An interface defined the ACPI

An hardware error detected by hardware and reported to software.

x86 machine check architecture is a hardware programming interface to allow software to report and handle both corrected and uncorrected hardware errors. This is an architectural interface with some a [..]

The x86 CPU raises an int 18 exception to signify an uncorrected hardware error. The operating system has a special handler to process the information contained in the MCA

Error Correcting Code. A specific code that can detect and correct errors. Typical ECC codes can detect two bit of errors and correct one bit (there are some advanced encodings that can handle more er [..]

An hardware error that was corrected by the hardware (e.g. using a single bit data corruption that was correctible using ECC

An uncorrected hardware error detected by the hardware. Data corruption has occurred. These errors require software reaction.

Using trends in (primarily) corrected errors to predict future failure of hardware components and automatically taking steps to avoid outages. mcelog implements automatic offlining for memory

Used for reporting uncorrected errors on PCI Express links on newer Xeon systems. Supported by mcelog, see IO errors

PCI-Express Advanced Error reporting. Used for error reporting on PCI Express links. Not supported by mcelog, but logged to the normal kernel log. For more details one the implementation see the OLS p [..]