v No – Go to step 8.
8. Turn off the power switch on each controller in the storage subsystem and
then power off all connected storage expansion enclosures. Wait 1 minute and
then turn on power to all connected storage expansion enclosures and then to
the storage subsystem. If the power supplies go into operation, go to step 9. If
not, call your IBM service representative.
9. Check the status LEDs on the front and back of the storage subsystem.
For information about storage subsystem LEDs, see “Checking the LEDs” on
page 143.
10. Are the LEDs on the storage subsystem indicating normal status?
v Yes – Go to step 11.
v No – Go to step 12.
11. Use the DS Storage Manager client software to check the status of all storage
subsystems in the configuration. Is the status Optimal for each storage
subsystem?
v Yes – End of procedure. Resume normal operation.
v No – Go to step 12.
12. Diagnose and correct the fault by completing the following steps:
a. Select the Recovery Guru toolbar button in the Subsystem Management
window to run the Recovery Guru.
b. Complete the recovery procedure.
If the Recovery Guru directs you to replace a failed component, use the
individual LEDs on the storage subsystem to locate the specific failed
component.
c. When the procedure is completed, select Recheck in the Recovery Guru.
This will rerun the Recovery Guru to ensure that the problem has been
fixed.
d. If the problem has not been fixed contact your IBM service representative.
Print a storage subsystem profile and save the storage subsystem support
data. The profile and support data will be helpful when troubleshooting
storage subsystem problems. (For information about printing a storage
subsystem profile and saving the support data, refer to the Subsystem
Management window online help.)
Resetting the controller circuit breakers
Each storage subsystem controller has one circuit breaker that provides
over-current protection to the power supply in a power supply and fan unit. The
circuit breaker is mounted inside the controller, in line with the internal power cable.
The circuit breaker provides protection for ac input.
The internal power cable runs from the ac connector on a controller to the power
supply in a power supply and fan unit. Power to the right power supply and fan unit
(as viewed from the front of the storage subsystem) is routed through the top
controller (controller A); power to the left power supply and fan unit is routed
through the bottom controller (controller B).
If a circuit breaker has tripped, the condition might appear as if a power supply and
fan unit has failed. The power supply is no longer providing power to the storage
subsystem. A tripped circuit breaker is indicated when all of the following conditions
are present:
158 IBM System Storage DS5100 and DS5300 Storage Subsystem: Installation, User’s, and Maintenance Guide
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