Maybe you are new in a professional environment where you have to become familiar with new terms like HBA cards and storage via Fiber or others
A host bus adapter (HBA) is a circuit board and/or integrated circuit adapter that provides input/output (I/O) processing and physical connectivity between a host system, or server, and a storage and/or network device
How to find HBA cards/ports and WWN in Linux Redhat/Centos ?
Method 1
To find the HBA cards installed on your system use :
[root@su444p043 ~]# lspci -nn | grep -i qlog 08:00.0 Fibre Channel [0c04]: QLogic Corp. ISP8324-based 16Gb Fibre Channel to PCI Express Adapter [1077:2031] (rev 02) 08:00.1 Fibre Channel [0c04]: QLogic Corp. ISP8324-based 16Gb Fibre Channel to PCI Express Adapter [1077:2031] (rev 02) [root@su444p043 ~]#
To check the available HBA ports :
# ls -l  /sys/class/fc_host/ total 0 lrwxrwxrwx 1 root root 0 Apr 20 11:21 host7 -> ../../devices/pci0000:00/0000:00:03.0/0000:08:00.0/host7/fc_host/host7 lrwxrwxrwx 1 root root 0 Apr 20 11:21 host8 -> ../../devices/pci0000:00/0000:00:03.0/0000:08:00.1/host8/fc_host/host8
To find the state of HBA ports (online/offline) :
]# more /sys/class/fc_host/host?/port_state :::::::::::::: /sys/class/fc_host/host7/port_state :::::::::::::: Online :::::::::::::: /sys/class/fc_host/host8/port_state :::::::::::::: Online
To find the WWN numbers of the above ports :
# more /sys/class/fc_host/host?/port_state :::::::::::::: /sys/class/fc_host/host7/port_name :::::::::::::: 0x51402ec000f497a0 :::::::::::::: /sys/class/fc_host/host8/port_name :::::::::::::: 0x51402ec000f497a2
Method 2 : Using systool
Another useful command to find the information about HBAs is systool. If not already installed please do it with the following command.
# yum install sysfsutils -y
To check the available HBA ports :
[root@------ ~]# systool -c fc_host Class = "fc_host" Class Device = "host7" Device = "host7" Class Device = "host8" Device = "host8"
To find the WWNs for the HBA ports :
# systool -c fc_host -v | grep port_name port_name = "0x51402ec000f497a0" port_name = "0x51402ec000f497a2"
To check the state of the HBA ports (online/offline) :
# # systool -c fc_host -v | grep port_state port_state = "Online" port_state = "Online"
Please Enjoy and share !!
