Just a few thoughts...
1. Try another floppy drive. Given the age of these mechanisms, it's always worth a shot. Use one known to be in good working order. (If you need another SuperDrive, get one that's been serviced lately or at least look for something pulled from a late 1992 or newer Mac with auto-inject, assuming you're using a Mac with this type of drive; the later ones seemed far more reliable and are distinguished by a more powerful eject noise).
2. Try another data recovery program. My personal favorite is MacTools. It won't guarantee a 100% success rate with data recovery, as no software can, but it's helped me out before. If you don't have it, be aware it's commercial software so you'll have to track down a disk on eBay or from one of the retailers such as B&R or Wayne's.
1. Try another floppy drive. Given the age of these mechanisms, it's always worth a shot. Use one known to be in good working order. (If you need another SuperDrive, get one that's been serviced lately or at least look for something pulled from a late 1992 or newer Mac with auto-inject, assuming you're using a Mac with this type of drive; the later ones seemed far more reliable and are distinguished by a more powerful eject noise).
2. Try another data recovery program. My personal favorite is MacTools. It won't guarantee a 100% success rate with data recovery, as no software can, but it's helped me out before. If you don't have it, be aware it's commercial software so you'll have to track down a disk on eBay or from one of the retailers such as B&R or Wayne's.