Methods and systems for dynamically distributing disk array data accesses
US6484235B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1999 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/415
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention is related to methods and systems for reducing head movements during accesses to drives within a drive array by dynamically selecting which one of a first drive and a second drive is to be used to read data stored within a first logical address range. A first set of data is stored in both the first drive and the second drive. The logical block addresses accessed by at least a portion of read operations are monitored. The first drive is designated as a data source for data stored on both the first drive and the second drive in the first logical address range. The second drive is designated as a data source for data stored on both the first drive and the second drive outside the first logical address range. The designation of drives is performed at least partly in response to the monitoring act.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.