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Dell Unity storage has a native VASA provider that is used to facilitate communication between the vCenter and ESXi hosts and the Dell Unity system. Some of the responsibilities of the VASA provider include facilitating the offloading of data services, managing VASA sessions, handling client authentication, generating events and alarms, and converting the array data model into the generic VASA data model.
With the release of Dell Unity OE version 4.2, you can select to have the VASA provider automatically registered when you configure VMware access to a vCenter in the Add vCenter wizard. Only Dell Unity administrator credentials are required to add the VASA provider. If you are running an earlier version of code, in order to leverage the on-array VASA provider, you must manually add the Dell Unity system as a VASA vendor provider in vSphere. This establishes the control path between the ESXi host and the Dell Unity system.
As shown in Figure 15, enter the following information on the New Storage Provider page:
When the vendor provider has been registered, ensure that the Status shows Online and Active. After adding the storage provider, you may have to refresh the vSphere Web Client for the system to be displayed. Note that you can only register the VASA vendor provider on a Dell Unity system to a single vCenter. Registering the same VASA vendor provider to another vCenter causes the original provider and its datastores to go offline.