calisun
If the motherboard & disk controller is supported by CentOS, them SME server should recognize them & nothing much for you to do. The installer should load the correct modules to suit the hardware.
If you must use hardware RAID, then select single drive installation (do not select software RAID as well). There are boot switches to select when doing the OS install.
Personally I would use software RAID1 with just 2 drives, less hassle, less dependence on specific hardware should things fail, & probably just as fast depending whether your RAID card is fake or real RAID.