Administrator Guide

Renaming a Snapshot Virtual Disk or consistency group
Snapshot Virtual Disk
Use the Rename Snapshot Virtual Disk option to change the name of a snapshot virtual disk or consistency group snapshot virtual disk
when the current name is no longer meaningful or applicable.
Keep these guidelines in mind when you name a consistency group:
• Limit the name to 30 characters. Any leading and trailing spaces in the name are deleted.
• Use a unique, meaningful name that is easy to understand and remember.
• Avoid arbitrary names or names that would quickly lose their meaning in the future.
NOTE: If you try to rename a snapshot virtual disk or consistency group snapshot virtual disk with a name that is already
in use by another virtual disk, an error message is displayed, and you are prompted to choose another name.
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 > Rename. The Rename Snapshot Virtual Disk window is displayed.
• Copy Services > Consistency Group Snapshot Virtual Disk > Rename. The Rename Consistency Group window is
displayed.
3. Type a new name for the snapshot virtual disk or consistency group snapshot virtual disk and then click Rename.
Creating 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 in a synchronizing operation. The snapshot image is created when 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:
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Premium feature—Snapshot Virtual Disk