Alright, I am wondering if the RPi supports any sort of RAID… I am not very familiar with the workings of RAID (like whether it can be done with USB or not…). I have gathered from reading that it requires an onboard RAID controller or something, and am wondering if the RPi has the ability to do it. (with a powered USB hub, of course) EDIT: Just ran across a post online where someone mentioned "software RAID," so I'm guessing it would work without a RAID controller? (probably slower)
If it's possible, I'd like to look into the idea of setting up a NAS RAID setup for backups. What would be cool about it is that it would be dynamic, allowing you to add more drives in, rather than being stuck to 2 or 4, for example. I was looking around and ran across FreeNAS, which appears to be an OS dedicated to turning a computer into NAS… If the RPi supports RAID, perhaps it would be worthwhile to look into the possibility of developing an OS for this very purpose.