I had a problem installing Novell Open Enterprise Server on Dell Optiplex 755 or 620. It was the drivers. The problem is that the installation runs fine from CDs, but when it finished, the operating system could not find the hard disks. It used the module IDEATA to put several slots for drives, however it does not run.
I could run it when I changed to the drivers from the page http://developer.novell.com/devres/storage/drivers/
The hard drives are up, voila. Now, It works fine.
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.