9

9.3 Basic Definitions for the Card Cage

When locating a board slot in the 8-slot and 16-slot card cages, remember:

Slot numbers

Even-numbered slots are at the front of the card cage. Odd-

 

numbered slots are at the back.

 

In the front of the card cage, even-numbered slots begin with slot

 

0 at the top. At the rear of the card cage, odd-numbered slots

 

begin with slot 1 at the top.

 

Install the boards with component side down in the front slots and

 

with component side up in the rear slots.

 

For specific slot numbers, see Appendix B, “Functional

 

Description.”

Slot functions

All card cage slots are equivalent. However, for convenience in

 

installing I/O cables, it is suggested that you install

 

CPU/Memory boards at the front of the cage and install I/O

 

boards at the back of the cage. When all slots are filled on one

 

side of the cage, you can use the other side.

 

Slot 1 should contain an I/O board connected to the boot disk.

 

(This is not a requirement.)

 

Slot 0 should contain a CPU/master board with at least one CPU.

 

The POST diagnostics display more messages if slot 0 contains a

 

CPU/Memory board and a CPU. For an explanation, see the next

 

item, “Master board.”

Master board

There is no master board during normal system operations. The

 

first CPU/Memory board (in slot 0) functions temporarily as a

 

master board during some POST tests.

 

 

9.4 Diagnosing Problems

When board LED codes indicate a hardware problem, several types of software programs are available to supply information about the problem.

9.4.1 Error Messages

Error messages and other system messages are saved in the file /var/adm/messages.

Troubleshooting Overview

9-7

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Sun Microsystems 6000, 4000, 5000 manual Basic Definitions for the Card Cage, Diagnosing Problems, Error Messages

4000, 5000, 6000 specifications

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