HP Z800 Hardware Setup Manual page 35

The fibre channel adapter is equipped with four ports, called loops. You can connect your storage enclosure
to the fibre channel cards using either 2 loops or 4 loops. A 2-loop device can be connected to either the
inner pair of ports or the outer pair of ports. A 4-loop device requires both the inner pair and the outer pair.
NOTE If you are not using all the ports of a fibre channel adapter, terminate the two unused ports with the FC
loopback couplers that shipped with your system. Terminating these ports significantly decreases the time required
to boot the system.
FC port 1
}
To storage assembly
FC port 2
FC port 3 (Optional) To storage (4 loop),
}
FC port 0 archiving device or SAN
Connecting the HP Z800 ATTO Fibre Channel Adapter | 31