Storage system having nonvolatile semiconductor storage device with nonvolatile semiconductor memory
US9116622B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2012 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Mar 22, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0688
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage system coupled to a host has a nonvolatile semiconductor storage device that includes a nonvolatile semiconductor memory configured by a plurality of pages, and a storage controller coupled to the semiconductor storage device. In the case where data stored in the plurality of pages become unnecessary, with this plurality of pages being the basis of a region of a logical volume based on the nonvolatile semiconductor storage device, the storage controller transmits, to the nonvolatile semiconductor storage device, an unnecessary reduction request for reducing the number of pages that are the basis of the region having the unnecessary data stored therein. On the basis of the unnecessary reduction request, the nonvolatile semiconductor storage device invalidates the plurality of pages that are the basis of the region having the unnecessary data stored therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.