To quote the WSC Flash,

"Required Software
"The z990 and z890 servers require specific levels of the z/OS and OS/390
(OS/390 no longer supported) operating system to provide compatibility and
exploitation support. Compatibility or exploitation support software must
be installed on all z990 and z890 images for the supported operating system
levels. PTF service alone does not provide compatibility or exploitation
support. The software release will determine how to obtain the required
software. The z990 in the z/OS environments is supported by the following:
  z/OS 1.6 and higher
  z/OS 1.4 with z/OS 1.4 z990 Exploitation Support feature (orderable
feature)
  OS/390 2.10, z/OS 1.2 , z/OS 1.3 with z990/z890 Compatibility for Selected
Releases (Web deliverable)
"Note: Service support is officially withdrawn for OS/390 2.10 and z/OS
1.2. Service support for z/OS 1.3 is officially withdrawn March 30, 2005."

I'm quoting this because it says that you must have either
the "compatibility" or the "exploitation" FMIDs installed on your operating
system to IPL on a z990 machine.

If your z/OS 1.2 operating system has the "compatibility" FMIDs already
installed (and which are apparently no longer available from IBM), as well
as the other fixes listed in the 2084DEVICE PSP bucket, then it should
certainly work on a z990.

At my company, DR test time is pretty expensive.  My advice here is worth
approximately what you paid for it. <g>

Brian

On Tue, 12 Jul 2005 12:26:57 -0400, Mark Jacobs <[EMAIL PROTECTED]>
wrote:

>On Tuesday 12 July 2005 12:03 pm, Brian Peterson wrote:
>> Check out the following IBM WSC Flash:
>>
>> http://www-03.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/FLASH10236
>>
>> The document mentions that z/OS 1.2 is no longer supported, and the
>> required FMIDs which you must have in order to IPL were removed from
IBM's
>> Web Deliverable web site on December 31, 2004.
>>
>> You might be better off running your DR test using a supported z/OS
>> operating system upon which you have already installed the required
>> compatability / toleration / exploitation maintenance.
>>
>> Brian
>>
>We do have a supported operating system level with the required zos support
>applied. At our last test however we had CVAF abends while doing full
volume
>restores,
>
>I wanted to have our last known good single system sysres available in case
>the problem occured with our next test.
>
>Will the zos12 sysres even ipl without the compatibility service applied?
It
>is a very basic system. zos, JES2,vtam, tso.
>
>> On Tue, 12 Jul 2005 11:08:18 -0400, Mark Jacobs
<[EMAIL PROTECTED]>
>>
>> wrote:
>> >We have a zOS 1.4 level single system sysres that we use at DR to
perform
>>
>> the
>>
>> >majority of our restores. At our last test we had a software problem
with
>> >this level of the operating system which caused us problems. (PTF has
been
>> >applied)
>> >
>> >For our test later this month we are bringing a copy of our prior single
>> >system sysres at the zOS 1.2 level.
>> >
>> >This test is running on a z990 processor (first time). What "stuff" does
>>
>> this
>>
>> >zOS 1.2 sysres have to have to work on the z990.
>> >
>> >Thanks.
>> >--
>> >Mark Jacobs
>>

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