On Thursday, 07/26/2018 at 01:45 GMT, "Feller, Paul" 
<paul.fel...@transamerica.com> wrote:

> <several dozen more I/O errors>

I'm thinking along the same lines as Mike. 

If this is a synchronous mirror, something seems wrong.  Is it really a 
synchronous mirror primary? It's sort of acting like an as-yet-unpopulated 
flashcopy target, which is inappropriate for a cloning operation (IMO).

There is no such thing as I/O errors ever being "ok" in any sense of the 
word during a copy operation.  "Detected capacity change"?   A capacity 
change event is driven by hardware and it's not something you expect to 
see during a copy.  (Assuming Linux isn't mis-reporting the event.)

Alan Altmark

Senior Managing z/VM and Linux Consultant
IBM Systems Lab Services
IBM Z Delivery Practice
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
alan_altm...@us.ibm.com
IBM Endicott


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