IBM System/370 Guide

• Processor Logout Analysis Program for operation under OS to analyze
SYS1.LOGREC MeB records and attempt to identify replaceable
malfunctioning hardware components.
• System Test, Channel Test, CPU Test, and Storage Test programs
for customer engineer use in identifying malfunctioning hardware
units in the system (stand-alone routines).
• Microdiagnostics for customer engineer use in diagnosing
malfunctioning field-replaceable units (stand-alone routines).
OLTEP AND OLT's
OLTEP is designed to operate as a processing program under operating
system control and is a system generation option. The OS OLTEP provided
for operation on System/370 contains functions in addition to those
provided by the currently available os OLTEP. OLT's must be ordered
from the customer engineer, link-edited, and placed in a library (POS)
for use under OS OLTEP control. A stand-alone version of OLTEP, called
OLTSEP, will be available as well.
OLTEP directs the selection, loading, and execution of device-
dependent OLT's for the purpose I/O device testing and error diagnosis.
OLTEP provides the required interface between the operating system
and the device-dependent OLT's.
As with any other job step, OLTEP is inVOked with job control and
executes with a user-assigned priority. A minimum program area of
16K is required for OLTEP operation in OS environments. The input
stream or system console device can be used to supply the parameters
required for test operations - devices to be tested, options desired,
etc. (The ability to use other than a console is a new feature.)
OLTEP insures the protection and security of user data sets and
processor storage in use while OLT's are operating. It also insures
that the devices to be tested are online or offline (as far as the
operating system is concerned), as required by the particular device
type.
OLTEP has the new capability of being able to access the error
log data set (SYS1.LOGREC) to obtain history records describing previous
I/O errors on the device being tested. In addition, multiple devices
can be tested during one OLTEP execution. If a console is used to
define the test run, prompting can be requested as an aid to the
operator supplying the definition.
OLTEP and OLT's operate concurrently with other executing jobs in
a multiprogramming environment and provide online channel, control
unit, and I/O device testing and repair, eliminating the necessity
for complete system unavailability.
PROCESSOR LOGOUT ANALYSIS PROGRAM
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This routine runs under OS control and performs the following:
1. Formats and prints the machine check records written in
SYS1.LOGREC
2. Creates and maintains a logout history on a secondary data set
3. Analyzes the MeH logout data records that describe hardware
errors and prints the location of suspected malfunctioning
replaceable units4 The history logout data set can be used

IBM System/370 Specifications

General

Brand	IBM
Model	System/370
Category	Server
Language	English