DISK DRIVE DEVICE AND MANUFACTURE THEREOF, SEEK CONTROL METHOD OF DISK DRIVE DEVICE, AND DISK DRIVE CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To improve performance of a whole disk drive device while keeping the reliability. SOLUTION: Tracks used for the recording and tracks unused for the recording are alternately arranged in the specific areas of a magnetic disk 1. By a control part 3, the range of the specific areas is kept, and the threshold for detecting the completion of the seek against the tracks in the specific area is mitigated than the threshold for detecting the completion of the seek against the tracks out of the specific area.