Date: Tue, 29 Sep 2009 18:15:00 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: RW <rwmaillists@googlemail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Disk Cloning Message-ID: <alpine.BSF.2.00.0909291813290.44648@wonkity.com> In-Reply-To: <20090929120406.269d3505@gumby.homeunix.com> References: <20090928011444.29110022@chris.makeworld.com> <20090928213703.ecf59a9d.freebsd@edvax.de> <d36406630909281707k5c2e9cb6id46400594643cf7@mail.gmail.com> <20090929022231.9a92783f.freebsd@edvax.de> <20090929023233.69b37187@gumby.homeunix.com> <alpine.BSF.2.00.0909282008020.40345@wonkity.com> <20090929120406.269d3505@gumby.homeunix.com>
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On Tue, 29 Sep 2009, RW wrote:
> On Mon, 28 Sep 2009 20:08:43 -0600 (MDT)
> Warren Block <wblock@wonkity.com> wrote:
>
>> On Tue, 29 Sep 2009, RW wrote:
>>
>>> On Tue, 29 Sep 2009 02:22:31 +0200
>>> Polytropon <freebsd@edvax.de> wrote:
>>>
>>>> doing 1:1 copies with dd is always possible and will
>>>> keep content identically; remember to copy the MBR separately
>>>> with bs=512 and count=1 from the /dev/ad{source} device.
>>>
>>> Why?
>>
>> Because it contains the partition table.
>
> Right, but why separately, rather than with the rest of the disk?
For me, it would be because dealing with an individual 512-byte
partition table file is easier than decompressing a multi-gigabyte image
file to get at the first 512 bytes.
-Warren Block * Rapid City, South Dakota USA
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