Keep in mind that not only is Initialization an important part of configuring RAID, but depending on WHICH RAID controller you are using, you may also need the drivers for the RAID controller.  If you are using RAID 5, you can only be using the PERC 6 or the H700. PERC 6 - should be built into Server 2008 and 2008 R2 PERC H700 - is NOT built into Server 2008 or 2008 R2: 2008x86:[URL] 2008x64:[URL] 2008 R2:[URL]        
we have purchased a new Dell R710 Server with three Hard Disks of 300GB Each. have successfyull configered RAID 5. but windows server 2008 std edition not being installed. when the setup reach on the selection of drives it shows error message "NO DRIVES FOUND"...   Please Help in this regard  
Problem installing Windows Server 2008 Std edition on Dell R710