Under MacOS X:  newfs_msdos -F 16 creates a filesystem that seems to 
work fine under the 1.5.1 installer.

newfs -O creates an "old" format ffs filesystem that is close enough 
that fsck under the 1.5.1 installer can convert it without a lot of 
complaints, but when I go back to MacOS X it no longer recognizes it 
as "old" and won't fsck it without complaining about the directory 
sizes.  It will mount it without *obvious* problems so read-only 
access is probably reasonable.

Under OF 3 you can't boot from a msdos (FAT 16) filesystem partition on disk.

Cross my heart, strike me dead, stick a lobster on my head.
John Crichton -- Farscape, 6/15/01
h.b.hotz@jpl.nasa.gov, or hbhotz@oxy.edu