Disk drive adjusting a defect threshold when scanning for defective sectors
US9042045B1 · kind B1 · utility
5Cited by
29References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2007 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Aug 7, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/183
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed including a disk having a plurality of sectors, and a head actuated over the disk. A defect threshold is initialized, and a first sector is read to generate a first read signal. The first read signal is processed to detect a defect in the first sector relative to the defect threshold. After detecting the defect, the defect threshold is adjusted and the first sector is reread to generate a second read signal. The second read signal is processed to detect the defect in the first sector relative to the adjusted defect threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.