Technical Product Specification

Intel® Server Boards S4600LH2/T2 TPS
Revision 2.0
170
4. Quiet Fan Idle Mode
Option Values: Enabled
Disabled
Help Text:
Enabling this option allows the system fans to operate in Quiet ‘Fan off’ mode while still
maintaining sufficient system cooling. In this mode, fan sensors become unavailable and cannot
be monitored. There will be limited fan related event generation.
Comments: When enabled, this option allows fans to idle or turn off when sufficient thermal
margin is available, decreasing the acoustic noise produced by the system and decreasing system
power consumption. Fans will run as needed to maintain thermal control. The actual decrease in fan
speed depends on the system thermal loading, which in turn depends on system configuration and
workload.
While Quiet Fan Idle Mode is engaged, fan sensors become unavailable and are not monitored by the
BMC.
Quiet Fan Idle Mode does not conflict with Fan PWM Offset (above) – they work in concert, with Fan
PWM Offset applied to fans in Quiet Fan Idle Mode just as when the fans are operating in “normal
mode”. A Fan PWM Offset of zero is necessary for fans to actually stop turning.
Back to [System Acoustic and Performance Configuration
]
12.2.3 Security Screen (Tab)
The Security screen allows the user to enable and set the Administrator and User passwords and to lock out
the front panel buttons so they cannot be used. This screen also allows the user to enable and activate the
Trusted Platform Module (TPM) security settings on those boards that support TPM.
Note that it is necessary to activate the TPM in order be able to enable Intel
®
Trusted Execution Technology
(TXT) on boards that support it. Changing the TPM state in Setup will require a Hard Reset for the new state to
become effective. For enabling Intel
®
TXT, see the Processor Configuration screen.
This BIOS supports (but does not require) “Strong Passwords” for security. The “Strong Password” criteria for
both Administrator and User passwords require that passwords be between 8 and 14 characters in length, and
a password must contain at least one case-sensitive alphabetic character, one numeric character, and one
special character. A warning is given when a password is set which does not meet the Strong Password
criteria, but the password is accepted.
For further security, the BIOS optionally may require a Power on Password to be entered in early POST in
order to boot the system. When Power On Password is enabled, POST is halted soon after power on while the
BIOS queries for a Power On Password. Either the Administrator or the User password may be entered for a
Power on Password.
To access this screen from the Main screen or other top-level “Tab” screen, press the right or left arrow keys to
traverse the tabs at the top of the Setup screen until the Security screen is selected.