Snapshots in a hybrid storage device comprising a magnetic disk and a solid state disk
US8909876B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2010 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Jan 28, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
One or more snapshots of data stored over a period of time are maintained in a hybrid storage device comprising a magnetic disk and a solid state disk, wherein a selected snapshot stores information that allows recovery of data that is stored in the hybrid storage device at a selected point in time of the period of time. The hybrid storage device receives an input/output (I/O) command from a computational device. A category of a plurality of categories to which the I/O command belongs is determined, wherein the plurality of categories comprise writing to an unused block, writing to a used block, reading from an unused block, and reading from a used block. In response to determining the category to which the I/O command belongs, the I/O command is handled by one of the magnetic disk and the solid state disk based on the determined category.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.