I can think of 2 reasons. 1) there is a file which is larger than the
MAXSIze storage pool parameter 2) You are not using a directory management
class (DIRMC in the dsm.sys) on this client so the default management class
for directories is the management class with the longest retention which may
be a tape only management class.

On Fri, 20 Nov 1998, Nichols, Linnea wrote:

> I'm pulling my hair out over this one and hope someone can help.
> I am getting tape mounts at night while clients are backing up and
> can't figure out why. I'm running the MVS server at 3.1.2. I'm doing a
> "query process" every hour, and it shows that there are no processes
> running. At the time the tape mounts occur, migration thresholds are
> set to 95 80, and there are no migration messages appearing. Space
> reclamation on both my onsite tape and copy tape pools are much
> earlier, and are to be completed 4 to 5 hours earlier than these tape
> mounts occur. All of my "maximum size file" limits on my storage pools
> show as "no limit".
>
> >From doing a "q content" and "q vol" on the tapes, it looks like the
> backups from some of my clients are going directly to my tape
> pool, and NOT to my DASD pool, but for the life of me, I can't
> figure out why!!
>
> Am I doing something wrong or something stupid? Or should I log
> this as a problem with IBM support?
>
> Linnea Nichols
>
> Fairfax Co. Govt, Fairfax, VA    Linnea.Nichols AT co.fairfax.va DOT us
> Phone:703/324-2708                FAX: 703/324-3931
>