This appears to be an issue with mismatched user/kernel zfs components. After adding ppa:jonathonf/zfs (https://launchpad.net/~jonathonf/+archive/ubuntu/zfs) and updating the user components my `zfs promote` problem has been resolved.
# zfs version zfs-2.1.1-0york0~20.04 zfs-kmod-2.0.2-1ubuntu5.1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1947568 Title: cannot promote clone: "not a cloned filesystem" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1947568/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
