6. DATA SOURCES › 6.2 Record Descriptions › 6.2.5 System Initialization Record (IPL)

6.2.5 System Initialization Record (IPL)

The IPL records are written to document operating system
initialization.  These records are always written by OS/VS1,
OS/VS2 and MVS/XA, while other MVS systems do so only if the
reliability data extractor (RDE) option is in effect.

This record is also generated to provide information about
power-line disturbances that cause system termination.

When the RDE option is in effect, the operator is prompted by
a message to supply a reason code for the IPL and an ID code
for the responsible subsystem.  These are then included in
the record when it is written to the ERDS.  The reason codes
and ID codes can be found in the following manuals:
SYS1.LOGREC Error Recording for MVS VSE/Advanced Functions
System Management Guide for VSE.

The record type is 50.