Hmm I hope you don't plan storing any vital data on that 3 terabytes of storage. Raid 0 will more than double your chances of a irrecoverable hardware failure. Either disk or the controller goes bad and poof your data is gone.
I use raid 0 strictly for speed, Anything on either drive is considered "erasable", everything however is backed up to a PAIR of external 2TB drives, why 2? Failsafe - I had a backup go back in the past so now I keep two copies.
Every week the entire C Drive is copied over, the first copy takes 2-3 hours after that its simply adding whatever files it doesn't have which takes less then 10-15 minutes.
I do keep two partitions on the backup drives, one for C Drive, the other for storage of misc stuff like a copy of the Aces high folder (all my gunsights and skins etc).
If that isn't confusing enough, both external drives are on two separate surge protectors, better safe then losing 500GB as I did once, and it housed all my cd keys, and documents.