bus error


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bus error

(processor)
A fatal failure in the execution of a machine language instruction resulting from the processor detecting an anomalous condition on its bus. Such conditions include invalid address alignment (accessing a multi-byte number at an odd address), accessing a physical address that does not correspond to any device, or some other device-specific hardware error. A bus error triggers a processor-level exception which Unix translates into a "SIGBUS" signal which, if not caught, will terminate the current process.
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Features include automatic timing violation analysis and unlimited buffer size with continuous sampling, shortening the time needed to identify and resolve bus errors.
The bus is normally only reset on bus errors that should never occur on the SCSI bus.
Bus errors and random bus hangs will occur with passive terminations with large configurations or high speed.