Patent ID: 7538965
Filing Date: 2009-05-26
Classification: G11B

Abstract:
1. A method of writing servo data for positioning a head on a disk medium in a disk drive, the method comprising: recording, with the head, servo data in an area corresponding to a designated servo sector on the disk medium; and recording a servo-write management information in an area for recording servo burst signals contained in the servo data, in the form of binary data coded based on a combination of same phase patterns and opposite phase patterns composed of the servo burst signals, wherein servo burst signals A and B and servo burst signals C and D are recorded in the area for recording the servo burst signals, wherein the coded binary data is represented as a “1” when servo burst signals A and B have the same phase pattern or when servo burst signals C and D have the same phase pattern, and wherein the coded binary data is represented as a “0” when servo burst signals A and B have the opposite phase pattern or when servo burst signals C and D have the opposite phase pattern.