Lets forget about Yosemite. I don’t need it anymore because my Firmtek eSATA card works fine on High Sierra as does 1.81. Now if you could just improve the performance.
BTW, Bombich made a modified version of CCC to address the issue I mentioned. We’ll see if it works; if not at least I can create a folder in the ZFS pool and CCC will back up to it just not the root.