"Ok, so RAID only works on drives not running the operating system? In other words, you have one drive to run the OS and two others to hold data and run RAID? "
This is your quote from a different thread.
RAID can run your OS. In fact a RAID1 can guard against your OS failing during a disk failure... sometimes.
"So here's the issue. I installed a new MSI 890 AMD mobo which is RAID ready. (I think.) I currently have everything installed on a 1TB Sata HD. Can I simply add another SATA drive and it will run RAID. What do I have to do?
Forgive me, I have never done this before. "
from the above thread.
Yes and no. Depending on the RAID you can do this. You should be able to mirror it (RAID1) but I know nothing of your Mobo except that AMD guys love it.
However, you have a great system. I would buy an SSD for the OS and use the RAID 1 (as you said) for storage. The SSD is such a great upgrade. Like day and night.