4
Error Handling and Analysis
4.1 In This Chapter
This chapter includes:
•
Error handling services overview
•
Field replaceable units
•
OpenVMS error log
•
Module NVRAM status and LED indicators
•
FTSS error reporting interface
•
Firmware interfaces
•
Firmware and OpenVMS interface data structures
•
Error log analysis
4.2 Error Handling Services Overview
The primary function of the error handling services (EHS) is to handle and
recover from high-level system interrupts generated by the hardware when an
error is detected. When an error occurs, the EHS is invoked by hardware as an
interrupt service routine.
The interrupt service routine isolates the failure by examining various system
registers. The isolation process occurs at a high system priority level; it pauses
the OpenVMS operating system until it is complete.
After isolating the faulty FRU, the EHS determines the appropriate actions
to take. For solid errors, system deconfiguration is performed and the FRU is
removed from service. This usually involves performing module resets to invoke
diagnostics.
Error Handling and Analysis 4–1