While is it true there are a few extra cylinders/sectors on a drive to account for bad ones and a LOW LEVEL format with the right tools could allow you to access them the most you could gain is 2% to 5%, I used to do this with SCSI drives back in the day but this report is nothing by MULE FRITTERS, you want more space buy a bigger drive.. don't believe everything you read, if that was true I would be a 6'11 220 pound blonde hair blue eyed Man with a body like a greek god and Money like bill gates.