Hi guys!
I decided to try openMosix. I downloaded a plain old kernel from kernel.org (version 2.4.20 should you care). I then patched the kernel with the patch distributed from openmosix.sf.net. I make a script that recompiles my kernel for me.
The kernel, using my old config, compiled fine. I made sure to run mkinitd. When I try to boot the new kernel, problems arise.....I get an error at the tail end of the boot saying "cannot find rootfs on "/" or "hd0:0"

Now, the other 2 kernels I have boot fine. All 3 have a line that say root(hd0:0), so I don't think that's it. BUT, I remembered something....my boot partition is on hda1, while the root FS is on hdb1. I thought that may have soemthing to do with this, so I changed the openmosix kernel to read "root(hd1:0)" with no luck. Is there a kernel option I overlooked? What are some possible reasons that it cannot boot my root FS? Any and all help is greatly appreciated.

did you add the line for the initrd to load in the bootloader configuration?

also what file system are you using and is the support for it as a module or built-in?

well, I used make oldconfig, so I assume that EXT3 (the fs being used) got included, but I have no clue as to whether or not it was a module or actually part of the kernel. I have tried building multiple times, both with ETX3 as a module and as a direct include. No luck either way.

The line for the initrd is right after the kernel like, just as it appears in the other 2 configs.

Always a safer bet to include your root fs in the kernel and not as a module... Default configs tend to have it as a module.