dd problem

Oliver Grawert ogra at ubuntu.com
Wed Jan 13 20:26:19 UTC 2010

Am Mittwoch, den 13.01.2010, 12:44 -0700 schrieb Karl F. Larsen:
> 	My first question is: Why does dd ruin a file system when it 
> is directed to put some files on the HD? The HD had ext3 file 
> system and it was shown as /media/disk then. Then I used dd to 
> get as much as possible from a bad HD and put it on the 
> portable HD. 
did you make sure the target device was unmounted ? dd operates on a low
binary level copying the hardware data byte by byte, its not cp which
operates on top of a mounted filesystem.


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