Parity-based raid system configured to protect against data corruption caused by the occurrence of write holes
US8527698B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 2010 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Jul 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2211/1059
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A RAID system is provided in which the RAID controller of the system causes a predetermined number, N, of IO commands to be queued in a memory element, where N is a positive integer. After the N IO commands have been queued, the RAID controller writes N locks associated with the N IO commands in parallel to a service memory device. The RAID controller then writes N stripes of data and parity bits associated with the N IO commands to the PDs of the system to perform striping and parity distribution. If a catastrophic event, such as a power failure, occurs, the RAID controller reads the locks from the service memory device and causes parity to be reconstructed for the stripes associated with the locks. These features improve write performance while preventing the occurrence of data corruption caused by write holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.