SSD cache expansion using overprovisioned space
US8838891B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2012 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Apr 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7206
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention provides for SSD cache expansion by assigning all excess overprovisioned space (OP) above a level of advertised SSD memory to SSD cache. As additional SSD memory is needed to provide the advertised SSD memory, an offsetting portion of the OP is reassigned from excess overprovisioned space to the SSD cache. In this manner, the advertised SSD memory is maintained while continuously allocating all available excess OP to cache. The result is that all of the available SSD memory is allocated to cache, a portion to maintain the advertised SSD memory and the balance as excess OP allocated to cache. This eliminates idle OP in the SSD allocation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.