| US 7,466,509 B1 | ||
| Disk drive operable with first and second servo patterns in a perpendicular media recording environment | ||
| Teddy T. C. Chen, Huntington Beach, Calif. (US); Jinsheng Bill Jang, Irvine, Calif. (US); Jie Yu, Irvine, Calif. (US); and Jonathan V Nguyen, Laguna Niguel, Calif. (US) | ||
| Assigned to Western Digital Technologies, Inc., Lake Forest, Calif. (US) | ||
| Filed on Sep. 22, 2006, as Appl. No. 11/525,406. | ||
| Int. Cl. G11B 21/02 (2006.01) | ||
| U.S. Cl. 360—75 | 27 Claims |
| 1. A disk drive comprising:
a moveable head operable with a perpendicular flux;
a disk having a plurality of tracks, each track having a plurality of servo sectors utilized in seek operations, wherein the
servo sectors of the disk include a first servo pattern between one of an inner diameter (ID) or an outer diameter (OD) of
the disk and a middle diameter (MD) of the disk, respectively, and a second servo pattern between the other of the OD or the
ID of the disk and the MD of the disk, respectively; and
a servo controller to control seek operations with the moveable head, the servo controller to operate in a first mode when
seeking within one of the first or second servo patterns and a second mode when seeking between the first servo pattern and
the second servo patterns.
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