When you start a new Service Event Report, what must be entered first?

A Service Event Report (SER) is used to document installation, maintenance, or corrective actions performed on NetApp systems. Thenode serial numberis the primary identifier used to associate the report with specific hardware.

Other identifiers such as case ID, project number, or sales order number are supplementary and may not always exist at the time the SER is created.

Therefore, the correct answer isC (the node serial number).