HSM is not my ballgame, but I am tasked with figuring out this puzzle,
so bear with me. As for background, the shop attempts to run lights-out
24/7.
Once a week, HSM performs an AUTOBACKUP. Until about 3 months ago, if
nobody was at the shop, HSM would ask for an exiting tape, wait 10
minutes, and if no tape was mounted, it would ask "Can tape be
mounted?". If our remote operator replied 'N', then HSM would us a
scratch tape. About once ever month or so, we would run a recycle job to
combine all the tapes.
About 3 months ago, we had some internal discussions about 'fixing' this
so that it would just use scratch tapes without asking for an existing
tape. The next thing we knew, the weekly tapes would automatically use a
scratch tape. This was good. I assumed that one of the other guys had
changed something.
Then came the time change and the resulting IPL. Now everything is
different. It seems to work the way it did prior to 3 months ago, except
for one problem. When the operator replies that the tape can not be
mounted, instead of HSM using a scratch tape, it now asks for another
HSM tape. After about 4 hours of this last week, I got in my car and
went down an mounted the tape. (I am the only one that lives in the same
town as the processor.)
Discussions with all the 3 others involved in the discussion 3 months
ago came back with "I did not change anything 3 months ago."
But, the other 2 guys that know HSM also say "We are busy. If you want
it different, figure it out and change it."
Key items I see in the config file are:
SETSYS
PARTIALTAPE(
BACKUP(MARKFULL) -
MIGRATION(MARKFULL))
SETSYS
SELECTVOLUME(
BACKUP(SCRATCH)
MIGRATION(SCRATCH) -
DUMP(SCRATCH))
SETSYS
RECYCLEPERCENT(33)
MAXRECYCLETASKS(1)
SETSYS
TAPEUTILIZATION(
UNITTYPE(3590-1) PERCENTFULL(97))
SETSYS
TAPESPANSIZE(100)
(And the output of HSEND QUERY SETSYS is the same.)
The last update date stamp on the config files was 15/12/22.
So, I have come to the conclusion that somebody issued a command to HSM
but did not update the config file so it would be handled at the next IPL.
Looking for any input.
--
Tony Thigpen
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