Preserving data integrity during controller failure
US11327858B2 · kind B2 · utility
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54References
20Claims
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Key dates
| Filing date | Aug 11, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Sep 26, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7201
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and processes are disclosed to preserve data integrity during a storage controller failure. In some examples, a storage controller of an active-active controller configuration can back-up data and corresponding cache elements to allow a surviving controller to construct a correct state of a failed controller's write cache. To accomplish this, the systems and processes can implement a relative time stamp for the cache elements that allow the backed-up data to be merged on a block-by-block basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.