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The notes of a madman

Wiping disks using DD

Posted by grigsby on November 29, 2012

Quick note to self.

To do a quick disk wipe:

dd if=/dev/zero of=/dev/sdl bs=8M

This could be performed multiple times using a for loop. For a more secure wipe, use /dev/random, but this takes FOREVER. For a even more secure wipe, us a 1/2″ drill bit.

To keep tabs on how the DD operation is progressing, us this:

watch -n 60 killall -USR1 dd

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