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Invalid page table lookup (scatter gather)
Memory cycle error
B-cache tag address parity error
B-cache tag control parity error
Non-existent memory error
ESC NMI: IOCHK
Processor-Corrected Machine Check (SCB: 630)
Processor-corrected machine checks are caused by B-cache errors that are
detected and corrected by the DECchip 21064 or 21064A microprocessor. These
are nonfatal errors that result in an error log entry. The error handling code for
these errors is common across all platforms using the DECchip 21064 and 21064A
microprocessors.
Single-bit Istream ECC error
Single-bit Dstream ECC error
System transaction terminated with CACK_SERR
System Machine Check (SCB: 620)
These errors (non-fatal) are AlphaServer 1000A-specific correctable errors. These
errors result in the generation of the correctable machine check logout frame:
Correctable read errors
Single power supply failure when operating with redundant power supplies.
System overtemperature warning
4.2 Error Logging and Event Log Entry Format
The Digital UNIX and OpenVMS error handlers can generate several entry types.
All error entries, with the exception of correctable memory errors, are logged
immediately. Entries can be of variable length based on the number of registers
within the entry.
Each entry consists of an operating system header, several device frames, and an
end frame. Most entries have a PAL-generated logout frame, and may contain
frames for CPU, memory, and I/O.
4–4 Error Log Analysis
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