My Life as Inukai-san's Dog - Vol. 8 Ch. 51 - Doggy Dance

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"Reflecting its original requirements, the DoD 5220.22-M data sanitization method, or the DoD 3-pass method, is usually implemented in the following way:
  • Pass 1: Overwrite all addressable locations with binary zeroes.
  • Pass 2: Overwrite all addressable locations with binary ones (the compliment of the above).
  • Pass 3: Overwrite all addressable locations with a random bit pattern
  • Verify the final overwrite pass.
Erasing an HDD using the DoD 5220.22-M data sanitization method will prevent all software-based file recovery methods, as well as hardware-based recovery methods, from recovering meaningful data from the drive."

Phew 😓 - all done, carry on lads!
 

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