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Info is a bit hard to follow and I suggest you use Matrix Storage Manager 8.8.
RAID looks like its likely set in the BIOS so is the OS on one HDD and you wish to RAID 1? another HDD of the same size without reinstalling? If so I have never done it but this is likely migration not creating.
Formatting the HDD your trying to add is not the way to do it you need to open windows disk management and delete the partition.
If your trying to RAID two other HDD's and not the OS also do the above.
Thank you for your response. I see the error of my ways, I did not realize I had to leave it unformatted. Unfortunately I could find little to no information on the web on that subject. I have managed to solve my problem another way, though. I created an image of my hard drive with Acronis and backed it up to a 3rd, non-raid drive. Then, I raided the first two drives, and restored the image to the newly raided drives (using the Acronis bootable media).