To use an HP StorageWorks EVA system with ESXi, you must configure the correct host mode type.
Set the connection type to Custom when you present a LUN to the host. The value is one of the following:
For EVA4000/6000/8000 active-active arrays with firmware below 5.031, use the host mode type
For EVA4000/6000/8000 active-active arrays with firmware 5.031 and above, use the host mode type
Otherwise, EVA systems do not require special configuration changes to work with an ESXi system.
See the VMware Infrastructure, HP StorageWorks Best Practices at the HP Web site.