Seagate ST3390N Installationsanleitung PDF herunterladen (Seite 303)

100

101

Troubleshooting startup problems 16-31

System bus diagnostics

Standard 1.0 Modular Option EC Installation and Maintenance Guide November 1999

System bus diagnostics

Introduction

Before you troubleshoot the bootup, verify that the problem is

not with either simple cabling errors or the terminal. Check that

• PCP installation and cabling conform to the guidelines in

Chapter 8 and (there are no loose or improperly installed

cards or cables).

• There are no problems with the terminal (refer to the

procedures in “Troubleshooting terminal problems” on

page 16-15”).

The Meridian Mail system bus is controlled by the utility card

located in node 1 of a multi-node system. A fault on the system

bus can cause all communication between nodes to be lost. If a

system bus problem is suspected, follow the steps outlined

below.

Performing system

bus diagnostics

To perform system bus diagnostics, follow these steps.

Step Action

1 Check the backplane switch settings for all modules. Refer to

Chapter 8 for backplane switch settings.

2 If the utility card diagnostics were on node 1, ensure that the

diagnostics passed. If they did not pass, replace the utility card.

3 Verify that the cabling between shelves is correct and secure.

4 Verify that all cards in the system are properly seated.

5 Observe the BootROM output on the node 1 terminal.

6 If the “Utility Card Check OK” message or the BTGA tests, or

both, do not appear in the BootROM messages, replace the

utility card.

7 If the problem persists, replace the Enhanced MMP40

(MMP40) card.

8 Power on the system.

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