Re: [Bug-ddrescue] GNU ddrescue 1.23-pre1 released

[Antonio Diaz Diaz]

Hello Gábor,

Gábor STEFANIK wrote:
> >     * The new option '--same-file' has been added. It allows infile and outfile 
> > to
> > be the same file or device. This can be used to test the writing ability of a
> > drive. It can also be used to copy part of a file to another location inside or
> > beyond the end of the same file if '--input-position' and '--output-position'
> > are different.
>
> Are overlaps handled correctly (like bitblt)? That is, can I safely
> use this feature to e.g. shift a 20GB partition backwards on a disk
> by 2GB?

Interesting question. :-)

Overlaps are not handled at all (and there are no plans to do it. 
Shifting data is just a side effect of '--same-file', not the main task 
of ddrescue). But you can possibly shift your partition safely if you 
chose the right copy direction. I'll run some tests and will document 
the findings in the description of '--same-file' in the manual.


Thanks,
Antonio.