Garbage collection adapted to memory device life expectancy
US11188461B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2019 |
| Grant date | Nov 30, 2021 |
| Priority date | — |
| Expiry date | Jun 21, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5641
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for adapting garbage collection (GC) operations in a memory device to an estimated device age are discussed. An exemplary memory device includes a memory controller to track an actual device age, determine a device wear metric using a physical write count and total writes over an expected lifetime of the memory device, estimate a wear-indicated device age, and adjust an amount of memory space to be freed by a GC operation according to the wear-indicated device age relative to the actual device age. The memory controller can also dynamically reallocate a portion of the memory cells between a single level cell (SLC) cache and a multi-level cell (MLC) storage according to the wear-indicated device age relative to the actual device age.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.