I remember having read somewhere you can change the firmware so it would work with hdisks?
You might be thinking of the AEC-7722 which is an Optical IDE to HD-68 SCSI adapter. And yes this works, but it doesn't have termination so it's a little finicky. Don't know about the AEC-7732, maybe that's possible as well, though I don't see a ROM on the AEC-7732, might be on the SATA side.
