ZoL bug has also been opened for this with more information: https://github.com/zfsonlinux/zfs/issues/7910
** Bug watch added: Github Issue Tracker for ZFS #7910 https://github.com/zfsonlinux/zfs/issues/7910 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1788004 Title: File System inaccessible after 18.04 upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1788004/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs