A question about dd

Joel Roth joelz at pobox.com
Fri Sep 18 22:06:59 UTC 2015

Anders Holmberg wrote:
> Hi!
> Does the dd command do a sector by sector copying of a harddisk?
> If so then one can do a backup of for example a windows partition with a damaged bootsector?

Hi Anders,

Probably by "damaged" you mean "corrupted" e.g. so Windows
doesn't boot up. In this case, dd *can* make a backup copy. If you want
Windows to boot, you can install a bootloader such as Grub,
or you may be able to restore the MBR by starting Windows
from a rescue disk.

Hope this helps,


> Thanks.
> /A
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Joel Roth

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