Changing or upgrading your processor configuration

When you need to change a support level of your processor or upgrade your processor to a new type, consider doing this in a working copy of the active production IODF, created by initiating the very first change in the production IODF.

Changes to a processor configuration in HCD requires a special information table, known as a Processor Information Table (PIT). It contains a set of constants that describe each particular processor type and helps HCD to validate a processor definition. A PIT for a new processor type or for an additional support level of the existing processor type is provided by IBM® in a corresponding PTF or in the base of z/OS® when a new processor type or a new support level for the existing processor type is made available for installation.

HCD reads all available PITs when you start an HCD dialog; you can choose Option 7. Query the supported hardware and installed UIMs and then select 1. List supported processors to display all processor types, supported in this particular dialog. Additional information on the processors may be displayed by horizontal scrolling; you can find an identification of a hardware support level in additional columns. If a line is preceded by a '#' sign, it is the indication that this line and the previous line belong together, because the information of a horizontally scrolled screen does not fit in one line. See Appendix F. Machine limits and rules in the z Systems IOCP User's Guide to help you to understand what is delivered by a PIT to HCD. When you need to change a processor support level or upgrade a processor, it is your responsibility to install maintenance that contains a corresponding PIT. If a PIT for a processor type is not installed, an attempt to enter a type-model for a new processor is diagnosed by message CBDA100I:

CBDA100I Unknown processor type-model proc_type/model specified

There is a distinction between changing a support level of an existing processor and upgrading an existing processor to a new type.