**Update May 07, 2012 – Use the new script here: Updated: Finding WWNs for HBAs in ESXi hosts, now with Get-VMHostHba
When building a new cluster, your storage team (or you) may need to add several hosts into the shared storage zone. It’s a pain to go to each host, configuration, storage adapters, then copy out the WWN.
With this script, you can supply a vCenter server and Cluster/Folder/Datacenter (any logical container) and it will list all the WWNs for Fibre Channel devices. But what if you don’t have vCenter stood up yet? No problem, you can also supply a list of ESX/ESXi hosts to scan.
Shawn & I built this because we have 20 hosts we need the WWNs from to provide to our storage team, and vCenter isn’t alive yet.