Optimization of storage device accesses in RAID systems
US7917831B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2007 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Jan 26, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2211/1064
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A result value, such as a parity value, for a set of corresponding data elements from a plurality of storage devices is determined using a commutative operation. When accessing the set of corresponding data elements from a plurality of storage devices, a dual access can be performed for the storage device accessed last for the set of corresponding data elements so as to also obtain a data element from the last-accessed storage device for the next parity calculation. As a result, the number of storage device accesses can be reduced compared to conventional systems whereby a single access is performed for each storage device to obtain a single data element from the storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.