OK. I just got brand new floppy cable for PC and connected to my Amiga:: DFO:Unreadable under AmigaOS3.9.
It is interesting because I can boot from that floppy drive and it seem to work fine, only under AmigaOS is not working properly. I'm using 1.76 floppy drive.
Can someone please help me? I'm not sure how to fix it.