Steven,
You can, you need to apply some toleration maintainence. You can IPL and
activate from a V5 iodf, but you can't use HCD to update it.
From the z/OS 1.7 Migration guide GA22-7499-08
Other system (coexistence or fallback) requirements:
To read from, IPL with, and dynamically activate an IODF at the V5
level, the PTFs for coexistence APARs OA07875 and OA08197 are required
on back-level systems. If you attempt to IPL with a V5 IODF from a
back-level z/OS system that does not have the PTF for APAR OA08197
installed, a wait state occurs. The coexistence PTF for APAR OA07875
allows you to view and dynamically activate the V5 IODF, but does not
allow you to update the V5 IODF from back-level systems. Once the IODF
has been upgraded to V5, the z/OS V1R7 HCD libraries must be used to
process updates to it. (A STEPLIB or JOBLIB from a back-level system to
the z/OS V1R7 HCD libraries, or to a copy of the libraries, is acceptable.)
Note: APAR OA07875 is available for z/OS V1R4 systems that have the z/OS
V1R4 z990 Compatibility Support feature installed (that is, HCD FMID
HCS7708). z/OS V1R4 HCD without the z990 Compatibility Support feature
(that is, HCD FMID HCS6091) does not have an applicable coexistence PTF.
(Tip: HCD FMID HCS7708 shows up as “z/OS V1.4 HCD” on its primary panel
and is described as “z/OS V1.4 HCD” in the documentation. HCD FMID
HCS6091 shows
Roy
Steven Conway wrote:
I don't believe you can use a V5 IODF (created on the z/OS 1.7 system) on
a z/OS 1.4 system.
Perhaps one if the hardware gurus on the list can help out with a
reference?
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