Fabric OS Troubleshooting and Diagnostics Guide v6.4.0 (53-1001769-01, June 2010)

86 Fabric OS Troubleshooting and Diagnostics Guide

53-1001769-01

Power-on self test

To save a set of files that customer support technicians can use to further diagnose the switch

condition, enter the supportSave command. The command prompts for an FTP server, packages

the following files, and sends them to the specified server:

• The output of the supportShow command.

• The contents of any trace dump files on the switch.

• System message (RAS) logs.

See also “Automatic trace dump transfers” on page 103.

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 tests provide 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.

You can use the diagDisablePost command to disable both POST1 and POST2, and you can

reenable it using the diagEnablePost command. See the Fabric OS Command Reference for

additional information about these commands.

The following example shows a typical boot sequence, including POST messages:

The system is coming up, please wait...

Read board ID of 0x80 from addr 0x23

Read extended model ID of 0x16 from addr 0x22

Matched board/model ID to platform index 4

PCI Bus scan at bus 0

:::

Checking system RAM - press any key to stop test

Checking memory address: 00100000

System RAM test using Default POST RAM Test succeeded.

Press escape within 4 seconds to enter boot interface.

Booting "Fabric Operating System" image.

Linux/PPC load:

BootROM command line: quiet

Uncompressing Linux...done.

Now booting the kernel

Attempting to find a root file system on hda2...

modprobe: modprobe: Can't open dependencies file /lib/modules/2.4.19/modules.dep

(No such file or directory)

INIT: version 2.78 booting

INIT: Entering runlevel: 3