Ibm RS/6000 User Manual download pdf (Page 91)

13. If Power-On Password or Privileged Access Password options are in effect,

then the Password screen appears. There are three attempts to the correct

password; otherwise the 8-digit error code 00016005 is displayed, and the

system stops. The only way to recover the system is to power-off and

power-on again.

4.4.2 Firmware Passwords

The user can limit access to the system by using passwords. The passwords can

be up to eight characters long and are stored in NVRAM. There are three

categories of restricted access:

 Power-On password

 Privileged Access password

 Unattended start mode

Do Not Have the Password?

In case you don't have a machine's password, the only way to get access to the

system is by removing the system's battery. You must be aware that this

procedure will erase all firmware configuration data maintained in NVRAM, such

as the error log and any configured IP addresses.

4.4.2.1 Power-On Password (POP)

When the system is powered on, it checks whether a power-on (POP) password is

present. If there is one present and the “unattended start mode” is NOT set, it

means the machine's owner does not want the system to be used unless the POP

password is supplied. In this case, the system will prompt for the POP password.

The user is given three attempts to enter the correct password. If the user fails to

supply the correct password, the system will go into a “hung” state and must be

powered off before continuing.

4.4.2.2 Privileged Access Password - PAP

The Privileged Access password is used to limit access to the System Management

Services (SMS) programs (also called the Supervisory Password When the user

presses one of the keys to access SMS, the system will check to see if a Privileged

Access password exists; if it does, the user is prompted to enter the Privileged

Access password. The user is given three attempts to supply the correct

password. If the user fails to do so, the system will go into a “hung” state and must

be powered off before continuing.

4.4.2.3 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 user 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 a user to enter the

power-on password.

Chapter 4. Boot Support and Firmware 67

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