A-Class Server Fault Condition Recognition
Overview
The existence of fault conditions are determined by reviewing Front Panel LED Status
codes (shown below), or reviewing Review Console Messages.
The following subsections describe fault condition review procedures.
Review Front Panel Status LEDs
Front panel LEDs display either normal operation or fault status of the A-Class server.
Fault conditions consist of selftest failures and High Priority Machine Check (HPMC)
fault conditions. The following table describes what the front panel LED blink patterns
indicate:
Chapter 3
Heartbeat
LAN LED
LED
Random
Heartbeat
Blink
Blink Pattern
Pattern
Off
Off
On (Steady)
Off
On (Steady
On (Steady)
Off
On (Steady)
Blinking
On (Steady)
Blinking
Blinking
opposite of
opposite of
Heartbeat
LAN LED
LED
Off
Blinking
A-Class Server Fault Condition Recognition
Indication
Normal Operation (HP-UX running)
2nd Level Cache SIMM fault
Memory SIMM fault
I/O Subsystem or I/O Board fault
System board fault, HPMC or Unknown fault
I/O HPMC fault
Memory HPMC fault (When LAN is ON,
Heartbeat is OFF. When Heartbeat is ON, LAN
is OFF)
2nd Level Cache HPMC fault
A-Class System Service
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