So far a BackupExec media server must be a Netware or Windows machine.
Netbackup supports media servers on
Server - Supported UNIX Operating Systems
- HP-UX
- HP Tru64
- Sun Solaris
- IBM AIX
Server - Supported Microsoft Windows Operating Systems
- Windows 2000
- Windows 2003
- Storage Server 2003
Server - Supported Linux Operating Systems
So I would expect support for Novell OES in NetBackup before you see it in BackupExec, but that's just an opinion