Patent ID: 6498695
Filing Date: 2002-12-24
Classification: G11B

Abstract:
A method of detecting a position on a disk which is time-divisionally recorded with a data region and a servo region based on a signal read from the disk, said servo region being recorded with a first servo pattern having a length of consecutive â€œ0â€ s longer than a length of consecutive â€œ0â€ s existing in the data region, said first servo pattern having three or more zones with consecutive â€œ0â€ s, said method comprising the steps of:(a) digitizing the signal read from the disk and slicing at a predetermined level so as to convert the signal into â€œ0â€  or â€œ1â€ ; and (b) detecting a second servo pattern when two zones with consecutive â€œ0â€ s are detected from information converted by said step (a).