Restoring a point-in-time copy
US9760449B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2015 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Oct 5, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Managing storage volumes in a point-in-time copy cascade. The cascade includes a first source volume, a first point-in-time target volume, and a second point-in-time target volume. The second point-in-time target volume is a point-in-time copy of the first point-in-time target volume. Upon detecting a corruption of the first point-in-time target volume the method creates a third point-in-time target volume from the second point-in-time target volume and directs I/O operations for the first point-in-time target volume to the third point-in-time target volume. The first point-in-time target volume is restored to the second point-in-time target volume and, when the restoration is complete, deletes the first point-in-time target volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.