DOD 5220.22
Overwriting a hard disk a single time either with other files or with random bits of data is not good enough, as latent magnetism can reveal some or all of the information contained in the file, according to software vendors.

The 5220.22-M specification advocates writing every sector on the disk several times with nonrandom and pseudorandom data.

Any wipe routine that implements the U.S. DOD specifications defined in the DOD 5220.22-M standard is called U.S. DOD-compliant. And because our Eraser products have such wipe methods, it means they are U.S. DOD-compliant.

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