Fault tolerant disk management system which tests failed disks during varied time intervals which are based upon the criticality associated with the failed disks
US5621887A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1993 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Apr 7, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fault tolerant disk management system supports compound disks which are mirrored, so as to tolerate single point faults in any one physical disk of the compound disk. The system further minimizes the exposure of data stored on such a compound disk arising from additional single point failures in other physical disks of the compound disk. The system may be implemented as a software method for removing a physical disk from a logical compound disk without breaking up the compound disk or any mirror of which the compound disk may be a part. The removed physical disk may then be reinserted into the compound disk and mirror after repair. Further, the system provides fault responses which may be varied in accordance with an indication of criticality of each disk to the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.