About Openboot Diagnostics (Obdiag) - Sun Microsystems Enterprise 250 Owner's Manual

About OpenBoot Diagnostics (OBDiag)

OpenBoot Diagnostics (OBDiag) reside in flash PROM on the main logic board.
OBDiag can isolate errors in the following system components:
Main logic board
Diskette drive
CD-ROM drive
Tape drive
Disk drives
Any option card that contains an on-board self-test
On the main logic board, OBDiag tests not only the main logic board but also its
interfaces:
PCI
SCSI
Ethernet
Serial
Parallel
Keyboard/mouse
RSC/SSP
OBDiag reports test results via the LEDs located on the system front panel. See
"Error Indications" on page 242 for more information about LEDs and error
messages.
OBDiag displays detailed diagnostic and error messages on a local console or
terminal, if one is attached to system. Alternatively, you can display OBDiag output
remotely on a Remote System Control (RSC) console. For more information about
RSC, see "About Remote System Control (RSC)" on page 241.
OBDiag tests run automatically under certain conditions. You can also run OBDiag
interactively from the system ok prompt. For information about running OBDiag,
see "How to Use OpenBoot Diagnostics (OBDiag)" on page 230.
When you run OBDiag interactively from the ok prompt, you invoke the OBDiag
menu, which lets you select which tests you want to perform. For information about
the OBDiag menu, see "OBDiag Menu" on page 224.
The system also provides configuration variables that you can set to affect the
operation of the OBDiag tests. For information about the configuration variables, see
"OBDiag Configuration Variables" on page 225.
Chapter 11 Diagnostics and Troubleshooting 223