Re: dd for failing discs?

[Bernhard Voelker]

On 02/12/2014 10:31 AM, Pádraig Brady wrote:
> On 02/12/2014 08:08 AM, Bernhard Voelker wrote:
> > Would it really be that bad to use something like the following?
> >
> >    dd if=/dev/sda1 of=sda1.img conv=noerror iflag=fullblock
> >
> > If this is true, we could add a link like
> >    http://www.gnu.org/software/ddrescue/
> > into the Texinfo manual, otherwise, we should add an example
> > like the above.
>
> This was discussed in http://bugs.gnu.org/6667
> You would need conv=sync to pad out the unreadable parts.

ah, right. I missed that flag somehow.

> The example from there would be useful in the docs.
>
> > (AFAIK tools like ddrescue try an adaptive approach for
> > 'ibs' values on failing sectors, and have other sophisticated
> > features like backup merging - admitted.)
>
> Right, so would be good to mention along with the example.

Thanks, I'll prepare a patch for the docs, then.

Have a nice day,
Berny