Disk drive generating quality metric map for a data track while in different configurations
US9099159B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2013 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Aug 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/10916
- 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 read channel. A plurality of data tracks are defined relative to the servo tracks, wherein each data track comprises a plurality of segments. The read channel is configured into a read mode in order to first read a first segment of a first data track. During the first read, a quality metric is generated at periodic points along the first segment. After the first read, the read channel is configured into a non-read mode for a predetermined interval. After the predetermined interval, the read channel is configured into the read mode in order to second read the first segment of the first data track and generate the quality metric at the periodic points along the first segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.