Users using the initrd tool dracut instead of Debian official tools
will not be able to mount, because sysinit/rootfs...fsck.service fails.
My observation:
Since systemd-220 all of files /lib/systemd/system/dracut....service
are wiped out, despite I have done a re-install of dracut.
There is no Debian bug about the issue. Obviously nobody uses dracut
I did begin using dracut since I switched to systemd before Debian officially did.
Thought a good idea. But I am not hit as much as I can use my self compiled kernels
which are not in need of any initrd: "make localyesconfig" did that trick.