Can the contents be backed up onto the computer, both drives removed, new drives put in, and resynced?

Yes, but it is better that, after copying /drive[01]/fids/* to the computer and replacing drive(s), you simply copy everything back where it was. Syncing back is not simple, because tune files don't have meaningfull names and one cannot reproduce multiply linked playlists on the computer filesystem. By copying everything back and using sync just to rebuild the database one keeps playlist structure contained within their own 'fid' files.

Dragi "Bonzi" Raos
Zagreb, Croatia
Q#5196, MkII#80000376, 18GB green