Patent ID: 6738924
Filing Date: 2004-05-18
Classification: G11B

Abstract:
A method for mapping logical block addresses to an actual location on a disc drive comprising the steps of:(a) dividing a logical block address by a number of sectors within a cylinder to estimate a starting cylinder location for the selected logical block address; and (b) determining a number of skipped defective sectors that have occurred prior to a cylinder start; (c) adding the number of defective sectors skipped prior to the cylinder start to a beginning sector location of the cylinder; (d) adjusting the starting cylinder by the number of cylinders skipped prior to the estimated start cylinder; (e) subtracting the number of sectors skipped prior to the location of the cylinder start and a number of sectors in the cylinders prior to the cylinder start from the logical block address to determine a quantity; (f) dividing the quantity by a number of sectors within a track associated with the cylinder to estimate a track location for the logical block address; and (g) seeking to the head associated with the estimated track location.