Tag memory disk cache architecture
US6862660B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2003 |
| Grant date | Mar 1, 2005 |
| Priority date | — |
| Expiry date | Jun 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/313
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention is embodied in the disk drive having a cache control system that is configured to efficiently respond to host commands by forming variable length segments of memory clusters for caching disk data in contiguous ranges of logical block addresses without regard to the sequential order of the memory clusters. The cache control system has a tag memory usable only for defining the segments. The tag memory has a plurality of tag records pointing to cluster control blocks associated with the memory clusters for defining the segments. The tag memory may be accessed and updated by several state machines in the cache control system and by a microprocessor in the disk drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.