Joined: 14 Mar 2007 Posts: 8629 Location: Back in jolly old England
To move a CDS in use by HSM you must bring down HSM to preserve the integrity of the CDS.
Think about it. You copy the CDS, HSM quite happily performs its functions during this copy using the original CDS, and you then flip the catalog to point to a CDS that does not have the updates recently performed.
If HSM needs to take a hit to perform this task, that is the end of the matter.
HSM cannot be brought down as is used by production continuously.
Then I would seriously take a deep long look at your storage management policies.