Patent ID: 7082008
Filing Date: 2006-07-25
Classification: G11B

Abstract:
1. A servo pattern deviation correcting method which is executed by a disk apparatus having a read/write head including a write head and a read head, the write head writing information to a disk and the read head reading information from the disk, the method comprising the steps of: writing servo pattern blocks to respective sectors of the disk along a target track of the disk through servo track writing, each servo pattern block containing a gray code and burst signals; detecting a deviation of each servo pattern block written to the disk from a position of the target track in a transverse direction of the target track; creating a servo pattern deviation correction pattern (SPDCP) for each servo pattern block based on the deviation of the servo pattern block; writing the SPDCP for each servo pattern block to a predetermined region of the disk between the servo pattern block and a data region for each of said respective sectors, the SPDCP, written to the disk, being located along the target track immediately following the burst signals of the servo pattern block and preceding the data region; and reading the SPDCP from the predetermined region of the disk for each servo pattern block of each of said respective sectors, so that the read head and the write head are shifted to deviation-corrected positions on the target track based on both the servo pattern block and the SPDCP read from each of said respective sectors, such that the read head and the write head are capable of reading and/or writing to a data region in a same sector using a respective deviation-corrected position before said read head and said write head are shifted in a subsequent sector.