Safeguarding hard drive data

摘要

The computer has a security potion which arranges that the computer may only be initialized if a correct password is supplied and if the hard drive is the same as that which was originally installed together with the security portion. The methods for installing and removing the security portion involve the manipulation of the boot code on the hard drive. The security portion can inhibit disk control commands from writing to the boot sector on the hard disk to guard against circumvention of the security system.