Automatic System Checkout Program - IBM System/370 145 Operating Procedures Manual

• AUTOMATIC SYSTEM CHECKOUT PROGRAM (ASCP)
• The purpose of ASCP is to simulate system operation in
a customer environment by maximum usage of all com-
ponents of the system.
• ASCP provides a quick checkout of CPU channels and
attached I/O devices as a system. The program can be
used by both the customer and the service representative
to obtain a reliability report on the condition of the
total system.
• The program is loaded from the console fi Ie and com-
municates with the operator via some output device
(preferably a printer). After the program is loaded, the
operator readies the device selected as an output device
and follows the step-by-step instructions that are printed
out.
• ASCP requires a dedicated system and does not run
under control of an operating system.
• ASCP provides automatic configuration and testing of
ready devices. I/O devices that can be configured and
tested are:
Direct Access Devices - 2311, 2314, 2321
Tapes - 2415, 2420, 2400
Readers/Punches - 2540, 2520, 2501, 1442 Model N 1
Printers - 1403, 1404, 1443 Model N1
Displays - 2250, 2260
Consoles - 3210, 3215
Terminal Adapters - 2701,2702
Magnetic Character Reader - 1419
Program Concepts
After the system has been initialized and the configuration
is completed, the reliability run is started.
Each I/O device, attached to the system and readied be-
fore configuration, is tested. The program attempts to keep
each device, control unit, or channel busy by initiating I/O
commands to the devices. As soon as control units or chan-
nels reflect busy conditions, CPU tests are started to pro-
vide maximum use of the system.
The program attempts to keep the system on the thresh-
old of system overrun without actually encountering an
overrun con'dition. When all of the devices have been op-
erated with each CPU test, a reliability report is printed.
The test continues until the operator terminates the pro-
gram.
Operating Instructions
1. Load the first ASCP disk on the console file.
2. Press the START CONSOLE FILE key.
3. Ready the device to be used as the output device.
Instructions for running the program are printed
out on the output device.
4. Ready the devices to be tested and press the INTER-
RUPT key to continue. When the unit table is
printed (after about 10 seconds), check that all
devices made ready are in the table.
5. Press the I NTE R R UPT key to continue the program.
Reliability reports are printed at intervals (see sample
printout for interpretation of reports).