Method and system for improved buffer utilization for disk array parity updates
US7290199B2 · kind B2 · utility
5Cited by
6References
21Claims
0Family size
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Key dates
| Filing date | Nov 19, 2004 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | May 5, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2211/1057
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
During a parity update of a parity stripe in a disk array, constant values used in finite field arithmetic are algebraically combined in order to reduce the number of buffers and steps needed to update multiple parity values when a change in data occurs. In one implementation, for example, the contents of a buffer that stores the product of a delta value associated with the change in data and a first constant, which is used to update a first parity value, are multiplied by a value representative of the ratio of a second constant, which is used to update a second parity value, and the first constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.