Media manager cache with integrated drift buffer
US10599575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2018 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Aug 17, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5641
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method to cache memory requests while accounting for phase change memory cell drift is described. The method includes adding, in response to receiving a write memory request from a host system, an entry to a cache that includes user data of the write memory request, wherein the write memory request is directed to a set of phase change memory cells; adding, in response to receiving the write memory request, an entry in a first content-addressable memory (CAM), wherein the entry in the first CAM includes a reference to the entry in the cache that includes the user data of the write memory request; writing the user data of the write memory request to the set of phase change memory cells; and adding an entry to a second CAM, wherein the entry in the second CAM includes a reference to the entry in the cache that includes the user data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.