Administrator Guide

• You want to maximize the storage array performance by stopping write activity to the snapshot repository virtual disk.
If you decide to re-create the snapshot virtual disk or consistency group snapshot virtual disk, you must choose a snapshot image from
the same base virtual disk.
If you disable the snapshot virtual disk or consistency group snapshot virtual disk, the system performs the following actions:
• Retains the World-Wide Name (WWN) for the snapshot virtual disk or consistency group snapshot virtual disk.
• Retains the snapshot virtual disk or consistency group snapshot virtual disk’s association with the same base virtual disk.
• Retains the snapshot virtual disk or consistency group snapshot virtual disk’s associated repository—if the virtual disk is designated as
read-write.
• Retains any host mapping and access (any read-write requests fail).
• Removes the snapshot virtual disk or consistency group snapshot virtual disk’s association with the current snapshot image.
• For a consistency group snapshot virtual disk, disables each member’s snapshot virtual disk.
NOTE: If you are finished with the snapshot virtual disk or consistency group snapshot virtual disk and do not intend to
re-create it later, you must delete the virtual disk, instead of disabling it.
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 > Disable. The Confirm Disable Snapshot Virtual Disk window is displayed.
• Copy Services > Consistency Group Snapshot Virtual Disk > Disable. The Confirm Disable Consistency Group
Snapshot Virtual Disk window is displayed.
3. Type yes in the text box and then click Disable to disable the snapshot virtual disk.
The snapshot virtual disk or consistency group snapshot virtual disk is displayed in the Logical pane with the Disabled Snapshot
status icon. If you disabled a read-write snapshot virtual disk or consistency group snapshot virtual disk, its associated snapshot
repository virtual disk does not change status. The write activity to the snapshot repository virtual disk stops until the snapshot virtual
disk or consistency group snapshot virtual disk is re-created.
Re-creating a Snapshot Virtual Disk or consistency group
Snapshot Virtual Disk
Use the Re-Create option when you want to re-create a snapshot virtual disk or consistency group snapshot virtual disk that you
previously disabled. Re-creating a snapshot virtual disk or consistency group snapshot virtual disk takes less time than creating a new one.
If you have a snapshot virtual disk or consistency group snapshot virtual disk that you no longer need, you can reuse it (and any associated
snapshot repository virtual disk), instead of deleting it, to create a different snapshot virtual disk or consistency group snapshot virtual disk
of the same base virtual disk. You can re-associate the snapshot virtual disk or consistency group snapshot virtual disk with the same
snapshot image or a different snapshot image as long as the snapshot image is in the same base virtual disk.
NOTE:
If the snapshot virtual disk or consistency group snapshot virtual disk is part of an online copy relationship, you
cannot perform the Re-create option on the virtual disk.
Keep these important guidelines in mind when you re-create a snapshot virtual disk or consistency group virtual disk:
• The snapshot virtual disk or consistency group snapshot virtual disk must be in either an Optimal status or Disabled status.
• For consistency group snapshot virtual disk, all member snapshot virtual disks must be in a Disabled state before you can re-create the
consistency group snapshot virtual disk.
• You cannot re-create an individual member snapshot virtual disk, you can re-create only the overall consistency group snapshot virtual
disk.
• All write data on any associated snapshot repository virtual disk is deleted. Snapshot virtual disk or consistency group snapshot virtual
disk parameters remain the same as the previously disabled virtual disk parameters. The original names for the snapshot virtual disk or
consistency group snapshot virtual disk are retained. You can change these names after the re-create option completes.
To re-create 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 > Re-create. The Confirm Re-Create Snapshot Virtual Disk window is displayed.
• Copy Services > Consistency Group Snapshot Virtual Disk > Re-create. The Confirm Re-Create Consistency Group
Snapshot Virtual Disk window is displayed.
3. Select whether to re-create the snapshot virtual disk or consistency group snapshot virtual disk using an existing snapshot image, or a
new snapshot image and then click Re-create.
Premium feature—Snapshot Virtual Disk
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