Proactive disk recovery of storage media for a data storage system
US10929256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2019 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Aug 3, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/85
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The described technology is generally directed towards proactive disk recovery that operates when a failing disk is detected in a data-protected cloud data storage system. A proactive recovery process evaluates the chunks of a failing disk one-by-one. If a system process is scheduled to handle that chunk, the chunk is skipped, with recovery delegated to the system process. For non-delegated chunks protected by mirroring, a chunk copy is read by the proactive disk recovery process from a good disk copy, and copied to a new location. For non-delegated chunks protected by erasure coding, the chunk fragment is read and validated. If a portion is consistent, the proactive recovery process stores the portion to a new location on a good disk. If a portion is inconsistent, the process initiates recovery of the portion, e.g., via a fragment recovery task, for copying to a new location on a good disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.