Download ftServer T30 Technical Service Guide

2.3 Hardware Component Status LEDs
Hardware-based troubleshooting is implemented through light-emitting diodes (LEDs) that
signal the status of various components. LEDs are located on the front of the CPU enclosures
and DC/AC inverters, and on the front and rear of the core I/O enclosures.
During the boot process, the Baseboard Management Controller (BMC) verifies that components of
CPU and I/O enclosures, such as clock cards, are present and performing normally before it turns
that enclosure on. If a component has failed, the BMC removes power from that enclosure. As a
result, the LEDs on an enclosure may be lit briefly and then turn off, or the LEDs may not be lit
at all, indicating a failed component of the enclosure.
This section provides general information and guidelines for interpreting hardware omponent
status LEDs in the ftServer system. For more information about monitoring and troubleshooting
the system, refer to the Stratus ft Linux System Administrator's Guide (R003L).
2.3.1 CPU Enclosure LEDs
Each CPU enclosure has two LEDs, a red and a green-amber. They are located at the front of the
enclosure.
The following table describes the meaning of the status LEDs when lit and shows what action, if
any, should be taken.
LED
Meaning
Action
Red
The CPU enclosure is broken.
Replace CPU enclosure.
Amber
The CPU enclosure is operating simplexed.
Taking it offline will crash the system.
Return the offline CPU enclosure to service.
Red and
Green
CPU enclosure is testing.
Wait.
Green
CPU enclosure is operating duplexed.
None.
No standby power present.
Check that the enclosure is inserted
correctly. Verify that the power cords are
connected or take other measures to supply
power to the system.
Clear (unlit)
2.3.2 Core I/O Enclosure LEDs
The LEDs on the core I/O enclosure are located on the front and rear of the enclosure.They
consist of the following:
1.
2.
3.
4.
5.
6.
7.
Baseboard Management Controller (BMC) status
Core I/O enclosure status
Disk activity/fault
Disk power, read/write
System power button and LED
Core I/O enclosure status
PCI adapter slot status
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