HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It

Posted by Chris Hoffman on How to geek See other posts from How to geek or by Chris Hoffman
Published on Sun, 03 Jun 2012 10:00:07 GMT Indexed on 2012/06/03 10:43 UTC
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You’ve probably heard that you need to overwrite a drive multiple times to make the data unrecoverable. Many disk-wiping utilities offer multiple-pass wipes. This is an urban legend – you only need to wipe a drive once.

Wiping refers to overwriting a drive with all 0’s, all 1’s, or random data. It’s important to wipe a drive once before disposing of it to make your data unrecoverable, but additional wipes offer a false sense of security.

Image Credit: Norlando Pobre on Flickr

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