as you've already been told there is no way to "zero format" a drive without using an outside piece of software! You can use any boot disk to do a plan old format. What is the reason for needing to zero fill the drive anyways? are you planning on selling it?
__________________ “Every question involves someone having to work for an answer, isn't it about time you did your share”
"Non-technical questions sometimes don't have an answer at all."
Linus Torvalds |