[Cialug] Transplant OS

[David Champion]

chris wrote:
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>> I believe you can set the UUID of the partitions on the new drive. "It
>> is an power so great, it can only be used for Good or Evil".
>>
>> I don't believe there are any open-source tools which can create a
>> back-up and restore to bare metal. There's always tools like Acronis,
>> but they cost.
>>
>>     
>
> dd (or even cat) can  along with your favorite boot cd (I use knoppix)
> can do bare metal restores.  Either from a backup image on attached
> media or over the network.
>
> If local attached media,  or nfs, some net file system,
>
> dd if =/path/to/wholediskimage  of =/dev/newlocaldisk
>
> Over ssh/rsh:
>
> ssh remotehostwithimage 'dd if=/path/to/whilediskimage bs=1400' >
> /dev/newlocaldisk
>
> This is much faster with rsh since no encryption is done.
>
> As long as the second device is bigger, you will usually be ok.  You
> can use something like parted to reclaim any unused disk if the
> destination was larger.
>
> I once set up an imaging server that simple streamed a whole disk
> image to any device that connected to a port on it.  This was done
> using xinetd and dd.  I chose dd over cat because I could set the
> block size to 1400 and get a more full packet.  More efficient,
> faster, less IP overhead.
>
> That reminds me, you can read a compressed image as well, works great
> because you are moving compressed data over the wire:
>
> ssh remotehostwithimage 'dd if=./diskimage.gz bs=1400'  |  gzip -d - >
> /dev/newlocaldisk
>
>
> All my examples are whole disk, but you can do the same per partition.
>
> To create the back up images reverse the process.
>
> crr/arreyder
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The problem with using dd... as has been pointed out in the past here... 
is if you have corrupted sectors, dd may copy the corruption.

-dc