How to clone HDD in an External HDD in ubuntu 11.04

[J. Bakshi]

On Thu, 23 Feb 2012 15:24:44 +0800
Koh Choon Lin <2choonlin at gmail.com> wrote:

> Hi
> 
> > dd_rescue -v infile outfile
> >
> > so
> >
> > dd_rescue -v <partition to read>  <<partition to  write>
> 
> Curious to know the reason why ddrescue is preferred to dd?
> 
> 
 It tries to read and if it fails, it will go on with the next sectors where tools like dd will fail.