Snapshot acquisition method, storage system and disk apparatus

Details Snapshot acquisition method, storage system and disk apparatus Snapshot acquisition method, storage system and disk apparatus

2006-10-10

2006-10-10

Moazzami, Nasser (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S161000, C707S793000, C707S793000

Reexamination Certificate

active

07120768

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.

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