Re: [bug-ddrescue] Only going backwards

[Antonio Diaz Diaz]

Hello Barry,

Barry Allsop wrote:
> Firstly ddrescue is excellent so thank you.

You are welcome. :-)

> I have it on all my computers lastly iMac now the issue I'm having is the
> unrecognised disk size.

Ddrescue can't detect the size of a raw /dev/rdiskN device. See 
http://www.gnu.org/software/ddrescue/manual/ddrescue_manual.html#Direct-disc-access

"On some systems, ddrescue can't determine the size of a raw device, so an 
explicit --size or --complete-only option may be needed."

> It reads 9223 PB now this was not issue first time tried but experimenting I
> selected -R per[s foolishly in hindsight not its stuck in reverse mode.
>
> When ever I use mapfile its auto starts in reverse (regard less of selected
> disks) I presume at some Imaginary 9223 PB location and nothing happens.
>
> I tried wiping all mapflies I can find but still it starts in backwards mode as
> soon as it starts cloning with mapfile, if I leave mapfile off the command it
> works.
>
> I presume their is a hidden log somewhere

It is not hidden. From your command line I can see that it is named mapfile, 
and it is in the directory from which you are running ddrescue. Just delete 
it, or run ddrescue with a small --size and then with the right --size to 
reset it to forward mode.

Hope this helps,
Antonio.