Disk drive applying feed-forward compensation when writing consecutive data tracks
US9026728B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Jun 6, 2013 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | Jun 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59655
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors, a head actuated over the disk, and control circuitry comprising a servo control system operable to servo the head over the disk. A plurality of data tracks are defined relative to the servo tracks, and a first data track is accessed while servoing the head over the first data track based on a position error signal Xn−1(k) generated at each servo sector of the first data track. Feed-forward compensation values are generated based on Xn−1(k), and a second, consecutive data track is accessed while servoing the head over the second data track based on a position error signal Xn(k) generated at each servo sector of the second data track and based on the feed-forward compensation values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.