Best Way to Copy TeraBytes of Data

I have two Windows 2008 servers with terabytes of data on each.  I am trying to copy large amounts of data between servers (with robocopy) and the copy always fails for one reason or another.  

I can't seem to find the right robocopy switches to make the copy continue regardless of errors.

What would be the best way to copy the files - with robocopy or otherwise.

Note: I do not manage Active Directory and DFS is not an option
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Stelian StanIT Services ManagerCommented:
Another tool that MS released after robocopy is richcopy, This tool works basically the same as robocopy except it has some improvements such as multithreading the copies. When copying lots of files/folders this should let you finish the copy faster than robocopy.
with 2008 you can do multiple threads with robocopy please post the switches you are using.

Alternatively EMC offers a great tool for moving tons of data that has worked wonderfully fo me in the past EMCopy. I don't know if everyone has access to it but it was free for me. below is where to download it from the EMC site.

•      Home > Support > Product and Diagnostic Tools > Celerra Tools > Windows Migration Tools > EMCOPY
Is the data you are trying to copy live data?

Robocopy is fine for this, as you just run the same thing 3 or 4 times to catch any altered files

robocopy \\source \\destination /E /COPY:DATSOU /R:2 /W:15

Open in new window

/E = Everything (Folders, SubFolder, Files)
/COPY:DATSOU = Copy all file attributes
/R:2 = Retry twice on failed files (default is 1 million retries!)
/W:15 = Wait time in seconds between retries

However, if it is live data, you would be better off for this size of data using the Volume Shadow Service
hobocopy is a cmd line tool just like robocopy (it was actually inspired by robocopy), but it takes a VSS copy - so even locked files will copy successfully

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