Hello Corky,
There are some necessary steps to take in order to configure your system with a RAID.
I would recommend you doing the following:
- Access the BIOS and set the chipset mode as RAID
- Access the CTRL-I and while having both drives connected to the system, create the RAID volume depending on your needs.
- Install the operating system.
You can check more information about the RAID setup at the following link:
http://download.intel.com/support/chipsets/imsm/sb/irst_user_guide.pdf