On Tuesday, 03/01/2011 at 04:40 EST, "Perez, Steve S" 
<sspe...@corelogic.com> wrote:
> I issued a LINK RR against it and did a Q LINKS and it  shows no other 
link 
> access to that disk.  Would it be possible that when we  paused PPRC and 

> suspended Global Mirror on the z/OS LPAR (shared volumes  between all 
LPARS) 
> that it may have accessed the dasd the minidisk is on in  write mode and 
caused 
> the access mode on the z/VM LPAR to go into a  READ-MODE?   Is that 
probable?

If someone played with the PPRC definitions, they could have reversed the 
primary/secondary relationship, making your volumes the secondaries.  You 
can't write to a secondary.  But I would certainly have expected messages 
on the operator's console if that happened.

If this happened, then you break someone's fingers.  GDPS breaks and 
restores PPRC connections only in synchronization with various flavors of 
CP HYPERSWAP commands.  Humans or other solutions are expected to do the 
same.

Alan Altmark

z/VM and Linux on System z Consultant
IBM System Lab Services and Training 
ibm.com/systems/services/labservices 
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott

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