Dell PowerVault MD3820f - Manual (Page 161)

Deleting A Snapshot Virtual Disk Or Consistency Group Snapshot Virtual Disk
Use the Delete Snapshot Virtual Disk option to delete a snapshot virtual disk or consistency group
snapshot virtual disk that is no longer needed for backup or software application testing purposes. You
also can specify whether you want to delete the snapshot repository virtual disk associated with a read-
write snapshot virtual disk or a read-write consistency group snapshot virtual disk or retain the snapshot
repository virtual disk as an unmapped virtual disk.
When a snapshot virtual disk or consistency group snapshot virtual disk is deleted, the system performs
the following actions:
• Deletes all member snapshot virtual disks (for a consistency group snapshot virtual disk).
• Removes all associated host mappings.
NOTE: Deleting a base virtual disk automatically deletes any associated snapshot virtual disk or
consistency group snapshot virtual disk. You cannot delete a snapshot virtual disk that is in a virtual
disk copy with a status of In Progress.
To rename a snapshot virtual disk or consistency group snapshot virtual disk:
1. From the AMW, select the Storage & Copy Services tab.
2. Select the snapshot virtual disk or consistency group snapshot virtual disk that you want to disable
and then select one of the following:
– Copy Services → Snapshot Virtual disk → Delete. The Confirm Delete Snapshot Virtual Disk
window is displayed.
– Copy Services → Consistency Group Snapshot Virtual Disk → Delete. The Confirm Delete
Consistency Group Snapshot Virtual Disk window is displayed.
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
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