Splitting a group of physical data storage drives into partnership groups to limit the risk of data loss during drive rebuilds in a mapped RAID (redundant array of independent disks) data storage system
US10678643B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2017 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Nov 4, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In response to detecting that a total number of physical data storage drives in a group of physical data storage drives exceeds a maximum drive group size, the group of physical data storage drives is divided into a multiple partnership groups, and RAID extents in a RAID mapping table are divided into multiple RAID extent groups. Each one of the RAID extent groups contains multiple RAID extents and corresponds to one of the partnership groups of physical data storage drives. The RAID extents in each RAID extent group only indicate physical data storage drives contained in the corresponding partnership group of physical data storage drives, in order to ensure that data recovery and RAID extent rebuilding after a drive failure involve only the physical data storage drives within the same partnership group as the failed physical data storage drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.