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Content [~] uname -apKU FreeBSD harbinger 13.0-CURRENT FreeBSD 13.0-CURRENT #5 r364030: Tue Aug 11 07:15:59 UTC 2020 root@harbinger:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG amd64 amd64 1300105 130 [~] [~] pkg query '%o %v %R' openzfs openzfs-kmod sysutils/openzfs 2020080800 FreeBSD sysutils/openzfs-kmod 2020080800 FreeBSD [~] bectl list -aDs BE/Dataset/Snapshot Active Mountpoint Space Created r364030 zroot/ROOT/r364030 NR / 15.1G 2020-08-11 08:25 r364030@2020-08-15-20:40:36-0 - - 688K 2020-08-15 20:40 r364030-OpenZFS zroot/ROOT/r364030-OpenZFS - - 284K 2020-08-15 20:40 zroot/ROOT/r364030@2020-08-15-20:40:36-0 - - 688K 2020-08-15 20:40 After activating r364030-OpenZFS BE and mounting on /mnt, I edit: - /mnt/boot/loader.conf to load openzfs_load="YES" and comment out zfs_load="YES" A reboot fails during the boot process dropping the system at the mountroot> prompt On screen I see: Loader variables: vfs.root.mountfrom=zfs:zroot/ROOT/r364030-OpenZFS Some options are displayed for possible valid disk boot devices which I can't get to work Then I just enter on an empty line which drops me into KDB mountroot> panic: mountroot: unable to (re-)mount root.