Thanks Marc and Burkhard. I think what I am learning is it’s best to copy 
between filesystems with cpio, if not impossible to do it any other way due to 
the “fs metadata in first pool” problem.

FWIW, the mimic docs still describe how to create a differently named cluster 
on the same hardware. But then I see 
saying that behavior is deprecated and problematic. 

A hard lesson, but no data was lost. I will set up two machines and a new 
cluster with the larger drives tomorrow.
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