I’ve had yet to see an affordable (unless you are talking about dual Fiber Optic types) Raid config that can deliver uncompressed full HD in other then Raid0.
Yes there are solutions are available for lots of $$$$$$… but can you afford them??? Simply back up your files to external/Tape drives. Remember you don’t need sustain data rate for back up/restore, and still be cheaper in case one of your drive crash.
Yes drives do crash, just like any other electronics equipment, but you have to plan for worst and hope for best! There are always trade-offs and you go with the best solution you can afford/works for you.