else can help.

The problem - A Macintosh client was doing it's first backup via the
scheduler.  It asked for a tape mount.  I can't determine why.

The Mac is in the same management class as most of the rest of our users.  The
first pool is to disk - the pool would appear to have 150M available to it
(The pool size is 1G; 85% was available for migration, utilization was 100%,
cache was enabled).  The largest single data set that I could see on the
machine in a quick inspection was 1M in size.  Total size of the disk was
160M.  Compression was forced on by the server.

The disk pool does NOT have a size limit set for data sets - it simply
migrates to the next pool (tape) when it reaches 90% full.  There was one
other large user trying to backup at the same time - is it possible that he
had "reserved" what was left of the free space, forcing my MAC user directly
to tape?

Any ideas anyone?

Jerry Lawson