There are several ways to get HBA WWNs on VMware vSphere ESX/ESXi host:

1. vSphere Client;
2. Using ESXi Shell;
3. Using Powershell / PowerCLI script.

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1. Connect to a server or vCenter, open server Configuration tab, under Hardware select Storage Adapters:

You can also copy WWNN (World Wide Node Name) and WWPN (World Wide Port Name)

2. How to find HBA WWN via ESXi Shell / CLI:

VMware vSphere ESXi 5.0+:

VMware ESX/ESXi 2.1.0 – 4.1.x:

OR

• Connect to ESXi shell either via putty/SSH or DCUI (Direct Console User Interface) / server console
• Run ‘ls /proc/scsi/‘ and check the folder names:
• Look for a folder like ‘qla2xxx‘ – QLogic HBA, ‘lpfc820‘ – Emulex HBA, ‘bnx2i” – Brocade HBA;
• Run ‘ls /proc/scsi/qla2xxx’. You will get a list of files, named by a number. Each file contains information about one HBA;
• Now run ‘cat /proc/scsi/qla2xxx/6‘ to get full info on the HBA. Alternatively, run the following commands:
  • Run ” cat /proc/scsi/qla2xxx/6 | grep -A3 ‘SCSI Device Information:’ ” to get WWNN and WWPNs:
  • Run ” cat /proc/scsi/qla2xxx/6 | grep ‘Host Device Name’ ” to get vmhba number:

3. Powershell script to list host name, vmhba number, HBA model / driver and World Wide Port Name (WWN):

Inro Elektrotechnik Port Devices Drivers

Result: