Patent ID: 7333287

Claim:
A head position control method for controlling a position of a head of a first apparatus with respect to a disk which has been formed with a plurality of tracks and has been recorded with servo information including position information in servo frames by a second apparatus that is different from the first apparatus, comprising the steps of: (a) measuring an eccentricity of the disk in the first apparatus and calculating a correction value for controlling the head to scan a virtual circular locus approximately matching the plurality of tracks; (b) writing the correction value in a specific servo frame of only a specific track in the first apparatus, wherein at least one of the plurality of tracks does not include the correction value written thereon; and (c) controlling the head during a seek in the first apparatus for any of the plurality of tracks, based on the correction value read from the specific servo frame, so that the head scans the virtual circular locus approximately matching the plurality of tracks which have been formed by the second apparatus.