When a server is rebooted, the NetBackup processes will start due to entries in the /etc/init.d directory structure created during installation. The nbstserv process is one of these processes, and is responsible for SLP (Storage Lifecycle Policy) duplication activity.
It is not possible to prevent nbstserv from starting upon system boot.
It is possible to stop nbstserv once started with the following command:
An advanced system administrator can create a secondary script that runs the nbstserv -teminate command shortly after the /etc/rc2.d/S77netbackup script completes.
To restart nbstserv at a later time: