Expansion of RAID subsystems using spare space with immediate access to new space
US7111117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2001 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Jun 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1096
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method to expand a RAID subsystem from a first array of disk drives to a second array of disk drives. The first array includes a set of data disk drives storing old data and spare space, and the second array includes the first array and at least one new disk drive. First, the old data are distributed among the set of data disk drives and at least one new disk drive while, at the same time, new data are mapped to the spare space. Upon completion of the distribution, the new data are copied from the spare space to the set of data disk drives and at least one new disk drive to enable concurrent expansion of the first array while accessing the old and the new data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.