Redundant array of independent disks (RAID) implementations provide increased performance and data integrity across the available disk space in the server. By mirroring data across drives, most RAID levels can tolerate disk failures. Additionally, some RAID configurations enable you to designate one or more hot spares. A hot spare is an unused drive on which the data on a failed drive can be automatically duplicated.
Before you create RAID volumes on the server, decide what RAID level is appropriate for your environment. To review the RAID levels supported by the Oracle Storage 12 Gb/s SAS PCIe RAID Host Bus Adapter (HBA), refer to one of the following resources:
LSI MegaRAID SAS Software User Guide at https://www.broadcom.com/support/oem/oracle/
Oracle Storage 12 Gb/s SAS PCIe RAID HBA, Internal Installation Guide at http://www.oracle.com/technetwork/documentation/oracle-storage-networking-190061.html
Once you have decided on a RAID level, review the RAID configuration requirements in your server installation guide, and the following sections: