Memory system and method for controlling nonvolatile memory
US10545863B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2018 |
| Grant date | Jan 28, 2020 |
| Priority date | — |
| Expiry date | Mar 16, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7205
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a memory system manages a plurality of management tables corresponding to a plurality of first blocks in a nonvolatile memory. Each management table includes a plurality of reference counts corresponding to a plurality of data in a corresponding first block. The memory system copies, based on a first management table corresponding to a copy-source block for garbage collection, only data corresponding to reference counts of non-zero from the copy-source block to a copy-destination block, and associates physical addresses respectively indicating locations in the copy-destination block, in which the data are copied, with respective intermediate addresses corresponding to the copied data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.