Administrator Guide

The Select or Create a Snapshot Group window is displayed.
2. Do one of the following:
• If snapshot groups exist on the base virtual disk or if the base virtual disk already has the maximum number of snapshot groups,
the An Existing Snapshot Group radio button is selected by default. Go to step 3.
• If the base virtual disk does not contain any snapshot groups, the following message is displayed: There are no existing
snapshot groups on this base virtual disk. Use the option below to create a new snapshot
group. You must create a snapshot group on the base virtual disk before you can proceed. Go to step 4.
3. If you want to create a snapshot image on an existing snapshot group:
a. Select a snapshot group from the existing snapshot group table.
NOTE: Ensure that you select a snapshot group that has not reached its maximum limit of snapshot images.
b. Click Finish to automatically complete the snapshot image creation process and then go to step 5.
4. If you want to create a snapshot group for the snapshot image, you must select how you want to create the snapshot group
repository. Do one of the following:
• Select Automatic and click Finish to create the snapshot group repository with the default capacity settings. This is the
recommended option. Go to step 5.
• Select Manual and click Next to define the properties for the snapshot group repository. Then click Finish to continue with the
snapshot image creation process. Go to step 5.
NOTE: Use this option if you want to specify all the customizable settings for the snapshot group repository. The
Manual method is considered advanced. It is recommended that you fully understand physical disk consistency
and optimal physical disk configurations before proceeding with the Manual method.
NOTE: Make sure you have either existing repositories, enough free capacity nodes, or available unconfigured
capacity for the storage array on which you are creating the snapshot group repository, otherwise you cannot
create the repository and an error message is displayed.
5. Click Finish.
The system takes a copy of the associated base virtual disk. The snapshot image and its properties are displayed in the navigation tree
for the associated base virtual disk.
Canceling a pending snapshot image
Use the Cancel Pending Snapshot Image option to cancel a snapshot image that was put in a Pending state when you attempted to
create the snapshot image for either a snapshot group or a consistency group.
The snapshot image is in a Pending state due to the following concurrent conditions:
• The base virtual disk for a snapshot group or one or more member virtual disks of a consistency group that contains this snapshot
image is a member of an asynchronous remote replication group.
• The virtual disk or virtual disks are currently in a synchronizing operation.
The snapshot image creation operation completes as soon as the synchronization operation is complete. To cancel the pending snapshot
image creation before the synchronization operation completes, do the following:
1. From the AMW, select either the snapshot group or consistency group that contains the pending snapshot image.
2. Do one of the following:
• Copy Services > Snapshot Group > Advanced > Cancel Pending Snapshot Image.
• Copy Services > Consistency Group > Advanced > Cancel Pending Consistency Group Snapshot Image.
Deleting snapshot image
Use the Delete Snapshot Image option to delete the oldest snapshot image from a snapshot group or consistency group.
After a snapshot image is deleted from a snapshot group, the system performs the following actions:
• Deletes the snapshot image from the storage array.
• Releases the repository’s reserve space for reuse within the snapshot group.
• Disables all the associated snapshot virtual disks that exist for the deleted snapshot image.
For a consistency group you can delete:
• A single snapshot image.
• Multiple snapshot images that have the same sequence number and creation timestamp.
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Premium feature—Snapshot Virtual Disk