Fujitsu ETERNUS DX S5 Series Design Manual page 167

4. NAS Functions
NAS System (NAS Volume Management)
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NAS User Volumes
A NAS user volume must have an area of 300GB for the system management area, and an area of 100GB or
more for the user area to store user data. Create a TPV with a capacity of 400GB or more for the NAS user
volume.
For example, when a 3TB NAS user volume is created, 0.3TB is reserved for the system management area and
2.7TB is reserved for the user data area.
A NAS user volume (TPV) may be up to 128TB. Note that the total TPV capacity must be smaller than the
maximum capacity of the TPP. The capacity of a NAS user volume can be expanded after it is created. When
capacity expansion is performed using ETERNUS Web GUI, select [Expand TPV] from the [Volume] screen.
Note
During the configuration phase
The following operations cannot be performed for NAS user volumes in which a shared folder exists.
• Volume deletion
• Volume formatting
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NAS Backup Volumes
NAS backup volumes are created in TPVs to back up NAS user volumes. One NAS backup volume can be created
for a NAS user volume. The maximum number of NAS backup volumes is the same as the NAS user volumes.
NAS backup volumes can be created with ETERNUS CLI or ETERNUS SF AdvancedCopy Manager. For details, refer
to "Available Functions for Each Software" (page
volumes. A backup or restore of NAS user volumes is performed with volume copy using QuickOPC.
To restore data for each file, manually copy the files to restore from the client after mounting the NAS backup
volumes.
In addition, NAS backup volumes can be backed up to and restored from remote ETERNUS DX storage systems.
ETERNUS SF AdvancedCopy Manager is required for backup/restore.
Note that the NAS backup volume is stored in a different destination from the snapshot.
Caution
During the configuration phase
A NAS backup volume must be created with the same capacity as the backup source volume.
Note
During the operation phase
Before deleting NAS backup volumes, remove client connections from the NAS backup volumes (by
unmounting [for NFS] or disconnecting the network drive [for CIFS]) and unmount the NAS backup
volumes by using the ETERNUS SF software.
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NAS Snapshot Destination Volumes
To acquire snapshots, volumes to store snapshot control information and Snapshot data. Snap Data Volume
(SDV) is a generation management volume used as the copy destination. Snap Data Pool Volume (SDPV) is used
for saving snapshot data.
SDV
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A volume that is used to store the snapshot control information. When snapshot settings are performed, an
SDV with the same capacity as the NAS user volume is created for the specified number of generations.
• SDPV
A volume that is pooled in an SDP to store snapshot data. Create an SDPV before acquiring snapshots. An SDPV
must have enough size to store snapshot. If the SDP size is insufficient, an error occurs for a snapshot.
327). NAS user volumes can be restored from NAS backup
167 Design Guide