Your network contains a Distributed File System (DFS) target folder named Folder1 that contains 100
GB of data. You plan to create a new DFS replica of Folder1 on a server named Server2. You need to
prestage the data in Folder1 on Server2. The solution must ensure that the amount of initial DFS
replication traffic is minimized. Which tool should you use to prestage the Folder1 data?

A.
Dfscmd

B.
Dfsrmig

C.
Dfsutil

D.
Wbadmin

Explanation:

Distributed File System (DFS) replication is a new technology that has been included in Microsoft
Windows Server starting in Microsoft Windows Server 2003 R2. Some Microsoft TechNet articles
discuss the concept of prestaging to reduce network traffic during the initial synchronization of DFS
data. Whether data that is located on each replication partner is considered the same depends on
the hashing algorithm that is applied to the file, to the file permissions (discretionary access control
lists), and to the file audit properties (system access control lists).
The hashes of prestaged data are affected by the following:
Permissions
Audit properties
Inheritance
The copy tool, such as Robocopy.exe or Xcopy.exe, that is used
Because the possible combinations of these factors are so wide and varied, predicting the success of
prestaging operations is very difficult. However, the Backup program in Windows Server is a reliable
mechanism to prestage data.
How to use the Backup program to prestage DFSR data
Back up the data by using the Backup program. You can back up to tape or to a file.
Transfer the backup to the destination server.
Restore the backup to the destination server. The hashes that are computed by DFSR for each server
should be identical for files that have not changed.
http://support.microsoft.com/kb/947726