Disk drive performing multi-level prioritization of entries in a suspect sector list to identify and relocate defective data sectors
US7274639B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2004 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | Apr 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2516
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a disk having a plurality of data tracks, wherein each data track comprises a plurality of data sectors, and a head is actuated over the disk. A suspect sector list (SSL) stores a plurality of SSL entries, wherein each SSL entry identifies at least one suspect data sector. The disk drive further comprises a disk controller for executing an access command received from a host computer to access at least one of the data sectors. If an error is detected while executing the access command, the disk controller generates an SSL entry having a priority level selected from at least three priority levels and adds the SSL entry to the SSL. A verification operation is executed for each suspect data sector identified by each SSL entry, wherein the SSL entries are processed relative to the priority level assigned to each SSL entry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.