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Chapter 12. System maintenance and diagnostics 475
Figure 12-11 AMM BladeCenter LEDs control and status page
Light Path
Light Path diagnostics is a system of LEDs on the control panel and on your
system board (IBM BladeCenter JS43 Express has Light Path LEDs on both
boards). When a hardware error occurs, LEDs are lit throughout the blade server.
LEDs are available for many components, such as:
򐂰 Battery.
򐂰 SAS HDD (or SSD) disks, on both Base and MPE planars.
򐂰 Management card on Base planar only.
򐂰 Memory modules on both Base and MPE planars.
򐂰 Expansion cards (1Xe and HSDC daughter cards) on both Base and MPE
planars.
The MPE planar has a special LED to help on determining the correct planar
where the error is happening. This LED is called “
Check card below”, and is used
to indicate that the problem is not occurring in the MPE planar, but in the Base
planar. This LED is also called “
Not me” LED.
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