If you find yourself having problems registering EMC PowerPath 5.4.1 (unsupported) or 5.4.2 (supported) on your HP blades running ESXi 4.1, consider uninstalling the HP offline bundle hpq-esxi4.luX-bundle-1.0. We did, and PowerPath was magically able to talk to the ELM server and retrieve served licenses. I have no idea why CIM-based tools would have this effect, but there you go. Apparently a fix is on the way from HP, but I haven’t verified that yet. I’ll update as soon as I know more.
Did 5.4.2 SP2 work with the HP bundle 1.0? I’m running the same HP bundle with 5.4.2 SP2 and seems fine.
We weren’t having problems getting PP/VE to run – but we were never able to register the licences or run rpowermt commands against the hosts. Reseller advised us that this was a bug and, given we had a bunch of other stuff to do, we left it at that. If we have time this week I’ll re-test it.