Data storage device employing multi-level parity sectors for data recovery procedure
US10606699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2019 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Jan 10, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/185
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed wherein a first plurality of codewords are generated each comprising a plurality of symbols, and a first parity sector is generated over the first plurality of codewords. A second plurality of codewords are generated each comprising a plurality of symbols, and a second parity sector is generated over the second plurality of codewords. A third parity sector is generated over a first subset of the first plurality of codewords and a first subset of the second plurality of codewords, and a fourth parity sector is generated over a second subset of the first plurality of codewords and a second subset of the second plurality of codewords. When processing of a first codeword fails, the first codeword and the first parity sector are processed using a LDPC type decoder, and the first codeword and the third parity sector are processed using the LDPC type decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.