OS/390 2.10 is known to run reasonably well as a guest of a current zVM
with no special actions required.
OS/390 2.9 (and earlier) has a problem. I don't remember exactly what
wait-state it loaded during the IPL, but using normal procedures 2.9 would
not IPL as a guest of zVM 5.3 on a z9.. I did get a "magic command" from
an IBM friend (who shall remain nameless unless he speaks up) that allowed
the OS/390 2.9 system to IPL and run. We did isolate the OS/390 as much as
possible (full-pack minidisks instead of dedicated, etc.) Obviously this
is very far from 'supported' in any sense of the word, but we do have a one
customer running 2.9 and several customers running 2.10 on a z9 under zVM
5.3. I would not want to hazard a guess as to whether 2.8 would be
possible... It may also make a difference what type of hardware you are
running this on... The above experience is on z9s. It is possible that it
would not work on a z10.
Mike
C. M. (Mike) Hammock
Sr. Technical Support
zFrame & IBM zSeries Solutions
(404) 643-3258
[EMAIL PROTECTED]
"Mike Spaniol"
<[EMAIL PROTECTED]
ckwell.com> To
Sent by: The IBM "IBMVM@LISTSERV.UARK.EDU"
z/VM Operating <IBMVM@LISTSERV.UARK.EDU>
System cc
<[EMAIL PROTECTED]
ARK.EDU> Subject
Running os/390 as a guest
09/24/2008 01:53
PM
Please respond to
The IBM z/VM
Operating System
<[EMAIL PROTECTED]
ARK.EDU>
Hello,
May I run OS/390 V2R8 as a guest under any of the supported releases of
z/VM? I believe it is unsupported by IBM, but, does it work? OS/390 is
unsupported so I don't think I'm any worse off. I'm looking at bringing in
a smaller, newer, IBM mainframe and trying to save some money on my IBM
monthly license fees. But, I need to support an old guest running OS/390
V2R8. I can't afford to upgrade all the third party software that this
guest is using.
Mike Spaniol
Blackwell
Senior Systems Programmer
6024 Jean Road, Building G, Lake Oswego, OR 97035
Tel: +1 503-684-1140 X1397
Fax: +1 503-639-2481
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