Quiescing mirror and vault relationships
You can use System Manager to quiesce a destination volume to stabilize the destination before creating a Snapshot copy. The quiesce operation enables active data transfers to finish and disables future transfers for the mirror and vault relationship.
The mirror and vault relationship must be in a Snapmirrored state.
Click Protection > Volume Relationships.
Select the mirror and vault relationship that you want to quiesce, and then click Operations > Quiesce.
Select the confirmation check box, and then click Quiesce.
If there is no transfer in progress, the transfer status is displayed as Quiesced. If a transfer is in progress, the transfer is not affected, and the transfer status is displayed as Quiescing until the transfer is complete.