What is the BIOS date of this board? Look in the bottom left corner of the first video image.. there is a string of characters that denote the model and "conception" date.
Found two sites with Soyo BIOS updates.. your model is listed at WIMSBIOS.. http://www.wimsbios.com/biosupdates/soyo.jsp
.. but no date of the version. And also at http://www.downloadplex.com/Drivers/BIO ... 0-0-0.html
is a listing for a near-identical model.
The BIOS must be specific to a model, or certain features may not respond.
With some older BIOS types, there may be a choice as to how the drive is noted.. "normal", "large" or "LBA" method. For any drive larger than 20 gigs, use the "LBA" method. If the drive is not seen by the BIOS, then divide the cylinder count by four, and multiply the head count by four. Do not change the sector value.
Have had success with older BIOS dates of 2001 or so accepting 60 GB drives, as long as the primary partition is within the BIOS limits of recognition. But regardless, the statistics should be noted in the splash screen, even if the drive is not accessible for use. Set the BIOS pages concerning the IDE drive specs for 'all active' and enable the enhancements. As to connections, if using an 80-wire ribbon, ensure the master connector
is used only with a drive with jumpers set as master. The lone connector is for the mobo header (typically blue), the far end is the master connector (typically black).. and the one closest to that is the slave connector. Connecting otherwise will not work.
If the drive stats are shown, then access should be good. But if the stats are not shown, then there may be a hardware failure (chipset or data ribbon, bent pins) that is causing the problem.
F@H.. to solve mankind's maladies.. in our lifetimes!