From: brian welsh [mailto:brianwelsh3 AT HOTMAIL DOT COM] 
>AIX 5.1, TSM 4.2.2.8 en 3494 ATL with 700 volumes (used about 
>620 volumes),
>and about 300 nodes. Three months ago we turned collocation 
>off because we
>have about 200 client-nodes with less then 3 GB's data 
>stored, and every
>node was using min. 1 tape, so we had a lot of tapes with low 
>utilization, long migration.
> 
>Now tape-utilization is much better, migration is much 
>faster, but yesterday
>there was a restore of an web-server (WinNT) and we restored 
>almost 2 GB and
>it took 6 hours and there were almost 70 tape-mounts.

It all boils down to what is most important. My attitude is that
restores are paramount; I would do everything I can (including buying
enough library) to minimize restore times, particularly for critical
servers.

One thing you could do is decrease large-scale restore times is to
collocate critical server data by filespace; this allows for easier
multi-threaded restores.

--
Mark Stapleton (mark.stapleton AT berbee DOT com)