Data storage device and data maintenance method thereof
US9940058B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2016 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Nov 19, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5641
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a data storage device including a flash memory and a controller. The controller distributes TLC-data blocks of the flash memory into three regions, obtains three sub-prewrite data sectors according to a prewrite data sector and a logic address, determines a first TLC-data block according to the logic address, selects a new first TLC-data block with the lowest erase count from the first region when the first TLC-data block has valid data, selects two TLC-data blocks according to the new first TLC-data block, writes the three sub-prewrite data sectors into the new first TLC-data block and the two selected TLC-data blocks, and maps the first new TLC-data block and the two selected TLC-data blocks to the logic address.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.