Yea i figured something like a HTPC might have space limitations. Lesley, unfortunately, the only way to do what you described involves giving up Windows. I have assumed you want windows along with Ubuntu on your PC, because you are using dmraid. If you won't be installing windows, you don't need fake raid at all. you can use software raid already built into linux. That will allow you to set up a raid 0 and raid 5 on the same array, pretty cool :)
Yea i figured something like a HTPC might have space limitations. Lesley, unfortunately, the only way to do what you described involves giving up Windows. I have assumed you want windows along with Ubuntu on your PC, because you are using dmraid. If you won't be installing windows, you don't need fake raid at all. you can use software raid already built into linux. That will allow you to set up a raid 0 and raid 5 on the same array, pretty cool :)