HI,
there is a way to do smtape to a filepath in Ontap 8.3.x
*> system smtape backup -volume test -backup-snapshot test -file-path /<vserver>/<volume>/<filename>
*> version
NetApp Release 8.3.1: Mon Aug 31 12:42:08 UTC 2015
Remember: its in diagnositc mode, so maybe not officially supported now.
BR,
Klaus