Other collocation considerations: number of nodes in a storage pool mater and number of tape drives matter - migration takes longer because you mount more tapes
if copy pool is not also collocated, reclaim take longer because more onsite tapes have to be mounted to reclaim a given tape if copy pool is collocated and nightly backups do not mostly fill a tape per node, you will daily offsite reclaim as many tapes as you send offsite collocation make a TREMENDOUS difference in restore times of servers (as opposed to individual files) DR can be a real D if data is not collocated
