Troubleshoot Hardware Faults Using the Oracle ILOM Web Interface
Troubleshooting and Diagnostics
35
To reduce the risk related to component failure, power supplies and fan modules are installed
in pairs to provide redundancy. Redundancy ensures that if one component in the pair fails,
the other functioning component can continue to maintain the subsystem. For example, power
supplies serve a dual function; they provide both power and airflow. If one power supply fails,
the other functioning power supply can maintain both the power and the cooling subsystems.
Action
: Investigate the cause of the over-temperature event, and replace failed components
immediately
. For hardware troubleshooting information, see
“Troubleshooting Server Hardware
Prevention
: Component redundancy is provided to allow for component failure in critical
subsystems, such as the cooling subsystem. However, once a component in a redundant
system fails, the redundancy no longer exists, and the risk for server shutdown and component
failures increases. Therefore, it is important to maintain redundant systems and replace failed
components
immediately
.
Troubleshooting Power Issues
If your server does not power on, the cause of the problem might be:
■
“AC Power Connection” on page 35
■
“Power Supplies (PSUs)” on page 36
■
AC Power Connection
The AC power cords are the direct connection between the server power supplies and the power
sources. The server power supplies need separate stable AC circuits. Insufficient voltage levels
or fluctuations in power can cause server power problems. The power supplies are designed to
operate at a particular voltage and within an acceptable range of voltage fluctuations (refer to
“Electrical Power Requirements” in
Oracle Server X6-2 Installation Guide
).
Action
: Check that both AC power cords are connected to the server. Check that the correct
power is present at the outlets and monitor the power to verify that it is within the acceptable
range. You can verify proper connection and operation by checking the PSU indicator panels,
which are located at the back of the server on the PSUs. Lit green AC OK and DC OK
indicators show a properly functioning PSU. An amber AC OK indicator indicates that the AC
power to the PSU is insufficient.
Prevention
: Use the AC power cord reclosable retaining straps and position the cords to
minimize the risk of accidental disconnection. Ensure that the AC circuits that supply power to
the server are stable and not overburdened. For more information on the reclosable retaining
Summary of Contents for EXADATA X6-2
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