For more information about installing and powering on a HDD or SSD, refer to Servicing Storage Drives (CRU) in Oracle Server X5-2 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:
RAID Configuration Requirements in Oracle Server X5-2 Installation Guide
Oracle X5 Series Servers Administration Guide at http://www.oracle.com/goto/x86AdminDiag/docs