🚀 go-pugleaf

We have found that upgrading from AIX 2.1.2 to 2.2.1 is quite a task. We were
finally getting someplace when the following happened:

	While my collegue was using the 'devices' command to change a parameter
	for lp0, I executed 'penable tty4' so that I could test a terminal.  
	This turns out to be a NO-NO!  It not only crashed the system, but 
	reboot to multi-user is now inoperative.  It appears to go through all 
	stages successively but will not complete the boot at the final stage.
	We looked at the /etc/system file under the installation & maintenance 
	standalone shell and it looks o.k.  We seem to be stuck!

I would appreciate any insights as to what we might have screwed up when we
caused the crash and how we might regain the ability to reboot, short of
starting from scratch.  Is there a particular file which might be brain-damaged?

The practical moral is *don't attempt to execute penable while the devices
command is open*. However, it seems that if there were an intrinsic problem
with this, AIX should at least protect against a fatal crash. I hear that 2.2.1
is the last IBM AIX upgrade, so we will have to live with this and any other
AIX limitations.

Jim Beauchamp   j-beauchamp@uiuc.edu