Method and apparatus for protecting the integrity of cached data in a direct-attached storage (DAS) system
US8732396B2 · kind B2 · utility
3Cited by
11References
16Claims
0Family size
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Key dates
| Filing date | Jun 4, 2010 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Dec 24, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/262
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A DAS system that implements RAID technology is provided in which an array of solid state disks (SSDs) that is external to the DAS controllers of the DAS system is used by the DAS controllers as WB cache memory for performing WB caching operations. Using the external SSD array as WB cache memory allows the DAS system to be fully cache coherent without significantly increasing the complexity of the DAS system and without increasing the amount of bandwidth that is utilized for performing caching operations. In addition, using the external SSD array as WB cache memory obviates the need to mirror DAS controllers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.