I recently did a clean install with Windows 7 Ultimate x64. I have 2 internal Seagate 500GB HDDs. Both are split into a 66GB partition and a 400GB partition. I have my OS installed on Disk 0 Partition 1 (66GB). I have data on Disk 0 Partition 2 (400GB) and Disk 1 Partition 2 (400GB). Disk 1 Partition 1 (66GB) is free to be used as a backup. I was going to occasionally clone the entire partition (simple back up), but I've recently decided to use RAID 1 instead. It would be much simpler if it made a copy of everything automatically.
Is is possible for me to use RAID 1 only on the OS partition of the first drive and the Backup partition of the second drive? What software do I use? (I have an external HDD if I need to move the entire OS over to it while I set up the RAID on the internal drives.)
My system info: