System and method for storage media group parity protection
US6393516B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 2001 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | May 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2211/108
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for storage medium group parity protection stores data files and related parity information asynchronously on an array of storage media. Data files can be stored asynchronously, or synchronously in stripes as in RAIT technology, but related parity information is stored asynchronously with respect to the data files. Regions of the storage media are preferably organized into protection groups for which parity information is generated. Parity information is generated on line as data files are stored and maintained in active memory. Once a protection group is filled, the parity information is migrated to more permanent backup storage. As one example, regions of an array of N storage media can constitute a protection group, and once the regions in the protection group are filled with data, parity data for the protection group is migrated from active memory to more permanent backup storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.