Dell PowerVault MD3820f - Manual (Page 156)

Creating A Snapshot Virtual Disk
1. From the AMW, select the Storage & Copy Services tab.
2. Do one of the following:
– Select a base virtual disk, and then select Copy Services → Snapshot Virtual disk → Create. The
Select Existing Snapshot Image or New Snapshot Image window is displayed.
– Select a base virtual disk, and then select Copy Services → Snapshot Image → Create Snapshot
Virtual Disk. The Snapshot Virtual Disk Settings window is displayed. Go to step 4.
3. If you selected a base virtual disk in step 1, choose the snapshot image for which you want to create
a snapshot virtual disk. Do one of the following:
– Select An existing snapshot image and then select a snapshot image from the snapshot image
table and click Next.
– Select A new snapshot image (on an existing snapshot group) and then a snapshot group from
the existing snapshot group table and then click Next.
The Snapshot Virtual Disk Settings window is displayed.
4. In the Snapshot virtual disk name field, enter a unique name (30 character maximum) that best
describes the virtual disk selected for this snapshot image, for example, AccountingData.
By default, the snapshot virtual disk name is shown in the name text box as follows:
[base-virtual disk-name] - SV + sequence-number
In this example, SV (snapshot virtual disk) is the appended suffix and sequence-number is the
chronological number of the snapshot virtual disk relative to the base virtual disk.
For example, if you create the first snapshot virtual disk for a base virtual disk called “Accounting”, the
default name of the snapshot virtual disk is “Accounting_SV_01”. The default name of the next
snapshot virtual disk you create based on “Accounting” is “Accounting_SV_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 “SV” and the sequence string.
5. In the Map to host drop-down, specify how you want to map the host to the snapshot virtual disk.
– Map Now to Default Group – The virtual disk is automatically assigned a logical unit number
(LUN) and is accessible by any hosts that are connected to the storage array.
– Map Later – The virtual disk is not assigned a LUN and is not accessible by any hosts until you go
to the Host Mappings tab and assign a specific host and LUN to this virtual disk.
– Select a specific host – You can select a specific host or host group from the list. This option is
available only if Storage Partitioning is enabled.
NOTE: Make sure there are enough free LUNs on the host or host group that you selected to
map to a snapshot virtual disk.
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