Apple Xserve Guide de l'utilisateur télécharger pdf (Page 80)

Xserve G5 Troubleshooting -

General Information

Entering Firmware Boot Commands From the Front Panel

You can use the system identiﬁer button on the Xserve G5 server’s front panel to initiate a

limited number of ﬁrmware commands to the system without connecting a keyboard or

monitor to the server. The commands are listed below; you enter each command with a

combination of the system ID button and a speciﬁc light on the front panel.

Note:

If Open Firmware Security is turned on for the system, front panel mode is not

available. In this situation, the two rows of lights on the front panel ﬂash twice when you try

to enter a boot command with the system identiﬁer. Then the system resumes its regular

startup sequence.

Follow these steps to initiate a command from the front panel.

1. With the power off, hold in the system ID button while you press the on button.

2. Continue holding in the system ID button until the top row of blue lights blinks

sequentially.

3. Release the system ID button. The rightmost light in the bottom row turns on. Press

the button to light the next light in the bottom row, moving from right to left. Press the

button again to change lights.

The lights in the bottom row indicate (from right to left):

• Light 1 (far right): Start up from the system disc (also ejects any disc in the optical

drive)

• Light 2: Start up from a network server (NetBoot)

• Light 3: Start up from the internal drive (leftmost drive if more than one)

• Light 4: Bypass the current startup disk and start up from any other available startup

disk

• Light 5: Begin target disk mode (all drives, including the optical drive, will show up)

• Light 6: Restore the system’s default settings (reset NVRAM)

• Light 7: Enter Open Firmware (via the serial port if no monitor/keyboard connected)

• Light 8: Enter diagnostic test mode

4. When the light for the action you want is on, hold in the system identiﬁer button for at

least 2 seconds, until all lights in the top row are on.

5. Release the button.

Diagnostic Tools

Xserve G5 includes built-in sensors that report on hard drives, internal temperature, fan

status/failure, and power status/failure. These sensors allow you to monitor the server’s

operation via indicator lights on the front of the server and remote monitoring software.

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Apple Xserve Guide de l'utilisateur Page 80