Method and system for providing logically consistent logical unit backup snapshots within one or more data storage devices
US6718447B2 · kind B2 · utility
21Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2001 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Jun 30, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for providing logically consistent backup copies of a logical unit provided by a data storage device, and for managing and maintaining a pool of increasingly stale backup copies within the data storage device. Backup logical units within the pool are continuously recycled, so that the least recently current backup logical unit is next synchronized and activated to receive mirror I/O requests. A trigger I/O request is provided to allow an application program running on a host computer to signal points within a stream of I/O requests that represent logically consistent states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.