Error windowing for storage subsystem recovery
US5539875A · kind A · utility
15Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1994 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Dec 30, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1435
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a hierarchical, multi-level storage system, recovery from intermittent storage hardware failures is supported by establishing hardware checkpoints at storage system interfaces and by duplication of subsystem hardware within units of the storage system. When error is detected at an interface, all levels of the storage system are quiesced and backed up to a point preceding the occurrence of the error. If a hardware failure causes an error, the system is quiesced while the failed hardware is reconfigured with control logic copied from duplicate hardware. A single restart command restarts system operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.