Fiber Channel


Find the fiber channel hosts

# ls /sys/class/fc_host
# systool -c fc_host -v

Find the name of the card

# more /sys/class/fc_host/host12/symbolic_name

Find the WWNN of a fiber host

# more /sys/class/fc_host/host12/node_name

Find the WWPN of a fiber host

# more /sys/class/fc_host/host12/port_name

Reset the HBA

echo 1 > /sys/class/fc_host/host8/issue_lip


# more /sys/class/fc_host/host12/fabric_name
# more /sys/class/fc_host/host12/port_id



Fibre Channel (FC) Host Bus Adapters(HBA) are interface cards that connects the host system to a fibre channel network or devices.


A World Wide Name (WWN) or World Wide Identifier (WWID) is a unique identifier used in storage technologies including Fibre Channel, Parallel ATA, Serial ATA, NVM Express, SCSI and Serial Attached SCSI (SAS).

A World Wide Node Name, WWNN, or WWnN, is a World Wide Name assigned to a node (an endpoint, a device) in a Fibre Channel fabric. It is valid for the same WWNN to be seen on many different ports (different addresses) on the network, identifying the ports as multiple network interfaces of a single network node. A WWNN can have multiple WWPNs.

World Wide Port Name, WWPN, or WWpN, is a World Wide Name assigned to a port in a Fibre Channel fabric. Used on storage area networks, it performs a function equivalent to the MAC address in Ethernet protocol, as it is supposed to be a unique identifier in the network.