I have an X5DPL-8GM motherboard with an Adaptec 2010S running RAID-5. When I install NT 4.0 Server, the installation program keeps saying that no hard disk is found even though I've loaded the RAID card driver.
When installing NT, you should press F6 after the CD is booting and before it enters the installation program in order to install the RAID card driver. Otherwise, you will see "no hard drive found".