Remote system directories

[Andrew P.]

Hello!

I've got a freebsd box with a 2Gb hard drive and a server with a lot of 
free space. I want to make use of nfs and let the "small" box mount most 
of its directories in read-write mode from the server. What directories 
are safe to be moved to a remote location? The idea is that should the 
server go down, the box must still be bootable and accessible via ssh.

I've read hier manual page, but it doesn't go deep into how bad the 
system need each directory at startup - and how heavy access is to each 
folder during normal operation.

Can the system boot into multi-user mode in case /usr fails to mount? 
I'm now experimenting with different subfolders of /usr and other dirs, 
and I'd be glad to hear a piece of advice.

Best wishes,
Andrew