Don't wish to down a motherboard manufacturer, as it isn't good business, but I would use a SOYO mobo for a frisbee.
You've indicated that the primary master IDE isn't recognized?
Is this by looking in BIOS Setup?
Have you tried to set the harddrive's parameters manually in BIOS Setup?
Set the Cylinders, Heads, and Sectors?
The Cyl, Heads, and Sec information for each harddrive can be found by looking at the label on the top of the harddrive.
If it isn't listed go to the harddrive manufacturer's website, and use the model number off of the harddrive, to find said information.
Example using Seagate harddrive,
Barracuda, Model number ST3500830A
500GB.
A) 16,383 Cylinders
B) 6 Heads
C) 63 Sectors
Also depends on what flat ribbon IDE cable you're using.
With a 40-wire flat ribbon IDE cable the primary harddrive plugs into the Middle of the cable.
With an 80-wire flat ribbon IDE cable, the primary harddrive plugs into the End connector of the cable.
(Both styles of IDE cables have 40-pins. Actually 39 as 1 is not used)
http://www.mikeshardware.com/howtos/howto_connect_ide_hd.html(Look under the heading - Connecting Your Hard Drives)
Plus you may want to check the continuity of each flat ribbon IDE cable's wires.
Use a multimeter set to Ohms.
Due to the age of these cables they can go bad.
Regards,
joecoolvette