Please also see https://github.com/zfsonlinux/zfs/issues/9801 - it has a full set of technical details related to this topic.
** Bug watch added: Github Issue Tracker for ZFS #9801 https://github.com/zfsonlinux/zfs/issues/9801 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1848496 Title: [zfs-root] device-mapper: reload ioctl on osprober-linux-sda5 failed: Device or resource busy To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1848496/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs