Disk drive computing data center off-track from repeatable runout of write servo track and read servo track
US7961422B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2009 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | May 28, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a disk having a plurality of servo tracks that define a plurality of data tracks, and a head actuated over the disk by a voice coil motor (VCM), wherein the head comprises a read element offset radially from a write element. The read element is positioned over a first servo track and the write element is positioned over a second servo track, and a first repeatable runout (RRO) of the first servo track is measured. The read element is positioned over the second servo track, and a second RRO of the second servo track is measured. A data center off-track is computed in response to the first RRO and the second RRO.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.