o off-line rebuild with norton-reinit -dump/-restore.
      + user can restore the identical dumpfile with the old norton to
        migrate back.
      + server RVM will be as fresh as possible with minimal
        fragmentation.
      - have to purge backup volumes.

This seems best; I want data migration and little pain, but I don't
mind downtime to do it.  I have important data, but I don't have a
horde of users and 'no coda saturday' is fine, really.  But, I've
always been unclear about dump/restore.  I would like to be able to
restore and create a volume, possibly replicated, that was just like
the one I dumped.  But, if it isn't too much manual work that's
probably good enough; my server is so ancient (I think I started in
1998 or 1999) that it could use with a clean start.

A further question is whether the dump/restore changes volume ids and
fids; if so it forces a reinit of all venii that have dealt with this
server.  So it might be nice to make dump/restore spiffier.

-- 
        Greg Troxel <gdt_at_ir.bbn.com>