You can find a lot of information on the Intel® Server System S7000FC4UR on the product support website.
The S7000FC4UR utilizes an optional SAS Riser Board which natively supports Integrated RAID levels 0, 1, and 1E. If an optional Intel® RAID Activation Key and DDR2-667 registered DIMM are installed, hardware RAID levels 0, 1, 5, 6, 10, 50, and 60 are enabled. See the Product Guide for more information.
The Specification Update lists accessory parts numbers for the S7000FC4UR.
There are compatible RAID controllers you can use. See the S7000FC4UR Tested hardware list.
Intel announced Product Discontinuance for the S7000FC4UR February 01, 2010. Product Discontinuance means that the System and accessories are no longer manufactured by Intel.