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v Both power supplies have built-in temperature sensors designed to prevent the
v The FAStT900 Storage Server is capable of power-up recovery without operator
v When a power supply fails, the green power indicator light on the power supply
v If you replace the power supply CRU and still experience problems, the
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 FAStT900 Storage
Figure 44. Power supply switch, ac power connectors, and indicator lights
power supplies from overheating. If a temperature sensor detects an ambient air
temperature greater than 70° C (158° F), the "overheated" power supply
automatically shuts down. The second power supply remains on as long as its
temperature remains below 70° C (158° F). If the second power supply
overheats, it turns off all power to the FAStT900 Storage Server.
Note: There is a serious problem if the air temperature inside the rack cabinet is
hot enough to cause the power supplies to shut down.
intervention. Once the air temperature cools to below 70° C (158° F), the power
supplies automatically restart. An automatic restart resets the controllers,
attempts to restart the hard disk drives, which has no effect on the hard disk
drives if they are already running, and returns the FAStT900 Storage Server to
normal operation.
goes off and the amber power supply fault light is lit on the front of the FAStT900
Storage Server. For more information, see "Power supply indicator light" on
page 26 and "Storage server indicator lights" on page 20.
FAStT900 Storage Server might have defective components or connections.
Check the storage-management software for indications of other component
failures.
Server, as shown in Figure 44. Be sure that the green power indicator light on
the failed power supply is off.
Chapter 3. Replacing the FAStT900 Storage Server components
51
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