Assigning RAID extents and changing drive extent allocations within RAID extents when splitting a group of storage drives into partnership groups in a data storage system
US10126988B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2017 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Jul 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/327
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques are provided within a mapped RAID (Redundant Array of Independent Disks) system for assigning RAID extents to partnership groups and changing drive extent indications within RAID extents when splitting a group of storage drives into partnership groups. RAID extents are assigned to a RAID extent group corresponding to a newly created partnership group from a subset of RAID extents that contain RAID extents indicating higher total numbers of drive extents located in the physical data storage devices contained in the partnership group. When changing drive extent indications in RAID extents, new drive extents may be allocated to replace drive extents located outside of a partnership group such that a resulting variance in the values of a neighborhood matrix for the partnership group is minimized, to ensure that RAID extents are evenly distributed across the drives in the corresponding partnership group, to prevent drive rebuild performance from being compromised.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.