Question: How do I lookup the wwn address of my HBA card installed on the Linux system. I need this information to create zoning on my fiber channel switch.
Answer: Use one of the following methods to view the HBA WWN address on Linux.
Method 1: /sys/class/scsi_host/host{n}/device/fc_host:host{n}/port_name File
On Redhat 5 and above (including OEL and CentOS), the /sys/class/scsi_host/host{n}/device/fc_host:host{n}/port_name file contains the HBA WWN information as shown below. Please substitude n with either 0, 1, or 2 according to your system.
For example:
$ cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.3 (Tikanga) $ cat /sys/class/scsi_host/host1/device/fc_host:host1/port_name 0x2100001c111111c1
Method 2: /proc/scsi/{adapter-type}/{n} File
On Redhat 4 and below (including OEL and CentOS), the /proc/scsi/{adapter-type}/{n} file contains the HBA WWN information as shown below.
{adapter-type} can be either qlaxxxx for QLogic adapters (or) lpfc for Emulex adapters.
Please substitude n with either 0, 1, or 2 according to your system.
The example belows shows the WWN number of the qlogic 2300 adapter on RedHat 3.
$ cat /etc/redhat-release
Enterprise Linux Enterprise Linux AS release 3 (Update 9)
$ cat /proc/scsi/qla2300/1
QLogic PCI to Fibre Channel Host Adapter for QLA2460:
Firmware version: 4.00.23, Driver version 7.07.05
Entry address = f888d060
Request Queue = 0x37280000, Response Queue = 0x37270000
Request Queue count= 512, Response Queue count= 512
Total number of active commands = 2
Total number of interrupts = -1635473967
Total number of active IP commands = 0
Total number of IOCBs (used/max) = (0/0)
Total number of queued commands = 2
Device queue depth = 0x20
Number of free request entries = 454
Number of mailbox timeouts = 0
Number of ISP aborts = 0
Number of loop resyncs = 0
Number of retries for empty slots = 0
Number of reqs in pending_q= 0, retry_q= 0, done_q= 0, scsi_retry_q= 0
Host adapter:loop state= , flags= 0x70013
Dpc flags = 0x0
MBX flags = 0x0
SRB Free Count = 4094
Link down Timeout = 045
Port down retry = 045
Login retry count = 045
Commands retried with dropped frame(s) = 0
Configured data rate: 4 Gb/sec
SCSI Device Information:
scsi-qla0-adapter-node=2000002c222c2cc2;
scsi-qla0-adapter-port=2100002c222c2cc2;
scsi-qla0-target-0=5006016022c22c2c;
scsi-qla0-target-1=5006016822c22c2c;
SCSI LUN Information:
(Id:Lun) * - indicates lun is not registered with the OS.
( 0: 0): Total reqs -877237672, Pending reqs 0, flags 0x0, 0:0:81,
( 0: 1): Total reqs 1074740881, Pending reqs 2, flags 0x0, 0:0:81,
( 0: 2): Total reqs 439861869, Pending reqs 0, flags 0x0, 0:0:81,
( 0: 3): Total reqs 417766757, Pending reqs 0, flags 0x0, 0:0:81,
( 1: 0): Total reqs 1174574, Pending reqs 0, flags 0x0, 0:0:82,
( 1: 1): Total reqs 1906876572, Pending reqs 0, flags 0x0, 0:0:82,
( 1: 2): Total reqs 1175529, Pending reqs 0, flags 0x0, 0:0:82,
( 1: 3): Total reqs 1173331, Pending reqs 0, flags 0x0, 0:0:82,
My name is Ramesh Natarajan. I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. My focus is to write articles that will either teach you or help you resolve a problem. Read more about
Comments on this entry are closed.
Personally, I use systool.
The following will give you the verbose output so you can see which HBA is which.
systool -c fc_host -v
Hi,
On a RH 5.x box, command “cat /sys/class/fc_host/hostn/port_name” works better.
Regards,
jms
thank you for this post. I helped greatly.
Personally for me, cat /proc/scsi/lpfc/2 worked. and I have a Emulex HBA.
thank you for the post. it helped me. The second method has scsi heading but FC. You need to issue
cat /sys/class/fc_host/hostN/device/fc_host:hostN/*
this will give you all the FC HBA information.
rpm -q –whatprovides /usr/bin/systool sysfsutils-1.2.0-1
systool -av -c fc_host |grep -i port_name|awk ‘{print $NF}’|awk -F’x’ ‘{print $2}’|sed ‘s/\”//g’|while read a; do echo $a|sed ‘s/../&:/g’;done;
cat /sys/class/scsi_host/host*/device/fc_host/host*/node_name
How can we confirm the HBA’s Emulex or Qlogic on linux host ?