Hi,
    I ran into a somewhat annoying problem today with my virtualized NetBSD 
system.  The fact of it is that I made a simple one-letter mistake in 
/etc/fstab which prevented /usr from mounting properly.  I managed to fix it 
by putting in the install floppy I'd used to boot initially and running 
/bin/sh, mounting the file system and editing the file with ed.  I know this 
works, but it isn't as ellegant as I'd like.  The reason I had to do it this 
way was that I couldn't get the boot prompt to show up.  Kermit just wasn't 
fast enough, or I just wasn't fast enough.  I suspect the timeout is 0 
seconds by default.
    I tried installboot to fix the problem, but can't do it from my system 
in a normal state because the root filesystem is busy, and any attempt 
installboot makes to mount it read/write returns that error.
    All that being said, I wonder if anybody could give me a way to do this? 
I saw the following in installboot(8):
installboot -v -o timeout=30 /dev/wd0a /usr/mdec/bootxx_ffsv1
    (If Outlook Express screws up the formatting on that above line, I 
apologize.)  Anyway, that didn't work for me as I expected, though I did add 
console=com0, for the serial console.
Thanks much, and sorry for the sillyness of this question.
All the best,
Zack.