Condensing a defect scan log for a disk of a disk drive
US8040625B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Oct 8, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2516
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive to condense a defect scan log for a disk is disclosed. The disk drive comprises: a disk including a plurality of tracks having a plurality of wedges; a head to perform read operations from the disk including reading defects on the disk; and a processor. The processor controls operations in the disk drive including: determining a plurality of defect zones, wherein each defect zone includes a plurality of physical locations on the disk; detecting defects on the disk; recording the defects into the defect scan log as log entries, wherein the log entries comprise a location parameter related to the defect location on the disk; determining that the number of defects detected in a first defect zone exceed a first threshold; and combining the log entries of the first defect zone into a coalesced log entry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.