Storage defragmentation based on modified physical address and unmodified logical address
US7562203B2 · kind B2 · utility
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3References
31Claims
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Key dates
| Filing date | Sep 27, 2006 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Sep 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method in a storage system reads blocks having both physical addresses and logical addresses in the storage system from a first set of locations in non-volatile storage to a cache memory and determines the level of data fragmentation in the non-volatile storage. If the level of data fragmentation exceeds a threshold level, the cache memory is marked and the blocks are written to physically sequential locations with new physical addresses in the non-volatile storage at a data consistency point without changing the logical addresses of the blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.