In collocate-by-FS stgpools, the ability to group filespaces/nodes
together, analogous to grouping nodes together in collocate-by-group
stgpools. I have numerous nodes with multiple large filespaces which I
would like to collocate by filespace, but would still like to combine the
c: drive, SYSTEMSTATE, etc on the same tape (even across nodes) without
having to define duplicate management classes per domain (ex. 2WEEKS_BY_FS,
2WEEKS_BY_GRP).

Mark Wheeler, 3M Company