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AIX Version 4.3 System Management Guide: Operating System and Devices

Booting from Hard Disk for Maintenance


A bootable removable media (tape or CD-ROM) must not be in the drive.


To boot a machine in Service mode from a hard disk:

  1. Set the key to the Service position and reboot the machine. To reboot, either turn the machine off and then power it back on, or press the yellow button.
  2. The machine will boot to a point where it has a console device configured.

    If there is a system dump that needs to be retrieved, the system dump menu will be displayed on the console. Refer to the AIX Version 4.3 Problem Solving Guide and Reference for information on copying the dump to removable media.

    Note: If the console fails to configure when there is a dump to be retrieved, the system will hang. The system must be booted from a removable medium to retrieve the dump.
  3. If there is no system dump, or if it has been copied, the diagnostic operating instructions will be displayed, and the user will be asked to press Enter to continue to the Function Selection menu.
  4. From the Function Selection menu, you can select diagnostic or single user mode:

    Single-User Mode: To perform maintenance in a single-user environment, choose this option (option 5). The system will continue booting and enter single-user mode. Maintenance that requires the system to be in a standalone mode can be performed in this mode, and the bosboot command can be run.

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