Situation:I was tasked with upgrading a ESX 3.5 cluster to ESXi 4.1. Since we were switching from ESX to ESXi this requires a clean install. No upgrades are possible. Client had already built a new vCenter 4.1 server. They use an HP EVA 6100 for storage. FC connectivity, with active/active controllers. I tend to prefer Round Robin multipathing for vSphere installs (if supported by the array) so I tasked myself with figuring out the best settings for vSphere and the HP EVA.
- With ESX 3.x, HP seems to recommend Fixed multipathing
- With ESX 4.x, HP seems to recommend MRU or RR multipathing. RR is probably the better option.
- The EVA 6100 I’m working with shows a Fixed config for ESX 3.5 hosts when I analyzed the 3.5 hosts. When the same host is updated to ESX 4.1, the config changes to ALUA and MRU. I then ran the following command to automatically update all datastores from MRU to RR-
More Info: Here’s a couple of posts that I found that were helpful in determining what settings to apply for HP EVA hosts. I don’t typically work with EVA’s too much so they were helpful. Wonder what will happen to the EVA line now that HP has purchased 3Par.