Roy Hewitt wrote:
I'm not sure I completely understand the question.
When you ask "Question: How system recognize relevant CPC definition?"
are you referring to the creation of the 1)IOCDS or 2)at IPL time? If
its 2, then CPC information is not used at IPL time. You dont need CPC
information in the IODF to IPL, You wont be able to do dymanic
activates[1], but it will still IPL. The IPL process only uses the OS
config definition in the IODF and this only contains the list of
devices, EDT, and NIPcons etc.
I'll try to rephrase my doubt again:
IODF constains definition fo three CPCs: CPC1 CPC2 and CPC3.
All three CPCs are same type (i.e. 2064-1C6), but each of them has
different I/O devices connected. To be more complex, Each CPC have
LPAR1, and LPAR2 defined. Note, the same names of LPARs.
During IPL IODF is read. Two things are important: OS config used (we
specify it in LOADxx), and proper LPAR name *on proper CPC*. MVS "knows"
what OS config to use, knows on what LPAR it runs but also has to
determine what CPC is used and read proper "section" of IODF.
IMHO it compares CPC name which is arbitrary assigned during HCD
creation. The name resides (to my belief) in HSA so MVS can learn the
name and make good choice when reading IODF.
It must be CPC name since the parameter is mandatory and unique.
It seems I answered to myself...
I 'm sorry for the confusion.
--
Radoslaw Skorupka
Lodz, Poland
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