>We had an issue last night in which a 3494 library went into a
>pause/intervention state last night. Although a message appeared at the ATL
>there were no messages in ADSM or in the AIX error report. ADSM simply
>stopped mounting cartridges and the processes built up.
>
>Is this lack of feedback to AIX and ADSM normal when the library goes into
>this state? Is there any automatic monitoring of the ATL possible or is a
>visual inspection all there is?

Eric - I would not say that there was a lack of feedback, per se.  ADSM saw
       that the library was in a state indicating that it was temporarily
unavailable, and ADSM reasonably waited for it.  That's what you would want.
Hardware philosophy still expects that there are machine room operators that
are there to pay attention to equipment and deal with such conditions, though
in some cases it is necessary to awaken the operator first.

    As already posted, you can use SNMP or the mtlib command to effect
monitoring and alerting.  In my shop, I already had a C-based AIX cluster
monitoring program, and to that added 3494 monitoring via the interface
defined in the SCSI Tape Device Drivers manual (see ftp.storsys.ibm.com
/devdrvr directory).  It's not difficult, and uses values defined in the
/usr/include/sys/mtlibio.h file which is installed as part of atldd.  (I'll
send sample code to anyone interested: email me DIRECTLY - not ADSM-L.)

       Richard Sims, BU