5.3. s390x Architectures

On Red Hat Enterprise Linux 4.8, N_Port ID Virtualization (NPIV) for System z guests using zFCP is now enabled. NPIV allows a Fibre Channel HBA to log in multiple times to a Fibre Channel fabric using a single physical port (N_Port). With this functionality, a Storage Area Network (SAN) administrator can assign one or more logical unit numbers (LUNs) to a particular System z guest, making that LUN inaccessible to others. For further information, see "Introducing N_Port Identifier Virtualization for IBM System z9, REDP-4125" available at http://www.redbooks.ibm.com/abstracts/redp4125.html