Comment # 3 on bug 926331 from Thomas Blume

(In reply to Oliver Neukum from comment #0)
> If an error on the root file system causes the fs to be mountable only ro,
> systemd will refuse to boot the system. Thus fixing the problem requires a
> rescue disk.

Are you getting an emergency shell when the problem happens?
If so, please boot with the boot parameters:

debug rd.debug

and attach /run/initramfs/rdsosreport.txt when the boot stops.

Is is possible that the behaviour is a side effect of bug 912734.
You can try installing the dracut update from:

http://download.opensuse.org/repositories/home:/tsaupe:/branches:/openSUSE:/13.2:/Update:/bsc912734/standard/x86_64/

and checking wheter the behaviour changes after updating the initrd.