Generally, the rule is the following:
You z/VM cannot help you for running old NON-WORKING OSes on given
machine. Note, this is not about what is supported, but what is feasible
to run on bare metal (LPAR).
So, in this case z/OS 1.10 can run on EC12, but not on z14. Use of z/VM
doesn't change it.
Notes:
1. This is my understanding. I may be wrong, and I will be pleased to
get explanations.
2. I don't consider service like PTFs or FMIDs. Just assume you have
correct service to the OS. Note: in the past OS/390 2.10 was able to run
on z/990, but definitely only if some FMID was installed. And the trick
was crypto - that required separate service.
3. I don't consider any tricks like given component "stolen"/"borrowed"
from higher level system.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 01.08.2020 o 14:40, Joe Monk pisze:
Brian,
You said:
"> I don't know about z/VM 5.3, but running z/OS 1.10 under z/VM on a
z13 and z14 works (and probably also on a z15), so it's likely that
it will work on a z12."
Jim said:
"Prior to z/OS 1.12, z/OS IPL uses Dynamic Address Translation while
still in ESA/390 mode. z14 and later machines do not do ESA/390 DAT. So
the
oldest z/OS that could possibly IPL on a z14 or later machine would be z/OS
1.12.
Running under z/VM would make no difference in this regard."
There's nothing to differ about Brian. You said that running z/OS 1.10
under z/VM on z13 and z14 works, and Jim said thats physically impossible
because the hardware doesnt support it, since it doesnt do ESA/390 DAT.
Joe
On Fri, Jul 31, 2020 at 11:24 PM Brian Westerman <
brian_wester...@syzygyinc.com> wrote:
Jim,
I beg to differ, he wants to run things on the z12 (I assume either an
ec12 or bc12). z/OS lifecycle extensions for 1.10 on the z12 (which was
offered at the z12 announcement and updated several times afterwards)
certainly isn't going to alter the z12 hardware in any way, and I doubt
that the ptfs installed to 1.10 for lifecycle are going to change DAT in
any significant way, but maybe they do. In any case, they were (and still
are I think) available, if you can do it with the extensions then you can
do it with z/VM as well.
(this is from the 2013 IBM presentation slide #6)
• zEC12 and zBC12 capabilities differ depending on z/OS release
– Toleration support provided on z/OS V1.10 and z/OS V1.11
• The Lifecycle Extension for z/OS V1.10 or z/OS V1.11 is required to
acquire toleration PTFs and for support
– Exploitation support provided on z/OS V1.12 and higher
• z/OS V1.12
– Exploitation of selected functions
• z/OS V1.13
– Exploitation of most functions
• z/OS V2.1
– Full exploitation in base
also (from the technical introduction)
Operating systems Use of some features might require the latest releases.
The following operating systems are supported by the zEC12 and zBC12:
z/OS Version 2 Release 1
z/OS Version 1 Release 13 with PTFs
z/OS Version 1 Release 12 with PTFs
z/OS Version 1 Release 11 with the IBM Lifecycle Extension with PTFs
z/OS Version 1 Release 10 with the IBM Lifecycle Extension with PTFs
z/VM Version 6 Release 3 with PTFs
z/VM Version 6 Release 2 with PTFs
z/VM Version 5 Release 4 with PTFs
z/VSE Version 4 Release 3 or later, with PTFs
Brian
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