System and method for tracking block level mapping overhead in a non-volatile memory
US9921956B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2016 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Sep 28, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7205
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method is disclosed for tracking block mapping overhead in a non-volatile memory. The system may include a non-volatile memory having multiple memory blocks and a processor configured to track a block level mapping overhead for closed blocks of the multiple memory blocks. The processor may be configured to track predetermined logical address ranges within which data written to a block fall, and then store the sum of the number of different logical address ranges for each respective block as a block address entropy metric. The method may include the processor using the block address entropy metric to select source blocks for garbage collection with a lower block address entropy metric or to adjust other operational characteristics such as data routing within the non-volatile memory system based on average block address entropy for a group of blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.