Over the years I've used SD! successfully a number of times to clone a TM drive when the drive ran out of room (or if I just wanted to use a newer drive). It's always been successful (AFAIK...)
I just ran across
this from Carbon Copy Cloner's Knowledge Base which says not to use CCC this way "because Time Machine backup folders contain Apple-proprietary filesystem devices" (whatever that means).
So, CCC doesn't support cloning TM drives. Does SD! still do so? (I couldn't find a forum post newer than 2015 that addressed this.)
Thanks!