Data recovery mechanisms in deduplication-enabled storage facilities
US11429495B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2020 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Dec 11, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data recovery method recovers corrupted data after a disaster event in a storage facility operating with deduplication in which copies of data are maintained between volumes through a copy services relationship. The deduplication operates with referencing domains, each having a source grain containing a reference pointing to a location where data is stored and referrers pointing to the source. The data recovery method identifies any source that is pointing to data which is corrupt and then establishes whether a copy services relationship exists between the referencing domain of the source with corrupted data and another referencing domain, in which case the other referencing domain will have a copy of the corrupted data. Provided that the copy is valid, it is written across to replace the corrupted data. The method allows corrupted source data to be recovered without having to perform a full resync or restore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.