This very much looks like this ancient issue in RedHat: https://bugzilla.redhat.com/show_bug.cgi?id=752593
It got fixed at some point in 2012 … https://bugzilla.redhat.com/show_bug.cgi?id=785739 Is Ubuntu still running mdmon from inside the root fs and killing it before r/o remount? I am now pondering what to do with a set of file servers running 16.04 and root on an IMSM RAID. I got a number of systems with similar hardware running CentOS 7 just fine with no issue on reboot. I see elaborate handling of mdmon in systemd units on CentOS … including the --offroot command line parameter that I don't see documented anywhere. KillMode=none might also play a role in the mdmon@.service file. ** Bug watch added: Red Hat Bugzilla #752593 https://bugzilla.redhat.com/show_bug.cgi?id=752593 ** Bug watch added: Red Hat Bugzilla #785739 https://bugzilla.redhat.com/show_bug.cgi?id=785739 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1587142 Title: Shutdown hangs in md kworker after "Reached target Shutdown." To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1587142/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
