- The performance information for a volume with Quality of Service (QoS) enabled or a QoS group can be obtained multiple times at regular intervals.
- A volume that belongs to a different QoS group, or a volume used as a command device or a remote command device cannot be added to a QoS group.
- If a QoS group includes a volume that belongs to a QoS group to be deleted, the QoS group cannot be deleted.