Method and apparatus for facilitating validation of data retrieved from disk
US6904547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2002 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Aug 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
One embodiment of the present invention provides a system that facilitates validation of data retrieved from a secondary storage device. The system operates by receiving a write request to write new data to a block of the secondary storage device, and calculating a new checksum value from the new data. The system also retrieves a current checksum value and an old checksum value associated with the block of the secondary storage device. Next, the system performs a checksum write operation to a validation device to update the current checksum value and the old checksum value, and then performs a data write operation to the secondary storage device to write the new data to the block of the secondary storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.