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:
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.
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.