[Veritas-bu] STK8500 Issues [SOLVED]

The root problem was the correspondence between the ACSLS addresses and 
the Veritas (SCSI/path) Drive ID numbers.

In short:

1. Media server had 4 drives.
2. The ACSLS addresses were correct for the 4 drives, BUT...
3. The drives did not correspond correctly to the SN# + Drive Index in 
   Veritas.

Example:

INCORRECT:
ACSLS: 0,0,0,1 <-> Drive Index 3 [/dev/st/nh0c0t0l0]
ACSLS: 0,0,1,0 <-> Drive Index 2 [/dev/st/nh1c0t0l0]
ACSLS: 0,1,0,0 <-> Drive Index 1 [/dev/st/nh2c0t0l0]
ACSLS: 1,0,0,0 <-> Drive Index 0 [/dev/st/nh3c0t0l0]

CORRECT:
ACSLS: 0,0,0,1 <-> Drive Index 0 [/dev/st/nh0c0t0l0]
ACSLS: 0,0,1,0 <-> Drive Index 1 [/dev/st/nh1c0t0l0]
ACSLS: 0,1,0,0 <-> Drive Index 2 [/dev/st/nh2c0t0l0]
ACSLS: 1,0,0,0 <-> Drive Index 3 [/dev/st/nh3c0t0l0]

I had VERITAS drive indicies backwards.  The weird part of this entire 
problem was that backups worked even with the wrong addresses to the 
correct Drive Indicies within VERITAS if I ran 1 backup to each drive, 1 
media server at a time.  However, there'd always be issues if you kicked 
off backups to run to all of the drives in the robot.  I can now run 
backups at any time in any duration in any quantity and there are no 
issues.

One very important note at the bottom, be sure to check this!

Basically you just need to double and triple check that the SN#s match 
from the ACSLS's query drive output and they properly correspond to the 
Drive Index IDs via tpautoconf -t (to verify SN#).

** IMPORTANT NOTE: Something I figured out myself and then VERITAS 
confirmed it.  If you have INCORRECT addressing and you do backups to 
tapes, when the tapes are used again, they will try to go the drive that 
originally wrote them-- EVEN after you fix the addressing issue!  They 
MUST be EXPIRED first with bpexpdate -d 0 -m MEDIA_ID so they lose that 
information.  If at any point you have an addressing problem and write to 
tapes, BE SURE that you EXPIRE ALL TAPES written to during that testing 
phase before you do more testing-- after you ensure the 
address/scsi/acsls mapping is correct of course.

Hope this comes in handy for someone else trying to interface NetBackup 
with ACSLS :)

Justin.