Imager?

Daniel Ankers md1clv at md1clv.com
Tue Mar 18 15:36:13 UTC 2014


On 18 March 2014 15:29, Doug <dmcgarrett at optonline.net> wrote:

>
> On 03/18/2014 06:40 AM, Nils Kassube wrote:
>
>> Ralf Mardorf wrote:
>>
> /snip/
>
>  You gave an example in your previous post where you mentioned copying
>> the MBR of a disk. In general it is useful whenever you want to preserve
>> data which are not stored in individual files, like boot loader data.
>>
> /snip/
>
>> Nils
>>
>>
>>
>>  The example ran like this:
>
>
> You e.g. can make a backup of the MBR by
>
> # dd if=/dev/sda of=MBR_backupfile bs=512 count=1
>
>
> And I don't understand it. It looks to me like the input file is the
> entire partition.
> What am I missing?


The input file is the entire partition, but then just 1 block ("count=1")
of 512 bytes ("bs=512") is copied from the input file to the output file.
 This is the first block (because there is no "skip=x") which is the MBR.

Dan
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