Things are looking worse than I realized. I checked my copygroups, and
all the destinations point correctly to the BACKUPPOOL (which is my
disk pool). On Friday afternoon, I changed the thresholds on this pool to
hi=0 lo=0 and migrated everything off. I then did a MOVE DATA on every
single one of the files making up that pool. I also added a Q SESSION
display every hour -- (and yes, I have caching turned on for this pool).
BACKUPPOOL is set with Maximum Size Threshhold No Limit.

At 18:45, I do a  "UPDATE STGPOOL backuppool hi=95 lo=80 migpr=1"

Standard nightly backups start at 19:00. About 2 hours into the nightly
backups, I see the first tape mount kick in. Q SESSION shows 6
sessions backing up, and only 1 needing a  tape. An hour later,
everything is a bogged mess. I have 27 sessions in progress, 2 of
them using disk, and 25 of them waiting for/using tapes!!!!! At 00:10, a
migration kicks off.

Tonite, I'll add a "Q STGPOOL BACKUPPOOL f=d" to my diagnostics
to see if I can figure anything else out -- In the meantime, my operators
are very upset with all the tape mounts that are occuring, and it's
impacting
out regular MVS batch production as we have a shortage of drives right now.

Any more ideas?? (many thanks for the ones so far) I keep hoping it's
something dumb on my part, but I'm beginning to think it may be a bug.



Linnea Nichols

Fairfax Co. Govt, Fairfax, VA    Linnea.Nichols AT co.fairfax.va DOT us
Phone:703/324-2708                FAX: 703/324-3931