There may be a better way, but if it were me...
I'd stick the drive in a PC, FDISK it to a single partition, fomat it FAT32, install a nice quick Windows OS (e.g. 95 - quick to INSTALL not use!) and check it is all working fine... then FDISK it again and try it in the Amiga WITHOUT attempting to format it again on the PC..
Hopefully you would then see the drive electronically and could format it (quick) on the Amiga. You would also know that it is fully working (assuming it did) and merely needs to be properly configured for the Amiga or vice versa.
