We've been asking EMC for a best practices document for using VNX storage arrays with VMware vSphere and they've finally released one. It's available on Powerlink <a href="http://powerlink.emc.com/km/live1/en_US/Offering_Technical/White_Paper/h8229-vnx-vmware-tb.pdf">here</a>. A Powerlink logon ID is required to access the document.