Snapshot; Figure 40 Snapshot - Fujitsu ETERNUS DX500 S3 Overview

5. NAS Functions

Snapshot

Snapshot
Snapshot is a function that automatically backs up volume data at a certain point. Unlike usual backup copies,
this function only copies differential data from the source volume data. Therefore, the disk space necessary for
backup is reduced.
Acquiring snapshots of the NAS user volume enables file restore from a snapshot even if a file is deleted by mis-
take. Data can be restored from a client.

Figure 40 Snapshot

NAS user volume
Directory
ETERNUS DX
File
File
Perform differential copy
for each volume when
snapshot is acquired.
68
FUJITSU Storage ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems Overview
Copyright 2019 FUJITSU LIMITED
Snap Data Pool (SDP)
Expansion area
Supply
Acquire
Snapshot destination
RAID group
: Snapshot
P3AM-7702-29ENZ0