Table20. Symptom-to-FRU index (continued)
Problem
indicator Component Possible cause Possible solutions
Amber LED is lit
(continued)
Front panel
(Global
Summary Fault
LED)
General machine
fault
AFault LED is lit somewhere on
the storage subsystem (check for
Amber LEDs on CRUs).
General machine
fault (continued)
Open the DS5020 Storage
Subsystem Management window
and click on the Recovery Guru
to see problems in the DS5020
configuration.
Some errors will cause the
Global Summary Fault LED to be
lit but will not cause any
individual CRU Fault LEDs to be
lit. (Drive PFAexceeded or
nominal temperature exceeded
errors are a few examples.)
Follow the corrective actions in
the Recovery Guru window.
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
storage subsystem. Replace the
failed SFP module. See the DS
Storage Manager software
documentation for more
information.
Battery unit
fault
Battery unit failure Verifythe failure using DS
Storage Manager Client and
replace the failing battery.
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
(Fault and
Power LEDs lit;
SAAlit; Direct
Current Enable
LED is not lit)
Power supply failure Replace the failed power supply.
Operating
environment is too
hot
Cool down the environment.
Fan failure Replace the power supply and
fan unit CRU
All amber and
green LEDs are
slowly flashing
All drive CRUs The DS5020 controllers are going through start-of-day
process (booting up). Wait up to five minutes for the
controllers to complete the booting process. If the drive
Activity LEDs are not steady lit or momentarily flicker,
and the amber LEDs are unlit after waiting more than
six minutes, contact IBM support.
Chapter6. Hardware maintenance 155