![]() To use the DoD 5220.22 – M advanced method to wipe the data, you should rely on the best DoD data wipe tool. With DoD taking the upper hand in the comparison, let us now look at how to use them in this review. If you were to conduct a Gutmann wipe, it would take 350 hours or nearly two weeks. It must be approximated based on the size of your drive for example, a 1TB disc should take roughly 10 hours to wipe via USB 2.0. That same 20 GB hard disc will take the better part of a day to erase using a DoD-approved level of data erasure, which employs nine passes of random writes. Gutman method vs DoD: Estimated Wipe Time
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