Virtual NAND capacity extension in a hybrid drive
US9208101B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2013 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Feb 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7201
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for virtual cache memory extension in a data storage device are disclosed herein. The storage device may include a memory that serves as a cache to a primary memory. The method for the storage device may include maintaining mapping information of one or more logical block addresses associated with data stored in the cache memory and maintaining mapping information of one or more logical block addresses associated with data not stored in the cache memory. Data stored in the cache memory may be selected for eviction when the available capacity of the cache memory changes, e.g., due to storing resume data in a hibernate operation. Data selected for eviction may be transferred to the primary memory but still tracked as being part of a virtual extended cache, and thus can be quickly restored into the cache memory when the resume data is no longer needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.