From the system console facility of the hardware
management console, operators can specify the device number of
the volume for the input/output definition file (IODF), select a LOADxx
member, and control the display of messages and system prompts during
initialization.
The operator can specify the following values to initialize the
system control program:
- The device number of the volume where the IODF, a VSAM data set
that manages system configuration data, resides. This is also the
device on which the search for the LOADxx member of SYSn.IPLPARM or
SYS1.PARMLIB begins. For information about IODF and SYSn.IPLPARM,
see z/OS HCD Planning and z/OS MVS Initialization and Tuning Reference.
- The LOADxx member of SYS1.PARMLIB or SYSn.IPLPARM (see z/OS MVS Initialization and Tuning Reference for
a detailed description of LOADxx).
- The initialization message suppression indicator (IMSI) that controls
the suppression of messages and system prompts during initialization.
- The alternate nucleus. (This specification overrides the value
specified for the alternate nucleus in LOADxx.)
LOADxx allows you to specify I/O configuration data and information
about the IODF data set, the nucleus, the master catalog, and the
IEASYMxx and IEASYSxx parmlib members. For information about those
parmlib members, see z/OS MVS Initialization and Tuning Reference.
For information about the IODF data set, see z/OS HCD Planning.
Using LOADxx is a good way to automate the initialization
procedure for your system and simplify the process for your operators.
The IMSI character tells the system whether or not to do the following
during system initialization:
- Display most informational messages.
- Prompt for system parameters.
- Prompt for the name of the master catalog.
See the topic on
loading the system software in z/OS MVS System Commands
for a table that shows the possible values for the IMSI character.
The values indicate all possible combinations of the actions listed
above.