Patent ID: 7725666
Filing Date: 2010-05-25
Classification: G06F,G11B

Abstract:
1. A method for preserving data on a hard disk drive, said method comprising: storing a copy of data read from a first memory location comprising at least one sector of at least one hard disk of a hard disk drive in a second memory location of said hard disk drive; replacing at least a portion of said data in said second memory location of said hard disk drive to create a modified copy of data; storing a copy of said modified copy of data in a non-volatile third memory location of said at least one hard disk of said hard disk drive which is separate from said at least one sector, wherein said first memory location, said second memory location and said third memory location are disposed on the same hard disk drive; replacing the data stored in said at least one sector with said modified copy of data; indicating that said copy of said modified copy of data in said non-volatile third memory location is an invalid copy of said modified copy of data subsequent to said replacing the data stored in said at least one sector with said modified copy of data; and initiating a start up routine of a computer system comprising said hard disk drive; determining that said copy of data from said first memory location has not been correctly replaced with said modified copy of data; and replacing said copy of data with said modified copy of data.