User Service Guide, Fourth Edition - Server Expansion Unit

Chapter 4

Troubleshooting

Common Installation Problems

CAUTION Do not operate the server with the top cover removed for extended period of time. Otherwise,

overheating can damage chips, boards, and mass storage devices. However, you can safely

remove the top cover while the server is running to remove and replace PCI hot-plug cards.

Most problems are the result of incorrect system and SCSI subsystem configurations.

To troubleshoot an installation problem, perform the following checks in the order given:

1. Check all cable and power connections, including those in the rack, and so on.

2. Ensure the Server Expansion Unit is configured properly.

3. Verify all cables and boards are securely plugged into the appropriate connectors or slots.

4. Remove all extra options, such as disk drives, one at a time, checking its effect on the Server Expansion

Unit.

5. Unplug the power cord, wait 20 seconds, plug the power cord in again, and restart the Server Expansion

Unit.

6. If you suspect a hardware error:

a. Log users off the LAN and power down the Server Expansion Unit.

b. To remove PCI cards, extend the Server Expansion Unit out of the rack and remove the top cover.

c. Simplify the server to the minimum configuration.

The minimum configuration consists of the following:

• One core I/O card installed in the lower slot of the core I/O backplane

NOTE The Server Expansion Unit will work without the top (slave) core I/O card installed

but it will not operate without the bottom (master) core I/O card installed.

• System backplane

• PCI-X backplane

•One BPS (A0)

• Two PCI power modules

• One power cord (A0)

7. Remove all third-party options, and reinstall each one, one at a time, checking the Server Expansion Unit

after each installation.

8. Replace the top cover and reconnect the power cord and other cables.

9. Boot up the Server Expansion Unit and if it does not function properly, refer to the following procedures.