Mapped raid restripe for improved drive utilization
US10365845B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2017 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Feb 2, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0617
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques for managing restriping of data across drives of a data storage system in a mapped-RAID environment. In response to addition of a drive to existing drives of the data storage system, all drive extents of the data storage system are mapped out in an effort to consume as much free space as possible across the drives. Having mapped out the drive extents, how many free extents remain on each drive is determined. If a quantity of free extents on a drive exceeds a predetermined threshold number, then that drive is logically marked as requiring restriping. Restriping of data is then performed for all logically marked drives. Once the restriping of the data is completed, a determination is made as to whether any further restriping of data across the drives of the data storage system is required, taking into account a relative wear and/or utilization of the respective physical drives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.