If the server has a raid controller you should be able to configure the hardware array using the config utility - something like ctrl + a (Look for instructions just after you switch the machine on). Once you have configured an array, you should be able to boot from a Fedora CD and the array should show up as a single scsi disk in the partioning screen (probably sda).
I'm agree if your hardware raid is active you'll see only one disk, and install/work like you have only 1 disk inside.
IN my experience with low cost Asus
