There is a very important fact about raid you should know.
All motherboards that provide raid ,provide a 'fake raid'.
Meaning : you need the specific driver for this hardware to be loaded by the OS ,before it's actually working.
The best to do ,is to install the OS on a non-raid disk, and your actual data on raid set of disks. This'll make your life way easier ,and allows you to play around with drivers.
If you play with raid on the OS disk(set) ,there's little room to play around ,as the driver must be working before you can actually try stuff in your OS.
Read this small little intro on fake raid and grub ,and you'll see why I say this : http://www.overclockers.com/how-to-dual ... aid-array/