Working with diagnostic features, Viewing power-on self test, 12 working with diagnostic features – HP Brocade 4Gb SAN Switch for HP BladeSystem p-Class User Manual
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Fabric OS 5.0.0 procedures user guide 165
12 Working with diagnostic features
This chapter contains the following sections:
• Viewing the system message log
• Viewing and saving diagnostic information
• Setting up automatic trace dump transfers
This chapter provides information on diagnostics and how to display system, port, and specific hardware
information. It also describes how to set up system logging mapping (
syslogd
) and how to set up the
offloading of error messages (
supportsave
).
The purpose of the diagnostic subsystem is to evaluate the integrity of the system hardware.
Diagnostics are invoked two ways:
•
Automatically during the power-on self test (POST)
•
Manually using Fabric OS CLI commands
The error messages generated during these test activities are sent to the serial console and system
message logs, whose output formats may differ slightly.
Use the
diaghelp
command to receive a list of all available diagnostic commands.
Refer to the HP StorageWorks Fabric OS 4.x command reference guide for a complete description of
each command.
Viewing power-on self test
By default, when you power on the system, the boot loader automatically performs power-on self tests
and loads a Fabric OS kernel image.
The POST provides a quick indication of hardware readiness when hardware is powered up. These tests
do not require user input to function. They typically operate within several minutes, and support minimal
validation because of the restriction on test duration. Their purpose is to give a basic health check before
a new switch joins a fabric.
These tests are divided into two groups: POST1 and POST2. POST1 validates the hardware interconnect
of the device, and POST2 validates the ability of the device to pass data frames between the ports. The
specific set of diagnostic and test commands run during POST depends on the switch model.