Method and apparatus for preventing the use of corrupt data in a multiple disk raid organized storage system
US5581690A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1995 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Jun 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2211/1009
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage system having a plurality of disks arranged into a RAID array and a logging process and apparatus that identifies corrupt or invalid data and which prevents the corrupt or invalid data from being sent to a user application or used in any computations internal to the functioning of the array. In the preferred embodiment, a plurality of status bits, each having a first and second state are associated with each data block and parity block. If the status bit indicates that the block may contain corrupt or invalid information then that block is not used in regenerating data for an unavailable block or sent to a user application upon a read request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.