Warmswap of failed memory modules and data reconstruction in a mirrored writeback cache system
US6571324B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1997 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Jun 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/74
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A warmswap operation to replace modules in a mirrored cache system has been accomplished by disabling mirrored write operations in the cache system; testing the replacement memory module in the cache system; and restoring the mirrored data in the cache system. The restoring operation is accomplished by first quiescing write operations to stop writing data in the cache system not backed up in non-volatile data storage. Then data is copied from surviving memory modules to the replacement module, and the cooperative interaction of the surviving memory modules with the replacement memory module is validated. The validating operation verifies the cache modules are ready and the controllers are synchronized. After validation the quiesced write operations are un-quiesced, and mirrored-write operations for the cache system are enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.