Real-Time Clock, Cmos Sram, And Battery; Supervisor And User Password Functions - MAXDATA PLATINUM 220 System Manual

• Setting a user password restricts who can boot the server. The password prompt is displayed
before the server is booted. If only the supervisor password is set, the server boots without
asking for a password. If both passwords are set, you can enter either password to boot
the server.
Table 10. Supervisor and User Password Functions
Password Supervisor
Set Mode
Neither Can change
all options
(Note)
Supervisor Can change
only all options
User only N/A
Supervisor Can change
and user set all options
Note: If no password is set, any user can change all Setup options.

Real-Time Clock, CMOS SRAM, and Battery

The real-time clock provides a time-of-day clock and a multi-century calendar with alarm features. The
real-time clock supports 256 bytes of battery-backed CMOS SRAM in two banks that are reserved
for BIOS use.
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer is
not plugged into a wall socket, the battery has an estimated life of three years. When the computer
is plugged in, the standby current from the power supply extends the life of the battery. The clock is
accurate to ± 13 minutes/year at 25º C with 3.3 VSB applied.
The time, date, and CMOS values can be specified in the BIOS Setup program. The CMOS values
can be returned to their defaults by using the BIOS Setup program.
 NOTE
If the battery and AC power fail, custom defaults, will be loaded into CMOS RAM at power-on if the
defaults have been previously saved.
24
User Mode Setup Options
Can change None
all options
(Note)
Can change Supervisor
a limited Password
number of
options
Can change Enter Password
all options Clear User Password
Can change Supervisor
a limited Password
number of Enter Password
options
Password to Password
Enter Setup During Boot
None None
Supervisor None
User User
Supervisor Supervisor or
or user user
Server Description