z/OS 3.1 ESP is supported under 7.2 and 7.3 z/VM according to IBM doc. In a test, I checked z/OS 3.1 under z/VM 7.1 and immediately got a PSW Wait state 006 related to a hardware issue. Considering z/VM handles I/O it's possible it's not compatible. So I'm not sure z/OS 3.1 is supported under z/OS 7.1 as I hoped. Sometimes IBM as many vendors do will, say a product only works under-supported releases, but that doesn't always mean it won't work.
Original Message:
Sent: 9/18/2023 9:49:00 AM
From: Marna Walle
Subject: RE: z/OS 3.1 ESP under z/VM 7.1
Hello,
I'm only replying in a general way, as I have no experience in trying to run the new z/OS 3.1 under an unsupported z/VM. And I haven't looked up which z/VM levels have which machine facilities. (We don't test unsupported combinations in Development.) If you wanted to see what machine facilities the z/OS release level needs, you can find that in the z/OS Planning for Installation book. The z/OS 3.1 Planning for Installation is found here: https://www.ibm.com/docs/en/SSLTBW_2.5.0/pdf/e0zb100_v3r1.pdf
In the book, Table 7 contains the "Minimum server levels and machine facilities that are required for z/OS". You can see for z/OS 3.1, we require:
- z/VM 7.2,
- z14 or z14s
- All previously required machine facilities, plus the
following extensions (by STFLE bit):
Bit
Machine Facility
54
The entropy-encoding-compression facility.
58
The miscellaneous instruction extension 2 facility.
130
The instruction execution protection facility.
134
The vector binary-coded-decimal facility.
135
The vector enhancements facility 1
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Marna Walle
z/OS Installation and Upgrade
IBM Poughkeepsie
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Original Message:
Sent: Fri September 15, 2023 12:37 AM
From: Samuel Cohen
Subject: z/OS 3.1 ESP under z/VM 7.1
If you have a license for z/VM V7 and are paying Service and Support (S&S), you can get z/VM V7.2 or 7.3 at no additional charge. You can do an "upgrade" installation to the newer level rather than install z/VM anew, which entails moving all your customizations to the new version. That being said, unless there is a feature provided in a later z/VM release that is needed by z/OS 3.1 running as a guest, z/OS 3.1 is likely to work under z/VM 7.1.
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Sam Cohen
Levi, Ray & Shoup, Inc.
Original Message:
Sent: Thu September 14, 2023 06:58 AM
From: Edwin Jean-Paul Vening
Subject: z/OS 3.1 ESP under z/VM 7.1
I would develop NG Cryptography on that, If I only had a sponsor :-)
Edwin (chargen)
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Original Message:
Sent: 9/13/2023 10:41:00 AM
From: Arthur Zeigler
Subject: z/OS 3.1 ESP under z/VM 7.1
Was just curious if anyone had tried z/OS 3.1 ESP under z/VM 7.1? I know z/VM 7.1 is no longer supported and IBM doesn't recommend using unsupported systems. Was just curious in case we needed to use a 7.1 z/VM system for a temporary purpose. Thank you in advance.
, but was just curious in case we needed to use a z/VM 7.1 system. Thanks for any feedback.
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Arthur Zeigler
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