IBM totalstorage 326, User Reference

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Table 22. Storage unit troubleshooting table
Problem Indicator Component Possible Cause Possible Solutions
Amber LED on Drive CRU Drive failure Replace failed drive.
Fan CRU Fan failure Replace failed fan.
ESM board
Over-temperature
LED Subsystem is
overheated Check fans for faults.
Replace failed fan if
necessary.
Environment too
hot Check the ambient
temperature around the
expansion unit. Cool as
necessary.
Defective LED or
hardware failure If you cannot detect a fan
failure or overheating
problem, replace the ESM
board.
ESM board Fault
LED ESM board failure Replace ESM board. Refer
to your controller
documentation for details.
ESM board
Bypass LED GBIC port empty No corrective action needed
if system is properly
configured.
ESM board failure If the ESM board Fault LED
is lit, replace the ESM
board.
No incoming
signal detected
1. Reattach the GBIC and
Fibre Channel (FC)
cables.
2. Replace input and
output GBIC or cables
as necessary.
Front panel General machine
fault Indicates that a Fault LED
somewhere on the
expansion unit has been
turned on. (Check for amber
LEDs on CRUs).
GBIC transmit
fault
1. Check that the CRUs
are plugged in properly.
If no amber LEDs are lit
on the CRUs, this
indicates a GBIC
transmission fault in the
expansion unit.
2. Have the failed GBIC
replaced (service
technician only).
Amber LED on and
green LED off Power supply
CRU Power switch is
turned off or AC
power failure Turn on all power supply
power switches.
Amber and green
LEDs on Power supply
CRU Power supply
failure Replace failed power supply
CRU.
Chapter 8. Troubleshooting
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