Sun Microsystems 220R How to Use OpenBoot Diagnostics OBDiag, Optional Select a diagnostic level

How to Use OpenBoot Diagnostics (OBDiag)

When you turn on the system power, OBDiag runs automatically if any of the following conditions apply:

■The OpenBoot PROM (OBP) variable diag-switch?is set to true.

■You hold down the keyboard’s Stop and D (Shift-d) keys as you power on the system, and then the systems’s ok prompt will appear. See “How to Power On the System” on page 34.

You can also run OBDiag in an interactive mode and select which tests you want to perform. The following procedure describes how to run OBDiag interactively from the system ok prompt.

What to Do

Note –Perform this procedure with the power on and the keyswitch in the Power-On/Off position.

1.With the keyswitch in the Power-On/Off position, press the Break key on your alphanumeric terminal’s keyboard, or enter the Stop-a sequence on a Sun keyboard.

To enter the Stop-asequence, press the Stop key and the a key simultaneously. The ok prompt is displayed.

2.(Optional) Select a diagnostic level.

Three different levels of diagnostic testing are available for OBDiag; see “How to Set the Diagnostic Level for POST and OBDiag” on page 131.

3.Then type:

ok setenv diag-switch? true

diag-switch? = true

Chapter 7 Diagnostics and Troubleshooting 129