We have almost the exact same environment.
2 Brocade switches
3 Crossroads bridges (3200&3250)
2 STK L180's 
 5 DLT7000 drives in #1
 4 SDLT drives in #2
1 Sun L1800
 4 DLT7000 drives
Solaris 2.6 master/media server (E450)

We have done multiple things to fix some of
our problems so far.  We replaced one of the
3250 bridges.  We changed the st.conf file
to use Veritas' recomendation for SDLT rather than
Quantum's.  We also have had another problem.
We were trying to bring SSO into the picture
and loaded the media manager software on a
second Sun box.  Everytime we would bring
the daemons up on this box after creating the
storage unit it would try to reserve the drives.
This would cause this exact problem to happen.
We have since turned off the 2nd media manager
until we resolve some other issues (1-2 week
schedule).  

Also look for SCSI tran_error messages
in the /var/adm/messages.  We often see these
shortly before we get media write errors (#84)
and are still trying to sort these out.

Good Luck,

Ken Sibley
Sr. Unix Administrator
Accor Economy Lodging
ksibley AT accorel DOT com
469-737-3370

> -----Original Message-----
> From: David A. Chapa [mailto:david AT xbpadm-commands DOT com]
> Sent: Thursday, January 03, 2002 3:06 PM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] STK L700-Drives down
> 
> 
> here's one for the group to hash out with me.
> 
> STK L700, Solaris 2.6 Master, v 3.4.1, Brocade Switches, 
> Crossroads Bridges,
> SSO.
> 
> My client has been having an issue with TWO particular drives.  When a
> backup job requests a tape mount, the library satisfies that 
> request, but
> never 'mounts' the tape.  It eventually writes to the syslog 
> that the tape
> is in a down'd drive.  Its only these two drives.
> 
> They have replaced the drives, the bridges and now have asked 
> me to look
> into it.  I took a pretty close look at it today, I think it 
> is hardware.
> The reason I am leaning there, is when I attempted to 
> dismount the tape from
> the L700 panel, the command failed.  Netbackup at that point 
> had already
> given up on the two drives and I had already killed the 
> backup jobs, so
> there was nothing special going on with the NBU server.
> 
> Any thoughts out there?
> 
> Thanks
> 
> David
> 
> <><><><><><><><><><><><><><><><><><><><>
> David A. Chapa
> NetBackup Consultant
> DataStaff, Inc.
> http://www.consulting.datastaff.com
> 847 413 1144
> ---------------------------------------
> NBU-LSERV AT datastaff DOT com - Adv. Scripting
> http://www.xbpadm-commands.com
> 
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