Methods of erasing

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You can select a method of erasing from the following:

• NSA

  Data is overwritten twice with random numbers and once with zeros.

• DoD

  Data is overwritten by a random number, then by its complement, then by another random number, and is then verified.

• Random Numbers

  Data is overwritten multiple times with random numbers. The number of overwrites can be selected from 1 to 9.

• BSI/VSITR

  Data is overwritten 7 times with the following patterns: 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0xAA.

• Secure Erase

  Data is overwritten using an algorithm that is built in to the hard disk drive.

• Format

  The hard disk is formatted. Data is not overwritten.