Method and system for rapidly recovering data from a “sick” disk in a RAID disk group
US7574623B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2005 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | May 6, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1088
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for recovering data from a “sick” disk are described. One embodiment of the invention relates to a RAID-based storage system that predicts the failure of a disk (e.g., a “sick” disk) in a RAID disk group. Accordingly, the storage system allocates a target disk, selected from several spare disks, to replace the “sick” disk in the RAID disk group upon completion of a disk-to-disk copy operation. Once a target disk has been allocated, a disk-to-disk copy operation is initiated to copy data from the “sick” disk to the target disk, thereby preventing the need to reconstruct data on the “sick” disk if the “sick” disk actually fails. During the disk-to-disk copy operation, client-initiated disk access operations continue to be serviced. Upon completion of the disk-to-disk copy operation, the storage system reconfigures the RAID disk group by swapping the target disk with the “sick” disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.