Dell PowerVault 725N (Rackmount NAS Appliance) - Manual (Page 45)

4. Click Persistent Images.
5. In the Tasks list on the Persistent Images page, click New.
6. In the menu that is displayed, select the Volume(s) to preserve.
Consider the following when selecting the volume(s):
l You can take persistent images only of volumes with drive letters, not volumes mounted to a directory (mount points).
l If volumes are not protected by RAID 1 or RAID 5, or if volumes are frequently being added and removed, it is recommended that you make
persistent images of individual volumes. Because multivolume persistent images are linked to each other, a multivolume persistent image may
become inaccessible if one volume in the multivolume persistent image fails or is removed from the system.
7. Select the Read Only or Read/Write attribute.
8. Select the retention weight for the persistent image.
9. Confirm the persistent image name.
You can use patterns in the persistent image name to differentiate your persistent images. For example if you use a pattern of Snapshot.%i and you
take two persistent images, you have Snapshot.1 and Snapshot.2. The default persistent image name pattern is Snapshot %M-%D-%Y %H.%m.%s.
Valid pattern macros are as follows:
l %M = Month
l %D = Day
l %Y = Year
l %h = Hours in 12-hour format
l %H = Hours in 24-hour format
l %m = Minute
l %s = Second
l %i = Instance, which increments once per instance
l %a = AM/PM
l %W = Day of the week
l %w = Three-letter day of the week
l %% = Percent sign
10. Click OK to create the persistent image.
Deleting a Persistent Image
1. Log in to the NAS Manager.
2. Click Disks.
3. Click ActiveArchive.
4. Click Persistent Images.
5. Click the check box next to the persistent image that is to be deleted.
6. In the Tasks list, click Delete.
7. Click OK to delete the persistent image.
Undoing Writes to a Read/Write Persistent Image
To undo writes to a read/write persistent image, you must select an item from the Persistent Images list and then click Undo in the Tasks list.
To undo persistent image writes, perform the following steps:
1. Log in to the NAS Manager.
2. Click Disks.
3. Click ActiveArchive.
4. Click the persistent image to be restored to its original state.
5. In the Tasks list, click Undo.
6. Click OK to restore the image or Cancel to leave it intact.
Setting Persistent Image Retention Weights and Read Only or Read/Write Attributes
To change the read only or read/write attribute or the retention weight (deletion priority) of an image, you must edit the persistent image properties by
selecting an image from the Persistent Image list, and then clicking Properties in the Tasks list.
To edit the persistent image properties, perform the following steps:
NOTE: To select multiple volumes, press and hold <Ctrl> and select all volumes that are to be included in the persistent image.