Re: [tlug] How to wipe disk . . . . . . . . . . . . . . . . (was formatting HDD leaves 11.7 GB untouched

["dblomber@example.com" <dblomber@example.com>]

On 2019-12-07 9:02 AM, jep200404@example.com wrote:
> On Mon, 2 Dec 2019 10:48:19 +0900, Thomas Blasejewicz <nyuwa@example.com> wrote:
>
> > How can I wipe the disk ENTIRELY clean?
>      sudo dd if=/dev/zero bs=1M of=/dev/sdz
For normal use that may be enough, but is not terribly secure by itself. 
I would use /dev/urandom and three passes. This can take a long time and 
if not sensative info the /dev/zero will be quick and good enough for 
most your needs.