Before we all start whipping out our sliderules here, let's back up a moment to clarify something:
Are you able to read the drive's info, but incorrectly, or are you not even seeing the drive?
You see, the only Amiga that has an actual SCSI port built-in is the A3000, and the only add-on SCSI controllers that will use the default scsi.device are made by Commodore (A2091, etc.). HDToolbox uses the scsi.device as default. If you're using a GVP, then you need to change the icon's .info to reflect this (change "scsi.device" to "gvpscsi.device").
So, what I'm saying here is could we have more info on what this drive is being plugged into and how it's set for ID and termination?
banzai
(I use a Pickett AF-2, myself!)