You can manage reserved capacity to increase or decrease the reserved capacity for a copy service object, edit the capacity settings for a copy service object, cancel a pending snapshot image, and delete a snapshot group.
Increase reserved capacity
You can increase reserved capacity, which is the physically allocated capacity used for any copy service operation on a storage object. For snapshot operations, it is typically 40 percent of the base volume; for asynchronous mirroring operations, it is typically 20 percent of the base volume. Typically, you increase reserved capacity when you receive a warning that the storage object's reserved capacity is becoming full.
Decrease reserved capacity
You use the Decrease Capacity option to decrease the reserved capacity for the following storage objects: snapshot group, snapshot volume, and consistency group member volume. You can decrease reserved capacity only by the amount(s) you used to increase it.
Change the reserved capacity settings for a snapshot group
You can change the settings for a snapshot group to change its name, auto-delete settings, the maximum number of allowed snapshot images, the percentage point at which System Manager sends a reserved capacity alert notification, or the policy to use when the reserved capacity reaches its maximum defined percentage.
Change the reserved capacity settings for a snapshot volume
You can change the settings for a snapshot volume to adjust the percentage point at which the system sends an alert notification when the reserved capacity for a snapshot volume is nearing full.
Change the reserved capacity settings for a consistency group member volume
You can change the settings for a consistency group member volume to adjust the percentage point at which System Manager sends an alert notification when the reserved capacity for a member volume is nearing full and to change the policy to use when the reserved capacity reaches its maximum defined percentage.
Change the reserved capacity settings for a mirrored pair volume
You can change the settings for a mirrored pair volume to adjust the percentage point at which System Manager sends an alert notification when the reserved capacity for a mirrored pair volume is nearing full.
Cancel pending snapshot image
You can cancel a pending snapshot image before it completes. Snapshots occur asynchronously, and the status of the snapshot is pending until the snapshot is complete. The snapshot image completes as soon as the synchronization operation is complete.
Delete snapshot group
You delete a snapshot group when you want to permanently delete its data and remove it from the system. Deleting a snapshot group reclaims reserved capacity for reuse in the pool or volume group.