Re: [Bug-ddrescue] Skipping over tar pits

[Antonio Diaz Diaz]

Ole Tange wrote:
> > As ddrescue is currently scraping, and -a only works during the copying
> > phase, maybe a combination of --try-again and -c1 (perhaps with a large
> > --skip-size if the drive is not returning errors) could solve your problem:
> >
> >    ddrescue --try-again -c1 --skip-size=50MB
>
> That still keeps me in the tar pit. I get read rates of 1.7 KB/s.

If you are using ddrescue 1.22 and a suitable --min-read-rate, ddrescue 
should read all the good areas in passes 1 and 2, and leave all the tar 
pits for passes 3 and 4. Try something like this:

  ddrescue --cpass=1,2 --try-again -c1 --skip-size=50MB -a 100k 
/dev/sdd disk.img disklog


> Can I say: Start at byte 100G and read backwards?

Yes, 'ddrescue -s 100G -R'. But I expect the command line above to work 
better.


Best regards,
Antonio.