[HPADM] file systems mounted in single user mode

From: COUPRIE Kees (Kees.COUPRIE@swift.com)
Date: Mon Aug 30 2004 - 05:29:37 EDT

Lords of the ping!

I stumbled across a weird problem. On several systems we had to extend
/var, and I created change requests to do so.

In the instructions I had the operators reboot the system in single user
mode (not just init s, but shutdown the system and boot it using ISL and
then do hpux -is).

Now the weird thing is that on some systems this worked perfectly, but
on some other systems, when the operator tried to do the extendfs (after
lvextend), the system refused to do this because /var was mounted. In
fact ALL file systems in /etc/fstab were mounted.

I have tried to figure out what exactly happened and for as far as I can
see (from rc.log and the audit files) the instructions were executed as
prescribed, but still all file systems were mounted.

I have been discussing this with my fellow sysadmins and we all agree
that this is theoretically impossible, but it happened anyway.

Any idea how these file systems could have been mounted when the system
was brought up in single user mode?

Rgrds,
Kees Couprie 

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