You must meet certain requirements when configuring storage arrays to work with ONTAP systems. These requirements include setting configuration parameters on storage arrays and deploying only supported configurations.
Preparing HP EVA storage arrays for NDU
HP EVA storage arrays have a tendency to bring target ports offline during a firmware upgrade. ONTAP provides commands that increase ONTAP resiliency so that the ONTAP system is not disrupted if target ports go offline during the firmware upgrade. These commands can be used only with storage systems running ONTAP.
HP EVA storage array families ONTAP does not support mixing some types of storage in aggregates. To help you determine the array LUNs that can be mixed in an aggregate, the storage arrays from each vendor are grouped into families. When you create aggregates, you cannot mix array LUNs from different vendors and from different storage array families in the same aggregate.