IBM TotalStorage DS4800, User, Installation And Maintenance Manual

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Table 24. DS4800 Symptom-to-FRU index (continued)
Problem
indicator Component Possible cause Possible solutions
Only one Blue
Service Action
Allowed LED is
lit with no other
amber Needs
Attention LEDs lit
Interconnect-
battery
unit
A command from the
DS4800 Subsystem
Management window placed
the interconnect-battery unit
in Identify/Locate mode.
Stop the Identify/Locate action in the DS4800
Subsystem Management window.
Only one Blue
Service Action
Allowed LED is
lit and the amber
Needs Attention
LED for the
same component
is lit
Power
supply-fan,
controller, or
interconnect-
battery
unit
The component indicated by
both the blue (Service Action
Allowed) LED and the
amber (Needs Attention)
LED has failed and can be
replaced.
Unable to access
drives
Expansion drive
channel
Fibre-channel cabling has
failed.
Ensure that the fibre-channel cables are
undamaged and properly connected.
RAID controller has failed. Replace the RAID controller.
An SFP module has failed. Ensure the SFP module is seated properly;
replace the SFP module.
You have connected more
than eight expansion
enclosures to the ports of
the drive channel. Even
though the drive channel is
dual-ported, the DS4800
currently does not support
more than 112 drives per
drive channel.
Power down the DS4800 and its storage
expansion enclosures. Recable the expansion
enclosures with a maximum of eight expansion
enclosures per drive channel.
Chapter 6. Hardware maintenance
165