Use the Select LUN Mapping screen to configure logical unit number (LUN) mapping for the selected Fibre Channel (FC) host.
During device discovery, a particular partition or tape drive could map to a higher LUN space than is optimal for a particular application. Host mapping enables you to create a virtual private remapping of available LUNs for specific host application. When compared to channel zoning, host mapping is a more precise way to give hosts access to partitions and tape drives.
Note: If both channel zoning and host mapping are enabled, the channel zoning settings supersede any host LUN mapping on the I/O blade. If a device is zoned out, it cannot be mapped.
Note: LUN 0 (zero) is typically assigned to the command and control LUN (CCL), unless it has been manually mapped to another LUN. Make sure at least one device is mapped to LUN 0 (zero).
Note: You cannot map a tape drive to a host if that drive is currently configured as a control path.
Note: Depending on host operating system constraints, it might be necessary to reboot or reconfigure the host because of device map change that result from configuring host mapping.
Do the following:
Note: At any time, select Back to return to the previous screen. Select Cancel to return to the Setup menu.