Yes, that reference looks very close to what I want to do.   It has been 
drummed into me with the replies and documentation that a set of two parallel 
GM sessions from the same source volumes (H1) to two other sets of volumes (H2 
and H3) is just not supported.

I have developed a new Idea and I could use some feedback.   How does this 
sound?    
 1.  A Metro Mirror  within a single DS8k  Where set H1 clones to H2.
  2.  Establish a second Global Mirror from H2 to the new DS8900F - H3

This is close to the Metro/Global Mirror scenario in the documentation.  It 
just moves the H2 target from a 3rd DS8k into the H1 DS8k.

There are potential pitfalls that need more research
1.  Can H2 be Space Efficient volumes in a Internal Metro  Mirror or do they 
have to be fully configured for space?
2.  Can the H2 be both the target of a MM *and* the source of a GM relationship?
3.  Does this expose us to buying additional capacity licenses for the Copy 
Services license?

Fancy technology breeds fancy problems.

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