About FC Host Mapping

When I/O blades are installed in the library, you can configure the host mapping feature to map specific hosts to library device logical unit numbers (LUNs).

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 Fibre Channel (FC) hosts. When compared to channel zoning, host mapping is a more precise way to give hosts access to partitions and tape drives.

Host mapping is an optional feature and is disabled by default. For instructions on how to enable or disable host mapping, see Enabling/Disabling FC Host Mapping.

You can configure host access using the host management and host mapping web client screens for all I/O blades found in the library. For more information about host management and configuring host mapping, see About FC Host Management and Configuring FC Host Mapping.

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.

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