Ralf Mardorf kde.lists at
Tue Mar 18 15:42:29 UTC 2014

On Tue, 2014-03-18 at 11:29 -0400, Doug 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?

Nils' explanation regarding to the OP's needs is better than mine, but
for good reasons, I gave this MBR explanation and mentioned to take a
look at dd --help. To be fair, with my broken English the explanation of
the "bs" option is disgusting and it might be not understandable for you

dd is a powerful tool, you are missing the "bs=512" :).

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