I should clarify my last post. John in K may well be right that Windows does need a driver to read the disk correctly but I stick by my interpretation that "Generic IDE disk type 80" is the "missing" hard disk. Windows probably thinks that is a good enough match for the disk.

I had some fun and games when I put my hard disk into a new computer which had a card reader built in. Windows kindly detected it for me and installed a "Bulk USB storage device" and a single drive F: It took me ages to realise that Windows was WRONG and that I needed run a separate installation program on the motherboard CD to get the correct drivers and correct device (IC card reader) recognised.