Mapped RAID (redundant array of independent disks) in a data storage system with drive extents allocated to individual RAID extents from individual sub-groups of storage made up of ranges of logical block addresses defined across a group of hard disk drives
US10146447B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2017 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Jul 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Technology is provided within a mapped RAID (Redundant Array of Independent Disks) system for creating multiple storage sub-groups in a group of disk drives. Each one of the storage sub-groups contains, in each one of the hard disk drives in the group of hard disk drives, a contiguous set of blocks of storage located within a unique range of logical block addresses corresponding to the storage sub-group. Based on the storage sub-groups created by the disclosed technology, a unique corresponding set of drive extents is allocated to each one of the RAID extents in the RAID mapping table, such that all drive extents contained in each one of the sets of drive extents are allocated from within a single one of the storage sub-groups. Drive extents may be allocated such that a low level of variance is maintained within values of a neighborhood matrix for the group of disk drives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.