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Date: Sat, 10 Jan 2009 20:47:32 +0100 (CET)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: gpeel <gpeel@thenetnow.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: wiping a drive with dd
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> Hi all,
>
> When dd is used like:
>
> dd if="/dev/0" of="/dev/da1" bs="1024"

dd if=/dev/zero of=/dev/da1 bs=1m

(or at least 64k for block size, unless you have too much time.

>
> Does it completely wipe the drive INCLUDING the boot sectors etc? (i.e. does
> it start right at secor 0 of the disk and continue to the last sector?).

yes