Might want to check your jumpers as well to make sure you're properly mastered/slaved, or cable selected for all drives *GAG*
That, and make sure that the information in the BIOS is set according to the drive specifications, such as Sectors, Cylinders, Heads information. Sometimes your BIOS will not detect this information and it'll need to be force-fed.
Looks like Deepspacer's got me beat.
My first hard drive had a conner 800mb drive in it, I believe I got in to this all back in '96, but I've been messing with computers all my life. started out on the Apple II's of course..
I remember the days where if I got to work on the macintosh, that the mouse was the coolest thing evar. Now I sometimes loathe picking up my logitech MX1000 wondering if it'll be screwy today or not.
I still have a working Sound Blaster 16! Pair that up with my Pentium II Seattle 440BX motherboard and it's a killer rig for the good old DOS games. Man, having to set up your IRQ, DMA, all that good stuff, I miss those days...