The current install cd (install-amd64-minimal-20110421.iso) is missing the hpsa driver. On a brand new DL385G7 server, the CCISS driver has removed support for the SmartArray controller in question (as I needs to run HPSA). As the HPSA is not on the disc, the server cannot be installed.
I've fixed this on the amd64 and x86 kernel specs. We need to fix the installcd building failures before we can get new a new iso using the updated specs.
Please test with the latest ISO and check if it works. The amd64 ISO from last week should work and I hope we'll get today a new X86 ISO that should also work. Reopen if it fails for you.