have you seen this issue?
I have a V480R system connected to a Sun L180 (storagetek L180). I have just REMOVED the original LTO-1 tape drives and replaced them with LTO-3 drives from HP. I did a reboot -- -r and when the system rebooted, my /dev/rmt directory was empty. I have installed the 113277-36 patch for st.conf and the like, but to no avail. I can "see" the tape drives when using Netbackup V6.0 software and attempting the add the devices via the wizard. The robot attaches properly and even shows the three tape drives - but you CANNOT attach the drives. I would suspect this issue to be caused by some fault within the st.conf and the /dev/rmt directory being empty. Have you any suggestions?
Running Solaris 9 with Dec 19, 2005 recommended patch and security cluster.
L180 has version 3.9 firmware.
Netbackup V6.0 Enterprise Server
thanks for the help

