Snapshot acquisition method, storage system and disk apparatus
US7120768B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2002 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Jul 22, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99954
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A network attached storage (NAS) system includes a disk array unit equipped with a copy device that copies data, and a NAS processing unit that provides file service via a network and is connected via a communication path to the disk array unit. The NAS processing unit is equipped with a snapshot management device that manages snapshots. The snapshot management device of the NAS processing unit designates a physical block to be copied as a snapshot. The copy device on the disk array unit copies the designated physical block within the disk array unit to create a snapshot and stores the snapshot in a separated region. The snapshot management device of the NAS processing unit manages meta data of the snapshot data in a manner accessible by the user depending on requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.