AViiON 3000

Hi, I've inherited a 3700 so my 3000 is now looking for a use :-/ I expect to get DG/UX running on the 3700 (when I have some spare time to deal with those issues). It would seem wasteful to also install that on the 3000. I figure I can fill the 3000 with drives and glue other peripherals onto it and turn it into a "media machine" (i.e. support many different types of tape, disk, etc.) and file server. Choice of OS to install on it becomes an issue. It's a quad Pentium box so ideally something that supports SMP. I would *like* to find something that can support blocksizes != 512 (for my MO drives). I'd also like to find an OS that would let me treat the multiple drives as a single *big* drive (e.g., DG/UX supports virtual drives that can span multiple physical drives) so I can set up a nice /distfiles filesystem. The box will run headless. Suggestions? --don