安装HP-UX的怪事，请帮忙，在线等。急！

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光盘引导后，安装开始前，选择美式键盘布局，应该出来安装菜单，但该菜单一晃而过，直接出现以下菜单，致使无法安装，请高手指点迷津：

                 HP-UX CORE MEDIA SYSTEM RECOVERY
                            MAIN MENU


        s.  Search for a file
        b.  Reboot
        l.  Load a file
        r.  Recover an unbootable HP-UX system
        x.  Exit to shell


This menu is for listing and loading the tools contained on the core media.
Once a tool is loaded, it may be run from the shell. Some tools require other
files to be present in order to successfully execute.

Select one of the above: