A little help on instant messenger from Mike Schrag and we've determined the following, based on messing with the thing and finding comments from Roger and others here on the BBS:

- The large music partitions on the Central are indeed ReiserFS.

- /etc/fstab is not used by the central.

- The central doesn't even seem to use the mount command at all. When you type mount by itself, it's supposed to enumerate everything that's mounted. On the central, that's nothing at all, it's blank.

I have another avenue of research. If that pans out, I'll get back here and post the results.