I suppose you downloaded the following driver:
When installing the OS, make sure you select the driver from the Drivers\x64\SCU folder.
Is your RAID volume larger than 2TB?
I did download the driver you referenced and I was not clear on which driver to use so, you have clarified that for me. Also, the RAID volume is only 160GB.
When I use the driver from the SCU folder, I do see the Disk as unallocated but, when I try to install to it I get an error message:
"Setup was unable to create a new system partition or locate an existing system partition. See the Setup log files for more information."
Before I hit send on the above information, I found the answer. I was installing the drivers from a USB key and I had to install it before hitting next. I had actually tried this driver earlier but the above error message made me think it was not correct.
I already marked your answer as "helpful" and I am going to try to undo that and mark it "correct". Thank you very much for your help!