprising:
a buffer providing memory work space for the storage router;
a first controller operable to connect to and interface with a first transport medium;
a second controller operable to connect to and interface with a second transport medium, wherein the first transport medium is connected to a host device and the second transport medium is connected to the storage devices, and wherein at least one of the first transport medium and the second transport medium is a serial transport medium; and
a supervisor unit coupled to the first and second controllers and the buffer, the supervisor unit operable to:
maintain a map that maps between the host device and at least a portion of the storage devices, the map comprising a representation of the host device and a representation of at least a portion of a first storage device; and
access the map to control access from the host devices connected to the first transport medium to the storage devices to allow the host device to access the at least a portion of the first storage device through native low level block protocol.
2. The storage router of claim 1 , wherein, for a request received from the host device according to a native low level block protocol, the supervisor unit is further operable to:
access the map to determine the appropriate storage space on the at least a portion of the first storage device using a host identification for the host device;
forward the request to the first storage device according to the native low level block protocol.
3. The storage router of claim 1 , wherein the map further maps between the host device and at least a portion of a second storage device.
4. The storage router of claim 3 , wherein the map further maps between at least one other host device and the at least a portion of the second storage device.
5. The storage router of claim 1 , wherein the host device comprises a workstation.
6. The storage router of claim 1 , wherein the storage devices comprise hard disk drives.
7. The storage router of claim 1 , wherein the first controller comprises:
a protocol unit operable to connect to the transport medium;
a first-in-first-out queue coupled to the protocol unit; and
a direct memory access (DMA) interface coupled to the first-in-first-out queue and to the buffer.
8. The storage router of claim 7 , wherein the second controller comprises:
a protocol unit operable to connect to the transport medium;
a first-in-first-out queue coupled to the protocol unit; and
a direct memory access (DMA) interface coupled to the first-in-first-out queue and to the buffer.
9. The storage router of claim 1 , wherein the native low level block protocol is SCSI.
10. The storage router of claim 9 , wherein the SCSI native low level block protocol is encapsulated in a Fibre Channel transport protocol on the first transport medium.
11. The storage router of claim 9 , wherein the SCSI native low level block protocol is encapsulated in a Fibre Channel transport protocol on the second transport medium.
12. The storage router of claim 9 , wherein the SCSI native low level block protocol is encapsulated in an iSCSI transport protocol on the first transport medium.
13. The storage router of claim 9 , wherein the SCSI native low level block protocol is encapsulated in an iSCSI transport protocol on the second transport medium.
14. The storage router of claim 1 , wherein the native low level block protocol is ATA.
15. The storage router of claim 1 , wherein the native low level block protocol is encapsulated in a Fibre Channel transport protocol on the first transport medium.
16. The storage router of claim 1 , wherein the native low level block protocol is encapsulated in an iSCSI transport protocol on the first transport medium.
17. The storage router of claim 1 , wherein the native low level block protocol at the host device is SCSI.
18. The storage router of claim 17 , wherein the native low level block protocol at the storage device is SCSI.
19. The storage router of claim 1 , wherein the supervisor unit further comprises a processor.
20. The storage router of claim 19 , wherein the processor comprises one of an ASIC, microprocessor, CPU, microcontroller or DSP.
21. The storage router of claim 1 , wherein the supervisor unit maintains an allocation of subsets of storage space to associated host devices connected to the first transport medium, wherein each subset is only accessible by the associated host device connected to the first transport medium.
22. The storage router of claim 1 , wherein, for the host device, the map maps from a host identification for the host device to a physical address for the at least a portion of the first storage device.
23. The storage router of claim 1 , wherein, for the host device, the map maps from the host identification for the host device to a virtual address for the at least a portion of the first storage device to a physical address for the at least a portion of the first storage device.
24. The storage router of claim 1 , wherein, for the first host device connected to the first transport medium, the map maps from the first host identification to a virtual address an associated subset of storage to a physical address for the associated subset of storage.
25. The storage router of claim 17 , wherein the native low level block protocol at the storage device is ATA.
26. The storage router of claim 17 , wherein the native low level block protocol at the storage device is SATA.
27. The storage router of claim 17 , wherein the native low level block protocol at the storage device is SAS (Serial Attached SCSI).
28. The storage router of claim 17 , wherein the supervisor unit is further operable to translate the SCSI low level block protocol command from the host device to an ATA low level block protocol command for the at least a portion of the first storage device to allow the host device to access the at least a portion of the first storage device.
29. The storage router of claim 17 , wherein the supervisor unit is further operable to translate the SCSI low level block protocol command from the host device to an SATA low level block protocol command for the at least a portion of the first storage device to allow the host device to access the at least a portion of the first storage device using native low level block protocol.
30. The storage router of claim 17 , wherein the supervisor unit is further operable to allow the host device to access the at least a portion of the first storage device using a SAS low level block protocol at the storage device.
31. The storage router of claim 1 , wherein the native low level block protocol at the host device is SCSI and the SCSI native low level block protocol at the host device is encapsulated in an iSCSI transport protocol to transport the SCSI native low level block protocol to the first controller via the first transport medium.
32. A storage router for providing virtual local storage on storage devices to a host device, comprising:
a buffer providing memory work space for the storage router;
a first controller operable to connect to and interface with a first transport medium;
a second controller operable to connect to and interface with a second transport medium, wherein at least one of the first transport medium and the second transport medium is a serial transport medium; and
a supervisor unit coupled to the first and second controllers and the buffer, the supervisor unit operable to:
maintain a map that comprises host identifications for host devices on the first transport medium and representations of at least a portion of a storage device on the second transport medium, the map associating subsets of storage space on the storage devices connected to the second transport medium with the host devices connected to the first transport medium; and
for a request received from a first host, access the map to determine the storage space associated with a first host using the host identification for the first host to direct the request to the appropriate subset of storage space, wherein the request is received from the first host and forwarded to the storage device containing the storage space using a native low level block protocol format.
33. The storage router of claim 32 , wherein a particular subset of storage space comprises a single storage device, storage on multiple storage devices, a portion of a single storage device or portions of storage on multiple storage devices.
34. The storage router of claim 32 , wherein at least one subset of storage space is associated with multiple devices connected to the first transport medium.
35. The storage router of claim 32 , wherein the map further defines global storage available to any host device on the first transport medium.
36. The storage router of claim 35 , wherein a device on the first transport medium not represented in the map is allowed access to the global storage.
37. The storage router of claim 32 , wherein each subset of storage space is only accessible by devices on the first transport medium associated with that subset of storage space in the map.
38. The storage router of claim 32 , wherein the supervisor unit is further operable to direct requests to a same address from different devices on the first transport medium to different associated subsets of storage based on the map.
39. The storage router of claim 32 , wherein at least one subset of storage is accessible by at least two hosts.
40. The storage router of claim 32 , wherein the devices connected to the first transport medium comprise workstations.
41. The storage router of claim 32 , wherein the storage devices comprise hard disk drives.
42. The storage router of claim 32 , wherein the first controller comprises:
a protocol unit operable to connect to the transport medium;
a first-in-first-out queue coupled to the protocol unit; and
a direct memory access (DMA) interface coupled to the first-in-first-out queue and to the buffer.
43. The storage router of claim 42 , wherein the second controller comprises:
a protocol unit operable to connect to the transport medium;
a first-in-first-out queue coupled to the protocol unit; and
a direct memory access (DMA) interface coupled to the first-in-first-out queue and to the buffer.
44. The storage router of claim 32 , wherein the native low level block protocol is SCSI.
45. The storage router of claim 44 , wherein the SCSI native low level block protocol is encapsulated in a Fibre Channel transport protocol on the first transport medium.
46. The storage router of claim 44 , wherein the SCSI native low level block protocol is encapsulated in a Fibre Channel transport protocol on the second transport medium.
47. The storage router of claim 44 , wherein the SCSI native low level block protocol is encapsulated in an SCSI transport protocol on the first transport medium.
48. The storage router of claim 44 , wherein the SCSI native low level block protocol is encapsulated in an SCSI transport protocol on the second transport medium.
49. The storage router of claim 32 , wherein the native low level block protocol is ATA.
50. The storage router of claim 32 , wherein the native low level block protocol is encapsulated in a Fibre Channel transport protocol on the first transport medium.
51. The storage router of claim 32 , wherein the native low level block protocol is encapsulated in an iSCSI transport protocol on the first transport medium.
52. The storage router of claim 32 , wherein the native low level block protocol at the host device is SCSI.
53. The storage router of claim 52 , wherein the native low level block protocol at the storage device is SCSI.
54. The storage router of claim 32 , wherein the supervisor unit further comprises a processor.
55. The storage router of claim 54 , wherein the processor comprises one of an ASIC, microprocessor, CPU, microcontroller or DSP.
56. The storage router of claim 32 , wherein, for the first host device connected to the first transport medium, the map maps from the first host identification to a physical address corresponding to an associated subset of storage.
57. The storage router of claim 52 , wherein the native low level block protocol at the storage device is ATA.
58. The storage router of claim 52 , wherein the native low level block protocol at the storage device is SATA.
59. The storage router of claim 52 , wherein the native low level block protocol at the storage device is SAS.
60. A method for providing virtual local storage on storage devices connected to a first transport medium to host devices connected to a second transport medium, comprising:
interfacing with a first transport medium;
interfacing with a second transport medium, wherein at least one of the first transport medium and the second transport medium is a serial transport medium; and
maintaining a map that maps between the host devices and the storage devices, the map comprising a representation of at least one host device and a representation of at least a portion of a first storage device; and
controlling access from the host devices to the storage devices using the map; and
accessing the storage devices from the host devices using native low level block protocol.
61. The method of claim 60 , further comprising:
sending a request from a first host device for a particular storage space on the first storage device to a routing device according to a native low level block protocol;
accessing the map to determine whether the first host device may access the particular storage space on the first storage device; and
if the first host device may access the particular storage space on the first storage device, forwarding request to the first storage device according to the native low level block protocol.
62. The method of claim 61 , wherein accessing the map to determine whether the first host device may access the particular storage space on the first storage device further comprises comparing a host identification for the first host device to a host identification in the map.
63. The method of claim 60 , wherein maintaining a map that maps between the host devices and the storage devices, further comprises mapping a representation of a first host device and a representation of a second host device to a representation of at least a portion of a first storage device and a representation of at least a portion of a second storage device.
64. The method of claim 60 , wherein accessing the storage devices from the host devices using native low level block protocol further comprises communicating from the host devices to the storage devices using SCSI as the native low level block protocol.
65. The method of claim 61 , wherein the accessing the storage devices from the host devices using native low level block protocol further comprises creating a SCSI protocol command at the host device, forwarding the SCSI command to the routing device, and forwarding a SCSI command from the routing device to the storage device.
66. The method of claim 65 , further comprising encapsulating the SCSI protocol command from the host device to the routing device in a Fibre Channel transport protocol for transporting on the first transport medium.
67. The method of claim 65 , further comprising encapsulating the SCSI protocol command from the host device to the routing device in an iSCSI transport protocol for transporting on the first transport medium.
68. The method of claim 65 , wherein the SCSI protocol command from the routing device to the storage device is encapsulated in a Fibre Channel transport protocol for transporting on the second transport medium.
69. The method of claim 61 , wherein the accessing the storage devices from the host devices using native low level block protocol further comprises forwarding a SCSI low level block protocol command to the routing device.
70. The method of claim 69 , the accessing the storage devices from the host devices using native low level block protocol further comprises forwarding an ATA low level block protocol command to the storage device.
71. The method of claim 69 , the accessing the storage devices from the host devices using native low level block protocol further comprises forwarding an SATA low level block protocol command to the storage device.
72. The method of claim 69 , the accessing the storage devices from the host devices using native low level block protocol further comprises forwarding a SAS low level block protocol command to the storage device.
73. The method of claim 60 , further comprising encapsulating the native low level block protocol in a Fibre Channel transport protocol for transport on the first transport medium.
74. The method of claim 60 , further comprising encapsulating the native low level block protocol in an iSCSI transport protocol for transport on the first transport medium.
75. The method of claim 70 , further comprising translating the SCSI low level block protocol command from the host device to an ATA low level block protocol command for storage device.
76. The method of claim 71 , further comprising translating the SCSI low level block protocol command from the host device to an SATA low level block protocol command for storage device.
77. The method of claim 60 , wherein maintaining a map that maps between the host devices and the storage devices further comprises maintaining an allocation of subsets of storage space to associated host devices, wherein each subset is only accessible by host devices associated with the subset.
78. The method of claim 60 , wherein maintaining a map that maps between the host devices and the storage devices further comprises further comprises mapping a host identification for each host device to a logical address for each at least a portion of each storage device.
79. A method for providing virtual local storage on storage devices to a host device, wherein the host device is connected to a first transport medium, the storage devices are connected to a second transport medium and at least one of the first and second transport mediums is a serial transport medium, comprising:
maintaining a map comprising host identifiers for each host device representations of at least a portion of each storage device by associating each host identification with zero or more representations of at least a portion of each storage device; and
receiving a request from a first host device for access to a first portion of a storage device;
accessing the map to whether the first host may access the requested portion of the first storage device; and
if the first host may access the requested portion of the first storage device, forwarding the request to the portion of the first storage device using a native low level block protocol.
80. The method of claim 79 , wherein the at least a portion of the first storage device comprises a single storage device, storage on multiple storage devices, a portion of a single storage device or portions of storage on multiple storage devices.
81. The method of claim 79 , wherein receiving a request from a first host device for access to a first portion of a storage device further comprises receiving a request comprising a SCSI request for access.
82. The method of claim 81 , further comprising encapsulating the SCSI request for access in an iSCSI transport protocol and transporting the encapsulated SCSI request from the host device on the first transport medium.
83. The method of claim 82 , wherein the native low level block protocol at the storage device is SCSI.
84. The method of claim 82 , wherein the native low level block protocol at the storage device is SATA.
85. The method of claim 82 , wherein the native low level block protocol at the storage device is ATA.
86. The method of claim 82 , wherein the native low level block protocol at the storage device is SAS.
87. The method of claim 86 , wherein maintaining a map further comprises mapping from the host identification for each host device to a physical address for each at least a portion of each storage device.
88. The method of claim 86 , wherein maintaining a map further comprises mapping from the host identification for each host device to a virtual address for each at least a portion of each storage device.
89. The method of claim 81 , further comprising:
encapsulating the SCSI request for access in a Fibre Channel transport protocol; and
transporting the Fibre Channel encapsulated SCSI request from the host device on the first transport medium.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/220,431 USRE42761E1 (en) | 1997-12-31 | 2008-07-24 | Storage router and method for providing virtual local storage |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/001,799 US5941972A (en) | 1997-12-31 | 1997-12-31 | Storage router and method for providing virtual local storage |
US09/354,682 US6421753B1 (en) | 1997-12-31 | 1999-07-15 | Storage router and method for providing virtual local storage |
US10/081,110 US6789152B2 (en) | 1997-12-31 | 2002-02-22 | Storage router and method for providing virtual local storage |
US10/658,163 US7051147B2 (en) | 1997-12-31 | 2003-09-09 | Storage router and method for providing virtual local storage |
US11/353,826 US7340549B2 (en) | 1997-12-31 | 2006-02-14 | Storage router and method for providing virtual local storage |
US12/220,431 USRE42761E1 (en) | 1997-12-31 | 2008-07-24 | Storage router and method for providing virtual local storage |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/353,826 Reissue US7340549B2 (en) | 1997-12-31 | 2006-02-14 | Storage router and method for providing virtual local storage |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE42761E1 true USRE42761E1 (en) | 2011-09-27 |
Family
ID=27357005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/220,431 Expired - Fee Related USRE42761E1 (en) | 1997-12-31 | 2008-07-24 | Storage router and method for providing virtual local storage |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE42761E1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110106998A1 (en) * | 1997-12-31 | 2011-05-05 | Hoese Geoffrey B | Storage Router and Method for Providing Virtual Local Storage |
US9232000B1 (en) | 2012-12-21 | 2016-01-05 | Emc Corporation | Method and system for balancing load across target endpoints on a server and initiator endpoints accessing the server |
US9237057B1 (en) | 2012-12-21 | 2016-01-12 | Emc Corporation | Reassignment of a virtual connection from a busiest virtual connection or locality domain to a least busy virtual connection or locality domain |
US9270786B1 (en) * | 2012-12-21 | 2016-02-23 | Emc Corporation | System and method for proxying TCP connections over a SCSI-based transport |
US9407601B1 (en) | 2012-12-21 | 2016-08-02 | Emc Corporation | Reliable client transport over fibre channel using a block device access model |
US9473590B1 (en) | 2012-12-21 | 2016-10-18 | Emc Corporation | Client connection establishment over fibre channel using a block device access model |
US9473591B1 (en) | 2012-12-21 | 2016-10-18 | Emc Corporation | Reliable server transport over fibre channel using a block device access model |
US9473589B1 (en) | 2012-12-21 | 2016-10-18 | Emc Corporation | Server communication over fibre channel using a block device access model |
US9509797B1 (en) | 2012-12-21 | 2016-11-29 | Emc Corporation | Client communication over fibre channel using a block device access model |
US9514151B1 (en) | 2012-12-21 | 2016-12-06 | Emc Corporation | System and method for simultaneous shared access to data buffers by two threads, in a connection-oriented data proxy service |
US9531765B1 (en) | 2012-12-21 | 2016-12-27 | Emc Corporation | System and method for maximizing system data cache efficiency in a connection-oriented data proxy service |
US9563423B1 (en) | 2012-12-21 | 2017-02-07 | EMC IP Holding Company LLC | System and method for simultaneous shared access to data buffers by two threads, in a connection-oriented data proxy service |
US9591099B1 (en) | 2012-12-21 | 2017-03-07 | EMC IP Holding Company LLC | Server connection establishment over fibre channel using a block device access model |
US9647905B1 (en) | 2012-12-21 | 2017-05-09 | EMC IP Holding Company LLC | System and method for optimized management of statistics counters, supporting lock-free updates, and queries for any to-the-present time interval |
US9712427B1 (en) | 2012-12-21 | 2017-07-18 | EMC IP Holding Company LLC | Dynamic server-driven path management for a connection-oriented transport using the SCSI block device model |
Citations (228)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3082406A (en) | 1957-08-08 | 1963-03-19 | Ibm | Decoding device |
US4092732A (en) | 1977-05-31 | 1978-05-30 | International Business Machines Corporation | System for recovering data stored in failed memory unit |
US4170415A (en) | 1977-07-15 | 1979-10-09 | The United States Of America As Represented By The Secretary Of The Interior | System for producing orthophotographs |
US4415970A (en) | 1980-11-14 | 1983-11-15 | Sperry Corporation | Cache/disk subsystem with load equalization |
US4455605A (en) | 1981-07-23 | 1984-06-19 | International Business Machines Corporation | Method for establishing variable path group associations and affiliations between "non-static" MP systems and shared devices |
US4504927A (en) | 1982-09-08 | 1985-03-12 | Allen-Bradley Company | Programmable controller with expandable I/O interface circuitry |
US4533996A (en) | 1982-02-23 | 1985-08-06 | International Business Machines Corporation | Peripheral systems accommodation of guest operating systems |
US4573152A (en) | 1983-05-13 | 1986-02-25 | Greene Richard E | Switch matrix test and control system |
US4603380A (en) | 1983-07-01 | 1986-07-29 | International Business Machines Corporation | DASD cache block staging |
US4620295A (en) | 1983-03-07 | 1986-10-28 | International Business Machines Corporation | Method for accessing a data set in a word processing system |
US4644462A (en) | 1982-09-13 | 1987-02-17 | Fujitsu Limited | Input/output interrupt system |
US4695948A (en) | 1985-02-28 | 1987-09-22 | International Business Machines Corporation | Bus to bus converter using a RAM for multiple address mapping |
US4697232A (en) | 1984-11-30 | 1987-09-29 | Storage Technology Corporation | I/O device reconnection in a multiple-CPU, dynamic path allocation environment |
US4715030A (en) | 1986-08-04 | 1987-12-22 | General Electric Company | Local area network bridge |
US4751635A (en) | 1986-04-16 | 1988-06-14 | Bell Communications Research, Inc. | Distributed management support system for software managers |
US4787028A (en) | 1985-09-03 | 1988-11-22 | Ncr Corporation | Multicommunication protocol controller |
US4807180A (en) | 1985-11-20 | 1989-02-21 | Hitachi, Ltd. | Multiple control system for disk storage and method for realizing same |
US4811278A (en) | 1981-10-05 | 1989-03-07 | Bean Robert G | Secondary storage facility employing serial communications between drive and controller |
US4821179A (en) | 1985-08-08 | 1989-04-11 | American Telephone And Telegraph Company | Communication system configuration detection apparatus and method |
US4825406A (en) | 1981-10-05 | 1989-04-25 | Digital Equipment Corporation | Secondary storage facility employing serial communications between drive and controller |
US4827411A (en) | 1987-06-15 | 1989-05-02 | International Business Machines Corporation | Method of maintaining a topology database |
US4835674A (en) | 1986-07-28 | 1989-05-30 | Bull Hn Information Systems Inc. | Computer network system for multiple processing elements |
US4845722A (en) | 1987-10-16 | 1989-07-04 | Digital Equipment Corporation | Computer interconnect coupler employing crossbar switching |
US4864532A (en) | 1987-09-21 | 1989-09-05 | Unisys Corporation | Small computer systems interface--data link processor |
US4897874A (en) | 1988-03-31 | 1990-01-30 | American Telephone And Telegraph Company At&T Bell Laboratories | Metropolitan area network arrangement for serving virtual data networks |
US4947367A (en) | 1988-03-28 | 1990-08-07 | Emc Corporation | System for converting digital data from magnetic tape format apparatus and method for converting a sequentially accessible magnetic tape data format to directly accessible write-once disk data format to worm optical disk format |
US4961224A (en) | 1989-03-06 | 1990-10-02 | Darby Yung | Controlling access to network resources |
WO1991003788A1 (en) | 1989-09-08 | 1991-03-21 | Auspex Systems, Inc. | Parallel i/o network file server architecture |
US5072378A (en) | 1989-12-18 | 1991-12-10 | Storage Technology Corporation | Direct access storage device with independently stored parity |
US5077736A (en) | 1988-06-28 | 1991-12-31 | Storage Technology Corporation | Disk drive memory |
US5077732A (en) | 1988-11-14 | 1991-12-31 | Datapoint Corporation | LAN with dynamically selectable multiple operational capabilities |
US5124987A (en) | 1990-04-16 | 1992-06-23 | Storage Technology Corporation | Logical track write scheduling system for a parallel disk drive array data storage subsystem |
US5155845A (en) | 1990-06-15 | 1992-10-13 | Storage Technology Corporation | Data storage system for providing redundant copies of data on different disk drives |
US5185876A (en) | 1990-03-14 | 1993-02-09 | Micro Technology, Inc. | Buffering system for dynamically providing data to multiple storage elements |
US5193184A (en) | 1990-06-18 | 1993-03-09 | Storage Technology Corporation | Deleted data file space release system for a dynamically mapped virtual data storage subsystem |
US5193168A (en) | 1988-10-31 | 1993-03-09 | International Business Machines Corporation | Multiprocessing system with enhanced shared storage |
US5202856A (en) | 1990-04-05 | 1993-04-13 | Micro Technology, Inc. | Method and apparatus for simultaneous, interleaved access of multiple memories by multiple ports |
US5210866A (en) | 1990-09-12 | 1993-05-11 | Storage Technology Corporation | Incremental disk backup system for a dynamically mapped data storage subsystem |
US5212785A (en) | 1990-04-06 | 1993-05-18 | Micro Technology, Inc. | Apparatus and method for controlling data flow between a computer and memory devices |
US5214778A (en) | 1990-04-06 | 1993-05-25 | Micro Technology, Inc. | Resource management in a multiple resource system |
US5226143A (en) | 1990-03-14 | 1993-07-06 | International Business Machines Corporation | Multiprocessor system includes operating system for notifying only those cache managers who are holders of shared locks on a designated page by global lock manager |
JPH05181609A (en) | 1992-01-06 | 1993-07-23 | Nec Corp | Personal computer system |
US5239643A (en) | 1987-11-30 | 1993-08-24 | International Business Machines Corporation | Method for reducing disk I/O accesses in a multi-processor clustered type data processing system |
US5239654A (en) | 1989-11-17 | 1993-08-24 | Texas Instruments Incorporated | Dual mode SIMD/MIMD processor providing reuse of MIMD instruction memories as data memories when operating in SIMD mode |
US5239632A (en) | 1992-04-16 | 1993-08-24 | Hewlett-Packard Company | Device to translate logical unit number communications on one SCSI bus to ID communications on a subordinate SCSI bus |
US5247692A (en) | 1988-02-08 | 1993-09-21 | Nec Corporation | Multiple file system having a plurality of file units holding the same files in which loss of data is prevented in a failure of a file unit |
US5247638A (en) | 1990-06-18 | 1993-09-21 | Storage Technology Corporation | Apparatus for compressing data in a dynamically mapped virtual data storage subsystem |
US5257386A (en) | 1990-04-05 | 1993-10-26 | Fujitsu Limited | Data transfer control system for virtual machine system |
US5297262A (en) | 1989-11-28 | 1994-03-22 | International Business Machines Corporation | Methods and apparatus for dynamically managing input/output (I/O) connectivity |
US5301290A (en) | 1990-03-14 | 1994-04-05 | International Business Machines Corporation | Method for minimizing lock processing while ensuring consistency among pages common to local processor caches and a shared external store |
US5315657A (en) | 1990-09-28 | 1994-05-24 | Digital Equipment Corporation | Compound principals in access control lists |
US5317693A (en) | 1991-04-04 | 1994-05-31 | Digital Equipment Corporation | Computer peripheral device network with peripheral address resetting capabilities |
US5331673A (en) | 1992-03-30 | 1994-07-19 | International Business Machines Corporation | Integrity of data objects used to maintain state information for shared data at a local complex |
US5334673A (en) | 1990-07-20 | 1994-08-02 | Acushnet Co. | Polyurethane golf ball |
US5347384A (en) | 1992-06-30 | 1994-09-13 | Loral Aerospace Corp. | Fiber optic distribution of image data |
US5367646A (en) | 1991-07-15 | 1994-11-22 | Bull S.A. | Universal device for coupling a computer bus to a controller of a group of peripherals |
US5379385A (en) | 1990-06-22 | 1995-01-03 | International Business Machines Corporation | Method and means for effectuating rule based I/O data transfer address control via address control words |
US5379398A (en) | 1992-04-20 | 1995-01-03 | International Business Machines Corporation | Method and system for concurrent access during backup copying of data |
JPH0720994A (en) | 1993-06-30 | 1995-01-24 | Hitachi Ltd | Storage system |
US5388246A (en) | 1989-09-28 | 1995-02-07 | Nec Corporation | Arrangement and method of controlling memory access requests in digital data processing system |
US5388243A (en) | 1990-03-09 | 1995-02-07 | Mti Technology Corporation | Multi-sort mass storage device announcing its active paths without deactivating its ports in a network architecture |
US5394402A (en) | 1993-06-17 | 1995-02-28 | Ascom Timeplex Trading Ag | Hub for segmented virtual local area network with shared media access |
US5394526A (en) | 1993-02-01 | 1995-02-28 | Lsc, Inc. | Data server for transferring selected blocks of remote file to a distributed computer network involving only single data transfer operation |
US5396596A (en) | 1992-09-22 | 1995-03-07 | Unisys Corporation | Mass data storage and retrieval system providing multiple transfer paths with multiple buffer memories |
JPH0720994B2 (en) | 1984-03-23 | 1995-03-08 | ベーリングヴエルケ・アクチエンゲゼルシヤフト | Tissue protein PP (below 2) (below 1) and its acquisition method |
US5403639A (en) | 1992-09-02 | 1995-04-04 | Storage Technology Corporation | File server having snapshot application data groups |
US5410667A (en) | 1992-04-17 | 1995-04-25 | Storage Technology Corporation | Data record copy system for a disk drive array data storage subsystem |
US5410697A (en) | 1990-04-04 | 1995-04-25 | International Business Machines Corporation | Concurrency management using version identification of shared data as a supplement to use of locks |
US5414820A (en) | 1991-08-23 | 1995-05-09 | Nexgen, Inc. | Crossing transfers for maximizing the effective bandwidth in a dual-bus architecture |
US5416915A (en) | 1992-12-11 | 1995-05-16 | International Business Machines Corporation | Method and system for minimizing seek affinity and enhancing write sensitivity in a DASD array |
US5418909A (en) | 1988-12-30 | 1995-05-23 | International Business Machines Corporation | System for controlling multiple port/multiple channel I/O configuration according to communication request initiation status |
US5420988A (en) | 1990-08-31 | 1995-05-30 | International Business Machines Corporation | Establishing logical paths through a switch between channels and control units in a computer I/O system |
US5423044A (en) | 1992-06-16 | 1995-06-06 | International Business Machines Corporation | Shared, distributed lock manager for loosely coupled processing systems |
US5423026A (en) | 1991-09-05 | 1995-06-06 | International Business Machines Corporation | Method and apparatus for performing control unit level recovery operations |
US5426637A (en) | 1992-12-14 | 1995-06-20 | International Business Machines Corporation | Methods and apparatus for interconnecting local area networks with wide area backbone networks |
US5430855A (en) | 1991-02-06 | 1995-07-04 | Storage Technology Corporation | Disk drive array memory system using nonuniform disk drives |
US5450570A (en) | 1988-09-09 | 1995-09-12 | Compaq Computer Corp. | Computer implemented method and apparatus for dynamic configuration of a computer system and circuit boards including computer resource allocation conflict resolution |
US5452421A (en) | 1992-09-23 | 1995-09-19 | International Business Machines Corporation | System for using register sets and state machines sets to communicate between storage controller and devices by using failure condition activity defined in a request |
US5459857A (en) | 1992-05-15 | 1995-10-17 | Storage Technology Corporation | Fault tolerant disk array data storage subsystem |
US5463754A (en) | 1992-10-30 | 1995-10-31 | International Business Machines Corporation | Shared direct access storage device for fixed block architecture devices |
US5465382A (en) | 1992-04-17 | 1995-11-07 | International Business Machines Corporation | System and method for mapping directly accessible magnetic DASD storage to fixed block optical storage |
US5469576A (en) | 1993-03-22 | 1995-11-21 | International Business Machines Corporation | Front end for file access controller |
US5471609A (en) | 1992-09-22 | 1995-11-28 | International Business Machines Corporation | Method for identifying a system holding a `Reserve` |
US5487077A (en) | 1994-05-23 | 1996-01-23 | International Business Machines Corporation | Location dependent variable error correction processing for multi-track recording media using variable length coding means |
US5491812A (en) | 1992-09-28 | 1996-02-13 | Conner Peripherals, Inc. | System and method for ethernet to SCSI conversion |
US5495474A (en) | 1991-03-29 | 1996-02-27 | International Business Machines Corp. | Switch-based microchannel planar apparatus |
US5496576A (en) | 1993-09-28 | 1996-03-05 | Goldstar Co., Ltd. | Method for thawing food in microwave oven |
US5504857A (en) | 1990-06-08 | 1996-04-02 | International Business Machines | Highly available fault tolerant relocation of storage with atomicity |
US5507032A (en) | 1990-03-09 | 1996-04-09 | Fujitsu Limited | Multiprocessor I/O request control system forming device drive queue and processor interrupt queue from rows and cells of I/O request table and interrupt request table |
US5511169A (en) | 1992-03-02 | 1996-04-23 | Mitsubishi Denki Kabushiki Kaisha | Data transmission apparatus and a communication path management method therefor |
US5519695A (en) | 1994-10-27 | 1996-05-21 | Hewlett-Packard Company | Switch element for fiber channel networks |
US5530845A (en) | 1992-05-13 | 1996-06-25 | Southwestern Bell Technology Resources, Inc. | Storage control subsystem implemented with an application program on a computer |
US5535352A (en) | 1994-03-24 | 1996-07-09 | Hewlett-Packard Company | Access hints for input/output address translation mechanisms |
GB2296798A (en) | 1995-01-05 | 1996-07-10 | Spring Consultants Limited | Storing data efficiently on a RAID |
US5537585A (en) | 1994-02-25 | 1996-07-16 | Avail Systems Corporation | Data storage management for network interconnected processors |
US5544313A (en) | 1994-05-11 | 1996-08-06 | International Business Machines Corporation | Baton passing optimization scheme for load balancing/configuration planning in a video-on-demand computer system |
GB2297636A (en) | 1995-02-02 | 1996-08-07 | Spring Consultants Limited | Storing data on emulated, logical, removable, disc drives |
US5548791A (en) | 1994-07-25 | 1996-08-20 | International Business Machines Corporation | Input/output control system with plural channel paths to I/O devices |
JPH08230895A (en) | 1995-02-28 | 1996-09-10 | Shuichi Higuchi | Grain storing bag |
US5568648A (en) | 1991-06-05 | 1996-10-22 | International Business Machines Corporation | Indirect addressing of channels via logical channel groups |
US5581724A (en) | 1992-10-19 | 1996-12-03 | Storage Technology Corporation | Dynamically mapped data storage subsystem having multiple open destage cylinders and method of managing that subsystem |
US5581709A (en) | 1995-03-15 | 1996-12-03 | Mitsubishi Denki Kabushiki Kaisha | Multiple computer system using I/O port adaptor to selectively route transaction packets to host or shared I/O device |
US5581714A (en) | 1993-05-28 | 1996-12-03 | International Business Machines Corporation | Bus-to-bus read prefetch logic for improving information transfers in a multi-bus information handling system (bus-to-bus bridge for a multiple bus information handling system that optimizes data transfers between a system bus and a peripheral bus) |
US5596736A (en) | 1992-07-22 | 1997-01-21 | Fujitsu Limited | Data transfers to a backing store of a dynamically mapped data storage system in which data has nonsequential logical addresses |
US5596562A (en) | 1995-01-19 | 1997-01-21 | United Microelectronics Corp. | Controlling method and apparatus for supporting hard disk and/or CD-ROM drives through the PCMCIA interface |
US5598541A (en) | 1994-10-24 | 1997-01-28 | Lsi Logic Corporation | Node loop port communication interface super core for fibre channel |
US5613082A (en) | 1993-06-14 | 1997-03-18 | International Business Machines Corporation | Control of record media using device only accessible control areas and directory of media control marks and error history |
US5621902A (en) | 1994-11-30 | 1997-04-15 | International Business Machines Corporation | Computer system having a bridge between two buses with a direct memory access controller and an alternative memory access controller |
US5632012A (en) | 1993-11-24 | 1997-05-20 | Storage Technology Corporation | Disk scrubbing system |
US5634111A (en) | 1992-03-16 | 1997-05-27 | Hitachi, Ltd. | Computer system including a device with a plurality of identifiers |
US5638518A (en) | 1994-10-24 | 1997-06-10 | Lsi Logic Corporation | Node loop core for implementing transmission protocol in fibre channel |
US5642515A (en) | 1992-04-17 | 1997-06-24 | International Business Machines Corporation | Network server for local and remote resources |
JPH09185594A (en) | 1995-11-13 | 1997-07-15 | Tandem Comput Inc | Direct bulk data transfer |
US5659756A (en) | 1995-03-31 | 1997-08-19 | International Business Machines Corporation | Method and system for providing access to logical partition information on a per resource basis |
US5664107A (en) | 1992-10-13 | 1997-09-02 | Bay Networks, Inc. | Method for providing for automatic topology discovery in an ATM network or the like |
WO1997033227A1 (en) | 1996-03-07 | 1997-09-12 | Nippon Telegraph And Telephone Corporation | High-speed batch file transfer method and apparatus, and storage medium in which a program for executing the transfer is stored |
JPH09251437A (en) | 1996-03-18 | 1997-09-22 | Toshiba Corp | Computer device and continuous data server device |
US5680556A (en) | 1993-11-12 | 1997-10-21 | International Business Machines Corporation | Computer system and method of operation thereof wherein a BIOS ROM can be selectively locatable on diffeent buses |
US5684800A (en) | 1995-11-15 | 1997-11-04 | Cabletron Systems, Inc. | Method for establishing restricted broadcast groups in a switched network |
EP0810530A2 (en) | 1996-05-31 | 1997-12-03 | Sun Microsystems, Inc. | A method and apparatus for passing bus mastership |
US5701491A (en) | 1995-05-31 | 1997-12-23 | Microsoft Corporation, Inc. | Method and system for transitioning the network mode of a workstation |
US5712976A (en) | 1994-09-08 | 1998-01-27 | International Business Machines Corporation | Video data streamer for simultaneously conveying same one or different ones of data blocks stored in storage node to each of plurality of communication nodes |
EP0827059A2 (en) | 1996-08-30 | 1998-03-04 | NEC Corporation | Disk apparatus |
US5727218A (en) | 1996-03-05 | 1998-03-10 | Unisys Corp. | Controlling an apparatus disposed for adapting fiber channel transmissions to an industry standard data bus |
US5729705A (en) | 1995-07-24 | 1998-03-17 | Symbios Logic Inc. | Method and apparatus for enhancing throughput of disk array data transfers in a controller |
US5743847A (en) | 1995-01-13 | 1998-04-28 | Olympus Optical Co., Ltd. | Stereoscopic endoscope having image transmitting optical-system and pupil dividing unit that are axially movable with respect to each other |
US5748924A (en) | 1995-10-17 | 1998-05-05 | Methode Electronics, Inc. | Method and apparatus for transferring data from SCSI bus to serial device and from serial device to SCSI bus |
US5751975A (en) | 1995-12-28 | 1998-05-12 | Intel Corporation | Method and apparatus for interfacing a device compliant to a first bus protocol to an external bus having a second bus protocol and for providing virtual functions through a multi-function intelligent bridge |
US5751971A (en) | 1995-07-12 | 1998-05-12 | Cabletron Systems, Inc. | Internet protocol (IP) work group routing |
US5768623A (en) | 1995-09-19 | 1998-06-16 | International Business Machines Corporation | System and method for sharing multiple storage arrays by dedicating adapters as primary controller and secondary controller for arrays reside in different host computers |
US5774683A (en) | 1996-10-21 | 1998-06-30 | Advanced Micro Devices, Inc. | Interconnect bus configured to implement multiple transfer protocols |
US5778411A (en) | 1995-05-16 | 1998-07-07 | Symbios, Inc. | Method for virtual to physical mapping in a mapped compressed virtual storage subsystem |
US5781715A (en) | 1992-10-13 | 1998-07-14 | International Business Machines Corporation | Fault-tolerant bridge/router with a distributed switch-over mechanism |
WO1998036357A1 (en) | 1997-02-05 | 1998-08-20 | Transwitch Corporation | Shared memory control using multiple linked lists with pointers, status flags, memory block counters and parity |
US5802278A (en) | 1995-05-10 | 1998-09-01 | 3Com Corporation | Bridge/router architecture for high performance scalable networking |
US5805816A (en) | 1992-05-12 | 1998-09-08 | Compaq Computer Corp. | Network packet switch using shared memory for repeating and bridging packets at media rate |
US5809328A (en) | 1995-12-21 | 1998-09-15 | Unisys Corp. | Apparatus for fibre channel transmission having interface logic, buffer memory, multiplexor/control device, fibre channel controller, gigabit link module, microprocessor, and bus control device |
US5812754A (en) | 1996-09-18 | 1998-09-22 | Silicon Graphics, Inc. | Raid system with fibre channel arbitrated loop |
US5835496A (en) | 1996-04-30 | 1998-11-10 | Mcdata Corporation | Method and apparatus for data alignment |
US5845107A (en) | 1996-07-03 | 1998-12-01 | Intel Corporation | Signaling protocol conversion between a processor and a high-performance system bus |
US5848251A (en) | 1996-08-06 | 1998-12-08 | Compaq Computer Corporation | Secondary channel for command information for fibre channel system interface bus |
US5845722A (en) | 1995-10-09 | 1998-12-08 | Baker Hughes Incorporated | Method and apparatus for drilling boreholes in earth formations (drills in liner systems) |
US5857080A (en) | 1996-09-10 | 1999-01-05 | Lsi Logic Corporation | Apparatus and method for address translation in bus bridge devices |
US5860137A (en) | 1995-07-21 | 1999-01-12 | Emc Corporation | Dynamic load balancing |
US5864653A (en) | 1996-12-31 | 1999-01-26 | Compaq Computer Corporation | PCI hot spare capability for failed components |
US5867648A (en) | 1996-10-09 | 1999-02-02 | General Signal Corporation | High speed heterogeneous coupling of computer systems using channel-to-channel protocol |
US5881311A (en) | 1996-06-05 | 1999-03-09 | Fastor Technologies, Inc. | Data storage subsystem with block based data management |
US5884027A (en) | 1995-06-15 | 1999-03-16 | Intel Corporation | Architecture for an I/O processor that integrates a PCI to PCI bridge |
US5889952A (en) | 1996-08-14 | 1999-03-30 | Microsoft Corporation | Access check system utilizing cached access permissions |
US5913045A (en) | 1995-12-20 | 1999-06-15 | Intel Corporation | Programmable PCI interrupt routing mechanism |
WO1999034297A1 (en) | 1997-12-31 | 1999-07-08 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
US5923557A (en) | 1997-08-01 | 1999-07-13 | Hewlett-Packard Company | Method and apparatus for providing a standard interface to process control devices that are adapted to differing field-bus protocols |
US5933824A (en) | 1996-12-23 | 1999-08-03 | Lsi Logic Corporation | Methods and apparatus for locking files within a clustered storage environment |
US5935260A (en) | 1997-05-02 | 1999-08-10 | Emc Corporation | Method and apparatus for providing system level errors in a large disk array storage system |
US5935205A (en) | 1995-06-22 | 1999-08-10 | Hitachi, Ltd. | Computer system having a plurality of computers each providing a shared storage access processing mechanism for controlling local/remote access to shared storage devices |
US5941969A (en) | 1997-10-22 | 1999-08-24 | Auspex Systems, Inc. | Bridge for direct data storage device access |
US5953511A (en) | 1997-04-08 | 1999-09-14 | National Instruments Corporation | PCI bus to IEEE 1394 bus translator |
US5959994A (en) | 1996-08-19 | 1999-09-28 | Ncr Corporation | ATM/SONET network enhanced as a universal computer system interconnect |
US5963556A (en) | 1993-06-23 | 1999-10-05 | Digital Equipment Corporation | Device for partitioning ports of a bridge into groups of different virtual local area networks |
US5974530A (en) | 1996-03-15 | 1999-10-26 | Adaptec, Inc. | Integrated PCI buffer controller and XOR function circuit |
US5978379A (en) | 1997-01-23 | 1999-11-02 | Gadzoox Networks, Inc. | Fiber channel learning bridge, learning half bridge, and protocol |
US5991797A (en) | 1997-12-23 | 1999-11-23 | Intel Corporation | Method for directing I/O transactions between an I/O device and a memory |
US6000020A (en) | 1997-04-01 | 1999-12-07 | Gadzoox Networks, Inc. | Hierarchical storage management from a mirrored file system on a storage network segmented by a bridge |
US6021451A (en) | 1994-05-20 | 2000-02-01 | Intel Corporation | Method and apparatus for maintaining transaction ordering and arbitrating in a bus bridge |
US6029168A (en) | 1998-01-23 | 2000-02-22 | Tricord Systems, Inc. | Decentralized file mapping in a striped network file system in a distributed computing environment |
US6032269A (en) | 1998-06-30 | 2000-02-29 | Digi-Data Corporation | Firmware recovery from hanging channels by buffer analysis |
US6041381A (en) | 1998-02-05 | 2000-03-21 | Crossroads Systems, Inc. | Fibre channel to SCSI addressing method and system |
US6041058A (en) | 1997-09-11 | 2000-03-21 | 3Com Corporation | Hardware filtering method and apparatus |
GB2341715A (en) | 1998-09-17 | 2000-03-22 | Springtek Limited | Magnetic disk redundant array |
US6055603A (en) | 1997-09-18 | 2000-04-25 | Emc Corporation | Method and apparatus for performing pre-request operations in a cached disk array storage system |
US6065087A (en) | 1998-05-21 | 2000-05-16 | Hewlett-Packard Company | Architecture for a high-performance network/bus multiplexer interconnecting a network and a bus that transport data using multiple protocols |
US6070253A (en) | 1996-12-31 | 2000-05-30 | Compaq Computer Corporation | Computer diagnostic board that provides system monitoring and permits remote terminal access |
US6073209A (en) | 1997-03-31 | 2000-06-06 | Ark Research Corporation | Data storage controller providing multiple hosts with access to multiple storage subsystems |
US6073218A (en) | 1996-12-23 | 2000-06-06 | Lsi Logic Corp. | Methods and apparatus for coordinating shared multiple raid controller access to common storage devices |
US6075863A (en) | 1996-02-28 | 2000-06-13 | Encanto Networks | Intelligent communication device |
US6081849A (en) | 1996-10-01 | 2000-06-27 | Lsi Logic Corporation | Method and structure for switching multiple contexts in storage subsystem target device |
US6098149A (en) | 1997-06-13 | 2000-08-01 | Emc Corporation | Method and apparatus for extending commands in a cached disk array |
US6098128A (en) | 1995-09-18 | 2000-08-01 | Cyberstorage Systems Corporation | Universal storage management system |
US6108684A (en) | 1996-12-23 | 2000-08-22 | Lsi Logic Corporation | Methods and apparatus for balancing loads on a storage subsystem among a plurality of controllers |
US6118776A (en) | 1997-02-18 | 2000-09-12 | Vixel Corporation | Methods and apparatus for fiber channel interconnection of private loop devices |
US6118766A (en) | 1996-08-21 | 2000-09-12 | Godigital Networks Corporation | Multiple ISDN carrier system |
US6131119A (en) | 1997-04-01 | 2000-10-10 | Sony Corporation | Automatic configuration system for mapping node addresses within a bus structure to their physical location |
US6134617A (en) | 1998-04-03 | 2000-10-17 | Lsi Logic Corporation | Method and apparatus for managing access to a loop in a data processing system |
US6141737A (en) | 1995-10-11 | 2000-10-31 | Citrix Systems, Inc. | Method for dynamically and efficiently caching objects received from an application server by a client computer by subdividing cache memory blocks into equally-sized sub-blocks |
US6145006A (en) | 1997-06-25 | 2000-11-07 | Emc Corporation | Method and apparatus for coordinating locking operations of heterogeneous host computers accessing a storage subsystem |
US6148004A (en) | 1998-02-11 | 2000-11-14 | Mcdata Corporation | Method and apparatus for establishment of dynamic ESCON connections from fibre channel frames |
US6147976A (en) | 1996-06-24 | 2000-11-14 | Cabletron Systems, Inc. | Fast network layer packet filter |
US6173399B1 (en) | 1997-06-12 | 2001-01-09 | Vpnet Technologies, Inc. | Apparatus for implementing virtual private networks |
US6185203B1 (en) | 1997-02-18 | 2001-02-06 | Vixel Corporation | Fibre channel switching fabric |
US6202153B1 (en) | 1996-11-22 | 2001-03-13 | Voltaire Advanced Data Security Ltd. | Security switching device |
US6209023B1 (en) | 1998-04-24 | 2001-03-27 | Compaq Computer Corporation | Supporting a SCSI device on a non-SCSI transport medium of a network |
US6223266B1 (en) | 1997-08-20 | 2001-04-24 | Cypress Semiconductor Corp. | System and method for interfacing an input/output system memory to a host computer system memory |
US6230218B1 (en) | 1998-10-14 | 2001-05-08 | International Business Machines Corporation | Apparatus for transferring execution of certain channel functions to a control unit and having means for combining certain commands and data packets in one sequence |
US6243827B1 (en) | 1998-06-30 | 2001-06-05 | Digi-Data Corporation | Multiple-channel failure detection in raid systems |
US6260120B1 (en) | 1998-06-29 | 2001-07-10 | Emc Corporation | Storage mapping and partitioning among multiple host processors in the presence of login state changes and host controller replacement |
US6268789B1 (en) | 1996-11-22 | 2001-07-31 | Voltaire Advanced Data Security Ltd. | Information security method and apparatus |
US6308247B1 (en) | 1994-09-09 | 2001-10-23 | International Business Machines Corporation | Page table entry management method and apparatus for a microkernel data processing system |
US6330629B1 (en) | 1993-02-11 | 2001-12-11 | Hitachi, Ltd. | Information processing system |
US6330687B1 (en) | 1998-11-13 | 2001-12-11 | Digi-Data Corporation | System and method to maintain performance among N single raid systems during non-fault conditions while sharing multiple storage devices during conditions of a faulty host computer or faulty storage array controller |
US6341315B1 (en) | 1999-02-26 | 2002-01-22 | Crossroads Systems, Inc. | Streaming method and system for fiber channel network devices |
US6343324B1 (en) | 1999-09-13 | 2002-01-29 | International Business Machines Corporation | Method and system for controlling access share storage devices in a network environment by configuring host-to-volume mapping data structures in the controller memory for granting and denying access to the devices |
US6401170B1 (en) | 1999-08-18 | 2002-06-04 | Digi-Data Corporation | RAID systems during non-fault and faulty conditions on a fiber channel arbitrated loop, SCSI bus or switch fabric configuration |
US20020083221A1 (en) | 2000-11-01 | 2002-06-27 | Accusys, Inc. | Universal disk array controller |
US6425052B1 (en) | 1999-10-28 | 2002-07-23 | Sun Microsystems, Inc. | Load balancing configuration for storage arrays employing mirroring and striping |
US6453345B2 (en) | 1996-11-06 | 2002-09-17 | Datadirect Networks, Inc. | Network security and surveillance system |
US6484245B1 (en) | 1997-05-29 | 2002-11-19 | Hitachi, Ltd. | Apparatus for and method of accessing a storage region across a network |
USD470486S1 (en) | 2001-07-09 | 2003-02-18 | Promise Technology, Inc. | Cassette box for hard disk |
US6529996B1 (en) | 1997-03-12 | 2003-03-04 | Storage Technology Corporation | Network attached virtual tape data storage subsystem |
US6547576B2 (en) | 2001-09-17 | 2003-04-15 | Promise Technology Inc. | Power source connector assembly for an extractable hard drive box |
US6560750B2 (en) | 2001-07-27 | 2003-05-06 | Promise Technology Inc. | Method for providing master-slave heat-swapping apparatus and mechanism on a mono-ATA bus |
US6563701B1 (en) | 2001-09-17 | 2003-05-13 | Promise Technology Inc. | Structure for hard disk drawing box |
US6775693B1 (en) | 2000-03-30 | 2004-08-10 | Baydel Limited | Network DMA method |
US6792602B2 (en) | 2000-12-20 | 2004-09-14 | Promise Technology, Inc. | Method and device of controlling external system parameters using ATA side band |
US6820212B2 (en) | 2001-02-20 | 2004-11-16 | Digi-Data Corporation | RAID system having channel capacity unaffected by any single component failure |
US6854027B2 (en) | 2003-06-26 | 2005-02-08 | Promise Technology, Inc. | Hard disk device capable of detecting channels of a host to which hard disk controllers belong |
US6862637B1 (en) | 2002-03-30 | 2005-03-01 | Iqstor Networks | Method and system for locating devices over a serial bus |
US6874043B2 (en) | 2000-10-17 | 2005-03-29 | Bridgeworks Ltd. | Data buffer |
US6874100B2 (en) | 2001-07-12 | 2005-03-29 | Digi-Data Corporation | Raid system with multiple controllers and proof against any single point of failure |
US6910083B2 (en) | 2003-06-26 | 2005-06-21 | Promise Technology, Inc. | Method for detecting channels of a host to which hard disk controllers belong |
US7065076B1 (en) | 2000-08-25 | 2006-06-20 | Promise Technology, Inc. | Modular scalable switching networks |
US7127668B2 (en) | 2000-06-15 | 2006-10-24 | Datadirect Networks, Inc. | Data management architecture |
US7133965B2 (en) | 2003-12-15 | 2006-11-07 | Promise Technology, Inc. | Raid storage device |
US20060277326A1 (en) | 2005-06-06 | 2006-12-07 | Accusys, Inc. | Data transfer system and method |
US20060294416A1 (en) | 2005-06-22 | 2006-12-28 | Accusys, Inc. | XOR circuit, raid device capable of recovering a plurality of failures and method thereof |
US7188111B2 (en) | 2002-07-12 | 2007-03-06 | Datadirect Technologies Corp. | System and method for connectivity to structured query language database |
US7216225B2 (en) | 2000-05-24 | 2007-05-08 | Voltaire Ltd. | Filtered application-to-application communication |
US7251248B2 (en) | 2001-07-31 | 2007-07-31 | Bridgeworks Ltd. | Connection device |
US7281072B2 (en) | 2003-07-02 | 2007-10-09 | Infortrend Technology, Inc. | Redundant external storage virtualization computer system |
-
2008
- 2008-07-24 US US12/220,431 patent/USRE42761E1/en not_active Expired - Fee Related
Patent Citations (253)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3082406A (en) | 1957-08-08 | 1963-03-19 | Ibm | Decoding device |
US4092732A (en) | 1977-05-31 | 1978-05-30 | International Business Machines Corporation | System for recovering data stored in failed memory unit |
US4170415A (en) | 1977-07-15 | 1979-10-09 | The United States Of America As Represented By The Secretary Of The Interior | System for producing orthophotographs |
US4415970A (en) | 1980-11-14 | 1983-11-15 | Sperry Corporation | Cache/disk subsystem with load equalization |
US4455605A (en) | 1981-07-23 | 1984-06-19 | International Business Machines Corporation | Method for establishing variable path group associations and affiliations between "non-static" MP systems and shared devices |
US4811278A (en) | 1981-10-05 | 1989-03-07 | Bean Robert G | Secondary storage facility employing serial communications between drive and controller |
US4825406A (en) | 1981-10-05 | 1989-04-25 | Digital Equipment Corporation | Secondary storage facility employing serial communications between drive and controller |
US4533996A (en) | 1982-02-23 | 1985-08-06 | International Business Machines Corporation | Peripheral systems accommodation of guest operating systems |
US4504927A (en) | 1982-09-08 | 1985-03-12 | Allen-Bradley Company | Programmable controller with expandable I/O interface circuitry |
US4644462A (en) | 1982-09-13 | 1987-02-17 | Fujitsu Limited | Input/output interrupt system |
US4620295A (en) | 1983-03-07 | 1986-10-28 | International Business Machines Corporation | Method for accessing a data set in a word processing system |
US4573152A (en) | 1983-05-13 | 1986-02-25 | Greene Richard E | Switch matrix test and control system |
US4603380A (en) | 1983-07-01 | 1986-07-29 | International Business Machines Corporation | DASD cache block staging |
JPH0720994B2 (en) | 1984-03-23 | 1995-03-08 | ベーリングヴエルケ・アクチエンゲゼルシヤフト | Tissue protein PP (below 2) (below 1) and its acquisition method |
US4697232A (en) | 1984-11-30 | 1987-09-29 | Storage Technology Corporation | I/O device reconnection in a multiple-CPU, dynamic path allocation environment |
US4695948A (en) | 1985-02-28 | 1987-09-22 | International Business Machines Corporation | Bus to bus converter using a RAM for multiple address mapping |
US4821179A (en) | 1985-08-08 | 1989-04-11 | American Telephone And Telegraph Company | Communication system configuration detection apparatus and method |
US4787028A (en) | 1985-09-03 | 1988-11-22 | Ncr Corporation | Multicommunication protocol controller |
US4807180A (en) | 1985-11-20 | 1989-02-21 | Hitachi, Ltd. | Multiple control system for disk storage and method for realizing same |
US4751635A (en) | 1986-04-16 | 1988-06-14 | Bell Communications Research, Inc. | Distributed management support system for software managers |
US4835674A (en) | 1986-07-28 | 1989-05-30 | Bull Hn Information Systems Inc. | Computer network system for multiple processing elements |
US4715030A (en) | 1986-08-04 | 1987-12-22 | General Electric Company | Local area network bridge |
US4827411A (en) | 1987-06-15 | 1989-05-02 | International Business Machines Corporation | Method of maintaining a topology database |
US4864532A (en) | 1987-09-21 | 1989-09-05 | Unisys Corporation | Small computer systems interface--data link processor |
US4845722A (en) | 1987-10-16 | 1989-07-04 | Digital Equipment Corporation | Computer interconnect coupler employing crossbar switching |
US5239643A (en) | 1987-11-30 | 1993-08-24 | International Business Machines Corporation | Method for reducing disk I/O accesses in a multi-processor clustered type data processing system |
US5247692A (en) | 1988-02-08 | 1993-09-21 | Nec Corporation | Multiple file system having a plurality of file units holding the same files in which loss of data is prevented in a failure of a file unit |
US4947367A (en) | 1988-03-28 | 1990-08-07 | Emc Corporation | System for converting digital data from magnetic tape format apparatus and method for converting a sequentially accessible magnetic tape data format to directly accessible write-once disk data format to worm optical disk format |
US4897874A (en) | 1988-03-31 | 1990-01-30 | American Telephone And Telegraph Company At&T Bell Laboratories | Metropolitan area network arrangement for serving virtual data networks |
US5077736A (en) | 1988-06-28 | 1991-12-31 | Storage Technology Corporation | Disk drive memory |
US5450570A (en) | 1988-09-09 | 1995-09-12 | Compaq Computer Corp. | Computer implemented method and apparatus for dynamic configuration of a computer system and circuit boards including computer resource allocation conflict resolution |
US5193168A (en) | 1988-10-31 | 1993-03-09 | International Business Machines Corporation | Multiprocessing system with enhanced shared storage |
US5077732C1 (en) | 1988-11-14 | 2001-08-14 | Datapoint Corp | Lan with dynamically selectable multiple operational capabilities |
US5077732A (en) | 1988-11-14 | 1991-12-31 | Datapoint Corporation | LAN with dynamically selectable multiple operational capabilities |
US5418909A (en) | 1988-12-30 | 1995-05-23 | International Business Machines Corporation | System for controlling multiple port/multiple channel I/O configuration according to communication request initiation status |
US4961224A (en) | 1989-03-06 | 1990-10-02 | Darby Yung | Controlling access to network resources |
US5163131A (en) | 1989-09-08 | 1992-11-10 | Auspex Systems, Inc. | Parallel i/o network file server architecture |
WO1991003788A1 (en) | 1989-09-08 | 1991-03-21 | Auspex Systems, Inc. | Parallel i/o network file server architecture |
US5355453A (en) | 1989-09-08 | 1994-10-11 | Auspex Systems, Inc. | Parallel I/O network file server architecture |
CA2066443C (en) | 1989-09-08 | 2003-10-21 | Edward John Row | Parallel i/o newtork file server architecture |
EP0490973B1 (en) | 1989-09-08 | 1998-02-25 | Auspex Systems, Inc. | Parallel i/o network file server architecture |
AU647414B2 (en) | 1989-09-08 | 1994-03-24 | Network Appliance, Inc. | Parallel I/O network file server architecture |
IL107645A (en) | 1989-09-08 | 1996-09-12 | Auspex Systems Inc | Parallel I/O network file server architecture |
AU670376B2 (en) | 1989-09-08 | 1996-07-11 | Network Appliance, Inc. | Parallel I/O network file server architecture |
US5388246A (en) | 1989-09-28 | 1995-02-07 | Nec Corporation | Arrangement and method of controlling memory access requests in digital data processing system |
US5239654A (en) | 1989-11-17 | 1993-08-24 | Texas Instruments Incorporated | Dual mode SIMD/MIMD processor providing reuse of MIMD instruction memories as data memories when operating in SIMD mode |
US5297262A (en) | 1989-11-28 | 1994-03-22 | International Business Machines Corporation | Methods and apparatus for dynamically managing input/output (I/O) connectivity |
US5072378A (en) | 1989-12-18 | 1991-12-10 | Storage Technology Corporation | Direct access storage device with independently stored parity |
US5507032A (en) | 1990-03-09 | 1996-04-09 | Fujitsu Limited | Multiprocessor I/O request control system forming device drive queue and processor interrupt queue from rows and cells of I/O request table and interrupt request table |
US5388243A (en) | 1990-03-09 | 1995-02-07 | Mti Technology Corporation | Multi-sort mass storage device announcing its active paths without deactivating its ports in a network architecture |
US5185876A (en) | 1990-03-14 | 1993-02-09 | Micro Technology, Inc. | Buffering system for dynamically providing data to multiple storage elements |
US5301290A (en) | 1990-03-14 | 1994-04-05 | International Business Machines Corporation | Method for minimizing lock processing while ensuring consistency among pages common to local processor caches and a shared external store |
US5226143A (en) | 1990-03-14 | 1993-07-06 | International Business Machines Corporation | Multiprocessor system includes operating system for notifying only those cache managers who are holders of shared locks on a designated page by global lock manager |
US5410697A (en) | 1990-04-04 | 1995-04-25 | International Business Machines Corporation | Concurrency management using version identification of shared data as a supplement to use of locks |
US5257386A (en) | 1990-04-05 | 1993-10-26 | Fujitsu Limited | Data transfer control system for virtual machine system |
US5202856A (en) | 1990-04-05 | 1993-04-13 | Micro Technology, Inc. | Method and apparatus for simultaneous, interleaved access of multiple memories by multiple ports |
US5214778A (en) | 1990-04-06 | 1993-05-25 | Micro Technology, Inc. | Resource management in a multiple resource system |
US5361347A (en) | 1990-04-06 | 1994-11-01 | Mti Technology Corporation | Resource management in a multiple resource system where each resource includes an availability state stored in a memory of the resource |
US5212785A (en) | 1990-04-06 | 1993-05-18 | Micro Technology, Inc. | Apparatus and method for controlling data flow between a computer and memory devices |
US5124987A (en) | 1990-04-16 | 1992-06-23 | Storage Technology Corporation | Logical track write scheduling system for a parallel disk drive array data storage subsystem |
US5504857A (en) | 1990-06-08 | 1996-04-02 | International Business Machines | Highly available fault tolerant relocation of storage with atomicity |
US5155845A (en) | 1990-06-15 | 1992-10-13 | Storage Technology Corporation | Data storage system for providing redundant copies of data on different disk drives |
US5247638A (en) | 1990-06-18 | 1993-09-21 | Storage Technology Corporation | Apparatus for compressing data in a dynamically mapped virtual data storage subsystem |
US5193184A (en) | 1990-06-18 | 1993-03-09 | Storage Technology Corporation | Deleted data file space release system for a dynamically mapped virtual data storage subsystem |
US5379385A (en) | 1990-06-22 | 1995-01-03 | International Business Machines Corporation | Method and means for effectuating rule based I/O data transfer address control via address control words |
US5334673A (en) | 1990-07-20 | 1994-08-02 | Acushnet Co. | Polyurethane golf ball |
US5420988A (en) | 1990-08-31 | 1995-05-30 | International Business Machines Corporation | Establishing logical paths through a switch between channels and control units in a computer I/O system |
US5210866A (en) | 1990-09-12 | 1993-05-11 | Storage Technology Corporation | Incremental disk backup system for a dynamically mapped data storage subsystem |
US5315657A (en) | 1990-09-28 | 1994-05-24 | Digital Equipment Corporation | Compound principals in access control lists |
US5430855A (en) | 1991-02-06 | 1995-07-04 | Storage Technology Corporation | Disk drive array memory system using nonuniform disk drives |
US5495474A (en) | 1991-03-29 | 1996-02-27 | International Business Machines Corp. | Switch-based microchannel planar apparatus |
US5317693A (en) | 1991-04-04 | 1994-05-31 | Digital Equipment Corporation | Computer peripheral device network with peripheral address resetting capabilities |
US5568648A (en) | 1991-06-05 | 1996-10-22 | International Business Machines Corporation | Indirect addressing of channels via logical channel groups |
US5367646A (en) | 1991-07-15 | 1994-11-22 | Bull S.A. | Universal device for coupling a computer bus to a controller of a group of peripherals |
US5414820A (en) | 1991-08-23 | 1995-05-09 | Nexgen, Inc. | Crossing transfers for maximizing the effective bandwidth in a dual-bus architecture |
US5423026A (en) | 1991-09-05 | 1995-06-06 | International Business Machines Corporation | Method and apparatus for performing control unit level recovery operations |
JPH05181609A (en) | 1992-01-06 | 1993-07-23 | Nec Corp | Personal computer system |
US5511169A (en) | 1992-03-02 | 1996-04-23 | Mitsubishi Denki Kabushiki Kaisha | Data transmission apparatus and a communication path management method therefor |
US5634111A (en) | 1992-03-16 | 1997-05-27 | Hitachi, Ltd. | Computer system including a device with a plurality of identifiers |
US5331673A (en) | 1992-03-30 | 1994-07-19 | International Business Machines Corporation | Integrity of data objects used to maintain state information for shared data at a local complex |
US5239632A (en) | 1992-04-16 | 1993-08-24 | Hewlett-Packard Company | Device to translate logical unit number communications on one SCSI bus to ID communications on a subordinate SCSI bus |
US5410667A (en) | 1992-04-17 | 1995-04-25 | Storage Technology Corporation | Data record copy system for a disk drive array data storage subsystem |
US5465382A (en) | 1992-04-17 | 1995-11-07 | International Business Machines Corporation | System and method for mapping directly accessible magnetic DASD storage to fixed block optical storage |
US5642515A (en) | 1992-04-17 | 1997-06-24 | International Business Machines Corporation | Network server for local and remote resources |
US5379398A (en) | 1992-04-20 | 1995-01-03 | International Business Machines Corporation | Method and system for concurrent access during backup copying of data |
US5805816A (en) | 1992-05-12 | 1998-09-08 | Compaq Computer Corp. | Network packet switch using shared memory for repeating and bridging packets at media rate |
US5530845A (en) | 1992-05-13 | 1996-06-25 | Southwestern Bell Technology Resources, Inc. | Storage control subsystem implemented with an application program on a computer |
US5459857A (en) | 1992-05-15 | 1995-10-17 | Storage Technology Corporation | Fault tolerant disk array data storage subsystem |
US5423044A (en) | 1992-06-16 | 1995-06-06 | International Business Machines Corporation | Shared, distributed lock manager for loosely coupled processing systems |
US5347384A (en) | 1992-06-30 | 1994-09-13 | Loral Aerospace Corp. | Fiber optic distribution of image data |
US5596736A (en) | 1992-07-22 | 1997-01-21 | Fujitsu Limited | Data transfers to a backing store of a dynamically mapped data storage system in which data has nonsequential logical addresses |
US5403639A (en) | 1992-09-02 | 1995-04-04 | Storage Technology Corporation | File server having snapshot application data groups |
US5471609A (en) | 1992-09-22 | 1995-11-28 | International Business Machines Corporation | Method for identifying a system holding a `Reserve` |
US5396596A (en) | 1992-09-22 | 1995-03-07 | Unisys Corporation | Mass data storage and retrieval system providing multiple transfer paths with multiple buffer memories |
US5452421A (en) | 1992-09-23 | 1995-09-19 | International Business Machines Corporation | System for using register sets and state machines sets to communicate between storage controller and devices by using failure condition activity defined in a request |
US5491812A (en) | 1992-09-28 | 1996-02-13 | Conner Peripherals, Inc. | System and method for ethernet to SCSI conversion |
US5664107A (en) | 1992-10-13 | 1997-09-02 | Bay Networks, Inc. | Method for providing for automatic topology discovery in an ATM network or the like |
US5781715A (en) | 1992-10-13 | 1998-07-14 | International Business Machines Corporation | Fault-tolerant bridge/router with a distributed switch-over mechanism |
US5581724A (en) | 1992-10-19 | 1996-12-03 | Storage Technology Corporation | Dynamically mapped data storage subsystem having multiple open destage cylinders and method of managing that subsystem |
US5463754A (en) | 1992-10-30 | 1995-10-31 | International Business Machines Corporation | Shared direct access storage device for fixed block architecture devices |
US5564019A (en) | 1992-10-30 | 1996-10-08 | International Business Machines Corporation | Program storage device and computer program product for managing a shared direct access storage device with a fixed block architecture |
US5416915A (en) | 1992-12-11 | 1995-05-16 | International Business Machines Corporation | Method and system for minimizing seek affinity and enhancing write sensitivity in a DASD array |
US5426637A (en) | 1992-12-14 | 1995-06-20 | International Business Machines Corporation | Methods and apparatus for interconnecting local area networks with wide area backbone networks |
US5394526A (en) | 1993-02-01 | 1995-02-28 | Lsc, Inc. | Data server for transferring selected blocks of remote file to a distributed computer network involving only single data transfer operation |
US6330629B1 (en) | 1993-02-11 | 2001-12-11 | Hitachi, Ltd. | Information processing system |
US5469576A (en) | 1993-03-22 | 1995-11-21 | International Business Machines Corporation | Front end for file access controller |
US5581714A (en) | 1993-05-28 | 1996-12-03 | International Business Machines Corporation | Bus-to-bus read prefetch logic for improving information transfers in a multi-bus information handling system (bus-to-bus bridge for a multiple bus information handling system that optimizes data transfers between a system bus and a peripheral bus) |
US5613082A (en) | 1993-06-14 | 1997-03-18 | International Business Machines Corporation | Control of record media using device only accessible control areas and directory of media control marks and error history |
US5394402A (en) | 1993-06-17 | 1995-02-28 | Ascom Timeplex Trading Ag | Hub for segmented virtual local area network with shared media access |
US5963556A (en) | 1993-06-23 | 1999-10-05 | Digital Equipment Corporation | Device for partitioning ports of a bridge into groups of different virtual local area networks |
JPH0720994A (en) | 1993-06-30 | 1995-01-24 | Hitachi Ltd | Storage system |
US5819054A (en) | 1993-06-30 | 1998-10-06 | Hitachi, Ltd. | Storage system realizing scalability and fault tolerance |
US5496576A (en) | 1993-09-28 | 1996-03-05 | Goldstar Co., Ltd. | Method for thawing food in microwave oven |
US5680556A (en) | 1993-11-12 | 1997-10-21 | International Business Machines Corporation | Computer system and method of operation thereof wherein a BIOS ROM can be selectively locatable on diffeent buses |
US5632012A (en) | 1993-11-24 | 1997-05-20 | Storage Technology Corporation | Disk scrubbing system |
US5537585A (en) | 1994-02-25 | 1996-07-16 | Avail Systems Corporation | Data storage management for network interconnected processors |
US5535352A (en) | 1994-03-24 | 1996-07-09 | Hewlett-Packard Company | Access hints for input/output address translation mechanisms |
US5544313A (en) | 1994-05-11 | 1996-08-06 | International Business Machines Corporation | Baton passing optimization scheme for load balancing/configuration planning in a video-on-demand computer system |
US6021451A (en) | 1994-05-20 | 2000-02-01 | Intel Corporation | Method and apparatus for maintaining transaction ordering and arbitrating in a bus bridge |
US5487077A (en) | 1994-05-23 | 1996-01-23 | International Business Machines Corporation | Location dependent variable error correction processing for multi-track recording media using variable length coding means |
US5548791A (en) | 1994-07-25 | 1996-08-20 | International Business Machines Corporation | Input/output control system with plural channel paths to I/O devices |
US5712976A (en) | 1994-09-08 | 1998-01-27 | International Business Machines Corporation | Video data streamer for simultaneously conveying same one or different ones of data blocks stored in storage node to each of plurality of communication nodes |
US6308247B1 (en) | 1994-09-09 | 2001-10-23 | International Business Machines Corporation | Page table entry management method and apparatus for a microkernel data processing system |
US5598541A (en) | 1994-10-24 | 1997-01-28 | Lsi Logic Corporation | Node loop port communication interface super core for fibre channel |
US5638518A (en) | 1994-10-24 | 1997-06-10 | Lsi Logic Corporation | Node loop core for implementing transmission protocol in fibre channel |
US5519695A (en) | 1994-10-27 | 1996-05-21 | Hewlett-Packard Company | Switch element for fiber channel networks |
US5621902A (en) | 1994-11-30 | 1997-04-15 | International Business Machines Corporation | Computer system having a bridge between two buses with a direct memory access controller and an alternative memory access controller |
GB2296798A (en) | 1995-01-05 | 1996-07-10 | Spring Consultants Limited | Storing data efficiently on a RAID |
US5743847A (en) | 1995-01-13 | 1998-04-28 | Olympus Optical Co., Ltd. | Stereoscopic endoscope having image transmitting optical-system and pupil dividing unit that are axially movable with respect to each other |
US5596562A (en) | 1995-01-19 | 1997-01-21 | United Microelectronics Corp. | Controlling method and apparatus for supporting hard disk and/or CD-ROM drives through the PCMCIA interface |
GB2297636A (en) | 1995-02-02 | 1996-08-07 | Spring Consultants Limited | Storing data on emulated, logical, removable, disc drives |
JPH08230895A (en) | 1995-02-28 | 1996-09-10 | Shuichi Higuchi | Grain storing bag |
US5581709A (en) | 1995-03-15 | 1996-12-03 | Mitsubishi Denki Kabushiki Kaisha | Multiple computer system using I/O port adaptor to selectively route transaction packets to host or shared I/O device |
US5659756A (en) | 1995-03-31 | 1997-08-19 | International Business Machines Corporation | Method and system for providing access to logical partition information on a per resource basis |
US5802278A (en) | 1995-05-10 | 1998-09-01 | 3Com Corporation | Bridge/router architecture for high performance scalable networking |
US5778411A (en) | 1995-05-16 | 1998-07-07 | Symbios, Inc. | Method for virtual to physical mapping in a mapped compressed virtual storage subsystem |
US5701491A (en) | 1995-05-31 | 1997-12-23 | Microsoft Corporation, Inc. | Method and system for transitioning the network mode of a workstation |
US5884027A (en) | 1995-06-15 | 1999-03-16 | Intel Corporation | Architecture for an I/O processor that integrates a PCI to PCI bridge |
US5935205A (en) | 1995-06-22 | 1999-08-10 | Hitachi, Ltd. | Computer system having a plurality of computers each providing a shared storage access processing mechanism for controlling local/remote access to shared storage devices |
US5751971A (en) | 1995-07-12 | 1998-05-12 | Cabletron Systems, Inc. | Internet protocol (IP) work group routing |
US5860137A (en) | 1995-07-21 | 1999-01-12 | Emc Corporation | Dynamic load balancing |
US5729705A (en) | 1995-07-24 | 1998-03-17 | Symbios Logic Inc. | Method and apparatus for enhancing throughput of disk array data transfers in a controller |
US6098128A (en) | 1995-09-18 | 2000-08-01 | Cyberstorage Systems Corporation | Universal storage management system |
US5768623A (en) | 1995-09-19 | 1998-06-16 | International Business Machines Corporation | System and method for sharing multiple storage arrays by dedicating adapters as primary controller and secondary controller for arrays reside in different host computers |
US5845722A (en) | 1995-10-09 | 1998-12-08 | Baker Hughes Incorporated | Method and apparatus for drilling boreholes in earth formations (drills in liner systems) |
US6141737A (en) | 1995-10-11 | 2000-10-31 | Citrix Systems, Inc. | Method for dynamically and efficiently caching objects received from an application server by a client computer by subdividing cache memory blocks into equally-sized sub-blocks |
US5748924A (en) | 1995-10-17 | 1998-05-05 | Methode Electronics, Inc. | Method and apparatus for transferring data from SCSI bus to serial device and from serial device to SCSI bus |
US5805920A (en) | 1995-11-13 | 1998-09-08 | Tandem Computers Incorporated | Direct bulk data transfers |
JPH09185594A (en) | 1995-11-13 | 1997-07-15 | Tandem Comput Inc | Direct bulk data transfer |
US5684800A (en) | 1995-11-15 | 1997-11-04 | Cabletron Systems, Inc. | Method for establishing restricted broadcast groups in a switched network |
US6147995A (en) | 1995-11-15 | 2000-11-14 | Cabletron Systems, Inc. | Method for establishing restricted broadcast groups in a switched network |
US5825772A (en) | 1995-11-15 | 1998-10-20 | Cabletron Systems, Inc. | Distributed connection-oriented services for switched communications networks |
US5946308A (en) | 1995-11-15 | 1999-08-31 | Cabletron Systems, Inc. | Method for establishing restricted broadcast groups in a switched network |
US5913045A (en) | 1995-12-20 | 1999-06-15 | Intel Corporation | Programmable PCI interrupt routing mechanism |
US5809328A (en) | 1995-12-21 | 1998-09-15 | Unisys Corp. | Apparatus for fibre channel transmission having interface logic, buffer memory, multiplexor/control device, fibre channel controller, gigabit link module, microprocessor, and bus control device |
US5751975A (en) | 1995-12-28 | 1998-05-12 | Intel Corporation | Method and apparatus for interfacing a device compliant to a first bus protocol to an external bus having a second bus protocol and for providing virtual functions through a multi-function intelligent bridge |
US6075863A (en) | 1996-02-28 | 2000-06-13 | Encanto Networks | Intelligent communication device |
US5727218A (en) | 1996-03-05 | 1998-03-10 | Unisys Corp. | Controlling an apparatus disposed for adapting fiber channel transmissions to an industry standard data bus |
WO1997033227A1 (en) | 1996-03-07 | 1997-09-12 | Nippon Telegraph And Telephone Corporation | High-speed batch file transfer method and apparatus, and storage medium in which a program for executing the transfer is stored |
US5974530A (en) | 1996-03-15 | 1999-10-26 | Adaptec, Inc. | Integrated PCI buffer controller and XOR function circuit |
US5978875A (en) | 1996-03-18 | 1999-11-02 | Kabushiki Kaisha Toshiba | Apparatus and method for scheduling use of bus |
JPH09251437A (en) | 1996-03-18 | 1997-09-22 | Toshiba Corp | Computer device and continuous data server device |
US5835496A (en) | 1996-04-30 | 1998-11-10 | Mcdata Corporation | Method and apparatus for data alignment |
JPH1097493A (en) | 1996-05-31 | 1998-04-14 | Sun Microsyst Inc | Method and device for giving bus controlling right |
EP0810530A2 (en) | 1996-05-31 | 1997-12-03 | Sun Microsystems, Inc. | A method and apparatus for passing bus mastership |
US5764931A (en) | 1996-05-31 | 1998-06-09 | Sun Microsystems, Inc. | Method and apparatus for passing bus mastership between processors using predefined bus mastership states |
US5881311A (en) | 1996-06-05 | 1999-03-09 | Fastor Technologies, Inc. | Data storage subsystem with block based data management |
US6147976A (en) | 1996-06-24 | 2000-11-14 | Cabletron Systems, Inc. | Fast network layer packet filter |
US5845107A (en) | 1996-07-03 | 1998-12-01 | Intel Corporation | Signaling protocol conversion between a processor and a high-performance system bus |
US5848251A (en) | 1996-08-06 | 1998-12-08 | Compaq Computer Corporation | Secondary channel for command information for fibre channel system interface bus |
US5889952A (en) | 1996-08-14 | 1999-03-30 | Microsoft Corporation | Access check system utilizing cached access permissions |
US5959994A (en) | 1996-08-19 | 1999-09-28 | Ncr Corporation | ATM/SONET network enhanced as a universal computer system interconnect |
US6118766A (en) | 1996-08-21 | 2000-09-12 | Godigital Networks Corporation | Multiple ISDN carrier system |
EP0827059A2 (en) | 1996-08-30 | 1998-03-04 | NEC Corporation | Disk apparatus |
US6219771B1 (en) | 1996-08-30 | 2001-04-17 | Nec Corporation | Data storage apparatus with improved security process and partition allocation functions |
US5857080A (en) | 1996-09-10 | 1999-01-05 | Lsi Logic Corporation | Apparatus and method for address translation in bus bridge devices |
US5812754A (en) | 1996-09-18 | 1998-09-22 | Silicon Graphics, Inc. | Raid system with fibre channel arbitrated loop |
US6081849A (en) | 1996-10-01 | 2000-06-27 | Lsi Logic Corporation | Method and structure for switching multiple contexts in storage subsystem target device |
US5867648A (en) | 1996-10-09 | 1999-02-02 | General Signal Corporation | High speed heterogeneous coupling of computer systems using channel-to-channel protocol |
US5774683A (en) | 1996-10-21 | 1998-06-30 | Advanced Micro Devices, Inc. | Interconnect bus configured to implement multiple transfer protocols |
US6453345B2 (en) | 1996-11-06 | 2002-09-17 | Datadirect Networks, Inc. | Network security and surveillance system |
US6202153B1 (en) | 1996-11-22 | 2001-03-13 | Voltaire Advanced Data Security Ltd. | Security switching device |
US6268789B1 (en) | 1996-11-22 | 2001-07-31 | Voltaire Advanced Data Security Ltd. | Information security method and apparatus |
US6073218A (en) | 1996-12-23 | 2000-06-06 | Lsi Logic Corp. | Methods and apparatus for coordinating shared multiple raid controller access to common storage devices |
US6108684A (en) | 1996-12-23 | 2000-08-22 | Lsi Logic Corporation | Methods and apparatus for balancing loads on a storage subsystem among a plurality of controllers |
US5933824A (en) | 1996-12-23 | 1999-08-03 | Lsi Logic Corporation | Methods and apparatus for locking files within a clustered storage environment |
US5864653A (en) | 1996-12-31 | 1999-01-26 | Compaq Computer Corporation | PCI hot spare capability for failed components |
US6070253A (en) | 1996-12-31 | 2000-05-30 | Compaq Computer Corporation | Computer diagnostic board that provides system monitoring and permits remote terminal access |
US5978379A (en) | 1997-01-23 | 1999-11-02 | Gadzoox Networks, Inc. | Fiber channel learning bridge, learning half bridge, and protocol |
WO1998036357A1 (en) | 1997-02-05 | 1998-08-20 | Transwitch Corporation | Shared memory control using multiple linked lists with pointers, status flags, memory block counters and parity |
US6185203B1 (en) | 1997-02-18 | 2001-02-06 | Vixel Corporation | Fibre channel switching fabric |
US6118776A (en) | 1997-02-18 | 2000-09-12 | Vixel Corporation | Methods and apparatus for fiber channel interconnection of private loop devices |
US6529996B1 (en) | 1997-03-12 | 2003-03-04 | Storage Technology Corporation | Network attached virtual tape data storage subsystem |
US6073209A (en) | 1997-03-31 | 2000-06-06 | Ark Research Corporation | Data storage controller providing multiple hosts with access to multiple storage subsystems |
US6363462B1 (en) | 1997-03-31 | 2002-03-26 | Lsi Logic Corporation | Storage controller providing automatic retention and deletion of synchronous back-up data |
US6131119A (en) | 1997-04-01 | 2000-10-10 | Sony Corporation | Automatic configuration system for mapping node addresses within a bus structure to their physical location |
US6000020A (en) | 1997-04-01 | 1999-12-07 | Gadzoox Networks, Inc. | Hierarchical storage management from a mirrored file system on a storage network segmented by a bridge |
US5953511A (en) | 1997-04-08 | 1999-09-14 | National Instruments Corporation | PCI bus to IEEE 1394 bus translator |
US5935260A (en) | 1997-05-02 | 1999-08-10 | Emc Corporation | Method and apparatus for providing system level errors in a large disk array storage system |
US6484245B1 (en) | 1997-05-29 | 2002-11-19 | Hitachi, Ltd. | Apparatus for and method of accessing a storage region across a network |
US6173399B1 (en) | 1997-06-12 | 2001-01-09 | Vpnet Technologies, Inc. | Apparatus for implementing virtual private networks |
US6098149A (en) | 1997-06-13 | 2000-08-01 | Emc Corporation | Method and apparatus for extending commands in a cached disk array |
US6145006A (en) | 1997-06-25 | 2000-11-07 | Emc Corporation | Method and apparatus for coordinating locking operations of heterogeneous host computers accessing a storage subsystem |
US5923557A (en) | 1997-08-01 | 1999-07-13 | Hewlett-Packard Company | Method and apparatus for providing a standard interface to process control devices that are adapted to differing field-bus protocols |
US6223266B1 (en) | 1997-08-20 | 2001-04-24 | Cypress Semiconductor Corp. | System and method for interfacing an input/output system memory to a host computer system memory |
US6041058A (en) | 1997-09-11 | 2000-03-21 | 3Com Corporation | Hardware filtering method and apparatus |
US6055603A (en) | 1997-09-18 | 2000-04-25 | Emc Corporation | Method and apparatus for performing pre-request operations in a cached disk array storage system |
US5941969A (en) | 1997-10-22 | 1999-08-24 | Auspex Systems, Inc. | Bridge for direct data storage device access |
US5991797A (en) | 1997-12-23 | 1999-11-23 | Intel Corporation | Method for directing I/O transactions between an I/O device and a memory |
US5941972A (en) | 1997-12-31 | 1999-08-24 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
WO1999034297A1 (en) | 1997-12-31 | 1999-07-08 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
US6425036B2 (en) | 1997-12-31 | 2002-07-23 | Crossroads System, Inc | Storage router and method for providing virtual local storage |
US6425035B2 (en) | 1997-12-31 | 2002-07-23 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
US20060218322A1 (en) | 1997-12-31 | 2006-09-28 | Hoese Geoffrey B | Storage router and method for providing virtual local storage |
US6421753B1 (en) | 1997-12-31 | 2002-07-16 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
US6029168A (en) | 1998-01-23 | 2000-02-22 | Tricord Systems, Inc. | Decentralized file mapping in a striped network file system in a distributed computing environment |
US6041381A (en) | 1998-02-05 | 2000-03-21 | Crossroads Systems, Inc. | Fibre channel to SCSI addressing method and system |
US6148004A (en) | 1998-02-11 | 2000-11-14 | Mcdata Corporation | Method and apparatus for establishment of dynamic ESCON connections from fibre channel frames |
US6134617A (en) | 1998-04-03 | 2000-10-17 | Lsi Logic Corporation | Method and apparatus for managing access to a loop in a data processing system |
US6209023B1 (en) | 1998-04-24 | 2001-03-27 | Compaq Computer Corporation | Supporting a SCSI device on a non-SCSI transport medium of a network |
US6065087A (en) | 1998-05-21 | 2000-05-16 | Hewlett-Packard Company | Architecture for a high-performance network/bus multiplexer interconnecting a network and a bus that transport data using multiple protocols |
US6260120B1 (en) | 1998-06-29 | 2001-07-10 | Emc Corporation | Storage mapping and partitioning among multiple host processors in the presence of login state changes and host controller replacement |
US6243827B1 (en) | 1998-06-30 | 2001-06-05 | Digi-Data Corporation | Multiple-channel failure detection in raid systems |
US6032269A (en) | 1998-06-30 | 2000-02-29 | Digi-Data Corporation | Firmware recovery from hanging channels by buffer analysis |
GB2341715A (en) | 1998-09-17 | 2000-03-22 | Springtek Limited | Magnetic disk redundant array |
US6230218B1 (en) | 1998-10-14 | 2001-05-08 | International Business Machines Corporation | Apparatus for transferring execution of certain channel functions to a control unit and having means for combining certain commands and data packets in one sequence |
US6330687B1 (en) | 1998-11-13 | 2001-12-11 | Digi-Data Corporation | System and method to maintain performance among N single raid systems during non-fault conditions while sharing multiple storage devices during conditions of a faulty host computer or faulty storage array controller |
US6341315B1 (en) | 1999-02-26 | 2002-01-22 | Crossroads Systems, Inc. | Streaming method and system for fiber channel network devices |
US6401170B1 (en) | 1999-08-18 | 2002-06-04 | Digi-Data Corporation | RAID systems during non-fault and faulty conditions on a fiber channel arbitrated loop, SCSI bus or switch fabric configuration |
US6343324B1 (en) | 1999-09-13 | 2002-01-29 | International Business Machines Corporation | Method and system for controlling access share storage devices in a network environment by configuring host-to-volume mapping data structures in the controller memory for granting and denying access to the devices |
US6425052B1 (en) | 1999-10-28 | 2002-07-23 | Sun Microsystems, Inc. | Load balancing configuration for storage arrays employing mirroring and striping |
US6775693B1 (en) | 2000-03-30 | 2004-08-10 | Baydel Limited | Network DMA method |
US7216225B2 (en) | 2000-05-24 | 2007-05-08 | Voltaire Ltd. | Filtered application-to-application communication |
US7127668B2 (en) | 2000-06-15 | 2006-10-24 | Datadirect Networks, Inc. | Data management architecture |
US7065076B1 (en) | 2000-08-25 | 2006-06-20 | Promise Technology, Inc. | Modular scalable switching networks |
US6874043B2 (en) | 2000-10-17 | 2005-03-29 | Bridgeworks Ltd. | Data buffer |
US20020083221A1 (en) | 2000-11-01 | 2002-06-27 | Accusys, Inc. | Universal disk array controller |
US6792602B2 (en) | 2000-12-20 | 2004-09-14 | Promise Technology, Inc. | Method and device of controlling external system parameters using ATA side band |
US6820212B2 (en) | 2001-02-20 | 2004-11-16 | Digi-Data Corporation | RAID system having channel capacity unaffected by any single component failure |
USD470486S1 (en) | 2001-07-09 | 2003-02-18 | Promise Technology, Inc. | Cassette box for hard disk |
US6874100B2 (en) | 2001-07-12 | 2005-03-29 | Digi-Data Corporation | Raid system with multiple controllers and proof against any single point of failure |
US6560750B2 (en) | 2001-07-27 | 2003-05-06 | Promise Technology Inc. | Method for providing master-slave heat-swapping apparatus and mechanism on a mono-ATA bus |
US7251248B2 (en) | 2001-07-31 | 2007-07-31 | Bridgeworks Ltd. | Connection device |
US6563701B1 (en) | 2001-09-17 | 2003-05-13 | Promise Technology Inc. | Structure for hard disk drawing box |
US6547576B2 (en) | 2001-09-17 | 2003-04-15 | Promise Technology Inc. | Power source connector assembly for an extractable hard drive box |
US6862637B1 (en) | 2002-03-30 | 2005-03-01 | Iqstor Networks | Method and system for locating devices over a serial bus |
US7188111B2 (en) | 2002-07-12 | 2007-03-06 | Datadirect Technologies Corp. | System and method for connectivity to structured query language database |
US6910083B2 (en) | 2003-06-26 | 2005-06-21 | Promise Technology, Inc. | Method for detecting channels of a host to which hard disk controllers belong |
US6854027B2 (en) | 2003-06-26 | 2005-02-08 | Promise Technology, Inc. | Hard disk device capable of detecting channels of a host to which hard disk controllers belong |
US7281072B2 (en) | 2003-07-02 | 2007-10-09 | Infortrend Technology, Inc. | Redundant external storage virtualization computer system |
US7133965B2 (en) | 2003-12-15 | 2006-11-07 | Promise Technology, Inc. | Raid storage device |
US20060277326A1 (en) | 2005-06-06 | 2006-12-07 | Accusys, Inc. | Data transfer system and method |
US20060294416A1 (en) | 2005-06-22 | 2006-12-28 | Accusys, Inc. | XOR circuit, raid device capable of recovering a plurality of failures and method thereof |
Non-Patent Citations (200)
Title |
---|
"InfoServer 150-Installation and Owner's Guide", EK-INFSV-OM-001, Digital Equipment Corporation, Maynard, Massachusetts 1991, Chapters 1 and 2. |
Adaptec MCS ESS Presents: Intelligent External I/O Raid Controllers "Bridge" Strategy (Lavan Ex 9 (CNS 178606-638)). (CD-ROM Chaparral Exhibits D029), Feb. 6, 1996. |
Adaptec Schematics re AAC-340 (Kalwitz Ex 14 CNS 177215-251)) (CD-ROM Chaparral Exhibits D057). |
AEC Bridge Series Products-Adaptec External Controller RAID Products Pre-Release Draft, v.6 (Manzanares Ex 4 (CNS 174632-653)). (CD-ROM Chaparral Exhibits D059), Oct. 28, 1997. |
AEC-. 4412B, AEC-7412/B2 External Raid Controller Hardware 0EM Manual, Revision 2.0 (Lavan Ex 15 (CNS 177082-123)) (CD-ROM Chaparral Exhibits D035), Jun. 27, 1997. |
AEC-4412B, AEC7412/3B External RAID Controller Hardware 0EM Manual, Revision 3.0. (Lavan Ex 17 (CNS 177124-165)) (CD-ROM Chaparral Exhibits D037), Aug. 25, 1997. |
AEC-4412B, AEC7412/3B External RAID Controller Hardware OEM Manual, Revision 3.0. (Lavan Ex 17 (CNS 177124-165)) (CD-ROM Chaparral Exhibits D037), Aug. 25, 1997. |
AEC-4412B/7412B User's Guide, Rev. A (Lavan Ex 21) (CD-ROM Chaparral Exhibits D041), Jun. 19, 1905. |
AEC-7313 Fibre Channel Daughter Board (for Brooklyn) Engineering Specification, Revision 1.0 (Lavan Ex 10 (CNS 176830-850)) (CD-ROM Chaparral Exhibits D030), Feb. 27, 1997. |
American National Standard for Information Systems: Fibre Channel—Cross-Point Switch Fabric Topology (FC-XS); X3T11/Project 959D/Rev 1.30. 114 pgs, Jun. 17, 1994. |
American National Standard for Information Technology—Fibre Channel Protocol for SCSI. AnSI X3.269-1996, 1996. |
ANSI TR X3.xxx-199x, Revision 9 of X3-991D. Draft Proposed X3 Technical Report—Small Computer System Interface—3 Generic Packetized Protocol (SCSI-GPP). Computer and Business Equipment Manufacturers Assoc. |
APT Technologies, Inc., "Serial ATA: High Speed Serialized AT Attachment", Rev. 1.0a, pp. 1-310, Jan. 7, 2003. |
Attendees/Action Items from Apr. 12, 1996 Meeting at BTC (Lavan Ex 3 (CNS 182241)) (CD-ROM Chaparral Exhibits D023). |
Bill of Material (Kalwitz Ex 2 (CNS 181632-633)) (CD-ROM Chaparral Exhibits D054), Mar. 17, 1997. |
Bill of Material (Lavan Ex 14 (CNS 177211-214)) (CD-ROM Chaparral Exhibits D034), Jul. 24, 1997. |
Black Box, SCSI Fiberoptic Extender, Single-Ended, Product Insert, 2 pages, 1996, Jun. 18, 1905. |
Block-Based Distributed File Systems, Anthony J. McGregor, Jul. 1997. |
Brian Allison's 1999 Third Quarter Sales Plan (PDX 38 )CNS 022120-132)) (CD-ROM Pathlight Exhibits D201), Jun. 5, 2001. |
Brian Allison's 1999 Third Quarter Sales Plan (PDX38)CNS 022120-132)) (CD-ROM Pathlight Exhibits D201), Jun. 5, 2001. |
Bridge Phase II Architecture Presentation (Lavan Ex 2 (CNS 182287-295)) (CD-ROM Chaparral Exhibits D022), Apr. 12, 1996. |
Bridge Product Line Review (Manzanares Ex 3 (CNS 177307-336)) (CD-ROM Chaparral Exhibits D058). |
Bridge. C, Bridge Between SCSI-2 and SCSI-3 FCP (Fibre Channel Protocol) (CD-ROM Chaparral Exhibits P214). |
Bridge. C. Bridge Between SCSI-2 and SCSI-3 FCP (Fibre Channel Protocol) (CD-ROM Chaparral Exhibit p. 214). |
Brooklyn Hardware Engineering Requirements Document, Revision 1.4 (Lavan Ex 4 (CNS 178188-21)) (CD-ROM Chaparral Exhibits D024) by Pecone, May 26, 1996. |
Brooklyn Hardware Engineering Requirements Documents, Revision 1.4 (Lavan Ex 4 (CNS 178188-211)) (CD-ROM Chaparral Exhibits D024) by Pecone, May 26, 1996. |
Brooklyn Main Board (AES-0302) MES Schedule (Lavan Ex 19 (CNS 177759-763)) (CD-ROM Chaparral Exhibits D039), Feb. 11, 1997. |
Brooklyn SCSI-SCSI Intelligent External RAID Bridge Definition Phase External Documentation ((CD-ROM Pathlight Exhibits D129). |
Brooklyn Single-Ended SCSI Raid Bridge Controller Hardware OEM Manual, Revision 2.1 (Lavan Ex 5 (CNS 177169-191)) (CD-ROM Chaparral Exhibits D025), Mar. 2, 1996. |
C++ SourceCode for the SCSI Command Handler (Davies Ex 5 (CNS 179136-168)) (CD-ROM Chaparral Exhibits D050), Aug. 8, 1996. |
Chen, et al. "A Fibre Channel-Based Architecture for Internet Multimedia Server Clusters", pp. 437-450. Dec. 12, 1997. |
Compaq StorageWorks HSG80 Array Controller ACS Version 8.3 (Configuration and CLI Reference Guide) Nov. 1998. |
Compaq StorageWorks HSG80 Array Controller ACS Version 8.3 (Maintenance and Service Guide) Nov. 1998. |
Coronado Hardware Engineering Requirements Document, Revision 0.0 (Lavan Ex 7 (CNS 176917-932)) (CD-ROM Chaparral Exhibits D027) by O'Dell, Sep. 30, 1996. |
Coronado II, AEC-7312A Fibre Channel Daughter (for Brooklyn) Hardware Specification, Revision 1.2 (Lavan Ex 16 (CNS 177192-210)) (CD-ROM Chaparral Exhibits D036) by Tom Yang, Jul. 18, 1997. |
Coronado: Fibre Channel to SCSI Intelligent Raid Controller Product Brief (Kalwitz Ex I (CNS 182804-805)) (CD-ROM Chaparral Exhibits D053). |
CR4x00 Product Specification (CRDS 43929) (CD-ROM Chaparral Exhibits P267), Jun. 1, 1998. |
CRD-5500, Raid Disk Array Controller Product Insert, pp. 1-5. |
CRD-5500, SCSI Raid Controller OEM Manual, Rev. 1.3, Feb. 26, 1996, pp. 1-54. |
CRD-5500, SCSI Raid Controller Users Manual, Rev. 1.3, Nov. 21, 1996, pp. 10-92. |
CrossPoint 4100 Fibre Channel to SCSI Router Preliminary Datasheet (Hulsey Ex 9 (CRDS 16129-130)) (CD-ROM Chaparral Exhibits D145), Nov. 1, 1996. |
CrossPoint 4100 Fibre Channel to SCSI Router Preliminary Datasheet (Quisenberry) Ex 3 (CRDS 4933-34) (CD-ROM Chaparral Exhibits D166) (CD-ROM Chaparral Exhibits D166). |
CrossPoint 4400 Fibre Channel to SCSI Router Preliminary Datasheet (Bardach Ex. 9, Quisenberry Ex 33 (CRDS 25606-607)) (CD-ROM Chaparral Exhibits D153), Nov. 1, 1996. |
CrossPoint 4400 Fibre to Channel to SCSI Router Preliminary Datasheet; Crossroads Company and Product Overview (Quisenberry Ex 4 (CRDS 25606; 16136)) (CD-ROM Chaparral Exhibits D167). |
Crossroads Purchase Order Log (Quisenberry Ex 9 (CRDS 14061-062)) (CD-ROM Chaparral Exhibits D172). |
Data Book- AIC-1160 Fibre Channel Host Adapter ASIC (Davies Ex 2 (CNS 181800-825)) (CD-ROM Chaparral Exhibits D047), Jun. 18, 1905. |
Data Book- AIC-7895 PCI Bus Master Single Chip SCSI Host Adapter (Davies Ex 1 (CNS 182944-64)) (CD-ROM Chaparral Exhibits D046), May 21, 1996. |
Datasheet for CrossPoint 4100 Fibre Channel to SCSI Router (Dedek Ex 41 (ANCT 117-120)) (CD-ROM Chaparral Exhibits D012). |
Defendant's First Supplemental Trial Exhibit List, Crossroads Systems, Inc., v. Chaparral Network Storage, Inc., C.A. No. A-00CA-217-SS (W.D. Tex. 2001). (CD-Rom). |
Defendant's Third Supplemental Trial Exhibit List, Crossroads Systems, Inc. v. Pathlight Technology, Inc., C.A. No. A-00CA-248-SS (W.D. Tex. 2001) (CD-Rom). |
Digital "Software Product Description", SSA 40.78.01, AE-PNZJB-TE, pp. 1-3, Apr. 1, 1993. |
Digital "System Support Addendum", SSA 40.78.01-A, AE-PNZJB-TE, pp. 1-3, Apr. 1, 1993. |
Digital Delivers Industry-Leading Enterprise-Class Storage Solutions. StorageWorks Family Provides Easiest Path to Fibre Channel. Three pages by Company News Oncall dated Sep. 9, 2004. |
Digital Equipment Corporation, "InfoServer 100 Installation and Owner's Guide", Order No. EK-DIS1K-IN-001, First Edition, Oct. 1, 1990. |
Digital Equipment Corporation, "InfoServer 100 System Operation Guide", Order No. EK-DIS1K-UG-001, First Edition, pp. i-Index 5, Oct. 1, 1990. |
Digital Storage Works, HSZ70 Array Controller, HSOF Version 7.0 EK-HSZ70-CG. A01, Digital Equipment Corporation, Maynard, Massachusetts, Jul. 1, 1997. |
Digital StorageWorks HSG80 Array Controller ACS Version 8.0 (User's Guide Jan. 1998. |
Digital StorageWorks HSZ70 Array Controller HSOF Version 7.0 EK-HSZ70-SV. A01, 1997. |
Digital StorageWorks HSZ70 Array Controller HSOF Version 7.0 EK-SHZ70-RM.A01 CLI Reference Manual, Jul. 1, 1997. |
Digital StorageWorks, Using Your HSZ70 Array Controller in a SCSI Controller Shelf (DS-BA356-M Series), User's Guide, pp. 1-1 through A-5 with index, Jan. 1, 1998. |
Digitial StorageWorks HSZ270 Array Controller HSOF Version 7.0 EK-HSZ70-SV. A01, 1997. |
Distribution Agreement Between Hewlett-Packard and Crossroads (Dunning Ex 15 (HP 326-33) (CD-ROM Chaparral Exhibits D079). |
DP5380 Asynchronous SCSI Interface, National Semiconductor Corporation, Arlington, TX, May 1989, pp. 1-32. |
Draft Proposed American National Standard. X3.269-199X, Revision 012. Information System—dpANS Fibre Channel Protocol fo SCSI, Dec. 4, 1995. |
Draft Proposed X3 Technical Report—Small Computer System Interface—Generic Packetized Protocol (SCSI-GPP), Computer and Business Equipment Manufactures Association. |
Elliott, Working Draft American National Standard, Project T10/1562-D, Revision 5, pp. i-432, Jul. 9, 2003. |
Email Dated Dec. 20, 1996 from J. Boykin to B. Smith re: Purchase Order for Betas in February And March (Hoese Ex 16, Quisenberry Ex 25; Bardach Ex 12 (CRDS 13644-650) (CD-ROM Chaparral Exhibits D156). |
Emails Date Jan. 13-Mar. 31, 1997 from P. Collins to Mo re: Status Reports (Kalwitz Ex 3 (CNS 182501-511)) (CD-ROM Chaparral Exhibits D055). |
Emails Dated Jan. 13-Mar. 31, 1997 from P. Collins to Mo re: Status Reports (Kalwitz Ex 3 (CNS 182501-511)) (CD-ROM Chaparral Exhibits D055). |
Emerson, "Encor Communications: Performance evaluation of switched fibre channel I/O system using-FCP for SCSI" Feb. 1995, IEEE, pp. 479-484, Feb. 1, 1995. |
English Translation of Japanese Laid-Open Publication No. 5-181609. 9 pgs, Jul. 23, 1993. |
English Translation of Japanese Laid-Open Publication No. 7-20994. 57 pgs, Jan. 24, 1995. |
Enterprise Systems Connection (ESCON) Implementation Guide, IBM Technical Support Organization, Poughkeepsie Center, Jul. 1996. |
Enterprise Systems Connection (ESON) Implementation Guide, Jul. 1, 1996, IBM International Technical Support Organization, Poughkeepsie Center. |
ESS/FPG Organization (Lavan Ex 8 (CNS 178639-652)) (CD-ROM Chaparral Exhibits D028), Dec. 6, 1996. |
European Office Action issued Apr. 1, 2004 in Application No. 98966104.6-2413. |
F1710 File Control Unit (FCU) Logical Specifications. 11 Pages, Dec. 9, 1997. |
F1710 Logic Specification. |
F1710A File Control Unit and F6493 Array Disk Subsystem by Hitoshi Matsushima, Shojiro Okada and Tetsuro Kudo, Feb. 3, 1995. |
Fax Dated Dec. 19, 1996 from B. Bardach to T. Rarich re: Purchase Order Information (Bardach Ex. 14; Smith Ex 16 (CRDS 4460)) (CD-ROM Chaparral Exhibits D158). |
Fax Dated Jul. 22, 1996 from L. Petti to B. Smith re: Purchase Order from Data General for FC2S Fibre to Channel SCSI Protocol Bridge Model 11 (Smith Ex 25; Quisenberry Ex 23; Bardach Ex 11 (CRDS 8552-55; 8558) (CD-ROM Chaparral Exhibits D155). |
Fiber channel (FCS)/ATM internetworking: a design solution. |
Fiber Channel and ATM: The Physical Layers Quam WESCON/94, published Sep. 27-29, 1994. pp. 648-652. |
Fiber Channel storage interface for video-on-demand servers by Anazaloni, et al., Jun. 15, 1905. |
Fibre Channel and ATM: The Physical Layers, Jerry Quam WESCON/94, published Sep. 27-29, 1994. pp. 648-652. |
For Information Technology—Fibre Channel Protocol for SCSI, American National Standard, Apr. 8, 1996. |
Gen5 S-Series XL System Guide Revision 1.01 by Chen, Jun. 18, 1905. |
Gen5 S-Series XL System Guide Revision 1.01 by Chen. Jun. 18, 1905. |
Graphical User Interface for MAXSTRAT Gen5/Gen-S Servers User's guide 1.1, Jun. 11, 1996. |
Hardware Schematics for the Fibre Channel Daughtercard Coronado (Kalwitz Ex 4 (CNS 181639-648)) (CD-ROM Chaparral Exhibits D056). |
Header File Data Structure (Davies Ex 6 (CNS 179997-180008)) (CD-ROM Chaparral Exhibits D051) Jan. 2, 1997. |
Header File with Structure Definitions (Davies Ex 4 (CNS 180009-018)) (CD-ROM Chaparral Exhibits D049), Aug. 8, 1996. |
Hewlett-Packard Roseville Site Property Pass for Brian Smith (Dunning Ex 14 (HP 489) (CD-ROM Chaparral Exhibits D078), Nov. 7, 1996. |
High Performance Data transfers Using Network-Attached Peripherals at the national Storage Laboratory by Hyer, Feb. 26, 1993. |
HPFC-5000 Tachyon User's Manuel, First Edition (PTI 172419-839) (CD-ROM Chaparral Exhibits D084), May 1, 1996. |
IBM Technical Publication: Guide to Sharing and Partitioning IBM Tape Library Dataservers, Nov. 1996, pp. 1-256, Nov. 1, 1996. |
IBM Technical Publication: Magstar and IBM 3590 High Performance Tape Subsystem Technical Guide, Nov. 1996, pp. 1-269, Nov. 1, 1996. |
IBM Technical Publication: Magstar and IBM.3590 High Performance Tape Subsystem Technical Guide, pp. 1-269, Nov. 1, 1996. |
IFT-3000 SCSI to SCSI Disk array Controller Instruction Manual Revision 2.0 by Infotrend Technologies, Inc., 1995. |
Impactdata Launches Breakthrough Architecture for Network Storage, Nov. 13, 1996. |
Impactdata..News Release: Breece Hill Libraries Now Able to Attach Directly to High Speed Networks Peripheral Adapter from Impactdata. 2 Pages, Nov. 20, 1996. |
Impactdata..News Release: Impactdata and Storage Concepts Announce Integration of FibreRAID II Storage Solution with Impactdata's Distributed Storage Node Architecture (DSNA). 2 pages, Nov. 18, 1996. |
Impactdata..News Release: Impactdata Introduces New Storage Architecture for High Performance Computing. 2 Pages, Nov. 12, 1996. |
Impactdata..News Release: Impactdata's Network Peripheral Adapter (NPA) Pushes Technology Envelope of Data Storage Management in High-Speed Computing Environments. 2 Pages, Nov. 12, 1996. |
Impactdata—Corporate Fact Sheet. 1 Page. |
Impactdata—CPI (Common Peripheral Interfae). 2 Pages. |
Impactdata—DS-50. 2 Pages. |
Impactdata—DSNA (Distributed Storage Node Architecture) Protocol. 2 Pages. |
Impactdata—DSNA Distributed Storage Node Architecture "Reference Guide". 44 Pages. |
Impactdata—DSNA Questions and Answers. 22 Pages. |
Impactdata—Network Storage Solutions. 4 pages. |
Impactdata—NPA (Network Peripheral Interface). 4 Pages. |
Impactdata—SNC (Storage Node Controller). 2 Pages. |
Impactdata—White Paper: Distributed Storage Node Architecture (DSNA). Jan. 1997. |
Implementing a Fibre Channel SCSI transport by Snively, 1994-. |
Infinity Commstor Fibre Channel Demo for Fall Comdex, 1996 (Hoese Ex 15, Bardach Ex 13 (CRDS 27415) (CD-ROM Chaparral Exhibits D157). |
iNFOsERVER 100 Installation and Owner's Guide, Order No. EK-DIS1K-IN-001. |
InfoServer 100 System Operation Guide, Order No. EK-DIS1K-UG-001. |
Infoserver 100 System Operations Guide, First Edition Digital Equipment Corporation, 1990. |
InfoServer 150VXT Photograph. |
Johnson, D.B., et al., The Peregrine High Performance RPC System, Software-Practice and Experience, 23(2):201-221, Feb. 1993. |
Johnson, D.B., et al., The Peregrine High Performance RPC System. |
Letter dated Jul. 12, 1996 from J. Boykin to B. Smith re: Purchase Order for Evaluation Units from Crossroads (Smith Ex 24) CRDS 8556-57) (CD-ROM Chaparral Exhibits D144). |
Letter dated May 12, 1997 from Alan G. Leal to Barbara Bardach enclosing the original OEM License and Purchase Agreement between Hewlett-Package Company and Crossroads Systems, Inc. (CRDS 02057) (CD-ROM Chaparral Exhibits P130). |
Local-Area networks for the IBM PC by Haugdahl. |
Memo Dated Aug. 15, 1997 to AEC-7312A Evaluation Unit Customers re: B001 Release Notes (Lavan Ex 18 (CNS 182878-879)) (CD-ROM Chaparral Exhibits D038). |
Misc. Reference Manual pages, SunOS 5.09. |
Miscellaneous Documents Regarding Comdex (Quisenberry Ex 2 (CRDS 27415-465)) (CD-ROM Chaparral Exhibits D165). |
Network Storage Building Blocks. 2 Pages. |
New serial I/Os speed storage subsystems by Bursky, Feb. 6, 1995. |
News Release-Adaptec Adds Fibre Channel Option to its External RAID Controller Family (Lavan Ex 20 (CNS 182932-934)) (CD-ROM Chaparral Exhibits D040), May 6, 1997. |
Nondisclosure Agreement Between Adaptec and Crossroads Dated Oct. 17, 1996 (Quisenberry Ex 25 (CRDS 8196)) (CD-ROM Chaparral Exhibits D020). |
OEM Datasheet on the 3701 Controller (Engelbrecht 13 (LSI 01837-38)) (CD-ROM Chaparral Exhibits D017), Jun. 17, 1905. |
Office Action dated Aug. 11, 2000 for U.S. Appl. No. 09/354,682. |
Office Action dated Dec. 16, 1999 for U.S. Appl. No. 09/354,682. |
Office Action dated Feb. 27, 2001 for U.S. Appl. No. 09/354,682. |
Office Action dated Feb. 6, 2007 from the Japanese Patent Office regarding related application No. 526873/2000. |
Office Action dated Jan. 21, 2003 for U.S. Appl. No. 10/081,110. |
Office Action dated Jan. 21, 2003 for U.S. Appl. No. 10/174,720. |
Office Action dated Jan. 27, 2005 in U.S. Appl. No. 10/658,163. |
Office Action dated Nov. 6, 2002 for U.S. Appl. No. 10/023,786. |
Office Action in Ex Parte Reexamination U.S. Appl. No. 90/007,123, mailed Feb. 7, 2005. |
Office Action in Ex Parte Reexamination U.S. Appl. No. 90/007,124, mailed Feb. 7, 2005. |
Office Action in Ex Parte Reexamination U.S. Appl. No. 90/007,125, mailed Feb. 7, 2005. |
Office Action in Ex Parte Reexamination U.S. Appl. No. 90/007,126, mailed Feb. 7, 2005. |
Office Action in Ex Parte Reexamination U.S. Appl. No. 90/007,127, mailed Feb. 7, 2005. |
Office Action issued in U.S. Appl. No. 11/851,837 dated Dec. 22, 2008, Hoese, 7 pages. |
Office Action Mailed Aug. 17, 2010 in U.S. Appl. No. 11/947,499 to Hoese. 6 pgs. |
Office Action Mailed Dec. 2, 2010 in U.S. Appl. No. 12/910,375. |
Office Action Mailed Dec. 3, 2010 in U.S. Appl. No. 12/910,431. |
Office Action Mailed Dec. 3, 2010 in U.S. Appl. No. 12/910,515. |
Office Action Mailed Sep. 10, 2010 in U.S. Appl. No. 12/690,592. |
Office Action Mailed Sep. 13, 2010 in U.S. Appl. No. 11/980,909. |
Office Action Mailed Sep. 13, 2010 in U.S. Appl. No. 12/552,807. |
Office Action mailed Sep. 15,2010 in U.S. Appl. No. 12/552,885. |
Office Action Mailed Sep. 23, 2010 in U.S. Appl. No. 12/552,913. |
Organizational Presentation on the External Storage Group (Lavan Ex 1 (CNS 182242-255)) (CD-ROM Chaparral Exhibits D021), Apr. 11, 1996. |
Petal: Distributed Virtual Disks, Edward K. Lee and Chandramohan A. Thekkah, ACM SIGPLAN Notices, vol. 31, Issue 9. Sep. 1996. pp. 84-92. |
Petal: Distributed Virtual Disks, Edward K. Lee and Chandramohan A. Thekkath, ACM SIGPLAN Notices, vol. 31, Issue 9, Sep. 1996, pp. 84-92. |
Pictures of internal components of the InfoServer 150, taken from http://bindarydinosaurs.couk/Museum/Digital/infoserver/infoserver.php in Nov. 2004. |
Plaintiffs Fourth Amended Trail Exhibit List, Crossroads Systems, Inc. v. Chaparral Network Storage, Inc, C.A. No. A-00CA-217-SS (W.D. Tex. 2001) (CD-Rom). |
Plaintiff's Revised Trial Exhibit List, Crossroads Systems, Inc. v. Pathlight Technology, Inc., C.A. No. A-00CA-248-SS (W.D. Tex. 2001). (CD-Rom). |
Plantiff's Fourth Amended Trial Exhibit List, Crossroads Systems, Inc. v. Chaparral Network Storage, Inc. C.A. No. A-00CA-217-SS (W.D. Tex. 2001) (CD-Rom). |
Plantiff's Revised Trial Exhibit List, Crossroads Systems, Inc. v. Pathlight Technology, Inc., C.A. A-00CA-248-SS (W.D. Tex. 2001), (CD-Rom). |
Preliminary Product Literature for Infinity Commstor's Fibre Channel to SCSI Protocol Bridge (Smith Ex 11; Quisenberry Ex 31 (SPLO 428-30) (CD-ROM Chaparral Exhibits D143), Aug. 19, 1996. |
Press Release- Symbios Logic to Demonstrate Strong Support for Fibre Channel at Fall Comdex (Engelbrecht 12 (LSI 2785-86)) (CD-ROM Chaparral Exhibits D016), Nov. 13, 1996. |
Questioning Mailed Jun. 8, 2010 from JP Patent Application 526873/2000. 8 pages. |
RAID Manager 5 with RDAC 5 for UNIX V.4 User's Guide (LSI-01854) (CD-ROM Chaparral Exhibits P062), Sep. 1, 1996. |
Raider-5 "Disk Array Manual for the UltraSCSI Controller". Part No. 261-0013-002. 191 Pages. |
Raidtec FibreArray and Raidtec FlexArray UltraRAID Systems, Windows IT PRO Article, Oct. 1997. |
Report of the Working Group on Storage I/O for Large Scale Computing; Department of Computer Science Duke University: CS-1996-21 (PTI 173330-347). (CD-ROM Pathlight Exhibits D098). |
S.P. Joshi, "Ethernet controller chip interfaces with variety of 16-bit processors," electronic Design, Hayden Publishing Co., Inc., Rochelle Partk, NJ, Oct. 14, 1982. pp. 193-200. |
S.P. Joshi, "Ethernet controller chip interface with variety of 16-bit processors," electronic Design, Hayden Publishing Co., Inc., Rochelle Partk, NJ, Oct. 14, 1982. pp. 193-200. |
Satran, "Standards-Track," May 2001, iSCSI, pp. 9-87, Nov. 1, 2000. |
Satran, et al. IPS Internet Draft, iSCSI, pp. 1-8, Nov. 1, 2000. |
SCSI Applications on Fibre Channel by Robert Snively, p. 104-113, 1992. |
SCSI Command Handler (Davies Ex 7 (CNS 179676-719)) (CD-ROM Chaparral Exhibits D052), Jan. 2, 1997. |
Search Report and Written Opinion issued for European Patent Application 10 012 768.7-2413, 4 pgs. Jun. 10, 2011. |
Search Report and Written Opinion issued for European Patent Application 10 012 770.3-2413, 4 pgs. Jun. 10, 2011. |
Simplest Migration to Fibre Channel Technology Article, Digital Equipment Corporation, Nov. 10, 1997, published on PR Newswire. |
Software Product Description: Product Name: InfoServer 100 Software, Version 1.1 SPD 38.59.00, Nov. 1, 1991. |
Software Product Description: Product Name: InfoServer Client for ULTRIX, Version 1.1, SPD 40.78.01, Apr. 1, 1993. |
Software-Practice and Experience, 23(2):201-221, Feb. 1993. |
StorageWorks HSx70 System Specification by Steve Sicola dated Jun. 11, 1996 4:57pm, Revision 4. |
StorageWorks HSx70 System Specification by Steven Sicola dated Jun. 11, 1996 4:57pm, Revision 4. |
Symbios Logic- Software Interface Specification Series 3 SCSI RAID Controller Software Release 02.xx (Engelbrecht Ex 2 (LSI 1421-1658)) (CD-ROM Chaparral Exhibits D013), Dec. 3, 1997. |
Symbios Logic—Hardware Functional Specification for the Symbios Logic Series 3 Fibre Channel Disk Array Controller Model 3701 (Engelbrecht Ex 3 (LSI-1659-1733) (CD-ROM Pathlight Exhibits D074). |
Systems Architectures Using Fibre Channel, Roger Cummings, Twelfth IEEE Symposium on Mass Storage Systems, Copyright 1993 IEEE. pp. 251-256. |
The Legend of AMDAHL by Jeffrey L. Rodengen (5 pages). |
The Legend of AMDAHL by Jeffrey L. Rodengen. |
Three pages by Company News Oncall dated Sep. 9, 2004. |
Trail Transcripts, Crossroads Systems, Inc. v. Chaparral Network Storage, Inc., C.A. No. A-00CA-217-SS (W.D. Tex. 2001) Day 1-4 (CD-Rom). |
Trail Transcripts, Crossroads Systems, Inc. v. Pathlight Technology, Inc., C.A. No. A-00CA-248-SS (W.D. Tex. 2001). Day 1-4 (CD-Rom). |
Translation of Final Office Action in JP 526873/2000 issued on May 14, 2008. 4 pages. |
U.S. Office Action issued in U.S. Appl. No. 11/851,837 dated Dec. 22, 2008, Hoese, 7 pages. |
VBAR Volume Backup and Restore (CRDS 12200-202) (CD-ROM Chaparral Exhibits D099). |
Viking RAID Software (Davies Ex 3 (CNS 180969-181026)) (CD-ROM Chaparral Exhibits D048), Jun. 18, 1905. |
X3T10 994D—(Draft) Information Technology: SCSI-3 Architecture Model, Rev. 1.8 (PTI 165977) (CD-ROM Chaparral Exhibits D087). |
X3T10 995D- (Draft) SCSI-3 Primary Commands, Rev. 11 (Wanamaker Ex 5 (PTI 166050-229)) (CD-ROM Chaparral Exhibits D089), Nov. 13, 1996. |
X3T10 Project 1047D: Information Technology- SCSI-3 Controller Commands (SCC), Rev, 6c (PTI 166400-546) (CD-ROM Chaparral Exhibits D088), Sep. 3, 1996. |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110106998A1 (en) * | 1997-12-31 | 2011-05-05 | Hoese Geoffrey B | Storage Router and Method for Providing Virtual Local Storage |
US8402193B2 (en) | 1997-12-31 | 2013-03-19 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
US9785583B2 (en) | 1997-12-31 | 2017-10-10 | Crossroads Systems, Inc. | Storage router and method for providing virtual local storage |
US9473589B1 (en) | 2012-12-21 | 2016-10-18 | Emc Corporation | Server communication over fibre channel using a block device access model |
US9514151B1 (en) | 2012-12-21 | 2016-12-06 | Emc Corporation | System and method for simultaneous shared access to data buffers by two threads, in a connection-oriented data proxy service |
US9407601B1 (en) | 2012-12-21 | 2016-08-02 | Emc Corporation | Reliable client transport over fibre channel using a block device access model |
US9473590B1 (en) | 2012-12-21 | 2016-10-18 | Emc Corporation | Client connection establishment over fibre channel using a block device access model |
US9473591B1 (en) | 2012-12-21 | 2016-10-18 | Emc Corporation | Reliable server transport over fibre channel using a block device access model |
US9237057B1 (en) | 2012-12-21 | 2016-01-12 | Emc Corporation | Reassignment of a virtual connection from a busiest virtual connection or locality domain to a least busy virtual connection or locality domain |
US9509797B1 (en) | 2012-12-21 | 2016-11-29 | Emc Corporation | Client communication over fibre channel using a block device access model |
US9270786B1 (en) * | 2012-12-21 | 2016-02-23 | Emc Corporation | System and method for proxying TCP connections over a SCSI-based transport |
US9531765B1 (en) | 2012-12-21 | 2016-12-27 | Emc Corporation | System and method for maximizing system data cache efficiency in a connection-oriented data proxy service |
US9563423B1 (en) | 2012-12-21 | 2017-02-07 | EMC IP Holding Company LLC | System and method for simultaneous shared access to data buffers by two threads, in a connection-oriented data proxy service |
US9591099B1 (en) | 2012-12-21 | 2017-03-07 | EMC IP Holding Company LLC | Server connection establishment over fibre channel using a block device access model |
US9647905B1 (en) | 2012-12-21 | 2017-05-09 | EMC IP Holding Company LLC | System and method for optimized management of statistics counters, supporting lock-free updates, and queries for any to-the-present time interval |
US9712427B1 (en) | 2012-12-21 | 2017-07-18 | EMC IP Holding Company LLC | Dynamic server-driven path management for a connection-oriented transport using the SCSI block device model |
US9232000B1 (en) | 2012-12-21 | 2016-01-05 | Emc Corporation | Method and system for balancing load across target endpoints on a server and initiator endpoints accessing the server |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7340549B2 (en) | Storage router and method for providing virtual local storage | |
USRE42761E1 (en) | Storage router and method for providing virtual local storage |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CROSSROADS SYSTEMS, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOESE, GEOFFREY B.;RUSSELL, JEFFRY T.;REEL/FRAME:026398/0820 Effective date: 19971222 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |