From owner-freebsd-current@freebsd.org  Tue Sep 27 04:37:29 2016
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Date: Tue, 27 Sep 2016 06:37:26 +0200
From: "O. Hartmann" <ohartman@zedat.fu-berlin.de>
To: Ngie Cooper <yaneurabeya@gmail.com>
Cc: Ernie Luzar <luzar722@gmail.com>, "Hartmann, O."
 <ohartman@mail.zedat.fu-berlin.de>, FreeBSD CURRENT
 <freebsd-current@freebsd.org>
Subject: Re: Destroy GPT partition scheme absolutely, how?
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On Tue, 27 Sep 2016 00:36:22 +0900
Ngie Cooper <yaneurabeya@gmail.com> wrote:

> > On Sep 26, 2016, at 22:48, Ernie Luzar <luzar722@gmail.com> wrote:  
> 
> ...
> 
> > This little script has been posted before. Maybe it will be what your
> > looking for. Called gpart.nuke
> > 
> > #! /bin/sh
> > echo "What disk do you want"
> > echo "to wipe? For example - da1 :"
> > read disk
> > echo "OK, in 10 seconds I will destroy all data on $disk!"
> > echo "Press CTRL+C to abort!"
> > sleep 10
> > diskinfo ${disk} | while read disk sectorsize size sectors other
> > do
> > # Delete MBR and partition table.
> > dd if=/dev/zero of=/dev/${disk} bs=${sectorsize} count=1
> > # Delete GEOM metadata.
> > dd if=/dev/zero of=/dev/${disk} bs=${sectorsize} oseek=`expr $sectors - 2`
> > count=2 done  
> 
> Why not just use "gpart destroy -F provider"?
> 
> Cheers,
> -Ngie
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Yes, why not :-(

Maybe panic and too much swet on the forehead ... ;-) Thanks.