If you want to configure the server storage drives in a redundant array of independent disks (RAID) configuration, you must configure the RAID volume before you install the Oracle VM Server software. For instructions for configuring RAID, refer to Configuring Storage Drives for Operating System Installation in Oracle Server X6-2 Installation Guide.
Oracle X6 Series Servers Administration Guide at: http://www.oracle.com/goto/x86admindiag/docs