Hi,
I've just installed a Netbackup 4.5 SAN solution with an STK L180 
having 6 LTO Ultrium FC drives, configured on an AIX 4.3.3 master/media 
server. 
The problem is after a backup the tape never gets dismounted and the 
drive goes down. I can confirm that the SSO configuration is correct, 
robtest shows that tapes mounts/dismounts to the correct drives, and 
the tape drive firmware level is latest(22U0). I've tried removing the 
the drives from SSO and configure it as normal robotic drives, but I 
still got same problem. Has anyone encountered same problem? Any 
recommendation will be highly appreciated, thanks.

Jeff Menil