In a technique for restoring data damaged by a computer virus on a magnetic information recording disk in a hard disk drive, booting information required to boot the hard disk drive and file position information indicating the position of a file when data is stored in a file unit are backed up in a predetermined...http://www.google.ca/patents/US6584583?utm_source=gb-gplus-sharePatent US6584583 - Method and apparatus for restoring data damaged by a computer virus on a magnetic information recording disk in a hard disk drive