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Chassis Description 19
The server board supports sleep states s0, s1, s4, and s5:
• s0: Normal running state.
• s1: Processor sleep state. No context will be lost in this state and the processor caches will
maintain coherency.
• s4: Hibernate or Save to Disk: The memory and machine state are saved to disk. Pressing the
power button or other wakeup event will restore the system state from the disk and resume
normal operation. This assumes that no hardware changes have been made to the system while
it was off.
• s5: Soft off: Only the RTC section of the CSB and the BMC are running in this state. No
context is saved by the OS or hardware.
Note
The system is off only when the DC power cable is disconnected.
Security
Software Locks
The BIOS Setup and the System Setup Utility (SSU) provide a number of security features to
prevent unauthorized or accidental access to the system. Once the security measures are enabled,
you can access the system only after you enter the correct password(s). For example:
• Enable the keyboard lockout timer so that the server requires a password to reactivate the
keyboard and mouse after a specified time out period1 to 120 minutes.
• Set and enable a supervisor password.
• Set and enable a user password.
• Set secure mode to prevent keyboard or mouse input and to prevent use of the front panel reset
and power switches.
• Activate a hot key combination to enter secure mode quickly.
• Disable writing to the diskette drive when secure mode is set.
• Disable access to the boot sector of the operating system hard disk drive.
Using Passwords
You can set either the user password, the supervisor password, or both passwords.
If only the user password is set, you:
• Must enter the user password to enter BIOS Setup or the SSU.
• Must enter the user password to boot the server if Password on Boot is enabled in either the
BIOS Setup or SSU.
• Must enter the user password to exit secure mode.
If only the supervisor password is set, you:
• Must enter the supervisor password to enter BIOS Setup or the SSU.
• Must enter the supervisor password to boot the server if Password on Boot is enabled in either
the BIOS Setup or SSU.
• Must enter the supervisor password to exit secure mode.