From owner-freebsd-questions@FreeBSD.ORG  Wed Jan  5 18:26:24 2011
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 994FF1065696
	for <freebsd-questions@freebsd.org>;
	Wed,  5 Jan 2011 18:26:24 +0000 (UTC)
	(envelope-from xaero@xaerolimit.net)
Received: from mail-wy0-f182.google.com (mail-wy0-f182.google.com
	[74.125.82.182])
	by mx1.freebsd.org (Postfix) with ESMTP id 302AD8FC1C
	for <freebsd-questions@freebsd.org>;
	Wed,  5 Jan 2011 18:26:23 +0000 (UTC)
Received: by wyf19 with SMTP id 19so15744172wyf.13
	for <freebsd-questions@freebsd.org>;
	Wed, 05 Jan 2011 10:26:23 -0800 (PST)
Received: by 10.216.174.65 with SMTP id w43mr25637268wel.95.1294251982697;
	Wed, 05 Jan 2011 10:26:22 -0800 (PST)
MIME-Version: 1.0
Received: by 10.216.133.130 with HTTP; Wed, 5 Jan 2011 10:26:02 -0800 (PST)
In-Reply-To: <20110105152725.U49334@sola.nimnet.asn.au>
References: <20101229120038.3DFB0106591A@hub.freebsd.org>
	<20101230133126.O36121@sola.nimnet.asn.au>
	<AANLkTinCZuupW+GFMeL70nPO90tZAAJNj8g0SaOztsR3@mail.gmail.com>
	<20101231105353.S36121@sola.nimnet.asn.au>
	<AANLkTinSbE8d=iYES78GJmYO2PyOAGHMjwQ+2HT45yxc@mail.gmail.com>
	<20110102102255.00004f57@unknown>
	<20110102230702.N49334@sola.nimnet.asn.au>
	<20110103022619.O49334@sola.nimnet.asn.au>
	<AANLkTimkCdtULT9jfNtwKcfxF8R-TQ_j=qZgS-Y-YGfu@mail.gmail.com>
	<20110104143245.P49334@sola.nimnet.asn.au>
	<AANLkTi=Aqh4cpmdkHx1QsTyoYh7nhinEfDUuPO3fUAh5@mail.gmail.com>
	<alpine.BSF.2.00.1101041840310.14633@wonkity.com>
	<20110105152725.U49334@sola.nimnet.asn.au>
From: Chris Brennan <xaero@xaerolimit.net>
Date: Wed, 5 Jan 2011 13:26:02 -0500
Message-ID: <AANLkTinfVLGomOj-Nanvr4sgei-p=HQ9-Mh0rXQQ7E+w@mail.gmail.com>
To: Ian Smith <smithi@nimnet.asn.au>
Content-Type: text/plain; charset=UTF-8
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Cc: Bruce Cran <bruce@cran.org.uk>,
	FreeBSD Questions <freebsd-questions@freebsd.org>
Subject: Re: a new hard-drive in a 2y/o laptop
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 05 Jan 2011 18:26:24 -0000

On Wed, Jan 5, 2011 at 12:44 AM, Ian Smith <smithi@nimnet.asn.au> wrote:

>
> Saw Chris' later message that -F isn't there for him, but here's what
> should be, on the data, the sure-fire way to clobber that last sector:
>
>  dd if=/dev/zero of=/dev/ad4 oseek=1465149167
>
> which command SHOULD report just 512 bytes written (we're sure it can't
> write past the end of the disk with no count specified), after which:
>
>  dd if=/dev/ad4 iseek=1465149167 | hd
>
> SHOULD show zeroes from 00000000 to 000001ff (ie next block 00000200)
> If not, there really must be some hardware issue with writing?
>
> Hopefully getting there!
>
> cheers, Ian
>

[..]
Fixit# sysctrl kern.geom.debugflags=16
kern.geom.debugflags: 0 -> 16
Fixit# dd if=/dev/zero of=/dev/ad4 oseek=1465149167
dd: /dev/ad4: end of device
2+0 records in
1+0 records out
512 bytes transferred in 0.0100001 secs (51195 bytes/sec)
Fixit# dd if=/dev/ad4 iseek=1465149167 | hd
1+0 records in
1+0 records out
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
|................|
512 bytes transferred om 0.009863 secs (51912 bytes/sec)
*
00000200
Fixit#
[..]

restarting and back to sysinstall from BETA1 is nice dice ... same original
error ... can I just zero the whole drive?