Patent ID: 7664981
Filing Date: 2010-02-16
Classification: G06F

Abstract:
1. A method of restoring source data if the source data if the source data, written in a source region of a system region of a hard disk drive, and mirror data that is a copy of the source data and that is written in a mirror region of the system region, are both damaged, the method comprising: reading the source data on a sector basis and determining error-free sectors and error-generated sectors; reading the mirror data on a sector basis in such a way that sectors corresponding to the error-generated sectors are read; resetting a position of the source region and the mirror region when the source data and the mirror data cannot be rewritten at respective original write positions due to damage of the system region; and restoring source data in a disk drive by merging source data read from the error-free sectors and mirror data read from the sectors corresponding to the error-generated sectors and rewriting the merged data to the reset source region and to the reset mirror region.