ddrescue had zero effect

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http://crunchbang.org – Hello Community!I am too stupid. Does anyone of you have experience with the ddrescue command? I tried to rescue a hdd that fell down and hacked in the following:sudo ddrescue -f -g -n /dev/sdc /dev/sdd logfile sudo ddrescue -d -f -r3 /dev/sdc /dev/sdd logfileThe first ddrescue command worked normally. It took a few hours because of 500 GB. There were no errors. Then I used the second command (see above). After these two commands my logfile was the following:# Rescue Logfile. Created by GNU ddrescue version 1.16 # Command line: ddrescue -d -f -r3 /dev/sdc /dev/sdd logfile # current_pos curren (HowTos)