>I do not understand how you can get 50 clients on 1 disk pool to go to 20 >tapes.
Bill, If I am wrong, someone will surely correct me, but what I think happens is that when migrating the 50 clients from disk to tape, TSM will try to put each one on its own tape (as collocate says it should). So the first 20 clients each go to their own tape. Then, when client 21's turn comes around, TSM searches for a new scratch tape to hold this client. If one does not exist (because of MAX SCRATCH or simply out of scratch in the library) TSM will go back and re-use the least consumed tape in that pool for client 21 and migrates 21's data to that tape. Meaning that tape now holds 2 clients. Then for Client 22, the same thing happens: it searches for a scratch, when none are found, it finds the next least consumed tape in the storage pool and uses it. And so on... >I would think that 50 clients on 1 (collocated) disk pool will >take 50 tapes. The Disk pool would not be collocated (because it would normally be a random access pool, not sequential). But, in our example, the destination tape storage pool would be. Hope that helps a bit! Chris Murphy IT Network Analyst Idaho Dept. of Lands Office: (208) 334-0293 [EMAIL PROTECTED]