We're moving data from un-collocated storage groups to storage groups
that will be collocated by group (OK, so we're not quite leading edge!).
We had a system before of small storage pools that mimicked collocation
by groups, so any particular group's data is grouped tightly.
If I use "MOVE NODEDATA COLLOCGROUP=" how clever is TSM in how it copies
data from the current tapes? Will it take all the data from a tape in
one pass, or will it make one pass per tape per node?