Data storage device employing memory efficient processing of un-converged codewords
US10530390B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2018 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | Aug 30, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/185
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a head actuated over a disk comprising a data track having at least a first data segment and a second data segment. A first plurality of codewords are generated, and a first parity sector is generated over the first plurality of codewords. The first plurality of codewords and the first parity sector are written to the first data segment. A second plurality of codewords are generated, and a second parity sector is generated over the second plurality of codewords. The second plurality of codewords and the second parity sector are written to the second data segment. During a read operation the data segments of the data track are processed sequentially to decode the codewords using a low density parity check (LDPC) decoder, wherein the reliability metrics of un-converged codewords are stored in a codeword buffer and updated using the respective parity sector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.