Le primidi 21 brumaire, an CCXXV, Andy Smith a écrit : > You are better off using GNU ddrescue for taking images of > possibly-failing devices. IIRC, there is a catch there: there is another program with a very similar name that does not work the same way. Be careful when installing it. > Amongst other issues, dd will either give up or produce zeroes when > it encounters problems whereas ddrescue will keep track of where it > was unable to read and keep trying. For the record, when using dd to copy data from a damaged medium, always use conv=noerror,sync. Without noerror, dd would stop at the first error and without sync it would just skip the block, making the dump useless. But of course, as you say, ddrescue keeps a log of the parts that could not be read, which is even more useful. Also, I would advise to dump to a file, not a raw partition.
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