Method and system for improving LUN-based backup reliability
US6978280B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2000 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Sep 18, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99953
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for employing fast, but easily corrupted mass storage for reliably backing up objects, such as files and database. In a LUN-based mass storage device, a timestamp is updated or a counter incremented after each I/O operation directed to the LUN that may alter data stored on the LUN. An entity may retrieve from the mass storage and save a current timestamp or current counter for a LUN at the time a backup is made to the LUN. Later, prior to using the backup in a restore operation, the entity may re-retrieve the timestamp or counter for the LUN and compare it to the saved timestamp or counter in order to determine whether or not the backup has been potentially altered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.