Dianne,

        I used to run in to the same problem when we ran ADSM on an MVS
server... we were using 3480 tapes (18 trk w/IDRC) and had 6,000+ tapes
between our 2 ADSM systems.  There weren't enough hours during the day
when the tape drives weren't busy to keep up on reclamation..  Here are
a couple of things you can try..

1) Try setting the reclamation threshold higher (75 - 85%) ... this will
reclaim the least full tapes first.  Then, as things get caught up,
gradually reduce the reclamation threshold.

2)  Instead of reclaim, use MOVE DATA to move your least full tapes back
to disk storagepools - we had a lot of success with this... I used to
generate a tape pulllist for the operators of the least full tapes, then
would use an ADSM macro to issue the MOVE DATA commands.  This worked
out well as we'd be able to process 60-90 tapes in an hour using 6-8
concurrent move processes.  You could try doing this one day a week to
clear off the least full tapes (i.e. < 25-30 MB used), then use the
reclaim method the other 2 days of the week.

Tim Pittson
tpittson AT himail.hcc DOT com
>----------
>From:  Dianne Sharp[SMTP:DSHARP AT CLEAR.CO DOT NZ]
>Sent:  Thursday, March 13, 1997 6:49 AM
>To:    ADSM-L AT VM.MARIST DOT EDU
>Subject:       Re: Questions on Tape Reclamation
>
>I didn't get an answer to these questions.  Can anyone please help?
>
>Dianne Sharp
>Operations Analyst
>CLEAR Communications, Auckland, New Zealand
>dsharp AT clear.co DOT nz
>
>>----------
>>From:  Dianne Sharp
>>Sent:  Tuesday, 04 March, 1997 5:13PM
>>To:    'ADSM User Group'
>>Subject:       Questions on Tape Reclamation
>>
>>We are running ADSM Server V1 on MVS.
>>
>>We have been doing tape reclamation regularly (3 times a week) for a while
>>now but noticed today that we still have a large number of tapes with a
>>small
>>amount of valid data on them.
>>
>>Unfortunately, we have a limited window in which to run tape reclamation, so
>>have been ending it when we require the use of the cartridge drives (i.e.
>>before it is completed).
>>We have been setting the threshold to 50%, then back to 100%.
>>
>>QUESTIONS :
>>
>>1.  Does anyone know the order in which tapes are reclaimed? (i.e. it
>>certainly doesn't appear to be in %utilised order, which is probably why we
>>are in the situation we are in.)
>>
>>2.  If a tape is 0.0% utilised and we perform reclamation on it, why does
>>the
>>tape have to be physically mounted?
>>
>>Dianne Sharp
>>Operations Analyst
>>ISS CUSTOMER SUPPORT
>>Ext 4208
>>
>