Compaq AlphaServer ES45 Service Manual page 213

The password length must be between 15 and 30 alphanumeric characters.
Any characters entered after the 30th character are not stored.
Example 6–3 set secure
P00>>> set secure
Console is secure. Please login.
P00>>> login
Please enter the password:
P00>>> b dkb0
The set secure command console puts the console into secure mode. A
password must be set before you can issue set secure. Once the console is
secure, only the boot and continue commands can be used. The boot
command cannot take command-line parameters.
Entering the login command turns off security features for the current
console session. This allows the operator to enter any SRM command—in
this case, a boot command with command-line parameters.
Example 6–4 clear password
P00>>> clear password
Please enter the password:
Password successfully cleared.
P00>>>
Clearing the password returns the system to user mode.
If You Forget the Password
If you forget the current password, use the login command in conjunction with
the control panel Halt button to clear the password, as follows:
1. Enter the login command:
P00>>> login
2. When prompted for the password, press the Halt button to the latched
position and then press the Return (or Enter) key.
3. Press the Halt button to release the halt. The password is now cleared and
the console cannot be put into secure mode unless you set a new password.
System Configuration and Setup 6-19