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I use the ddrescue to recover the data from the old hard disk, but I found it running very slow when it copy the failed blocks , can advise any options that can use on ddrescue to skip the error blocks or failed blocks , thanks !

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    Not an answer to your question, but (provided you use a log file), when reads start going slow, I find it useful to <crtl><c> the copy, then run it again with the "-r" switch so it starts copying from the end of the disk backward.
    – davidgo
    Commented Mar 31, 2022 at 3:25
  • consider using a multi-pass approach: superuser.com/questions/786488/…
    – Frank Thomas
    Commented Mar 31, 2022 at 5:28

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