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Possible Duplicates:
Erasing data before selling a computer
How to wipe a USB hard drive

Hi guys!

I have internal and external hard drives. I don't want to have to go through and delete each one manually. I don't have that kind of spare time. Do you know about some tested software or something?

thanks a lot. I have windows 7.

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marked as duplicate by Nifle, quack quixote Jun 22 '10 at 7:26

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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2 Answers 2

  • Bootable CD: DBAN (Darik's Boot And Nuke).
  • Alternatively, a bootable Linux CD with the program 'wipe'. That one would be more complex to use though, as you are more familiar with Windows.

I assume that you don't want any of the data on those drives, EVER again. If that is not the case, these are the wrong tools.

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Also a simple dd if=/dev/random of=/dev/sdX works quiet well for deleting everything (including the partition table) on the drive. If you want it clean and nice afterwards you can use dd if=/dev/null of=/dev/sdX. –  Bobby Jun 22 '10 at 7:05
    
Having used (or attempted to) your method, you will find it absurdly slow. I would be surprised if you wiped a gig before the week was out. /dev/random only uses real entropy. You run out of entropy really fast. /dev/urandom is better. It will keep going at a moderate clip but drain all of your CPU generating cryptographic random numbers. I suggest a combination of wiping and random numbers (which is what DBAN and wipe do), but if you are cleaning it against an unsophisticated attacker, dd if=/dev/zero of=/dev/<device> would work fine. (/dev/null doesn't output anything, use /dev/zero) –  Slartibartfast Jun 23 '10 at 2:48
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Do you want to continue to be able to use these drives?

If not, a large hammer is the fastest solution.

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