Prioritized memory scanning for data storage systems
US8862952B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2012 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Oct 29, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2029/0409
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data storage system configured to perform prioritized memory scanning for memory errors is disclosed. In one embodiment, the data storage system prioritizes scanning for memory errors based on a quality attribute of pages or zones of a non-volatile memory array. Pages or zones having quality attributes that reflect a lower level of reliability or endurance than other pages or zones are scanned more frequently for memory errors. When memory errors are discovered, the quality attribute of pages or zones can be adjusted to reflect a lower level of reliability or endurance. In addition, stored data can be recovered before it may become permanently lost and before a host system reads the stored data. Improved performance of the data storage system is thereby attained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.