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
http://lists.ceph.com/pipermail/ceph-users-ceph.com/2017-October/021560.html
<http://lists.ceph.com/pipermail/ceph-users-ceph.com/2017-October/021560.html>
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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