Duh. Maybe I should read more thoroughly.

If your machine runs under VM, runlevel 1 will work if you
can get LOGON BY authority.

If you're LPAR'd and you're tcp wrappered, all you should need
to do is set hosts.allow & hosts.deny properly to only allow
YOUR client in (most PAMs won't permit telnet as root, but
nothing's stopping you from su'ing to root after you've telnet'd
in), effectively making you single-user. You're going to need
to manually (or by runlevel script) shut down all the possible
fs users: sshd, httpd, etc until your backups are done. Then
just do the inverse when you're done: unset hosts.* and bring
all the services back up.

Either this or train your operators to do it in runlevel 1. At
my site, the operators don't wanna know. Of course, I have
VM, so grabbing the console is no big deal; and nobody tells
me whether any backup method is appropriate or not. All I
have to do is come up with one that works (done).

--Jim--
James S. Tison
Senior Software Engineer
TPF Laboratory / Architecture
IBM Corporation
"If I wanna hear the pitter-patter of little feet, I'll put shoes on my
dog."

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