Correct, as the OP of that thread I found my issue was related to the SAN configuration. The HBA configuration mapping was incorrect in my case so I had to modify the host group settings on the SAN configuration so that the ESX servers were in the same host group.
When the SAN config is done, you rescan the Storage Adapters and the extra LUN (or LUNs) should be visible. You can setup the ESX partition on the LUN from the 1st ESX server (format it to VMFS), then when you rescan on the remaining ESX servers, the LUN should be visible in it's VMFS form.
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