This is a little-known incompatibility with dual-floppy Macintosh SEs, those
having either SuperDrives or 800K drives. As of April, 1990, there is no fix
available for system software v6.0.4.
If you need to get the configuration working, however, one of the following
workarounds may do the trick:
- Disconnect one of the floppies and connect an internal or external hard
disk.
- Configure a disk using earlier versions of AFE (say 1.1.1 with system
software 6.0.3) as you described above.