Hybrid-HDD with multiple caching modes
US9965181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2015 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Jun 1, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Data is stored in a hybrid HDD that includes a magnetic storage medium and a nonvolatile solid-state device according to multiple modes of operation: a full caching mode, a transitional caching mode, and an HDD only mode. The mode of operation may be selected based on the current condition or performance of individual storage regions in a nonvolatile solid-state device of the hybrid HDD, or on the current condition or performance of the nonvolatile solid-state device as a whole. As the nonvolatile solid-state device undergoes wear, performance of the hybrid HDD is maintained by using less reliable memory blocks in the nonvolatile solid-state device as a read cache, even when these memory blocks are considered too unreliable to store dirty data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.