Dell POWERVAULT MD3600I - Manual (Page 142)

3. If the snapshot virtual disk or the consistency group snapshot virtual disk is read-write, select the option to delete
the associated repository.
4. Type yes in the text box and then click Delete to delete the snapshot virtual disk or consistency group snapshot
virtual disk.
Creating A Consistency Group Snapshot Virtual Disk
A consistency group snapshot virtual disk comprises multiple snapshot virtual disks to provide host access to a
snapshot image that has been taken for each selected member virtual disk at the same moment in time. The consistency
group snapshot virtual disk can be designated as either read-only or read-write. Read-write consistency group snapshot
virtual disks require a repository for each member virtual disk that you select in the wizard to save any subsequent
modifications made by the host application to the base virtual disk without affecting the referenced snapshot image.
Each member repository is created at the same time the consistency group snapshot virtual disk is created.
The following guidelines apply:
• The Snapshot premium feature must be enabled on the storage array.
• The consistency group must contain at least one member virtual disk before you can create a consistency group
snapshot virtual disk.
• There is a maximum allowable limit to the number of snapshot images for a consistency group (depending on
your configuration).
• You cannot create a snapshot virtual disk of a failed virtual disk.
• Snapshot virtual disk repositories are fully resizeable. If you have the storage capacity you can increase the size
of the snapshot repository to avoid a repository full message. Conversely, if you find that the snapshot virtual
disk repository is larger than you need, you can reduce its size to free up space that is needed by other logical
virtual disks.
NOTE: If you attempt to create a snapshot virtual disk for a snapshot image and that snapshot image is in a pending
snapshot image creation operation, it is due to 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 is created as soon as
the synchronization operation is completed.
To create a consistency group snapshot virtual disk:
1. From the AMW, select the Storage & Copy Services tab.
2. Do one of the following:
– Select a consistency group, and then select Copy Services → Consistency Group → Create Consistency
Group Snapshot Virtual Disk. The Select Existing Snapshot Image or New Snapshot Image window is
displayed. Go to step 3.
– Select a consistency group snapshot image from the Consistency Group Snapshot Images table, and then
select Copy Services → Consistency Group Snapshot Image → Create Consistency Group Snapshot Virtual
Disk. The Consistency Group Snapshot Virtual Disk Settings window is displayed. Go to step 4.
3. If you selected a consistency group in step 2, select the consistency group 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 consistency group snapshot
images table and click Next.
– Select A new snapshot image and then a snapshot group from the existing snapshot group table and then
click Next.
The Consistency Group Snapshot Virtual Disk Settings window is displayed.
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