Nuts. So if I'm reading your response correctly, DSM 3.1 doesn't include ReiserFS support at all. Dang it! I thought I had all the pieces. (Hey Synology, how about releasing a version of the DiskStation with a full blown copy of Linux running?? Call it a hackers playground deluxe special limited edition and sell it with no support.)
From another thread, I pulled this command, which I think confirms that reiser is not supported since it's not even listed.
TheNAS> cat /proc/filesystems
Problem is, I don't have a desktop, only a laptop. So doing anything with a hard drive natively is a PITA. I did just buy a Seagate external expansion drive which is coming tomorrow. So, maybe I can use that housing, put the MediaVault disk in there, hook it to my laptop with linux running from a CD, and start praying. Sad thing is that I used to have a basement full of junk hardware before I decided to get away from that stuff a few years back.
If anyone has any brainstorms, please let me know. I really dont' want to resort to calling my linux-head buddy who will give me a world of grief about not having a linux workstation and how bad windows is. (didn't say I disagreed with him, just don't want the grief!)