9 
9.3 Basic Definitions for the Card Cage
When locating a board slot in the
Slot numbers | |
| numbered slots are at the back. |
| In the front of the card cage, |
| 0 at the top. At the rear of the card cage, |
| 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 |
