Patent ID: 7474496
Filing Date: 2009-01-06
Classification: G11B

Abstract:
1. A servo system for a hard disk drive comprising a first actuator, a second actuator, a head, and a disk on which is formed a plurality of tracks containing servo data, comprising: a first stimulus that causes the first actuator to move the head to at least two calibration tracks on the disk; a second stimulus that causes the second actuator to move the head relative to the at least two calibration tracks; and a calibration system for generating a calibration factor based on the second stimulus and the movement of the second actuator relative to each of the at least two calibration tracks, wherein the calibration factor is computed from a position error signal, resulting from the movement of the second actuator relative to each of the at least two calibration tracks, based on servo bursts associated with both of the at least two calibration tracks.