We did it with Robocopy because our original repo was Windows 2012 w/ dedupe on. It kept corrupting profiles. We moved to a Windows 2012 R2 box with a Flash LUN w/o dedupe. Runs fine.
Here was our command:
robocopy "F:\Persona" "H:\Persona" /MIR /SEC /FFT /Z /R:1 /W:1 /LOG+:PersonaCopy.log /TEE