Patent ID: 6297926
Filing Date: 2001-10-02
Classification: G11B

Abstract:
A device for compensating for interhead track position offset in a disk drive recording apparatus, comprising:at least one disk including concentrically arranged tracks with servo information periodically arranged on the tracks;a plurality of heads separated from each other and positioned in opposing relation to respective surfaces of the at least one disk;measuring means for measuring interhead track position offset values representative of the interhead track position offset in an embedded servo sector mode caused by offset of tracks on disk surfaces resulting from a servo recording pattern on the respective surfaces of the at least one disk, the measuring means for measuring interhead track position offset values generating a corresponding identification signal whenever a servo address mark is detected and combining the corresponding identification signal and a servo calibration signal to measure a corresponding value of the interhead track position offset;storing means for determining and storing an average value of the interhead track position offset values; andcompensating means for compensating for the interhead track position offset caused by offset of tracks on disk surfaces resulting from said servo recording pattern, based on the average value, in head switching from the tracks on a selected surface of the at least one disk to the tracks on an opposite surface to the selected surface of the at least one disk.