CN103632705A

CN103632705A - Solid-state storage array capable of destructing data

Info

Publication number: CN103632705A
Application number: CN201310612809.5A
Authority: CN
Inventors: 李四林; 肖志辉; 陈俊
Original assignee: SHENZHEN RECADATA TECHNOLOGY Co Ltd
Current assignee: SHENZHEN RECADATA TECHNOLOGY Co Ltd
Priority date: 2013-11-26
Filing date: 2013-11-26
Publication date: 2014-03-12

Abstract

The invention belongs to the technical field of storage equipment, provides a solid-state storage array capable of rapidly destructing data under an emergent condition, which overcomes the problem that the data of the storage array is difficult to completely destruct in short time. The solid-state storage array has a basic data storage function; furthermore, a solid-state disk module capable of destructing data (2) is used as a basic storage unit and is combined with a destruction triggering device (3), a destruction control module (5) and a destruction state display module (4) to form an independent data safe destruction system; the data can be rapidly and completely destructed at any time point in the operation process of equipment and a whole data destruction schedule is displayed; the solid-state storage array capable of rapidly destructing the data is applicable to military project or commercial application fields needing to rapidly and safely destruct the data to prevent confidential data from being leakage under the emergent condition.

Description

Data destroying solid-state storage array

Technical field

The invention belongs to memory device technical field, provide a kind of and can in case of emergency realize the solid-state storage array that data are destroyed fast.

Background technology

At present; military or commercial disk memory array and solid-state storage array are the memory devices based on standard machinery disk or common solid state hard disc; support RAID(Redundant Array Independent Disk) the several data resist technology such as protection, HotSpare disk (Spare Disk) protection, metadata (Metadata) protection, can be after some hard disk corruptions obliterated data not still.But; also just because of itself powerful data protection function; when running into the emergency condition of the quick thoroughly destruction of requirement data; the data of storage array are difficult to destroyed or destroy not thorough at short notice; even to carry out independent destruction to the data of each piece hard disk wherein and just can reach destruction object; itself there is the risk that data are resumed in standard machinery disk and solid state hard disc in addition, therefore more easily causes confidential data to reveal.

Summary of the invention

The technical issues that need to address of the present invention are: in emergency circumstances will destroy data to prevent leakage of data, and the data of storage array are difficult to thoroughly be destroyed at short notice.

The invention provides a kind of data destroying solid-state storage array based on data destroying function solid state hard disc, this storage array has simple and safe data destroying trigger mechanism, can indicate in real time destruction progress, and there is memory destruction function, can guarantee fast and safely to destroy data.

Concrete technical scheme of the present invention is: using data destroying function solid state hard disc module as basic unit of storage, in conjunction with data destroying trigger module, data destroying control module, data destroying state display module, form independently data security destroying system.Data destroying trigger module has anti-error trigger mechanism, by two steps, complete external trigger, then data destroying control module judges trigger pip, if trigger effectively, export data destroying internal trigger signal, now no matter whether storage array is is read and write, inner all hard disc modules all can be destroyed instruction by while executing data, and whether the destroy state of each hard disk of destroy state display module simultaneous display prompting destroy successful.In addition, owing to having taked memory to destroy mechanism, even if during Destruction power-off midway also can continue to destroy data after energising again.

The present invention compares common disk array or solid state array is shown following advantage:

1. data security destroying system independently, does not affect normal data storage function at ordinary times, can the random time in operational process interrupt data store tasks, executing data destroy command again.

2. destroy fast function, all solid state hard disc modules are destroyed data simultaneously, and the erasable speed of solid state hard disc itself is fast, can destroy at short notice the data of all NAND FLASH unit.

3. function is destroyed in memory, no matter is solid-state storage array or single solid state hard disc module, even during Destruction power-off midway, energising also can continue to destroy data again, until destroy completely.

Accompanying drawing explanation

Fig. 1 data destroying solid-state storage array system block diagram.

Fig. 2 data destroying solid state hard disc module principle of work block diagram.

Fig. 3 destroys control module principle of work block diagram.

Fig. 4 data destroying flow chart of steps.

Embodiment

In Fig. 1, data destroying solid state hard disc module (2) and destruction control module (5), and outside destruction flip flop equipment (3), destroy state display module (4) form independently data security destruction control system.Data destroying solid state hard disc module (2) and backboard hard disk management module (7) in addition, and dual control redundant module (6) forms independently data-storage system.Dual power supply redundancy module (8) provides all power supplys for whole data destroying solid-state storage array.

Fig. 2 is the destruction theory diagram of data destroying solid state hard disc module (2), when Fig. 3 destroys Single Chip Microcomputer (SCM) system (1) the output data destroying internal trigger signal in control module, if this signal is judged as useful signal by the SSD memory controller (1) of Fig. 2, SSD memory controller starts to wipe all NAND FLASH of storage chip array (2) unit.Simultaneously, SSD memory controller output data destroying condition indicative signal, this condition indicative signal outputs to destroy state display module (4) after the Single Chip Microcomputer (SCM) system of Fig. 3 is processed, and is shown the destroy state of each piece solid state hard disc by destroy state display module (4).

Embodiment adopts following configuration:

1. data destroying function solid state hard disc module: 12 2.5 cun of SATA interface data are destroyed function solid state hard discs.This solid state hard disc has following characteristic:

A) data destroying internal trigger signal is low level (V _iL<0.4V) and to be greater than 3s be effective trigger pip the duration;

B) trigger after destruction, according in the DoD5220.22-M of U.S. Department of Defense country Industrial Security Operating Manual about the data destroying standard of computer memory device, solid state hard disc memory controller, to all NAND FLASH cell erasure one time, makes hard disk get back to no initializtion state;

C) data destroying condition indicative signal is exported height (V in erase process _oH=3.0V～3.6V, V _oL=0.6V～0.8V) level square wave, exports high level after thoroughly wiping;

D) if power-off or depart from from storage array in during Destruction again powers on or installs back in array and can continue to destroy, until destroyed.

2. destroy control module: take singlechip controller ATMEL AT89S51(totally 32 I/O ports) form destruction trigger pip and destroy state signal input/output control circuit for core.Characteristic is as follows:

A) wherein 26 I/O port assignment of ATMEL AT89S51: 1 Port detecting data destroying outer triggering signal, 1 port output data destroying internal trigger signal, the data destroying process of 12 solid state hard discs of 12 Port detectings, the data destroying state of 12 solid state hard discs of 12 port output.Below for destroying, control menu 1 and table 2.

Destroy trigger pip input/output function table 1

Input (A)	Output (Y)
		H	Z
L	L

Destroy state signal input/output function table 2

B) judgement trigger pip, and export data destroying internal control signal;

C) indicator signal is destroyed in judgement, output data destroying progress;

D) judgement is destroyed and is finished indicator signal, output data destroying end signal.

3. destroy flip flop equipment: adopt dual fail-safe to trigger destruction and prevent false triggering.

A) metal key switch and metal button normally-open normally-close switch form safe related function flip flop equipment jointly.

B), after key switch is opened, metal button swtich is pressed could control to trigger and is destroyed signal access low level

4. destroy state display device: adopt simple and reliable LED lamp, be divided into green and red status LED lamp, every group of LED lamp is corresponding one by one with data destroying function solid state hard disc.

A) there is the indication of the LED of destruction lamp and buzzer warning indication.

B) do not trigger under the normal service condition of destroying, LED lamp and alarm buzzer acquiescence are not worked.

C) after trigger destroying, corresponding hardware destroy indication LED red led starts flicker, and hummer starts to report to the police, and destroys to finish rear LED red led and extinguish, and hummer is stop alarm after destruction finishes, and green indicating lamp becomes normal bright until system and restarts.

5. backboard hard disk management module: totally 12 groups of SAS hard-disk interfaces (each group data-interface and power interface are completely independent) independently.

6. dual control redundant module: form seamless data transmission redundant control module by two groups of optical fiber memory controllers.

7. dual power supply redundancy module: by two groups of 250W electric power generating composition redundant power modules.

Claims

1. the data destroying solid-state storage array based on data destroying solid state hard disc module (2), comprise and destroy flip flop equipment (3), destruction control module (5), destroy state display module (4), it is characterized in that having independently data destroying control system.

2. data destroying solid state hard disc module according to claim 1 (2), it is characterized in that: erasable speed is fast, after trigger destroying, memory controller is to all NAND FLASH cell erasure one time, even if erase process is power-off midway, again after energising, also can continue to wipe NAND FLASH unit, until all NAND FLASH unit is wiped free of.

3. according to described in claim 1 and claim 2, by data destroying control system, can control all data destroying solid state hard disc modules (2) and carry out data destroying simultaneously, it is characterized in that: the data of storage array can be destroyed at short notice.

4. destruction control module according to claim 1 (5), it is characterized in that: management data is destroyed whole process, guarantee that data are destroyed completely, even the power-off midway of data destroying process, again after energising, also can continue to destroy data, until all data are destroyed.

5. destruction flip flop equipment according to claim 1 (3), is characterized in that: metal key switch and metal button normally-open normally-close switch form false triggering preventing device jointly to prevent false triggering data destroying function.