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Work with alternate installation device
An alternate installation IPL is a special kind of type D IPL.
Two pieces of media are involved in such an installation: the alternate IPL load source (usually an optical device) and the alternate installation medium. The alternate installation medium contains the Licensed Internal Code that will be installed or restored on the system. The alternate installation medium is placed on any bus.
To
enable an alternate installation IPL, select the DST option Work
with alternate installation device. This option is available in
DST from control panel function 21 or a type D manual IPL.
Notes:
- When an alternate bus load source is defined, the Licensed Internal Code also performs an IPL on this bus and IOP for main storage dump IPLs and as a possible dump device.
- If no alternate load source is defined for the alternate installation, the Licensed Internal Code performs an IPL only on the IOPs on bus 1 and uses the IPL load source.
