FWIW, I've seen drives become unavailable, too, with no
indication (either in the ADSM logs or in errpt) of why.
Also ADSM 3.1.1.5 on AIX 4.2.1, though my library is an IBM 7337
(also DLT).

Pat Wilson
paw AT dartmouth DOT edu


>  Hello there!
>
>  I have come across a minor problem that puzzles me. We are running ADSM
>  3.1.1.5 on AIX 4.2.1 with an attached STK9730 DLT library with two
>  drives.
>
>  After checking the activity log this morning, I noticed that the
>  scheduled admin command we set up to backup up the database ran
>  successfully, but the actual backup process failed.  The reason was
>  "Insufficient number of mount points."  I checked the online status of
>  the drives and both said "Unavailable since 3/11/99 8:05:10"  Now,
>  that's the exact time the backup database schedule takes off.  In
>  addition, there were 6 "Storage Subsystem Failure" messages in the AIX
>  error log.
>
>  I updated the drive online status for both drives to yes and kicked off
>  a db backup and it worked just fine!  I guess my question is "What in
>  the world would cause both drives to suddenly become unavailable?"  Has
>  anybody run into a similar problem?  The activity log doesn't tell me
>  why they became unavailable, is there any place else I can check for
>  more info?
>
>  Thanks a lot!!!
>  adam
>  __________________
>  Adam Slesinger
>  Corporate Information Systems
>  Brown & Sharpe, RI
>  Phone: (401) 886-2236
>  Email: aslesinger AT us.bnsmc DOT com