On Thursday, 11/10/2005 at 06:57 CST, Berry van Sleeuwen 
<[EMAIL PROTECTED]> wrote:
> Let me see if I understand correctly, CP would check the config at IPL?

Yes.

> What does CP check in this case? The hardware type (3390-3), the
> machinetype at the remote end (either HDS or EMC dasd), the ESCON 
director?
> I guess if CP would see the make of the remote hardware we would get an
> error but if it just senses a 3390 or an ESCON director it would see the
> same hardware. Even when it is in fact a different device. True? Or does 
CP
> check more parameters, such as a hardware serial number?

The device serial number is part of the data that's checked.

> The connection was made to a 3390-3 in both cases, three channels to 
EMC-
> dasd and 1 channel to HDS-dasd, both connected through an ESCON 
director.
> We had to activate a new IOCDS using a POR so VM has been IPLled afer 
the
> change. What would CP see in that case? We haven't got any messages at 
IPL
> that would point to an error.

Hence the need to talk to the Support Center.  (The only way CP should 
bring the "wrong" volume online is if all the paths to the "right" volume 
were offline when CP was IPLed.)

Alan Altmark
z/VM Development
IBM Endicott

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