A-Class System Service
A-Class Server Fault Condition Recognition
Chapter 3
63
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:
LAN LED
Heartbeat
LED
Indication
Random
Blink
Pattern
Heartbeat
Blink Pattern
Normal Operation (HP-UX running)
Off Off 2nd Level Cache SIMM fault
On (Steady) Off Memory SIMM fault
On (Steady On (Steady) I/O Subsystem or I/O Board fault
Off On (Steady) System board fault, HPMC or Unknown fault
Blinking On (Steady) I/O HPMC fault
Blinking
opposite of
Heartbeat
LED
Blinking
opposite of
LAN LED
Memory HPMC fault (When LAN is ON,
Heartbeat is OFF. When Heartbeat is ON, LAN
is OFF)
Off Blinking 2nd Level Cache HPMC fault
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