On Wed, 4 Feb 1998 16:33:41 +0100, Klaus-Peter Nischke added,
>In-Reply-To:  from Peter Hough at "Feb 4, 98 02:46:48 pm"
>
>> We have recently been experiencing problems with our ATL 2/28 librar=
y, and
>> we have now spotted a pattern. It seems that if we CHECKIN a tape wh=
ile a
>> database backup or a process to backup a storage pool is active, the=
 tapes
>> used by the process cannot be successfully dismounted from the drive=
 ...
>
>It seems, that if one attempts a checkin while some tapes are not in t=
heir
>slots (i.e. mounted in a drive), ADSM (V2.1) will possibly use these s=
lots
>(and the library inventory broken afterwards). May one could call this=
 a bug..

This sounds like a bug introduced around patch level 10 which was fixed=
 at
patch level 13.  This was discussed on this forum and I believe it affe=
cts all
platforms using any SCSI library.  For AIX servers, the APAR is IC16335=
.

If this is your problem, the options are to upgrade or never check in a=
 tape
unless all drives in the library are empty.

     Mike (Personal opinion, not ADSM support) Knight
=