Host I/O performance and availability of a storage array during rebuild by prioritizing I/O request
US6647514B1 · kind B1 · utility
573Cited by
10References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 23, 2000 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Mar 23, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1092
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Improved host I/O performance and availability of a storage array during rebuild is obtained by prioritizing I/O requests. In one embodiment, rebuild I/O requests are given priority over host I/O requests when the storage array is close to permanently losing data (for example, failure of one more particular disk in the storage array would result in data loss). Rebuild I/O requests continue to have priority over host I/O requests until the storage array is no longer close to permanently losing data, at which point host I/O requests are given priority over rebuild I/O requests.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.