Methods, devices and systems for physical-to-logical mapping in solid state drives
US9268682B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 5, 2012 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Feb 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7201
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data storage device comprises a plurality of non-volatile memory devices storing physical pages, each stored at a predetermined physical location. A controller may be coupled to the memory devices and configured to access data stored in a plurality of logical pages (L-Pages), each associated with an L-Page number that enables the controller to logically reference data stored in the physical pages. A volatile memory may comprise a logical-to-physical address translation map that enables the controller to determine a physical location, within the physical pages, of data stored in each L-Page. The controller may be configured to maintain, in the memory devices, journals defining physical-to-logical correspondences, each journal covering a predetermined range of physical pages and comprising a plurality of entries that associate one or more physical pages to each L-Page. The controller may read the journals upon startup and rebuild the address translation map from the read journals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.