IBM 9348 Service Information page 245

Create record in buffer
Write density ID
Write buffer to tape
Write tape mark
Write tape mark
Rewind
Read from tape to buffer
Rewind
Clear data buffer
(A
-
3,
rotating;
B
-
32K)
(A
=
1600)
(A
-
1; loop)
(A
-
0; loop)
Diagnostic Test 3 (Initialize Error Rate Sequence)
Initializes the total logs in preparation for running the error rate sequence.
The Sequence:
175
-
Initialize total logs
Diagnostic Test 4 (Error Rate Sequence)
A scratch tape is needed for this test.
This sequence writes a tape in 6250 density, rewinds and reads it, then performs the
same operations in 1600 density. While the sequence runs, read/write errors are
recorded in the total error rate log. The error rate results are shown in the total
error rate logs using the INFO option and values of 3,4, and 5.
Error rate results are collected until Sequence 3 is used to initialize the log.
Test 4 is similar to Test 2 (Wellness Test) except that hard read and write errors do
not stop the test. Hard errors are only logged.
The sequence is the same as Test 2.
Diagnostic Test 9 (Multiprocessor Sequence)
This sequence starts all multiprocessor tests to check out the communication
between the processors, the message bus, and the data transfer paths. It will
normally start after each processor has started its own power-on sequence and
made communications ready at power on.
The sequence:
Diagnostic Test 11 (Dual-Port Direct-Access Storage [RAM
J
Sequence)
This sequence performs all tests on the dual-port direct-access storage between all
target processors.
The sequence:
Appendix B.
Diagnostic
Tests
B-3