Hello,

We recently started having a chpid start throwing interface control checks.  
The z/OS guy made the chpid unavailable to zOS and told us to vary off the 
chpid to z/VM.  This happened a few months ago.  Since then z/VM was IPL'ed.  
And the chpid started throwing Interface Control checks.  It took a while (a 
few days) to think about looking for an interface control check, but one of the 
LPAR Linux systems (an NFS Server)  had them in the log.

My question is what about the Linux guests under z/VM.  We are using set MIH 
off.  Is that appropriate?  The virtual machine operations book says the CP 
sends you a message if it detects an interface control check.  Does this 
message show up in /var/log messages?

We do not have a z/VM console log manager.  We have something that a person 
here put together with PROP. (and sometimes it is not running).  So we may or 
may not have had interface control checks reflected to the operator console.

Any ideas, should we run set MIH on(at least until the hardware gets fixed.)

Ron

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