I have been trying to install debian 5.0.7 amd64 on a Rackable Systems Dual AMD Opteron server which has an Areca ARC-1110 hardware RAID controller installed. I have 2 250GB drives configured as RAID 1. The debian install saw it as only one drive, just as it should. Install went smoothly, but on reboot, the system would not load. I did some research and tried a couple of things with no luck. Like adding a rootdelay in the grub command. It juts sits at "loading system" for a while then times out and loads busy box. Just to check things out, I booted into an Ubuntu live-cd and mounted the volume. The file system is there and all of the necessary files. I am sure the issue is that the arcmsr module is not being loaded by the kernel on boot. I found some instructions related to getting these cards working in Debian by making a custom installer, but those were for debian 3 and seriously outdated. I have the already compiled acrmsr.ko file taken from the scsi-extras-modules udeb. I have been able to load it successfully in a vmware test environment using insmod. I am really not sure where to go from here. Why does the install see the disk fine and then not load? Why is it that Ubuntu server installs fine as well as CentOS? How do I get Debian to work with this hardware? I really don't want to have to switch distros. Everything I have worked on already is in debian. Thanks in advance for any advice!