FWIW, live guest relocation is not supported for the case of z/OS running under/on z/VM.
<snip> What happens on an older model where a field is "reserved, must be zero" if the programmer supplies a non-zero value which would be valid on a newer model? </snip> Perhaps, architecturally, the answer is: the behavior is undefined or machine-dependent. I would guess that in most cases the actual behavior is that there is no enforcement so that the non-zero value would simply be ignored. Peter Relson z/OS Core Technology Design
