I ran Robocopy to migrate data from a Drobo NAS device to a Dell Server running Windows Server 2012 R2. The Server has Direct Attached Storage and a large volume created to share the files.
I used the following command:
robocopy "T:\" "X:\Media" /E /ZB /R:5 /COPY:DAT /PURGE /X /TEE /LOG:"C:\RobocopyLog.txt"
The destination files all show the file size under size (i.e. 27.9 MB) but under Size on disk they say 0 bytes. Server 2012 shows very little data on the volume (110mb).
Remote access of the files on the destination server result in error messages about corrupt files.
I don't understand showing size accurately, but size on disk showing 0 bytes. Also, it's taking days to copy the data, so it's not like it's quickly copying 0 bytes.
For whatever it's worth I have dedup set up on the destination Volume.