uncorrectable non-fatal errors are masked so they are logged, but will not generate an Err0. Unlike
correctable non-fatal errors, the uncorrectable non-fatal errors will automatically force an F1 Boot prompt
on the next reboot.
Fatal errors are not masked.
When errors are detected and not masked, they generate an Err0 signal. There are four ways to handle
this type of error.
●
Ignore (mask out the error)
●
Generate an SMI which results in a reboot
●
Generate an NMI which results in a crash
●
Generate a Machine Check which results in a crash
Default is to generate an SMI. Use the Advanced > Chipset option in the F10 Setup menu to control
this type of error.
Error classes
There are two major classes of errors—fatal and non-fatal.
All fatal errors generate error 922-Fatal error on (subsystem is identified)
Non fatal errors generate a different error number for each subsystem and for correctable and
uncorrectable error types:
Error Class Type Description Device Result
922 Fatal Don't care Fatal error on <device> Any Err0
923 Non-fatal Uncorrectable Non-fatal, uncorrectable PCI
error on (slot is identified)
PCI or PCI-X F1 prompt
924 Non-fatal Correctable Non-fatal, correctable PCI error
on (slot is identified)
PCI or PCI-X F1 optional
925 Non-fatal Uncorrectable Non-fatal, uncorrectable ESI
error on (slot is identified)
PCI or PCI-X F1 prompt
926 Non-fatal Correctable Non-fatal, correctable ESI error
on (slot is identified)
PCI or PCI-X F1 optional
927 Non-fatal Uncorrectable Non-fatal FSB error on (FSB is
identified)
Front side bus F1 prompt
928 Non-fatal Uncorrectable Non-fatal, uncorrectable FBD
error on (DIMM is identified)
Memory F1 prompt
929 Non-fatal Correctable Non-fatal, correctable FBD error
on (DIMM is identified)
Memory F1 optional
930 Non-fatal Correctable Non-fatal, Internal Northbridge
error
Memory
controller
F1 optional
126 Chapter 5 System diagnostics and troubleshooting ENWW
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