Hybrid drive storing redundant copies of data on disk and in non-volatile semiconductor memory based on read frequency
US8560759B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2010 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Jun 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0246
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A hybrid drive is disclosed comprising a head actuated over a disk comprising a plurality of data sectors, and a non-volatile semiconductor memory (NVSM). A read frequency of a first logical block address (LBA) is maintained, and when the read frequency of the first LBA exceeds a threshold and a corresponding PBA is assigned to a data sector of the disk, first data stored in the data sector is copied to a memory segment of the NVSM. When the read frequency of the first LBA exceeds a threshold and the PBA is assigned to a memory segment of the NVSM, first data stored in the memory segment is copied to a data sector of the disk. When a read command is received to read the first LBA, a decision is made to read the first data from one of the NVSM and the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.