NetApp to Unity migration issue

Hello all,

We are currently moving ~40TB of data from a NetApp array to a Unity 650F running 5.0.1 code. I have tried using Robocopy but on the sync portion of the process it is copying all the files again. I tried EMcopy64 (4.20) but it chokes on some long file names. Well on one small file system (~27GB) it could not access 546 files. Is there some switch on EMCopy that will allow a 360+ file name? I know the Unity can handle it because Robocopy copies the files there. Or is there a switch I am missing on Robocopy? 

Robocopy: 

robocopy $sour $dest /copy:datso /log:$log /mir /ns /nc /njh /nfl /ndl /np /w:1 /r:1 /mt:128 /s

EMCopy

emcopy64.exe $sour $dest *.* /s /de /o /r:1 /w:1 /c /th 128 /log:$log