Example of a common robocopy command
robocopy.exe C:\Users\username\Documents G:\backup /e /r:0 /w:0 /v /TEE
/E : Copy Subfolders, including Empty Subfolders.
/R:n : Number of Retries on failed copies - default is 1 million.
/W:n : Wait time between retries - default is 30 seconds.
/V : Produce Verbose output log, showing skipped files.
/TEE: Splits the output to the screen and the log file
Robocopy is built into Win 7 & Vista but can be downloaded for XP: Windows Server 2003 Resource Kit Tools
Update: Adding /TEE will allow the log file to be created and produce the Verbose output. Without the /TEE, the log file be created but you will not see the Verbose output in the black window.