Sounds like you've got a problem similar to mine.

The drivers for your RAID controller are already built into the KNOPPIX kernel. Unfortunately, the initial RAM disk (initrd) doesn't have those same drivers to help the boot loader find the kernel. In other words, the boot loader doesn't have the drivers it needs to find the kernel. In your case, it doesn't matter that the kernel itself has the drivers built-in because we can even find the kernel!

Did you happen to make a boot floppy during the hdinstall? Does that work? (If you did, I'm not too confident that it would work anyway).

I've asked FabianX (via e-mail) to shed some light. Once I get a clue, I'll pass on the needed information.

For more on my situation, ...
http://www.knoppix.net/forum/viewtopic.php?t=5853

-SUO