Very often, a few missing sectors will not even be noticeable (even a few hundreds). And after clicking on image you can choose where to save it. If you click on options you can choose to only produce an ISO image on disk. I often set it at 1 on my first attempt, just to check how many sectors give me trouble. You also fix the number of reading attempts to a fairly low value since repeats can sometimes take a long time. Then you click on "ignore reading errors" so that it will not stop at the first error. You must click advanced setting in the small one. You get a large window, and a small copying window. I have good personnal experience with K3b, with proper settings: Second line will use direct disc access to try to read more and write it to the same output file. The first line will extract the easily readable data from the DVD. The suggested usage for DVDs (from the Gnu ddrescue manual) is: ddrescue -n -b2048 /dev/cdrom cdimage mapfileĭdrescue -d -r1 -b2048 /dev/cdrom cdimage mapfile It will instead try to fill in the holes by looking at the map file to find out which sectors to try to read again. Gnu ddrescue uses a map file and is able to write many times to the same output file without doing the same work again or overwrite previous successful reads. Gnu ddrescue is the newer one and designed to overcome some of the problems in the older ddrescue. There are two programs called ddrescue (see ). I read recommendation for it, but I do not have experience.
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