Yeah, that SCSI statement is pure crack. The seller screwed up. I suppose you might be able to weasel out of the deal because of that...

If you want to get way-over-the-top technically most drives today, be they SATA, USB, whatever, from a software standpoint use a modified subset of the SCSI command set and thus present themselves to the OS essentially as if they were SCSI drives but that doesn't help you much when it comes to stuffing a mini-PCIe SSD into a Duo.