Data storage device and method for using secondary non-volatile memory for temporary metadata storage
US9836232B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2015 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Apr 15, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7201
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a volatile memory, a primary and a first secondary non-volatile memory (NVM), and control circuitry coupled to the volatile memory and the primary and first secondary NVM and configured to (a) write metadata and user data associated with a host write command to the volatile memory; (b) write the user data to the primary NVM; (c) continue to write metadata associated with each of one or more host write commands to the volatile memory, and when a first condition is met, write metadata that has accumulated in the volatile memory to the first secondary NVM; and (d) repeat (c), and when a second condition is met, then write at least a portion of the metadata that has accumulated in the first secondary NVM or the volatile memory to the primary NVM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.