Temperature Checkout; Diagnosing Errors; Troubleshooting The Ethernet Controller - IBM 8646 - Eserver xSeries 220 Hardware Maintenance Manual

Temperature checkout

Proper cooling of the system is important for proper operation and system
reliability. For a typical IBM xSeries server, you should make sure:
v Each of the drive bays has either a drive or a filler panel installed
v The cover is in place during normal operation
v There is at least 50 mm (2 inches) of ventilated space at the sides of the server
v The cover is removed for no longer than 30 minutes while the server is
v A removed hot-swap drive is replaced within two minutes of removal
v Cables for optional adapters are routed according to the instructions provided
v The fans are operating correctly and the air flow is good
v A failed fan is replaced within 48 hours
In addition, ensure that the environmental specifications for the system are met.
See "Features and specifications" on page 4.

Diagnosing errors

To find solutions to problems that have definite symptoms, see "Error symptoms"
If you cannot find the problem there, go to "Starting the diagnostic programs" on
page 14 to test the server.
If you have just added new software or a new option and the server is not
working, do the following before using the error symptoms table:
v Remove the software or device that you just added.
v Run the diagnostic tests to determine if the server is running correctly.
v Reinstall the new software or new device.

Troubleshooting the Ethernet controller

This section provides troubleshooting information for problems that might occur
with the 10/100 Mbps Ethernet controller.
Network connection problems
If the Ethernet controller cannot connect to the network, check the following:
v Make sure that the cable is installed correctly.
v Save the configuration.
and 100 mm (4 inches) at the rear of the server
operating
with the adapters (ensure that cables are not restricting air flow)
on page 97.
The network cable must be securely attached at all connections. If the cable is
attached but the problem persists, try a different cable.
If you set the Ethernet controller to operate at 100 Mbps, you must use Category
5 cabling.
If you directly connect two workstations (without a hub), or if you are not using
a hub with X ports, use a crossover cable.
Note: To determine whether a hub has an X port, check the port label. If the
label contains an X, the hub has an X port.
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Diagnostics