IBM Netfinity FASt T500, User Reference

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46 IBM Netfinity FAStT500 RAID Controller Enclosure Unit User’s Reference
• The controller unit is capable of power-up recovery without operator intervention.
Once the air temperature cools to below 70
º
C (158
º
F), the power supplies
automatically restart. An automatic restart resets the controllers, attempts to spin up the
drives, which has no effect on the drives if they are already running, and returns the
controller unit to normal operation.
• If a power supply fails, the green power indicator light on the power supply is off and
the amber power supply fault light on the controller fan on the front of the controller
unit glows. For more information, see
"Checking the indicator lights" on page 15 .
• If you replace the power supply CRU and still experience problems, the controller unit
might have defective components or connections. Check the storage-management
software for indications of other component failures.
Replacing a failed power supply
When instructed by the storage-management software, replace a power supply.
1 Check the power supply indicator light on the back of the controller unit, as shown in
Figure 26 . Be sure that the green power light on the failed power supply is off.
Figure 26. Power supply switch, ac power connectors, and indicator lights
If the power supply fails, the
power indicator light is off.
Power switch
ac power
connector
ac power
connector
Power switch
Power indicator
light