Metadata recovery method and apparatus
US10572335B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2018 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Jul 20, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/657
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention relate to the data storage field, and provide a metadata recovery method and apparatus that are applied to a storage array. The method includes: when first mapping data is intact and second mapping data is corrupted, reading each second logical block in a granularity of a size of a third logical block; obtaining logical address blocks LBA stored in granular data, to obtain an LBA range corresponding to each segment of granular data; determining, by using a correspondence between LBA ranges and identifiers of third logical blocks, an identifier of a third logical block corresponding to the LBA range of each segment of granular data; and generating, when metadata that includes the determined identifier of the third logical block does not exist in the second mapping data, metadata that includes the identifier of the third logical block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.