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Date: Wed, 4 Aug 2004 11:59:40 +0200
From: Ruben de Groot <mail25@bzerk.org>
To: Livhu Tshisikule <livhu.tshisikule@telkomsa.net>
Message-ID: <20040804095940.GB40948@ei.bzerk.org>
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	Livhu Tshisikule <livhu.tshisikule@telkomsa.net>,
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References: <200408041049.26858.livhu.tshisikule@telkomsa.net>
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cc: freebsd-questions@freebsd.org
Subject: Re: Mirror hard disk using dd.
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On Wed, Aug 04, 2004 at 10:49:26AM +0200, Livhu Tshisikule typed:
> Hi,
> 
> I installed a second harddisk on my FBSD 5.2.1 box and then use dd if=/dev/ado 
> of=/dev/ad1. I later removed my first disk so that I can test the second 
> disk. After booting it goes to single user mode and then I used fsck -y 
> command. I then mounted the /usr only to find that id did not copy everything 
> from the first disk.
> 
> 1. I want to make an exact copy of the first disk, how can I do that.
> 2. Later I want to copy what has changed to disk2 once a day. 

use dump(8) and restore(8)