24 Sun Blade T6300 Server Module Administration Guide • April 2007
■ If a fatal error is detected by POST or OpenBoot Diagnostics, the system does not
boot regardless of the settings of auto-boot? or auto-boot-on-error?. Fatal
nonrecoverable errors include the following:
■ Any CPU failure
■ Any logical memory bank failure
■ Flash RAM cyclical redundancy check (CRC) failure
■ Critical field-replaceable unit (FRU) PROM configuration data failure
■ Critical system configuration SEEPROM read failure
■ Critical application-specific integrated circuit (ASIC) failure
Reset Scenarios
Three ALOM configuration variables, diag_mode, diag_level, and
diag_trigger, control whether the system runs firmware diagnostics in response
to system reset events.
The standard system reset protocol bypasses POST completely unless the virtual
keyswitch or ALOM variables are set as follows:
Therefore, ASR is enabled by default. For instructions, see “Enabling and Disabling
Automatic System Recovery” on page 25.
Automatic System Recovery User Commands
ALOM commands are available for enabling and disabling ASR and for obtaining
ASR status information.
For more information, see:
TABLE 2-3 Virtual Keyswitch Setting for Reset Scenario
Keyswitch Value
virtual keyswitch diag
TABLE 2-4 ALOM Variable Settings for Reset Scenario
Variable Value Default
diag_mode normal or service normal
diag_level min or max min
diag_trigger power-on-reset error-reset power-on-reset
