Dell PowerVault MD3820f - Manual (Page 154)

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.
The following guidelines apply:
• The Snapshot premium feature must be enabled on the storage array.
• To add a new member virtual disk, the consistency group must have has less than the maximum
number of allowable virtual disks (as defined by your configuration).
• If the base virtual disk resides on a standard disk group, the repository members for any associated
consistency group can reside on either a standard disk group or a disk pool. If a base virtual disk
resides on a disk pool, the repository members for any associated consistency group must reside on
the same disk pool as the base virtual disk.
• You cannot add a member virtual disk that is in a failed state.
1. From the AMW, select the Storage & Copy Services tab.
2. Do one of the following:
– Select the base virtual disk that you want to add to the consistency group and then select Storage
→ Virtual disk → Add to Consistency Group. The Select Consistency Group and Repository
window is displayed.
– Select the consistency group to which you want to add member virtual disks and then select
Copy Services → Consistency Group → Add Member Virtual Disks. The Select Virtual Disks and
Repositories window is displayed.
3. Depending on your selection in step 2, do one of the following:
– In the Select Consistency Group and Repository window, select the consistency group from the
Consistency groups table, to which you want add the base virtual disk.
– In the Select Virtual Disks and Repositories, select the member virtual disks from the eligible
virtual disks table, that you want to add to the consistency group. The eligible virtual disks table
shows only those virtual disks that are capable of being used in the consistency group. You can
click the Select all check box to add all the virtual disks displayed in the Eligible virtual disks table
to the consistency group.
4. Select how you wish to create the repository for the member virtual disk(s) you are adding to the
consistency group:
– Select Automatic and click Finish to create the repository with the default capacity settings. This
option is the recommended one.
– Select Manual and click Next to define the capacity settings for the repository and then click
Finish. See the online help topics for more information on how to set the repository parameters.
Use the Manual option if you want to specify all of the customizable settings for the repository. The
Manual method is considered advanced and only those who understand physical disk redundancy
and optimal physical disk configurations should use this method.
The new member virtual disk(s) for the consistency group are displayed in the Member Virtual Disks
table.
Removing A Member Virtual Disk From A Consistency Group
Use the Remove Member Virtual Disks option to remove a member virtual disk from an existing
consistency group. When you remove a member virtual disk from a consistency group, the system
automatically deletes the snapshot group associated with that member virtual disk. In addition, you can
choose whether you want to delete any repositories associated with the member virtual disk.
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