User Guide

Chapter 5 System Monitoring64
The table below shows the meaning of each of the LEDs, and how to
interpret them.
Note: If enabled, the audible alarm will sound when an error is
detected.
Caution: If 1GB and 2Gb hardware is mixed in an enclosure at
power up, and the enclosure is set to 2Gb, the drives will not spin
up and LEDs 1 and 5 will be flashing.
Description Color Indication
LED 0 Power On Green Normally ON, indicates power is applied.
OFF indicates no power.
LED 1 Shelf Fault Amber Normally OFF indicates no faults exist in
the enclosure. ON indicates a fault.
Flashing of this LED indicates the both a
1GB and a 2Gb I/O module has been
detected.
LED 2 FC Loop A Green ON indicates FC Loop A closed. OFF
indicates FC Loop A open
LED 3 FC Loop B Green ON indicates FC Loop B closed. OFF
indicates FC Loop B open.
LED 4 LS Fault Amber Normally OFF indicating that the LS
Module has no fault. ON indicates an LS
Module fault. Flashing of this LED
indicates that the LS is a 1GB LS module in
a 2Gb system.
LED 5 2Gb Operation Green ON indicates the FC loop is operating at
2Gb/Sec speed. OFF indicates the FC Loop
is operating at 1GB/Sec Speed. Flashing
of this LED indicates that the LS module is
set to an incorrect speed.