Method for reconstructing data in case of two disk drives of RAID failure and system therefor
US7640452B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2006 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Dec 22, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1084
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention is to provide a method for reconstructing data in case of failure of two HDs of a RAID, wherein the RAID is a logical disk drive assembly including at least three HDs and a RAID controller and data is divided into block strips which are stored on data blocks of different HDs respectively, The method comprises the steps of reading super blocks of all of the HDs; comparing the number of the HDs and time being involved in a previous operation and stored in the super blocks with each other; reading common data involved in the previous degraded operation of the RAID; writing the read common data into the super blocks of all of the HDs; and recovering a configuration of the RAID to the degraded mode again.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.