Post about the Equallogic MEM plugin for vsphere 5.0

http://blogs.vmware.com/vsphere/2011/11/dells-multipath-extension-module-for-equallogic-now-supports-vsphere-50.html

I spoke with Andrew McDaniel, one of DELL's Lead Architects for VMware based in Ireland, and he was able to supply me with some additional information about this MEM. Firstly, since the MEM is essentially a PSP, devices from the EqualLogic array continue to use the Native Multipath Plugin (NMP) from VMware. This handles basic tasks like loading and unloading of MEMs, path discovery and removal, device bandwidth sharing between VMs, etc.