System and method for making snapshots of storage devices
US9335931B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2011 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Jun 15, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for making snapshots of storage devices are provided. A method for making a snapshot of a volume includes setting the volume to a read-only mode, receiving an access attempt for the volume, and if the access attempt is a write access attempt, buffering information associated with the write access attempt in a buffer, and updating a snapshot indicator based on the information associated with the write access attempt, where the snapshot indicator includes block information regarding a block in the volume that is a target of the write access attempt. The method also includes if the access attempt is a read access attempt, providing read information requested in the read access attempt, where the read information is based on the volume, or a combination of the snapshot indicator, the buffer, and a buffer indicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.