You can easily determine how many "lines" of tapes you will initially break out into, based upon which of the multiple types of collocation you ultimately decide upon and how many nodes or filespaces are active, sending data to TSM storage. I would double that number to account for "tape leak", based upon historic experience. And if there are Windows clients, think more about DIRMc in that context. I think most of us implement collocation judiciously, based partly upon library cell impact, but probably more so on realities of tape drive contention. A big arrival disk pool facilitates more realistic collocation.
Richard Sims
