How to backup a disk with crc errors?

Hi,
I follow these howto to recover partition, because when I’m trying to make a backup image of the disk gives an CRC error:
https://blog.urbackup.org/319/how-to-handle-data-error-cyclic-redundancy-check-system-error-code-23

When I execute scrub_disk.bat and I’m trying to repair the sectos it says me:

So it’s impossible to do the backup of the disk. Anyone could help me please?
Thanks and sorry for my English!