Backup Solution

Dear all

I am new-bee to netbackup and worked little on software...

In my DC setup several SUN SOLARIS servers are der...

Wanna take OS backup .. online and offline (single user mode)

Please suggest me options.. as its PROD critical servers so recommded is online...

How to do it.. i have started readning DOCs but its taking longer than i thought..

I can create policies and manage tapes I am taking backup of SAP data, but real challange is how to take complete OS backup for future need and i m able to restore it...

thanx in advance....