A computer system includes hardware for selectively disabling alteration of data residing on a mass storage device which is subject to remote access. In one embodiment, a hard disk drive is operated in a conventional manner including both read and write modes when the system is being operated in a non-secure...http://www.google.cl/patents/US6272533?utm_source=gb-gplus-sharePatent US6272533 - Secure computer system and method of providing secure access to a computer system including a stand alone switch operable to inhibit data corruption on a storage device
