>>I am not sure if collocating a copy pool is beneficial.  It seems like the
copy pool as a disaster recovery pool would be ideal to collocate, but
if you send off tapes every day you end up with a fragmented set of
tapes for each collocation unit anyway.  To clean that up would require
bringing offsite tapes back onsite, exposing you to risk.  It is
possible to do a Move Nodedata in a copy pool, but the tapes have to be
onsite.  Perhaps there are better ways. <<

Collocating a copy pool is VERY beneficial, if you can afford it (and I might 
argue, you can't afford not to).  You CAN reclaim a offsite copy pool; TSM uses 
onsite primary pool tapes to recreate the copy pool tapes that are being 
reclaimed.  Collocating a copy pool does mean more tapes, more offsite tape 
movement, and more reclamation.  But if the purpose of your copy pool is to 
allow you to continue business after a disaster, then you most likely will be 
under pressure to restore as quckly as possible and a collocated copy pool will 
certainly make those restores run faster.

David Ehresman
University of Louisville