IBM Type 8677, Type 1881 manual Setting up the BladeCenter unit, System LED panel

System LED panel

The following illustration shows the status LEDs on the system LED panels on the front and rear of the BladeCenter unit.

Location Information

Power-on Over-temperature System error

Attention: If the power-on LED is off, it does not mean there is no electrical current present in the BladeCenter unit. The LED might be burned out. To remove all electrical current from the BladeCenter unit, you must unplug all power cords from all power modules.

Note: You can turn off the location LED and the information LED through the Web interface or the IBM Director console.

Power-on:When this green LED is lit, power is present in the BladeCenter unit. When this LED is off, the power subsystem, the ac power, or the LED has failed, or the management module is not present or not functioning.

Location: When this blue LED is lit or flashing, it has been turned on by the system administrator to aid in visually locating the BladeCenter unit. If a blade server requires attention, the location LED on the blade server usually will also be lit. After the BladeCenter unit has been located, you can have the system administrator turn off the location LED.

Over-temperature:When this amber LED is lit, the temperature in the BladeCenter unit exceeds the temperature limits, or a blade server has reported an over-temperature condition. The BladeCenter unit might have already taken corrective action, such as increasing the blower speed. This LED turns off automatically when there is no longer an over-temperature condition.

Information: When this amber LED is lit, a noncritical event has occurred that requires attention, such as the wrong I/O module inserted in a bay or power demands that exceed the capacity of power modules currently installed. The event is recorded in the event log. Check the LEDs on the BladeCenter unit and the blade servers to isolate the component. After the situation is handled, have the system administrator turn off the information LED.

Note: The information LED will also light if the system error log is 75% full.

System-error:When this amber LED is lit, it indicates that a system error has occurred, such as a failed module or a system error in a blade server. An LED on one of the components or on a blade server is also lit to further isolate the error. (For more information, see “Identifying problems using the Light Path Diagnostics feature” on page 29.)

Setting up the BladeCenter unit

This section briefly discusses considerations for the setup of your BladeCenter unit.

vBlade bays must be occupied at all times.

To help ensure proper cooling, performance, and system reliability, make sure that each of the blade bays on the front of the BladeCenter unit has a blade server, expansion unit, or filler blade installed.

Important: When replacing a blade server or installing an expansion option, do not operate the BladeCenter unit for more than one minute without either a blade server, an expansion option, or a filler blade installed in each blade bay.

Chapter 1. General information 17