Dell POWERVAULT MD3600I - Manual (Page 134)

To delete a consistency group:
1. From the AMW, select the Storage & Copy Services tab.
2. Select the consistency group that you want to delete and then select Copy Services → Consistency Group →
Delete.
The Confirm Delete window is displayed.
3. Select Delete all repositories associated with this consistency group if you want to delete the associated repository
that exists for the consistency group.
4. Type yes in the text box and then click Delete to delete the consistency group.
Changing The Settings Of A Consistency Group
Use the Change Consistency Group Settings option to modify the auto-delete settings and the consistency group
repository settings that were configured when you created the consistency group.
• Auto-Delete Settings — You can configure each consistency group to keep the total number of snapshot images
in the group at or below a user-defined maximum. When this option is enabled, the system automatically deletes
the oldest snapshot image in the group, any time a new snapshot is created, to comply with the maximum
number of snapshot images allowed for the group.
• Consistency Group Repository Settings — You can define a maximum percentage for the consistency group
member repository that determines when a warning is triggered when the capacity of a consistency group
member repository reaches the defined percentage. In addition, you can specify which policy to use when the
capacity of the consistency group repository reaches its maximum defined percentage:
– Automatically purge oldest consistency image— The system automatically purges the oldest
consistency image in the consistency group, which releases the repository’s reserve space for reuse
within the consistency group.
• Reject writes to base virtual disk— When the repository reaches its maximum defined percentage, the system
rejects any I/O write request to the base virtual disk that triggered the repository access.
1. From the AMW, select the Storage & Copy Services tab.
2. From the consistency groups category node, select the consistency group that you want to change and then select
Copy Services → Consistency Group → Change Settings.
The Change Consistency Group Settings window is displayed.
3. Change the consistency group settings as required.
4. Click OK to apply your changes to the consistency group.
Adding A Member Virtual Disk To A Consistency Group
Use the Add Member Virtual Disks option to add a new member virtual disk to an existing consistency group. When a
new member is added to a consistency group, you must also add a repository virtual disk.
Standard virtual disks and thin virtual disks are the only type of virtual disks that can be used for a consistency group.
Non-standard virtual disks, such as snapshot (legacy) virtual disks, cannot be used for consistency groups. The base
virtual disk can reside on either a disk group or a disk pool.
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).
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