Disk drive comprising index spiral track identified by change in sync mark
US7839591B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2008 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Mar 19, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59666
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a disk and a head actuated over the disk. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted by a sync mark at a sync mark interval. A first spiral track comprises a first sync mark from an outer diameter of the disk to a reference radial location and a second sync mark from the reference radial location toward an inner diameter of the disk. A second spiral track comprises the second sync mark from the outer diameter of the disk to the reference radial location and the first sync mark from the reference radial location toward the inner diameter of the disk. The first sync mark is different than the second sync mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.