Disk drive measuring down-track spacing of read sensors
US9257145B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2014 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Aug 5, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10222
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a disk comprising a track, wherein the track comprises a sync mark. The disk drive further comprises a head comprising a plurality of read sensors including a first read sensor, and a second read sensor separated from the first read sensor by a down-track spacing. A first time-stamp (TS1) is generated after detecting the sync mark using the first read sensor as the disk rotates, and a second time-stamp (TS2) is generated after detecting the sync mark using the second read sensor as the disk rotates. A calibration value representing the down-track spacing is generated based on the TS1 and the TS2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.