Reset Scenarios
Three OpenBoot configuration variables, diag-switch?, obdiag-trigger, and post-trigger, control whether the system runs firmware diagnostics in response to system reset events.
The standard system reset protocol bypasses POST and OpenBoot Diagnostics completely unless the variable diag-switch?is set to true, or the system control keyswitch is in the Diagnostics position. The default setting for this variable is false. Therefore, to enable ASR, which relies on firmware diagnostics to detect faulty devices, you must change this setting to true. For instructions, see “Enabling and Disabling Automatic System Recovery” on page 44.
To control which reset events, if any, automatically initiate firmware diagnostics, the OpenBoot firmware provides variables called obdiag-triggerand post-trigger. For detailed explanations of these variables and their uses, refer to the Netra 440 Server Diagnostics and Troubleshooting Guide (817-3886-xx).
Automatic System Recovery User Commands
The OpenBoot commands .asr, asr-disable, and asr-enableare available for obtaining ASR status information and for manually unconfiguring or reconfiguring system devices. For more information, see:
■“Unconfiguring and Reconfiguring Devices” on page 46
■“To Reconfigure a Device Manually” on page 48
■“Obtaining Automatic System Recovery Information” on page 46
Enabling and Disabling Automatic System Recovery
The automatic system recovery (ASR) feature is not activated until you enable it at the system ok prompt.
▼To Enable Automatic System Recovery
1.At the ok prompt, type:
ok setenv diag-switch? true ok setenv auto-boot? true
ok setenv auto-boot-on-error? true
