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System BIOS Intel® Server Board Set SE8500HW4
Revision 1.0
Intel order number D22893-001
78
10.3.4 Operating System
The Intel
®
Server Board Set SE8500HW4 BIOS provides another timer that acts after the
processor FRB stages have completed. By enabling this option in the BIOS Setup, the system
BIOS will enable a timer in the BMC with the requested number of minutes. This OS Boot Timer
option is disabled by default. It is the responsibility of the operating system, or application, to
disable this timer once it has successfully loaded.
NOTE: Enabling this option without having an operating system or server management
application installed that supports this feature will cause the system to reboot when the timer
expires. Refer to operating system documentation to confirm this feature is supported.
10.4 Remote Management
The BIOS supports redirection of both video and keyboard via a serial link (COM port). When
console redirection is enabled, local (host server) keyboard input and video output are passed
both to the local keyboard and video connections and to the remote console via the serial link.
Keyboard inputs from both sources are considered valid and video is displayed to both outputs.
Optionally, the system can be operated without a host keyboard or monitor attached to the
system and run entirely via the remote console. Setup and any other text-based utilities can be
accessed via console redirection.
10.4.1 Serial Configuration Settings
When redirecting through a modem (as opposed to a null modem cable), the modem needs to
be configured with the following:
Auto-answer (for example, ATS0=2, to answer after two rings).
No parity, 8-bit data, 1 stop bit (N, 8, 1 mode)
Modem reaction to DTR set to return to command state (e.g., AT&D1).
Not setting the second item will result in the modem either dropping the link when the server
reboots (if AT&D0) or becoming unresponsive to server baud rate changes (if AT&D2).
The option for handshaking must be set to CTS/RTS + Carrier Detect (CD) for optimum
performance. If EMP is sharing the COM port with serial redirection, the handshaking must be
set to Xon/Xoff + CD. With this form of handshaking, the server is prevented from sending video
updates to a modem that is not connected to a remote modem. If this is not selected, video
update data being sent to the modem inhibits many modems from answering an incoming call.
An EMP option utilizing CD should not be used if a modem is not used and the CD is not
connected.
The BIOS supports multiple consoles, some of which are in graphics mode and some in text
mode. The graphics consoles will display the splash logo while the text consoles receive the
redirected text.
The console redirection ends at the beginning of the Legacy OS boot (INT 19h).
The remote console refresh rate depends on the selected Baud rate.