Patent ID: 6791780
Filing Date: 2004-09-14
Classification: G11B

Abstract:
A method to optimize a write channel in a hard disk drive, comprising:a) providing a disk having at least one side with a plurality of tracks; b) selecting a target track from said plurality of tracks; c) writing at least once on a predetermined plurality of tracks adjacent to either side of said target track and on said target track; d) writing a predetermined number of times on tracks immediately adjacent to said target track; e) reading data written on said predetermined plurality of tracks adjacent to either side of said target track and on said target track; f) determine if a number of errors on said tracks is greater than a predetermined criteria, if so, decreasing a write current value of said write channel, otherwise increasing said write current value; g) repeating steps c) through e); and, determining if a number of errors on said tracks is greater than a second predetermined criteria, if so, decreasing a write current value of said write channel, and repeating steps g) and h); otherwise decreasing said write current value, and re-optimizing said predetermined number of write channel parameters.