From: Mike Knight, IBM GS Central, (314)234-5096, KNIGHTM at ISSCVM
Inet:                                             KNIGHTM AT VNET.IBM DOT COM
Subject: Re: Library failure doing CHECKIN with tape process active

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 library, and
>> we have now spotted a pattern. It seems that if we CHECKIN a tape while 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 their
>slots (i.e. mounted in a drive), ADSM (V2.1) will possibly use these slots
>(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 affects 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