Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!ncar!gatech!rutgers!cmcl2!panix!eravin
From: eravin@panix.uucp (Ed Ravin)
Newsgroups: comp.unix.aix
Subject: How do I unmount /usr -- solution
Summary: csh "C" shells by the kshore
Message-ID: <1991May14.182834.10661@panix.uucp>
Date: 14 May 91 18:28:34 GMT
Sender: eravin@panix.uucp (Ed Ravin)
Organization: Newsaholics Annonymous
Lines: 30

To clear a few things up, and as a contribution to the FAQ (Bjorn?  Are you
out there, Bjorn? :-), here's a checklist for unmounting /usr under AIX on
an RS 6000 -- 

First, you have to go to single user mode or otherwise knock down all
them daemons who are referencing /usr:

# init 0

Then, unmount anything mounted under /usr.  If you have the CD-ROM for
info "hypertext" documentation, this means you.
# umount /dev/cd0

Shut down the error daemon, who still lives on even in runlevel 0:
# /usr/lib/errstop

Last, but by no means least, you need to tell your shell not to look in
/usr for the national language support messages, and then re-run the shell.

# LANG=""; exec ksh   # (or sh, bsh, etc.) 

You can also switch to csh -- though csh has many faults, using
IBM's national language support is not one of them.

You should now be able to unmount /usr.
-- 
Ed Ravin            | I'm sorry, sir, but POSTAL REGULATIONS don't allow
cmcl2!panix!eravin  | PLASTIC tape over PAPER tape and NYLON cord on an
philabs!trintex!elr | 86 inch girth to LITHUANIA...
+1 914 993 4737     |