After upgrading to 3.18 I found that my rsync backup to a CIFS filesystem was failing on filenames that contained reserved characters in the set :<>|*?\ According to [1] the default strategy for handling these characters changed in 3.18, but in my experience (and according to [2]) it didn't work very well. A patch [3] addressing these problems seems to work for me. Carl [1] https://wiki.samba.org/index.php/SMB3-Linux [2] https://bugzilla.kernel.org/show_bug.cgi?id=92401 [3] http://article.gmane.org/gmane.linux.kernel.cifs/10512/