Node error code overview

Node error codes describe failures that relate to a specific node. Node rescue codes are displayed on the front panel display during node rescue. A 2145-DH8 node does not have a front panel display and does not have node rescue codes.

Use the service assistant GUI by the Technician port to view node errors on a node that does not have a front panel display such as a 2145-DH8 node.

Because node errors are specific to a node, for example, memory failures, the errors might be reported only on that node. However, if the node can communicate with the configuration node, then it is reported in the system event log.

When the node error code indicates that a critical error was detected that prevents the node from becoming a member of a clustered system, the Node fault LED is on for the 2145-DH8 node, or Line 1 of the front panel display contains the message Node Error.

Line 2 contains either the error code or the error code and additional data. In errors that involve a node with more than one power supply, the error code is followed by two numbers. The first number indicates the power supply that has a problem (either a 1 or a 2). The second number indicates the problem that is detected.

Figure 1 provides an example of a node error code. This data might exceed the maximum width of the menu screen. You can press the Right navigation to scroll the display.

Figure 1. Example of a displayed node error code

This figure shows an example of a displayed node error code

The additional data is unique for any error code. It provides the necessary information to isolate the problem in an offline environment. Examples of additional data are disk serial numbers and field replaceable unit (FRU) location codes. When these codes are displayed, you can do additional fault isolation by browsing the default menu to determine the node and Fibre Channel port status.

There are two types of node errors: critical node errors and noncritical node errors.

Critical errors

A critical error means that the node is not able to participate in a clustered system until the issue that is preventing it from joining a clustered system is resolved. This error occurs because part of the hardware failed or the system detects that the software is corrupted. If a node has a critical node error, it is in service state, and the fault LED on the node is on. The exception is when the node cannot connect to enough resources to form a clustered system. It shows a critical node error but is in the starting state. Resolve the errors in priority order. The range of errors that are reserved for critical errors are 500 - 699.

Noncritical errors

A noncritical error code is logged when a hardware or code failure that is related to just one specific node. These errors do not stop the node from entering active state and joining a clustered system. If the node is part of a clustered system, an alert describes the error condition. The range of errors that are reserved for noncritical errors are 800 - 899.

Node rescue codes

To start node rescue, press and hold the left and right buttons on the front panel during a power-on cycle. The menu screen displays the Node rescue request. See the node rescue request topic. The hard disk is formatted and, if the format completes without error, the software image is downloaded from any available node. During node recovery, Line 1 of the menu screen displays the message Booting followed by one of the node rescue codes. Line 2 of the menu screen displays a boot progress indicator. Figure 2 shows an example of a displayed node rescue code.

Figure 2. Example of a node-rescue error code

This figure shows how the node rescue error code is displayed on the front panel

The three-digit code that is shown in Figure 2 represents a node rescue code.

Note: The 2145 UPS-1U does not power off following a node rescue failure.