Interleaved redundancy sector for correcting an unrecoverable sector in a disc storage device
US5751733A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1996 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Sep 16, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1866
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc drive storage system is disclosed that employs sector level and track level error correction systems (ECS), wherein the track level error correction capability is increased by interleaving the track level redundancy. In the preferred embodiment, each sector on the disc is divided into three interleaves or codewords with sector level redundancy generated for each interleaved codeword. The track level redundancy is then generated by combining the interleaved codewords separately according to a predetermined error correction operation (e.g., byte XOR) to form an interleaved redundancy sector. During readback, the sector level ECS generates an erasure pointer corresponding to an uncorrectable codeword within a sector for use by the track level ECS. In this manner, the track level ECS can correct up to three uncorrectable sectors when three sectors contain a single uncorrectable codeword in separate interleaves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.