$ curl cheat.sh/
# ddrescue
# Data recovery tool that reads data from damaged block devices.
# More information: <https://www.gnu.org/software/ddrescue/>.

# Take an image of a device, creating a log file:
sudo ddrescue /dev/sdb path/to/image.dd path/to/log.txt

# Clone Disk A to Disk B, creating a log file:
sudo ddrescue --force --no-scrape /dev/sdX /dev/sdY path/to/log.txt

$
Follow @igor_chubin cheat.sh tldr