Table 56. Symptom-to-FRU index (continued)
Problem
indicator Component Possible cause Possible solutions
Only one Blue
Service Action
Allowed LED is
lit and the amber
Needs Attention
LED for the
same component
is lit
Power supply
and fan unit,
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. For specific
handling guidelines, see “Handling fibre-optic
cables” on page 48.
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
storage expansion
enclosures to the ports of
the drive channel than
allowed. Even though the
drive channel is dual-ported,
the storage subsystem
currently does not support
more than 112 drives per
drive channel.
Power down the storage subsystem and its
storage expansion enclosures. Recable the
storage expansion enclosures and do not exceed
the maximum number of storage expansion
enclosures allowed per drive channel.
Chapter 6. Hardware maintenance 207
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