I had a bit of an issue with the PERC 2/SC scsi controller on my dell power edge 2300/450 (Dell 440GX) where, during the installation of SLES 10, the installer refused to recognize my scsi controller and gave an (no hard disk found or something like that).
A bit of googling bought me to a place where a guy mentioned that you could change the emulation (under Objects, Host Adapter in the PERC configuration menu) from I20 to MASS HARDWARE. That I did and on rebooting, my system just froze and wont even proceed with the install. I then flashed the firmware for PERC 2/SC from 3.13 to the older 3.0 . Then proceeded with reboot and everything worked like a charm!