Two stage checksummed raid storage model
US9104342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2010 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Aug 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2211/109
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for writing a logical data block to storage. The method includes receiving a request to write a logical data block to a storage pool, allocating a number of physical log blocks in a RAID log and a parity block for the logical data block, and writing the logical data block and the parity block to the physical log blocks. The number of the physical log blocks are less than a number of disks storing the RAID log. The method further includes allocating space in a physical slab block in a RAID slab for the logical data block, copying data including the logical data block to the space in the physical slab block, and updating, in the RAID slab, a checksum corresponding to the physical slab block and a parity block that includes the data stripe having the physical slab block based on the data copied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.