SAS provides a direct method of accessing external storage devices. A PDomain can access an external SAS storage device after installing a SAS HBA into a PDomain PCIe slot, and then cabling the SAS HBA to the storage device using the device-appropriate SAS cables. Refer to the SAS HBA and SAS storage device documentation for selecting the correct SAS cables and for instructions on cabling the HBA to the storage device.
Each server PDomain must be configured to boot off of a storage device. During the server installation, configure the PDomain to boot off a SAS target (for example, a drive or a partition) in the external storage device. Once configured, you can install the Oracle Solaris OS on the device. Refer the SAS HBA and storage device documentation for instructions specific to your devices.
Managing SAN Devices and Multipathing in Oracle Solaris in the Oracle Solaris Documentation (http://www.oracle.com/goto/solaris11/docs)