Trying to rescue data from a bad SD card

Nils Kassube kassube at
Wed Mar 4 20:45:33 UTC 2009

David Curtis wrote:
> On Wed, 4 Mar 2009 08:44:36 -0900 (AKST)
> Damien Hull <dhull at> wrote:
> > root at dhull-dell-laptop:/tmp/SDCARD# dd if=/dev/sdb of=data2
> > dd: opening `/dev/sdb': No medium found
> I think your sol. But just in case, wouldn't it be /dev/sdb1? I'm
> saying this with no experience whatsoever with dd.

If the device sdb1 exists it is the first partition on the entire disk 
sdb. You can use both devices but with sdb you will get an image of the 
entire disk while sdb1 would get you only that particular partition. 
The advantage of using sdb would be that you could recover some more 
data if the partition table was faulty.


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