How to identify the HBA cards/ports and WWN in Linux

There are several commands to determine the WWN of a Fibre Channel (FC) HBA and their status (online/offline). The post discusses few of the most commonly used methods.

Method 1
To find the HBA cards installed on your system use :

# lspci -nn | grep -i hba
07:00.0 Fibre Channel [0c04]: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA [1077:2532] (rev 02)
07:00.1 Fibre Channel [0c04]: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA [1077:2532] (rev 02)

To check the available HBA ports :

# ls -l /sys/class/fc_host
total 0
drwxr-xr-x 3 root root 0 Feb  3  2015 host2
drwxr-xr-x 3 root root 0 Feb  3  2015 host3

To find the state of HBA ports (online/offline) :

# more /sys/class/fc_host/host?/port_state
::::::::::::::
/sys/class/fc_host/host2/port_state
::::::::::::::
Online
::::::::::::::
/sys/class/fc_host/host3/port_state
::::::::::::::
Online

To find the WWN numbers of the above ports :

# more /sys/class/fc_host/host?/port_name
::::::::::::::
/sys/class/fc_host/host2/port_name
::::::::::::::
0x500143802426baf4
::::::::::::::
/sys/class/fc_host/host3/port_name
::::::::::::::
0x500143802426baf6

Method 2 : Using systool
Another useful command to find the information about HBAs is systool. If not already install, you may need to install the sysfsutils package.

# yum install sysfsutils

To check the available HBA ports :

# systool -c fc_host
Class = "fc_host"

  Class Device = "host2"
    Device = "host2"

  Class Device = "host3"
    Device = "host3"

To find the WWNs for the HBA ports :

# systool -c fc_host -v | grep port_name
    port_name           = "0x500143802426baf4"
    port_name           = "0x500143802426baf6"

To check the state of the HBA ports (online/offline) :

# systool -c fc_host -v | grep port_state
    port_state          = "Online"
    port_state          = "Online"

Alıntıdır..!