HSM will select partially full tapes for output if there are any. If there
aren't any, then it will ask for a scratch volume.
To get a list of partially full tapes, use HSEND LIST TTOC SELECT(NOTFULL)
ODS('output.dsn')
Issuing HSEND DELVOL BACKUP(MARKFULL) or HSEND DELVOL MIGRATION(MARKFULL)
on partially full volumes will mark them as full.
On 23 Nov 2016 7:04 a.m., "Tony Thigpen" <t...@vse2pdf.com> wrote:
> 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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