Windows XP and Windows Server 2003 both include a new way to invoke the Windows Defragmentation tool via the command line. This is different from prior versions of Windows in which there was no such command line based way to invoke this tool. Here is an example of the usage of defrag.exe:
defrag.exe -v e: >c:\temp\logfile.txt
This command will begin the Defragmentation of the target machines E: drive. The –v switch enables verbose logging of which the location is specified at the end of the command.
The biggest advantage of this new functionality is the ability to schedule disk Defragmentation via the Windows Task Scheduler. By simply creating a batch file to invoke this command you can put an end to disk Defragmentation as a manual process