Except that he is 100% incorrect. One of my client sites is currently running z/OS 1.8 (which is certainly older than 1.10) on a bc12 (2828-H13). It (z/OS 1.8) has the toleration package so that we could run it on the z/114 that they purchased back in 2012, which was since upgraded to a bc12 2 years ago with no changes to the 1.8 LPAR. The client wanted to still run the old z/OS 1.8 in one of the LPARs due to some software requirements even though the other LPARs are now all z/OS 2.2 and higher.
CPC Node 002828.H13.IBM CPU Model 2828 Physical CPUs 4 Total MIPS 1563.49 MIPS/CPU 390.87 MSU 273 There is only one feature which doesn't work, and that is that the 1.8 system cannot update the IODF via HCD, but it's updated from the up to date LPAR and then used by the 1.8 system. That's a very slight issue, and certainly not a show stopper for anyone. If there were a DAT problem I am pretty sure we would know it by now. :) Brian On Sat, 1 Aug 2020 07:40:51 -0500, Joe Monk <joemon...@gmail.com> wrote: >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 >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN >> > >---------------------------------------------------------------------- >For IBM-MAIN subscribe / signoff / archive access instructions, >send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
