Management of defect areas in recording media
US5075804A · kind A · utility
91Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Mar 31, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved method of managing media defects in disk drives keeps an operating list of the tracks in the disk drive, and for each track enters on the list the number of good sectors (i.e., those free of defects) in that track. Thus the information on the operating list is sufficient for the disk drive microprocessor to avoid use of the defective sectors, each of which is labelled in its header as being defective. This method is compatible with SCSI and other common disk drive interfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.