METHOD TO RECOVER DATA SECTOR DAMAGED BY ABRUPT POWER LOSS IN HARD DISK DRIVES

摘要

A hard disk drive that is coupled to a non-volatile memory. The non-volatile memory includes data that was designated to be stored in the hard disk drive in a previous time period. When a power loss event is detected the hard disk drive stores the track address of the last written track in non-volatile memory. When power is returned, the hard drive retrieves the last track address from the non-volatile memory. The data can then be rewritten onto the last track. Such an approach allows relatively large sectors of 4 Kbytes to be recaptured after a power loss event.