This is the really big flag for me:
"I did "devbra -devices" and got nothing on the screen."
I don't know if 'devbra -devices' will give the same output as 'devbra -dev', which is how the command should be run
Assuming that the output is accurate, this means that DP sees no locally-attached devices (Devices in a SAN are considered to be Locally Attached), you will need to reboot the HPUX media agent, which descovers all locally-attached devices, and run 'devbra -dev' again