IBM DS4000 EXP810, Installation, User'S, And Maintenance Manual

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Table 38. Symptom-to-FRU index (continued)
Problem
indicator Component Possible cause Possible solutions
Amber and green
LEDs are lit Power supply
CRU
(Fault and
Power LEDs lit;
Power supply failure Replace the failed power supply.
Operating
environment is too
hot Cool down the environment.
SAA lit; Direct
Current Enable
LED is not lit)
Fan failure Replace the power supply and
fan unit CRU.
Drive CRUs Drive not certified Verify that the drive option or
FRU/CRU P/N is listed in the
support list for the appropriate
DS4000 storage subsystems.
Note: In certain cases, only the
amber LED is lit, and the green
activity LED is not lit. Use the
Recovery Guru to better identify
the cause of the drive failure.
All amber and
green LEDs are
slowly flashing All drive CRUs Check for and resolve one of the following situations:
v EXP810 is not connected to the DS4000.
v DS4000 does not have the correct firmware version.
All green LEDs
are off All CRUs Subsystem power is
off Check that all storage expansion
enclosure power cables are
plugged in and the power
switches are on. If applicable,
check that the main circuit
breakers for the rack are
powered on.
ac power failure Check the main circuit breaker
and ac outlet.
Power supply failure Replace the power supply.
Operating
environment is too
hot Cool down the environment.
Chapter 6. Hardware maintenance
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