Same result, less work for you (in my opinion):
Set up your new devclass and tape pools, do whatever testing you want to
do to make yourself comfortable that the hardware is OK.
-Switch your DB Backupsto the new devclass
-RENAME your old primary pool to PRIMARYNAME-OLD
-RENAME your old copy pool
Hi Geoff
Switch your DB backups to the new technology and start shipping offsite.
(run DBsnapshots to the old technology if you are a nervous nellie)
Create another copypool on the new technology. Run a backup stg whenever
you have some spare cycles/drives until the pool is up to date. Then star