Storage system assuring data integrity and a synchronous remote data duplexing
US6408370B2 · kind B2 · utility
86Cited by
6References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 9, 1998 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Sep 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/82
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A primary controller operates to transmit write data and a write time to a secondary controller in the earlier sequence of the write times after reporting a completion of a request for write to a processing unit. The secondary controller stores the write data and the write time transmitted from the primary controller in the cache memory. At a time, the secondary controller stores the write data in a disk unit in the earlier sequence of the write time. These operations make it possible to guarantee all the write data on or before the reference time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.