When a node is unresponsive via its standard management interfaces, the Service Processor (SP) provides out-of-band access for diagnostics. The system log command, available at the SP prompt, displays the buffered system console log. This log is critical for initial root cause analysis as it contains the last messages generated by the system before the failure, including kernel panic information and hardware error messages. The system core command is used to manage and trigger a core dump, which is a snapshot of the system's memory at the time of the crash. This core dump is essential for a detailed engineering-level analysis of the failure.

A. sp status –d: This is an ONTAP command-line interface (CLI) command, not a Service Processor command. It cannot be executed when the node's ONTAP software is unresponsive.

B. event log show: This is an ONTAP CLI command used to view the Event Management System (EMS) logs. It is unavailable from the SP prompt when the node has failed.

1. NetApp ONTAP Documentation, "System-level diagnostics from the SP or BMC": This section details the use of the Service Processor for troubleshooting. It lists system log as the command to "Display the system console log" and system core to "Save a system core dump for analysis". These are presented as primary tools for diagnosing an unresponsive node. (Found in various hardware-specific Installation and Setup Guides, for example, the AFF A400 and FAS8300/FAS8700 Installation and Setup Instructions, Section: "SP/BMC commands quick reference").

2. NetApp ONTAP 9.10.1 Commands: Manual Page Reference: This official command reference guide documents event log show and sp status as commands that are executed from the ONTAP clustershell or nodeshell prompt. This confirms they are not SP commands and would be unavailable in the described scenario. (See manual pages for event log show and sp status).