When you perform a "mirror" copy (using the /MIR switch) on external drives that contain data that originates on two or move Vista computers you need to open a Command Prompt window as an Administrator.
If you don't, you will get access denied error messages - changing attributes of directories etc.
Update for Windows 7
ReplyDeleteWhat I said before doesn't seem to be strictly true. However, I seem to be able to run Robocopy without admin rights on Windows 7 (I haven't re-checked on Vista as I no longer use it)