Wojciech Chojnowski wrote:
ddrescue -V
GNU ddrescue 1.22
This is version from fedora27.
I will try recompile from source to new version.

You should either upgrade to 1.23 or stop using -R. ddrescue 1.22 has a bug when run in reverse.

From ddrescue-1.23/NEWS:

"A bug has been fixed that sometimes marked the wrong block as non-scraped when running in reverse direction. (Bug introduced in 1.22)."

I have tested your mapfile and it is good. It just contains some finished blocks wrongly marked as non-scraped that ddrescue will need to read again.


Best regards,
Antonio.

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