Comment 8 for bug 1320402

I deviced a workaround for this by mounting and unmounting my raid separately. The key is that I don't need it during boot, nor start any daemons that keep files open on it.

First, I added the "noauto" option to all the mounts on the raid in /etc/fstab.

Then I added an upstart script as below. Note that the raid device and the mount points are hardcoded, so anyone using this needs to adapt them. It also doesn't hook into plymouth (aka bootsplash) like the normal mountall stuff does, so there aren't any nice messages and prompts if the mounts fail.

/etc/init/local-mountraid.conf:

description "Mount the imsm raid separately to work around LP #1320402"

start on filesystem
stop on runlevel [!23]
task

post-start script
    mdadm --assemble /dev/md/vol0 || :
    mount /more
    mount /d
end script

post-stop script
    umount /d
    umount /more
    mdadm --stop /dev/md/vol0
end script