Method for preventing repeating non-recoverable read errors at same physical location on data storage media
US6539496B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1999 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Oct 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods are provided for preventing data from being written to a data sector that has been identified as faulty on a disk in a disk drive system. It is first determined whether data of a data sector of a portion of a disk is recoverable. If the data is non-recoverable, an invalid logical ID is written to the logical block address (LBA) corresponding to the data sector thereby identifying the data sector as faulty and preventing data from being written at the data sector. The LBA is then reallocated to point to a different data sector if the data is non-recoverable. Thus, further data directed to the LBA will be written to the different data sector responsive to the reallocated LBA, thereby avoiding writing the new data to the data sector identified as faulty. Internal drive read re-tries can still take place on the faulty data sector even after the LBA has been assigned an invalid logical ID.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.