From owner-freebsd-questions  Sun Sep 30 23:33: 1 2001
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Date: Mon, 01 Oct 2001 08:32:51 +0200 (CEST)
From: Micke Josefsson <mj@isy.liu.se>
To: Mario Doria <madd@tecdigital.net>
Subject: RE: Copy a disk using dd
Cc: FreeBSD Questions <questions@FreeBSD.ORG>
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It works if you are absolutely certain that the disks are EXACTLY identical.
I.e. the disk you are copying to only have bad sectors in common with the source
drive. Are you willing to take that risc? Probably not.

Format the second disk then use tar or cpio to get the info over.
Off the top of my head:

cd /wherefrom
find . -depth -print | cpio -pudm /whereto

or according to man tar(1):

   To move file hierarchies, use a command line like this:

     tar -cf - -C srcdir . | tar xpf - -C destdir


/Micke






On 30-Sep-2001 Mario Doria wrote:
> Hi,
> 
> On some machine with 2 identical disks, I want to copy everything on the
> first drive to the second drive (mirror copy). The disks are da0 and da1.
> I'm thinking of using:
> 
> dd if=/dev/da0 of=/dev/da1 bs=8192
> 
> Is this OK?
> 
> The purpose of this is to later remove the second hard disk, and use it on
> another machine (like installing using Norton's Ghost). Both machines are
> identical, I just don't want to do two separate installations.
> 
> Thanks,
> 
> 
> Mario Doria
> 
> 
> To Unsubscribe: send mail to majordomo@FreeBSD.org
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Michael Josefsson, MSEE
mj@isy.liu.se

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