It's not me that responsible for confguring the NetBackup media and master servers here so can't give to much detail. I get the impression from your last post your Unix box that houses the db will also be the NetBackup server? I understand from our SA that providing Unix can see the tape drives (e.g. iocan -funC tape, or whatever) configuring NetBackup is fairly straight forward e.g. install and do a device discovery.

What I can tell you is that, yes, you need the Oracle agent installed on your database server. And this is true even when the db server is also the NetBackup master server. Installing the agent is easy, you just run a shell script and then run the oracle_link script that is created during the install. The install guide is very helpful. Once this is done you're ready to go assuming that your media server is set up correctly. To create a script suitable for NetBackup to run via the master server take a look at the examples in /usr/openv/netbackup/dbext/samples/oracle.

HTH

Austin