Method for improving servo performance in a disk drive...

Details Method for improving servo performance in a disk drive... Method for improving servo performance in a disk drive...

2006-09-19

2006-09-19

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S048000

Reexamination Certificate

active

07110208

ABSTRACT:
A method is disclosed for improving servo performance in a disk drive having a plurality of concentric tracks. Each track has a plurality of first-type servo sectors and a plurality of second-type servo sectors. In the method, track identification information and track position information are read from a first-type servo sector. A track number and a transducer position are estimated for a second-type servo sector. Track position information is read from the immediately following second-type servo sector. An odd/even property from the second-type servo sector is compared with an odd/even property for the estimated track number. The odd/even property of the estimated track number is conditionally adjusted such that the odd/even property of the estimated track number matches the odd/even property from the second-type servo sector. A position error signal is determined using the adjusted track number and the track position information read from the second-type servo sector.

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patent: 6556365 (2003-04-01), Satoh
patent: 6992854 (2006-01-01), Gostling
patent: 2003/0035239 (2003-02-01), Ottesen et al.

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