performing a maintenance task

Hi All,
I need help in performing a maintenance task in one of our NBU environment,
we are in the plan of rebooting the NBU server in one of the Location as part of Maintenance, AS this task is assigned to me for the first time.
This Master server runs on Linux OS and it has 50+ media server connected to it with difference OS flavors.
We have the IBM 3500 series Tape Library,
Can someone assist me in the procedure in performing this activity as a successful one. It would be appreciated if there is any proposal document explains step by step procedures.

Thanks..