Continuously Powered Main Storage (CPM) IPL SRCs:

C6xx 4410 Unattended DASD checker started
C6xx 4411 Attended DASD checker started
C600 4412 Storage management recovery started
C600 4414 LIC log started
C600 4416 Shutdown or programmed (CPM-related) IPL has started

Dedicated Service Tools (DST) SRCs for Attended IPLs:

C600 4500 Verifying network attributes
C600 4501 Looking for the console
C600 4502 Starting DST display task
C600 4503 Checking possible machine-readable information (MRI) on media
C600 4504 Verifying system serial number
C600 4505 Verifying system type
C600 4506 Verifying system-unique ID (OS/400 only
C600 4507 Starting 'before DST' DASD checker
C600 4508 Verifying system password (if DASD check OK; if not OK this is checked when IPLing past DST)
C600 4509 Starting DASD migration function (only if migrating)
C600 450A Starting 'after DST' DASD checker (can happen twice)
C600 450C DST IPL status

Dedicated Service Tools (DST) SRCs for Unattended IPLs:

C600 4500 Verifying network attributes
C600 4504 Verifying system serial number
C600 4505 Verifying system type
C600 4506 Verifying system-unique ID (OS/400 only)
C600 4508 Verifying system password (if DASD check OK)
C600 450A Starting 'after DST' DASD checker

Licensed Internal Code (LIC) SRCs for IPLs:

C600 4A57 Parallel database recovery is at Pass 1
C600 4A60 Parallel database initialization is at Pass 1
C600 4B57 Parallel database recovery is at Pass 2
C600 4B60 Parallel database initialization is at Pass 2
C600 4C57 Parallel database recovery is at Pass 3
C600 4C60 Parallel database initialization is at Pass 3
C600 4F57 The system is recovering all database objects. This step can take several hours. It can occur any time when database recovery is in progress.
C600 4F60 The system is examining all objects during database initialization. It can occur any time when database initialization is in progress.

Note:   At this point LIC initialization is complete, and operating system starts. All hardware is verified.