Good Day Joe,
To confirm your goal here is to get where the (stubbed archiver data is stored) from Library A to new Library B correct? And during this goal your concern is to not have the data recalled during the process?
1) The best method to achieve moving the data would be with a Synchronous Auxiliary copy, this method will copy only the data ( and should not trigger recalls), Once all the data has been successfully copied from A to B you can promote that copy to be the new Primary Copy. The demoted copy can then be deleted. I highly recommned testing the promoted copy for recalls and data consistencty before doing any deletions though.
2) Alternatley if you already have a secondary copy of this data you could also use that copy to copy from using the same priniciples as above to get the data to the new disk target. This option is good becuase while the aux copy is running the users could still access freely the archived data will the aux copy runs.
Hope this helps,