From owner-freebsd-questions@FreeBSD.ORG  Sat Mar 11 15:18:18 2006
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 72DC716A422
	for <freebsd-questions@freebsd.org>;
	Sat, 11 Mar 2006 15:18:18 +0000 (GMT)
	(envelope-from infofarmer@gmail.com)
Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.204])
	by mx1.FreeBSD.org (Postfix) with ESMTP id E9F2C43D46
	for <freebsd-questions@freebsd.org>;
	Sat, 11 Mar 2006 15:18:17 +0000 (GMT)
	(envelope-from infofarmer@gmail.com)
Received: by wproxy.gmail.com with SMTP id i3so1066450wra
	for <freebsd-questions@freebsd.org>;
	Sat, 11 Mar 2006 07:18:17 -0800 (PST)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com;
	h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references;
	b=rrOqoQL2m+kQQfZh9KPMGwD+TsrNNVUa0Tsc2of6D6bDkWRKLQ5jMH9clbPUgeU55YgS/Zq4ms8j6nDx1Qx1xDLvkhECpSZGh5ZfFDMKczbhF1sqlUqKsxegGWt6bAfvHs1NKIHqhwb52bXjXKEtrl7wAhurG0CPhQeHplw0BMg=
Received: by 10.54.147.14 with SMTP id u14mr1413888wrd;
	Sat, 11 Mar 2006 07:18:16 -0800 (PST)
Received: by 10.54.105.5 with HTTP; Sat, 11 Mar 2006 07:18:16 -0800 (PST)
Message-ID: <cb5206420603110718m3c671f91n147b1d3ab6aefac8@mail.gmail.com>
Date: Sat, 11 Mar 2006 18:18:16 +0300
From: "Andrew Pantyukhin" <infofarmer@gmail.com>
To: "Grant Peel" <gpeel@thenetnow.com>
In-Reply-To: <001901c64517$9d891950$6701a8c0@GRANT>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
References: <001901c64517$9d891950$6701a8c0@GRANT>
Cc: freebsd-questions@freebsd.org
Subject: Re: dd - cloning a disk.
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: Sat, 11 Mar 2006 15:18:18 -0000

On 3/11/06, Grant Peel <gpeel@thenetnow.com> wrote:
> Hi all,
>
> Here is a simple (I think!) question for the I/O savy among you:
>
> If I had two identical disks, say, 73 GB Seagate 10K SCSIs, one completel=
y
> operational fully setup FreeBSD with all the trimmings, and the other bla=
nk,
> or perhaps loaded but no longer usable, is 'dd' and appropriate tool to
> completely clone the Good disk to the not so good disk....therefor making
> the second disk identical to the first? Bootable and all?

It is, with a few 'buts'. Firstly, the source should be mounted
read-only. Secondly, you should copy the drive device itself
(ie da0 to da1) instead of its partitions (ie da0c).