Sun Microsystems 280R manual How to Isolate Failures Using Sun Remote System Control RSC

Note –Beforeattempting to boot again, restore a working system configuration by resetting the appropriate variables in the NVRAM using the OpenBoot setenv command at the ok prompt. The Safe NVRAM mode settings are temporary session settings to ensure a successful recovery boot.

How to Isolate Failures Using Sun Remote System Control (RSC)

●Run each OpenBoot Diagnostics test from the ok prompt.

When you type obdiag, the utility displays a numbered list of available tests.

How to Isolate Failures Using Power-On Self-Test (POST)

When you turn on the system power, POST diagnostics run automatically if any of the following conditions apply:

■The OpenBoot PROM configuration variable diag-switch?is set to true when you power on the system.

■You turn the keyswitch to the Diagnostics setting and press the Power button.

Note –The Stop-D (Stop-Shift-d) keyboard sequence functionality is closely emulated by using Safe NVRAM mode. Perform the procedure “How to Use Default NVRAM Parameters” on page 178, and then set the variable diag-switch?to true and power-on the system.

Note –The Stop-D (Stop-Shift-d) and the Stop-F (Stop-Shift-f) keyboard sequences are not supported on systems with USB keyboards.

For information about the various keyswitch positions, see “Status and Control Panel Features” on page 8.

Before You Begin

You can set up your server to display POST and diagnostics output in the system console or in the RSC console, but not on both at the same time.

Chapter 6 Diagnostics, Monitoring, and Troubleshooting 179