Dell PowerVault MD3820f - Manual (Page 145)

the oldest snapshot image and sets the auto-delete limit to the maximum allowable snapshot limit for
a snapshot group.
• If the base virtual disk resides on a standard disk group, the repository members for any associated
snapshot group, can reside on either a standard disk group or a disk pool. If a base virtual disk resides
on a disk pool, all repository members for any associated snapshot group must reside on the same
disk pool as the base virtual disk.
• You cannot create a snapshot group on a failed virtual disk.
• If you attempt to create a snapshot image, that snapshot image creation operation might remain in a
Pending state because of the following conditions:
– The base virtual disk that contains this snapshot image is a member of an asynchronous remote
replication group.
– The base virtual disk is currently in a synchronizing operation. The snapshot image creation
completes as soon as the synchronization operation is complete.
1. From the AMW, select the base virtual disk whose data you want to copy.
2. Select a base virtual disk and then select Copy Services → Snapshot Group → Create.
The Snapshot Group Settings window is displayed.
3. In the Snapshot group name field, enter a unique name (30 character maximum) that best describes
the virtual disk selected for this group. For example, AccountingData.
By default, the snapshot group name is shown in the name text box as:
[base-virtual disk-name] - SG + sequence-number
In this example, SG (snapshot group) is the appended suffix and sequence-number is the
chronological number of the snapshot group relative to the base virtual disk.
For example, if you create the first snapshot group for a base virtual disk called “Accounting”, the
default name of the snapshot group is “Accounting_SG_01”. The default name of the next snapshot
group you create based on “Accounting” is “Accounting_SG_02”. There is a 30-character limit. After
you reach this limit, you can no longer type in the text box. If the base virtual disk is 30 characters,
the default name for the group uses the base virtual disk name truncated enough to add the suffix
“SG” and the sequence string.
4. Select Create the first Snapshot Image Now to take the first copy of the associated base virtual disk
at the same time the snapshot group is created.
5. Do one of the following to select how you want to create the snapshot group repository:
– Select Automatic and click Finish to create the snapshot group repository with the default
capacity settings. This option is the recommended one.
– Select Manual and click Next to define the properties for the snapshot group repository; then
click Finish to continue with the snapshot group creation process.
NOTE: Use this option if you want to specify all of the customizable settings for the snapshot
group repository. The Manual method is considered advanced and only those who understand
physical disk redundancy and optimal physical disk configurations should use this method. See
Creating The Snapshot Group Repository (Manually) for instructions on how to set the
repository parameters.
6. Click Finish.
The system performs the following actions:
– The snapshot group and its properties under the individual virtual disk node for the associated
base virtual disk are displayed in the navigation tree.
– If Create the first Snapshot Image Now was selected, the system takes a copy of the associated
base virtual disk and the Snapshot Image Successfully Created window is displayed.
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