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Post by victorgrant on Feb 28, 2018 13:11:47 GMT
Hi, The 35 pass Gutmann method was conceived at a time when very old technology pre early 1990’s was employed in hard drives. It was used to allow for the inaccuracy of writing heads fitted to those drives which could result in the head writing slightly to one side of the target data. The accuracy of header servo positioning mechanisms and the density of disk platters have increased exponentially since then. With this in mind it is generally considered the 35 pass Gutmann method is unnecessary. In fact Peter Gutmann himself says so ! For more Details: Sustainable Energy Video
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