| US 7,538,965 B2 | ||
| Method and apparatus for writing servo management information in a disk drive | ||
| Katsuki Ueda, Ome (Japan); Yuichi Notake, Tokyo (Japan); Masahide Yatsu, Akishima (Japan); Hideo Sado, Ome (Japan); Seiji Mizukoshi, Nishitama-gun (Japan); Takuji Shimada, Ome (Japan); and Takayuki Matsuzaki, Hamura (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Jun. 27, 2007, as Appl. No. 11/819,407. | ||
| Claims priority of application No. 2006-182051 (JP), filed on Jun. 30, 2006. | ||
| Prior Publication US 2008/0002278 A1, Jan. 03, 2008 | ||
| Int. Cl. G11B 21/02 (2006.01); G11B 5/09 (2006.01); G11B 5/596 (2006.01) | ||
| U.S. Cl. 360—75 [360/49; 360/77.08] | 4 Claims |
| 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.
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