Has anyone experimented with OPTION CONCEAL for z/Linux guests to
prevent them from going into CP Read?
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On: Mon, Apr 14, 2008 at 09:40:57AM -0400,Stracka, James (GTI) Wrote:
} Has anyone experimented with OPTION CONCEAL for z/Linux guests to
} prevent them from going into CP Read?
Whats the matter with SET RUN ON?
--
Rich Greenberg N Ft Myers, FL, USA richgr atsign panix.com + 1 239 543 1353
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: OPTION CONCEAL and z/Linux Guests
On: Mon, Apr 14, 2008 at 09:40:57AM -0400,Stracka, James (GTI) Wrote:
} Has anyone experimented with OPTION CONCEAL for z/Linux guests to }
prevent them from going into CP Read?
Whats the matter with SET RUN ON?
--
Rich
On Mon, Apr 14, 2008 at 4:44 PM, Stracka, James (GTI)
[EMAIL PROTECTED] wrote:
I wondered who would be the first to ask that. I does not prevent one
from going into CP READ. OPTION CONCEAL does add more protection.
And I thought the thread about the top-10 questions to ask... had
been
I wondered who would be the first to ask that. I does not prevent one
from going into CP READ. OPTION CONCEAL does add more protection.
OTOH, do you REALLY want a Linux virtual machine to reIPL if you somehow
manage to generate a CP READ? Seems to be going direct to the nuclear
option
Not really. We had a user logon to a z/Linux guest and hit PA1
instead of PA2 and left it sit there too long. I wanted to prevent
hitting PA1 putting it into CP READ. OPTION CONCEAL might be a too
powerful hammer.
Sounds like it. OPTION CONCEAL was really designed for CMS machines that
14, 2008 12:17 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: OPTION CONCEAL and z/Linux Guests
Remap the user's keyboard so that there is no PA1.
Regards,
Richard Schuh
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What happens if you simply DETACH the VM console? Hard to hit PA1 in
that case. OK, maybe a bit extreme, but it would stop the problem.
Trying that on my test system caused Linux to panic -- having
/dev/console go away is not a friendly act. Probably not desirable.
OpenSolaris tolerated it
Operating System
[mailto:[EMAIL PROTECTED] On Behalf Of David Boyes
Sent: Monday, April 14, 2008 10:54 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: OPTION CONCEAL and z/Linux Guests
I wondered who would be the first to ask that. I does not
prevent one
from going into CP READ
OPTION CONCEAL does *not* cause any CP READ to result in an IPL. It
will disable PA1, and, when there is a disabled wait, a reIPL.
Disabling PA1 can be done with CP TERM BRKKEY NONE too
2008/4/14, David Boyes [EMAIL PROTECTED]:
I wondered who would be the first to ask that. I does not prevent
Great answer! Thank you Kris.
-Original Message-
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Kris Buelens
Sent: Monday, April 14, 2008 12:57 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: OPTION CONCEAL and z/Linux Guests
OPTION CONCEAL does *not* cause any
I had an IBM manager who used to say If you can't change the user,
change the user. She was the one who laid me off :-)
Jim
David Boyes wrote:
Correcting the problem between the terminal and the chair is probably
cheaper... and much more entertaining for the system staff...8-)
--
On Monday, 04/14/2008 at 01:01 EDT, Kris Buelens [EMAIL PROTECTED]
wrote:
OPTION CONCEAL does *not* cause any CP READ to result in an IPL. It
will disable PA1, and, when there is a disabled wait, a reIPL.
Disabling PA1 can be done with CP TERM BRKKEY NONE too
CP TERM MORE 0 0
CP TERM
If you do not want it to begin, enter a SYSTEM RESET command. :-)
Regards,
Richard Schuh
Now I press PA1 and... HEY! STOP THAT! I don't WANT to
BEGIN! STOP IT, I say!
Alan Altmark
z/VM Development
IBM Endicott
@LISTSERV.UARK.EDU
Subject: Re: OPTION CONCEAL and z/Linux Guests
I had an IBM manager who used to say If you can't change the user,
change the user. She was the one who laid me off :-)
Jim
David Boyes wrote:
Correcting the problem between the terminal and the chair
You can lead a user to a terminal but you cannot make them think.
-Original Message-
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Schuh, Richard
Sent: Monday, April 14, 2008 2:11 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: OPTION CONCEAL and z/Linux Guests
On Monday, 04/14/2008 at 02:11 EDT, RPN01 [EMAIL PROTECTED] wrote:
We attach and detach the guest consoles all the time with no adverse
results, as long as set run on is in effect. Actually, we log in and
disconnect; I'm not sure how or why you would detach the console, as
it
might be needed
On: Mon, Apr 14, 2008 at 12:04:33PM -0400,Stracka, James (GTI) Wrote:
} Not really. We had a user logon to a z/Linux guest and hit PA1
} instead of PA2 and left it sit there too long. I wanted to prevent
} hitting PA1 putting it into CP READ. OPTION CONCEAL might be a too
} powerful hammer.
On: Mon, Apr 14, 2008 at 12:13:15PM -0400,David Boyes Wrote:
} Not really. We had a user logon to a z/Linux guest and hit PA1
} instead of PA2 and left it sit there too long. I wanted to prevent
} hitting PA1 putting it into CP READ. OPTION CONCEAL might be a too
} powerful hammer.
}
}
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