IBM TotalStorage EXP100, Installation, User'S, And Maintenance Manual

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Table 16. Symptom-to-FRU index
Problem
indicator Component Possible cause Possible solutions
Amber LED is lit Drive CRU Drive failure Replace the failed drive.
Fan CRU Fan failure Replace the failed fan.
ESM
over-
temperature
LED
Subsystem has
overheated
Check fans for faults. Replace
the failed fan if necessary.
Environment is too
hot
Check the ambient temperature
around the expansion enclosure.
Cool as necessary.
Defective LED or
hardware failure
If you cannot detect a fan failure
or overheating problem, replace
the ESM.
ESM Fault LED ESM failure Replace the ESM. See your
controller documentation for more
information.
ESM Bypass
LED
No incoming signal
detected
Reconnect the SFP modules and
the Fibre Channel cables.
Replace input and output SFP
modules or cables as necessary.
ESM failure If the ESM Fault LED is lit, also
replace the ESM.
Front panel General machine
fault
A Fault LED is lit somewhere on
the expansion enclosure (check
for Amber LEDs on CRUs).
Fibre Channel
connection failure
Check that the CRUs are
properly installed. If none of the
amber LEDs are lit on any of the
CRUs, this indicates an SFP
module transmission fault in the
expansion enclosure. Replace
the failed SFP module. See your
storage manager software
documentation for more
information.
ESM ID conflict This expansion
enclosure has the
same ID as one of
the other expansion
enclosures or
storage subsystems
in the drive loops.
Change the enclosure ID
switches to set a unique ID for
this expansion enclosure.
Amber LED is lit
and green LED is
off
Power supply
CRU
The power switch is
turned off or there is
an ac power failure.
Replace the failed power supply
or turn on all power supply
switches.
Amber and green
LEDs are lit
Power supply
CRU
Power supply failure Replace the failed power supply.
All amber and
green LEDs are
off
All drive CRUs Check for and resolve one of the following situations:
v
EXP100 is turned off
v
EXP100 is not connected to the DS4000
v
DS4000 does not have the correct firmware version
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IBM TotalStorage DS4000 EXP100 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide