Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!mit-eddie!uw-beaver!rice!sun-spots-request
From: don@brillig.umd.edu (Don Hopkins)
Newsgroups: comp.sys.sun
Subject: read only /usr, with some writable subdirectories
Message-ID: <8902070240.AA29808@brillig.umd.edu>
Date: 10 Feb 89 22:14:48 GMT
Sender: usenet@rice.edu
Organization: Sun-Spots
Lines: 13
Approved: Sun-Spots@rice.edu
Original-Date: Mon, 6 Feb 89 21:40:12 EST
X-Sun-Spots-Digest: Volume 7, Issue 150, message 7 of 13

If you mount /usr read-only, but want to be able to write to some of the
subdirectories of /usr, you can re-mount them on top of themselves,
read-write. i.e.:

ballast:/up/3.2bin on /usr type nfs (ro,noquota) 
ballast:/usr/unimacs on /usr/unimacs type nfs (rw,noquota) 
ballast:/usr/NeWS on /usr/NeWS type nfs (rw,noquota) 

There is a symbolic link on ballast so that /usr points to /up/3.2bin, so
/usr/unimacs and /usr/NeWS are the same directories as usual, but I can
write to them from the nfs client. 

	-Don