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LPARs are a hardware thing - the change took place with the i5s - 520, 550, 575, 590 - and now 515 and 525. They all start with LPAR 1 - the old LPAR 0 (primary partition) is effectively handled (my way of thinking may be a bit flawed, but it's good enough for the casual observer) by the HMC - service processor.

Rob says all 5xx's can be LPAR'd - but he is far from the 530s et al - heh - and probably no one has one of those 10-year older machines.

The InfoCenter stuff is focused on other than i5 machines - that information is in the Hardware InfoCenter, not the software one that is the link that was offered.

So a 170 will always have a partition 0 - part of why the newer OS won't work that far back, prolly.

HTH
Vern

-------------- Original message ----------------------
From: James Lampert <jamesl@xxxxxxxxxxxxxxxxx>
Tom Liotta wrote:

You might want to look deeper. I've been away from that specific
element for a while and never was that deeply into it; but, IIRC,
the default base LPAR changed from 0 to 1 somewhere around V5R3,
possibly with systems new with V5R4?

But what happens if, say, a 170 (not LPARed, probably not even capable
of it), which reports its LPAR as 00, gets updated to V5R4? Is it still
00, or does it automagically start reporting its LPAR as 01?


--
James H. H. Lampert
Touchtone Corporation

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