>Thanks for the information - Your explaination was very clear.  My appreensio
>ns are not from the design, but rather the result of our changing directon
>when we have a large number (280) of "filling" tapes.  I have visions ofthe
>first migrations after we turn colocation off having many extra mounts bcause
>these tapes are close to being full.

You've got a legitimate concern, but I doubt the problem will be as
bad as you might think.  The server will attempt to use an empty volume
whenever it must continue a file to another tape.  Therefore, I would
expect use of the filling volumes to occur over an extended period of
time, depending on the size distribution of your files.  This means that
you probably will not see an enormous surge in mount requests during
your first few migrations.  The downside of this is that the number of
filling volumes may not be reduced as quickly as you would like.

Dave Cannon
ADSM Development