Technical data

6 Testing
1.2.2 Self-Test Codes
If an error is detected during a self-test, a question mark (?) is put next
to the test number and a failure message (84 FAIL) is displayed. You
must display the configuration table (enter TEST 50) after a self-test is
complete to see the error code.
1.3 Running System Exerciser Diagnostics
The system exerciser simulates a worst-case operating system situation
test for each device and checks how the device operates under these
conditions. This type of testing usually finds any interactive problems.
To run the field service mode system exerciser, perform the following
steps:
1. Install a loopback on the communication port.
2. Insert and load the special-keyed test diskette, compact test disk, and
tape cartridge.
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3. Enter TEST 101, TEST 102, or TEST 80000106.
TEST 80000106 allows you to enter the test number of the individual
devices you want to run the exerciser on. If the diskette or the tape
drive are not loaded with the special-key media, the system exerciser
does not do destructive writes to them and tests them the same way
as it does during the customer mode system exerciser. If the compact
disk drive is not loaded with the test disk, the drive does not perform
any reads. If the test disk is not available, any disk loaded allows
the exerciser to perform reads but does not check the error correction
circuits (ECC).
Refer to Chapter 3 of the VAXstation 3100 Models 38 and 48 Maintenance
Guide if you need information on creating the special diagnostic keys on
the diskette and tape.
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This special key on the media prevents the exerciser from accidentally destroying
data on the customer’s diskette or tape cartridge. The compact disk never does
write testing, only reads.