IBM RS/6000 7043 43P Series Service Manual page 167

The following describes the choices available on this screen.
Select Software: The Select Software option, if supported by
the operating system, allows you to choose which operating
system to use. This option is supported by AIX. Not all
operating systems support this option.
If you receive an informational message saying that no
operating system is installed, then the system information in
non-volatile storage may have been lost. This can happen if
the battery has been removed. To correct this situation, refer
to the bootlist reference in your AIX operating system
documentation.
Software Default: This option, if supported by the operating
system, enables you to select an operating system as the
default operating system for your system unit.
Install From: Enables you to select a media drive from which
to install an operating system.
7-7
Chapter 7. System Management Services