Protect > Restore: Step 4; Snapshots; Figure 179 Protect > Restore: Step 4; Table 82 Protect > Restore: Step 4 - ZyXEL Communications NSA-2401 User Manual

9.3.3 Protect > Restore: Step 4
Figure 179 Protect > Restore: Step 4
The following table describes the labels in this screen.
Table 82 Protect > Restore: Step 4
LABEL
Path for restoring
previous
done

9.4 Snapshots

Important Notes on Snapshots
1 Snapshots can only be taken on internal volumes.
2 The NSA stores snapshots in the space on the disk array that is not used by volumes.
3 Since a snapshot is a record of changes, if very large files (typically over 1GB) are
transferred onto the volume, then that 'change' may be larger than the space available
for the snapshot causing it to become invalid.
4 Space available for snapshots can be decreased later by increasing the size of volumes,
but not increased. (Volumes can only be made bigger, not smaller.) So it's better to leave
enough unused space on a disk array when creating volumes.
5 If the disk array containing the snapshots fails, then the snapshots are lost.
6 The NSA does not take snapshots of a locked volume.
Snapshot Purging
The NSA automatically purges snapshots just before taking a new snapshot. The NSA deletes
the oldest snapshot if there is no free space remaining on the disk array (space not used by
volumes). If there is not enough disk space for the new snapshot, the NSA continues to delete
older snapshots to make more space. It is possible that all previous snapshots will be lost.
NSA-2401 User's Guide
DESCRIPTION
Type or browse for the folder to which you want to restore the backup
files. Enter the backup job's password if it has one.
Click this button to return to the preceding screen.
Click this button to save your changes back to the NSA.
Chapter 9 Protect Screens
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