Is the main drive set correctly?
Some old drives has temperamental interfaces, and don'y always work well with slave drives.
Try putting the secondary drive onto the cable with the optical drives (or even instead of them) in order to do the cloning.
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?