26 Jan
2019
26 Jan
'19
10:47 a.m.
On Fri, 2019-01-25 at 22:43 -0800, ToddAndMargo via users wrote:
On 1/25/19 9:38 PM, fred roller wrote:
You can wipe your drive with:
dd if=/dev/zero of=/dev/[device to be wiped]
/dev/zero is the fastest I have found.
All that does is set every bit to 0. Since magnetic domains have hysteresis, suitable equipment can recover the previous state at a physical level. That's why proper trashing takes several passes.
poc