Shingled magnetic recording drive mapping using nonvolatile random access memory for persistent updates
US11150847B2 · kind B2 · utility
0Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2019 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Jan 18, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/012
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A request for changing data of a file system data structure stored on a shingled magnetic recording (SMR) drive is received. The data change is logged in a log entry of a log structure stored in a non-volatile random access memory (NVRAM). The log entry is added as a new entry at an end of the log structure. The log entry is marked within the NVRAM as modified and a predetermined criterion is determined to be satisfied. Responsive to determining that the predetermined criterion is satisfied, the NVRAM is searched for log entries marked as modified. The modified log entries are stored to the SMR drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.