Disk storage system with write preservation during power failure
US5341493A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1993 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Nov 22, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A disk storage system including means for assuring completion of data writes to a data storage disk upon failure of electrical power receives data write commands including data to be written to one or more storage disks. Temporary memory storage temporarily stores the write commands including data to be written to one or more storage disks. The system generates a disk write pending indicator associated with each datum to be written to the one or more storage disks, for indicating that the data stored in the temporary memory must be written to disk. A disk director searches the temporary memory storage for data stored in the temporary memory storage that must be written to disk as indicated by the associated data write pending indicator, for writing the data to the one or more storage disks. Also included are means for providing electrical power to the one or more storage disks, the temporary memory storage and the disk director upon the failure of main electrical power, for assuring completion of write commands stored in the temporary memory storage to one or more storage disks upon the failure of main electrical power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.