Listing 2: Defrg.bat 

@Echo Off 
' BEGIN CALLOUT A
Set logfile=f:\defrag.log
' END CALLOUT A
Echo Started %date%,%time% >>%logfile% 
Echo ----------------------------------- >>%logfile% 
Echo Defragmenting C: drive >>%logfile% 
Echo. >>%logfile% 
defrag.exe c: -f >>%logfile% 
Echo ----------------------------------- >>%logfile% 
Echo Defragmenting E: drive >>%logfile% 
Echo. >>%logfile% 
defrag.exe e: -f >>%logfile% 
Echo ----------------------------------- >>%logfile% 
Echo Defragmenting F: drive >>%logfile% 
Echo. >>%logfile% 
defrag.exe f: -f >>%logfile% 
Echo ----------------------------------- >>%logfile% 
Echo Finished %date%,%time% >>%logfile% 
Echo ----------------------------------- >>%logfile%