IBM 9348 Service Information page 261

Parameter Record Size
A
7 128K
Diagnostic Test 172 (Write Buffer to Tape)
Parameter A
=
hold data or next write control.
Write the contents of the next entry in the queue to tape. The following parameters
affect the write operation:
Remove
Remove the record from the buffer following the write operation. If
the test is looped more times than there are buffer entries, the test
fails with an empty buffer.
Hold
Hold the record in the buffer following the write operation.
Stream
Attempt to stream by starting to write the next record in the buffer.
If no write command is received, the startup is canceled and the
tape is positioned again.
Single
Do not start the next write operation. Streaming will not occur.
E m r normal
Stop on all errors.
Error bypass Stop on all errors except write errors. Write errors are logged in
the error and error rate logs and can be displayed using INFO.
Parameter Description
A
0 Remove / stream / error normal
1
Hold / stream 1 error normal
2 Remove / single / error normal
3 Hold 1 single 1 error normal
4
Remove I stream / error bypass
5 Hold 1 stream 1 error bypass
6 Remove / single / error bypass
7
Hold / single / error bypass
Diagnostic Test 173 (Read from Tape to Buffer)
Parameter A
=
hold data or next read control.
A record is read from the tape into the data buffer. The following parameters affect
the read operation:
Remove
Remove the record from the buffer following the read operation.
Hold
Hold the record in the buffer following the read operation. Note that
if the test is looped more times than there is room left in the buffer,
the test fails with a full buffer.
Stream
Attempt to stream by starting to read the next record from the tape.
If no read command is received, the startup is canceled and the
tape is positioned again.
no not s w the next read o~eration.
stream in^
will not occur.
Appendix B . magnostic Tests
B-19