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Table 24. Symptom-to-FRU index for DS4500 (continued)
Problem Action/FRU
Software issued a controller
error message.
1. Check Controller Fan.
2. Controller CRU
3. Check Fibre path/SFP, HBA, FC switches, if the LUNs are
not on preferred path error reported.
Software errors occur when
attempting to access
controllers or drives.
1. Check appropriate software and documentation to
make sure the system is set up correctly and the
proper command was run.
2. Power to the Controller
3. Interface cables
4. ID settings
5. Controller
6. Drive
7. Controller backpanel
Fan LED (front cover) is on.
1. Power supply fan CRU
2. Controller fan CRU
Controller and Fan fault
LEDs (front cover) are on.
1. Check both Fan and Controller CRUs for fault LED
and replace faulty CRU.
Fault-A or Fault-B LED
(battery CRU) is on.
1. Battery CRU
Full Charge-A or Full
Charge-B LED (battery
CRU) is off.
1. Power-on Controller and allow batteries to charge for
24 hours until the Full Charge LEDs are on.
2. Battery CRU
3. Both power supplies
No power to controller (all
power LEDs off).
1. Check power switches and power cords.
2. Power supplies
Power Supply LED is off.
1. Check and reseat power supply.
2. Check for overheating. Wait ten minutes for the power
supply CRU to cool down.
3. Power supply CRU
Power Supply CRUs LED
are on, but all other CRU
LEDs are off.
1. DC power harness.
164 IBM TotalStorage DS4500 Fibre Channel Storage Subsystem: Installation, User’s, and Maintenance Guide