Default retry count is 1 million and default wait is 30 seconds. I recommend reducing that to a realistic level (i.e. 2 retries and 5 or 10 seconds for the wait). If you're trying to mirror drives, this might be simpler than excluding files and directories.

Copy the data over.<br /> robocopy <source> <target> /MIR /R:2 /W:3

Refresh file security for all files, without copying any file data.<br /> robocopy <source> <target> /E /COPY:S /IS /IT /R:2 /W:3

Replicate data (/MIR) and security (/SEC) for changed files, and update just the security (/SECFIX) for unchanged files.<br /> robocopy <source> <target> /MIR /SEC /SECFIX /R:2 /W:3

If these are file shares you are migrating to a new drive, follow these additional steps.

1. . Runregedit
2. . Browse to the following key:<br /> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LanmanServer\Shares
3. . Edit thePath for each of the moved shares to the new location
4. . Restart theServer service

• http://blogs.technet.com/b/filecab/archive/2008/07/31/robocopy-mir-switch-mirroring-file-permissions.aspx
• http://support.microsoft.com/kb/125996

– Main.FredPettis - 2012-06-20