You can pull UC 10 bit SD from a FIrewire 800 drive that has 2 drives stripped okay but it is at its limit. If you are doing any composition of layers it is hard to pull through. You are looking at just under 200 GB of space.
DV is not the end of the world but I would never use it if the footage was shoot on DBeta, why throw away all that infomatiion. Going from DV to DVD is not the best.
One compromise is to use DVCPro50 instead of UC (50GB). It is much easier on the drives and it will hold up much better than DV(25). DVCPro50 is only 8-BIt though.
If you have the footage captured as 10-Bit UC and it is taxing on your drives you could always convert the footage to DVCPro50. You can go down without a problem so this is the safest way to go.