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Diagnostics and System Management Services 177
1. Firmware Passwords
You 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
When the system is powered on, it checks whether a power-on
password (POP) 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. You are given three
attempts to enter the correct password. If you fail to supply the correct
password, the system will go into a hung state and must be
powered-off before continuing.
• Privileged Access Password
The Privileged Access Password (PAP) is used to limit access to the
System Management Services (SMS) programs (also called the
Supervisory Password). When you press one of the keys to access
SMS, the system will check to see if a Privileged Access password
exists, if it does, you are prompted to enter the Privileged Access
password. You are given three attempts to supply the correct
password. If you fail to do so, the system will go into a hung state and
must be powered-off before continuing.