Recommend installing VSI-Storage Viewer on the machine where you have vSphere client.
You will be able to get device details from the devices provisioned from EMC array to ESXi host.
Also if i remember well starting with SE 7.2, it is possible to performs inquiries into a vSphere environment using SYMCLI commands to identify and resolve storage configuration. The SYMVM command can add devices to virtual machines and display storage configuration info.
A short list of functionality available when using symvm is as follows:
Adding available symmetrix devices as raw device mappings to virtual machines
List available candidate devies for RDMs
List a virtual machine's RDMs
List operating systems of virtual machines
List datastores on a given ESX host
Provide details of a given datastore
List details of a given virtual machine
It is very helpful command regarding the ESX hosts