178 RS/6000 43P 7043 Models 150 and 260 Handbook
Unattended Start Mode
To use this mode, a power-on password must be previously specified. If
unattended start mode is enabled, the system will boot from the
defined boot device without requiring the you to enter the power-on
password. While the system can be booted without entering the POP
password, the keyboard controller will be programmed to lock up until
the POP password is provided. This mode is ideal for servers that run
unattended. After an electrical power failure, for example, the operating
system will be rebooted without waiting for you to enter the power-on
password.
Figure 39 shows the SMS submenu where you can set the password.
Figure 39. SMS Submenu - Firmware Passwords