Mapped RAID (redundant array of independent disks) in a data storage system with RAID extent sub-groups that are used to perform drive extent allocation and data striping for sequential data accesses to a storage object
US10140041B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2017 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Jul 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Technology is provided within a mapped RAID system that creates multiple RAID extent sub-groups in a RAID mapping table. Each of the RAID extent sub-groups contains a unique set of consecutively located RAID extents within the RAID mapping table, and a unique corresponding set of drive extents is allocated to the RAID extents contained in each one of the RAID extent sub-groups. Drive extents are allocated to each RAID extent sub-group such that no drive extent is allocated to any RAID extent contained in the RAID extent sub-group that is located on the same hard disk drive as any other drive extent allocated to any other RAID extent contained in that RAID extent sub-group. Data striping may be performed based on the RAID extent sub-groups, such that host data is divided into data elements that are striped across the RAID extents contained in one or more individual RAID extent sub-groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.