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The FC protocol

The FC protocol requires one or more supported host bus adapters (HBAs) in the host. Each HBA port is an initiator that uses FC to access the LUNs on the storage system. The HBA port is identified by a worldwide port name (WWPN).

You need to make a note of the WWPN so that you can supply it when you create an initiator group (igroup). To enable the host to access the LUNs on the storage system using the FC protocol, you must create an igroup on the storage system and provide the WWPN as an identifier. Then, when you create the LUN, you map it to that igroup. This mapping enables the host to access that specific LUN.

The Linux Host Utilities support the FC protocol with fabric-attached SAN and direct-attached configurations: