Please see the following Solution articles on PowerLink:  VMware ESX  emc241869  “Where do I find information about using the Navisphere Host Agent for  VMware” emc259971 "Cannot  claim VMware NMP devices after installing PowerPath on ESX hosts." emc262738  "Why is the failover mode on the array changing for 4 (ALUA) to 1 after an  Storage Processor reboot or an NDU?"  ESX 4.x does not use the EMC Navipshere/Unisphere Agent - you must uninstall the EMC Agent for all ESX 4.x. VMware includes their own Agent with ESX now and the two do not co-exist.  Also, you should find the latest Host Connectivity Guide for ESX:  Home > Support > Technical Documentation and Advisories > Host Connectivity/HBAs > Installation/Configuration > EMC Host Connectivity Guide for VMWare ESX Server  glen
Hello experts,  as part of the process of keeping up to date our VMware vSphere 4 production infrastructure and as part of the process of switching from ESX to ESXi as recommended by VMware we are now planning to switch from current VMware ESX 4.0.0 Build 171294 to the latest version/Build of ESXi.Before going through the entire procedure we are looking for instructions on how to register the new ESXi 4.1 installation on the Clariion after upgrading the hosts to ESXi 4.1 (more specifically after Step 7 and before Step 8 outlined below).  When we initially built the hosts using current VMware ESX 4.0.0 Build 171294 we installed Navisphere host agent on the ESX Service Console and automatically got the hosts registered on the Clariion.  Since VMware ESXi does not have a service console should I manually unregister the old VMware ESX 4.0 hosts after Step 5 using Navisphere Express and manually add them back using Navisphere Express after completing the ESXi 4.1 installation ?  Our migration plan from ESX to ESXi is described below:  ==================================================1) Upgrade VMware vCenter Server to the latest build currently available2) Migrate all VMs from Host A to Host B3) Remove Host A from the cluster4) Detach Host A from VMware vCenter Server and release this host's licenses5 ) Shutdown Host A and unplug SAN connections to prevent accidental overwrites during ESXi 4.1 installation6) Perform any hardware firmware updates from IBM to the host7) Build the ESXi 4.1 host from scratch8) Reconfigure host networking, reconnect storage, add back the host's licenses and add back the host to the cluster9) Test extensively and finally move all VMs back to the ESXi 4.1 host and repeat with the remaining ESX 4.0 host starting from Step 3)==================================================  Thank you in advance for your support.  Regards, Massimiliano
How can I register a VMware ESXi 4.1 host on a CLARiiON AX4-5F system ?