text: Q:
  
  How to Make a Bit Copy of my Internal HD to an Extneral HD?
  
  Possible Duplicate:
  How to clone a hard drive to an image that I can open later? 
  
  This question stemed from my other question:
  How do I make a bit copy of my internal hard drive to an external hard drive and check the disk for errors?
  
  A:
  
  if your external harddrive is larger than your internal i would use
  sudo ddrescue /dev/sda /dev/sdb logfile
  note: sda is your source disk sdb is your destination drive (external).
   this will also overwrite any data on your external drive
  you can install ddrescue via sudo apt-get install ddrescue
  i prefer ddrescue over normal dd becasue it gives you a nice progress bar and it will log i/o errors
  
  