Hybrid-HDD that gives up old NAND data at the last moment
US9996303B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2014 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Feb 14, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2206/1014
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and a system are provided for improving performance of a hybrid drive including a non-volatile semiconductor memory device partitioned into blocks, each of the blocks containing a plurality of sectors, and a magnetic storage device. Performance of the hybrid drive is improved by tracking data types of each sector stored in the blocks, the data types including a first data type, which is data that is unconditionally available for host accesses, a second data type, which is data that is conditionally available for host accesses, and a third data type, which is data unavailable for host accesses, and collecting erasable blocks from the blocks of the non-volatile semiconductor memory device according to the data types. The erasable blocks include a block that contains data of the second data type, such that the host may access from this block even though this block is erasable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.