DEC 4000 AXP Service Manual page 22

Option LEDs During Power-Up
The power supply LEDs display pass/fail test results for the power supply
subsystem; the operator control panel (OCP) LEDs display pass/fail self-test
results for CPU, memory, I/O, and Futurebus+ modules. Storage devices and
Futurebus+ modules have their own LEDs as well.
RECOMMENDED USE: Monitor LEDs during power-up to see if the devices
pass their self-tests. Refer to Chapter 2 for information on LEDs and power-
up tests.
Operating System Exercisers (DEC VET or UETP)
The Digital Verifier and Exerciser Tool (DEC VET) is supported by the
OpenVMS and DEC OSF/1 operating systems. DEC VET performs exerciser-
oriented maintenance testing of both hardware and operating system. UETP
is included with OpenVMS and is designed to test whether the OpenVMS
operating system is installed correctly.
RECOMMENDED USE: Use DEC VET or UETP as part of acceptance testing
to ensure that the CPU, memory, disk, tape, file system, and network are
interacting properly. Also use DEC VET or UETP to stress test the user's
environment and configuration by simulating system operation under heavy
loads to diagnose intermittent system failures.
Crash Dumps
For fatal errors, such as fatal bugchecks, OpenVMS and DEC OSF/1 operating
systems will save the contents of memory to a crash dump file.
RECOMMENDED USE: The support representative should analyze crash
dump files. To save a crash dump file for analysis, you need to know
proper system settings. Refer to the OpenVMS AXP Alpha System Dump
Analyzer Utility Manual or the Guide to Kernel Debugging (AA–PS2TA–TE)
for instructions.
Other Log Files
Several types of log files, such as operator log, console event log, sethost log,
and accounting file (accounting.dat) are useful in troubleshooting.
RECOMMENDED USE: Use the sethost log and other log files to
capture/examine the console output and compare with event logs and crash
dumps in order to see what the system was doing at the time of the error.
1–10 System Maintenance Strategy