Another thread about dumping diskette problems - SOLVED

[SomeGuy]

These drives are the only ones I have found that actually need the jumper change. All of the other drives I have work without any changes required.

Well, my FD-55GFR 149-U didn't want to read data if it could not find an index. I don't recall any of the jumpers being anything that might correct that. I thought I also tried a Y-E data with the same results, but now I don't quite remember, it was a little while back.