It really rather depends on what you're trying to achieve. If you are taking on a technical challenge to prove that it can be done - well, good luck -- and read no further.
If on the other hand you simply want to maintain a backup of your C: drive -- then read on!
You need to understand that SATA Raid technology (more precisely, Raid Mirroring) simply provides you with an exact mirrored copy of whatever is on your C: drive. As I understand it, the Raid adapter simply splits whatever is being written to disk into two paths and writes one set to your primary disk, and precisely the same data at the same time to the second disk in the raid set. Thus, if your primary disk physically fails completely (rather unusual these days), you can get yourself back up and running quite quickly.
However: Note Well that everything that is written to your primary disk -- be it a corrupt file, a virus or whatever -- is simultaneously written to the second disk. So the second disk isn't going to save you if you inadvertently overwrite a file, or can't use the system because of a corrupted file. I found this out the hard way - somewhat later than I needed to know!
If you're looking to use your second disk for backup, then I would strongly suggest that you simply configure it as a second disk - and copy all your files across on a regular basis. I use a nifty little (Shareware) programme called FileSync to achieve just this (it lets you copy only files that have been updated since you last wrote it. Get it from
www.fileware.com - thirty day free trial period and then you get nagged to register. (Usual disclaimer that I have nothing to do with FileWare!). Or you can use something like Acronis to keep a complete image on your second disk (though not sure whether that works under linux)
FWIW - Works for me!