Whether you are moving a volume SnapMirror source or qtree SnapMirror source to new systems or newer drives, as long as there is a Snapshot copy in common on the source and destination, the transition goes smoothly.
Volume SnapMirror transfers all of the Snapshot copies as part of the SnapMirror replication process.
For qtree SnapMirror, the source and destination have only one Snapshot copy in common. Different qtree SnapMirror destinations have no common Snapshot copy, unless the Snapshot copy is specifically replicated.
In a production environment, you should perform the process of moving SnapMirror relationships from one volume or system to another only in a maintenance or out-of-service window. You should also ensure that new data is not added to the original source during the move.