Explanation
Initial program load (IPL) cannot continue due
to a problem on the system residence (SYSRES) volume.
The right-most
four bytes of the program status word (PSW) have the following format:
x rr00www
where:
- x
- Irrelevant information.
- rr
- A hexadecimal reason code indicating the reason for the failure.
- www
- The wait state code.
The reason code (
rr) is one
of the following:
- Reason Code
- Explanation
- 01
IPL cannot locate the SYS1.NUCLEUS data set or the system nucleus
member of the SYS1.NUCLEUS data set on the system residence volume
or the SYS1.NUCLEUS data set is described by a format
8 DSCB. The nucleus member is one of the following:
- IEANUC01, which is DAT-on nucleus IEANUC01
- IEANUC0x, which is an alternate DAT-on nucleus where x is not
1
- IEAVEDAT, which is the DAT-off nucleus
DAT is the acronym for dynamic address translation.
- 02
- An incorrect system residence (SYSRES) volume has been chosen
for the IPL.
System action
The system enters a non-restartable wait state.
Operator response
- Reason Code
- Action
- 01
- If you selected an alternate DAT-on nucleus member, make sure
that the alternate nucleus identifier (x of IEANUC0x) was correctly
entered through the console frame, or at absolute storage location X'
F'. Then reIPL the system.
- 02
- Ensure that the correct SYSRES volume is specified for the IPL
then reIPL the system.
If the error persists, notify the system programmer.
Obtain a stand-alone dump if requested by the system programmer.
System programmer response
- Reason Code
- Action
- 01
- Make sure that the SYS1.NUCLEUS data set resides on the system
residence volume, and that it contains the members you want to load, and that it is a data set described with a format 1 DSCB
in the VTOC, not a format 8 DSCB.
- 02
- Ensure that the correct SYSRES volume is specified for the IPL
and that the hardware management console (HMC) load profile points
to this volume. Then reIPL the system.
If the problem persists, search problem reporting
databases for a fix for the problem. If no fix exists, contact the IBM® Support Center. Provide the
stand-alone dump. For reason code 01, also provide the name of the
SYS1.NUCLEUS member that the IPL program could not find.
Source
Initial program load (IPL)