Help with RAID/ JBOD hard drive configuration

Hey all,

So I have 3 SATA hard drives all hooked up to the same mobo, and the mobo has a built in RAID controller. So I combined all three drives in a JBOD configuration, now they appear as one big drive. Unfortunately, Windows 7 as well as Ubuntu will not install correctly... Something I'm missing? Do I have to load a driver in the case of Windows 7?

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