Method for mapping around defective sectors in a disc drive
US4746998A · kind A · utility
138Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1985 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Nov 20, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The defect list, as supplied by the manufacturer, is stored on the outer tracks of the disc. It is merged with the user-supplied media defect list during formatting and used to flag defective sectors. During initialization the merged defect list is loaded into a section of dynamic memory so that it is accessible during seeking of a particular address.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.