System and method to keep parity consistent in an array of solid state drives when data blocks are de-allocated
US8938584B2 · kind B2 · utility
10Cited by
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20Claims
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Key dates
| Filing date | Apr 30, 2012 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Jul 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0688
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method comprises sending a first command to a solid state drive (SSD), the first command indicating that the SSD can de-allocate a first plurality of logical block addresses (LBAs), and calculating first parity data for a redundant array of independent disks (RAID) array that includes the SSD in response to receiving a first reply from the SSD indicating that the first LBAs were de-allocated by the SSD. The first parity data is calculated based upon the first LBAs including all logical zeros.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.