NetAppPHBG -
Do you have a Snapshot from before the robocopy job ?
SnapRestore the volume to that snapshot.
See the man page for the 'snap list' and 'snap restore' commands (for 7-Mode)...
I hope this response has been helpful to you.
At your service,
Eugene E. Kashpureff, Sr.
Independent NetApp Consultant, K&H Research http://www.linkedin.com/in/eugenekashpureff
Senior NetApp Instructor, IT Learning Solutions http://sg.itls.asia/netapp
(P.S. I appreciate points for helpful or correct answers.)