Logical volume data structure determining configuration status of logical volume based on comparing values of examined volume epoch identifiers on each on-line extent
US6735603B2 · kind B2 · utility
20Cited by
13References
16Claims
0Family size
Inventors
Key dates
| Filing date | Mar 17, 2003 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Mar 17, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99955
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Volume configuration data management systems and methods are described. A logical volume provider maintains an epoch number on each of the extents comprising a volume. Upon each change in the configuration of the volume, the epoch number on each of the currently online extents is updated. When a volume is discovered and a request is made to bring the volume online, the logical volume provider can compare the epoch numbers on the extents to determine if the volume data is consistent across each of the extents, or if an extent contains stale data due to a transitory outage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.