Disk drive with recent write streams list for data refresh determination
US9268649B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2011 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Jul 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a disk comprising a plurality of refresh regions, each refresh region comprising a range of logical block addresses (LBAs). The disk drive further comprises a recent write streams list comprising one or more entries, each entry representing an LBA stream. The disk drive further comprises a head actuated radially over the disk to write data to and read data from the disk, and control circuitry coupled to the head, wherein the control circuitry is operable to execute a write command comprising one or more LBAs, determine whether the one or more LBAs are sequential to an entry in the recent write streams list, modify an entry in the recent write streams list when the one or more LBAs are sequential to the entry, and utilize the modified entry to determine whether to reset a refresh counter associated with a refresh region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.