I have tried everything I know to fix this plus on-line suggestions for 5 days. Could it be the biosVer.1.8 ( it list the secondary but won't detect) or could it be the Nvidia nForce4-S(LI chip on The MSI K8N SLI/F, MS-7185 ? I've done the cables, jumpers, PSU, Memory, fix MBR, replaced the MBR, a slue of different drivers (those from MS, Nvidia and MSI). the only thing I found was, the secondary controller wasn't assigned an IRQ. I tried to assign it one, didn't work. I stripped down the unit to just the primary HDD,CD-Rom,and video card. I tried Windows 98 boot disk to "fdisk" Fdisk'' did not see the secondary. I've taken the motherboard out and looked it over at lease 6 times,front and back. Taken the fan of the nForce4 chip and looked and compaired it to pictures I found on the Internet "Looks OK" One deviation, there appears to be a drop of expoxy on one of the upper right connections. I've heard of Nividia doing that to prevent modifications. D-bracket lights are normal on the board. Device Manager says everything is working, even says all IDE are working. So there you have it, Men ! "Whats Up with this thing" ? Thanks, DaveC