Created attachment 249537 [details] C++ code exposing the problem I attached small program using devdctl to get GEOM event triggered by "geli attach" that shows there is no physical path associated with the event. As a consequence, I think zfsd doesn't do what it's supposed to do: https://github.com/freebsd/freebsd-src/blob/main/cddl/usr.sbin/zfsd/zfsd_event.cc#L143