System for scheduling read ahead operations if new request is sequential of last n last read requests wherein n is different on independent activities
US5619723A · kind A · utility
85Cited by
11References
5Claims
0Family size
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Key dates
| Filing date | Nov 21, 1995 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Nov 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A disk drive array with a controller which provides: dynamic remapping for grown defects in the disk drives, multi-thread request processing with a variable number of forkings, defect tracking with both logical and physical lists, guarded writes of less than a full stripe optimized by selectably using the redundancy to limit the number of sectors involved, association of multiple operations with a single disk request in order to facilitate error handling, use of an access hiatus as indication of further opportunity to rebuild data in background, and scatter/scatter (bidirectional scatter/gather) operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.