For more information about installing and powering on a HDD or SSD, refer to Servicing Storage Drives (CRU) in Oracle Server X5-4 Service Manual.
By default, each physical drive on the server is configured as a logical RAID 0 volume. To implement an alternative configuration, refer to the following resources:
Configuring Server Drives for OS Installation in Oracle Server X5-4 Installation Guide
Oracle X5 Series Servers Administration Guide at http://www.oracle.com/goto/x86AdminDiag/docs