Intel® Server Board S3420GP TPS Functional
Architecture
Revision 2.4
Intel order number E65697-010
27
During the pre-boot phase, the BIOS automatically supports the hot addition and hot removal of
USB devices and a short beep is emitted to indicate such an action. For example, if a USB
device is hot plugged, the BIOS detects the device insertion, initializes the device, and makes it
available to the user. During POST, when the USB controller is initialized, it emits a short beep
for each USB device plugged into the system as they were all just “hot added”.
Boards and systems based on the Intel
®
Server Board S3420GPLX or S3420GPLC are
designed to indicate USB readiness by a series of beep codes during POST, before video
becomes available. These beeps indicate that the USB is powered and initialized. Devices such
as a pen drive or USB CD/DVD ROM drive attached to external USB port will generate a beep
code once the device is recognized, powered and initialized. These beep codes do not signal
any error. They signal USB and external device readiness during POST.
Only on-board USB controllers are initialized by BIOS. This does not prevent the operating
system from supporting any available USB controllers including add-in cards.
3.4.3.2 Legacy USB Support
The BIOS supports PS/2 emulation of USB keyboards and mouse. During POST, the BIOS
initializes and configures the root hub ports and searches for a keyboard and/or a mouse on the
USB hub and then enables the devices that are recognized.
3.5
Optional Intel
®
SAS Entry RAID Module AXX4SASMOD
The Intel
®
Server Board S3420GPLX provides one 50-pin PCI Express* connector (J2H1) for
the installation of an optional Intel
®
SAS Entry RAID Module AXX4SASMOD. Once the optional
Intel
®
SAS Entry RAID Module AXX4SASMOD is detected, the x4 PCI Express* links from the
PCI switches to the 50-pin PCI Express* connector. The optional Intel
®
SAS Entry RAID Module
AXX4SASMOD includes a SAS1064e controller that supports x4 PCI Express* link widths and
is a single-function PCI Express* end-point device.
The SAS controller supports the SAS protocol as described in the Serial Attached SCSI
Standard, version 1.0, and also supports SAS 1.1 features. A 32-bit external memory bus off the
SAS1064e controller provides an interface for Flash ROM and NVSRAM (Non-volatile Static
Random Access Memory) devices.
The optional Intel
®
SAS Entry RAID Module AXX4SASMOD provides four SAS connectors that
support up to four hard drives with a non-expander backplane or up to eight hard drives with an
expander backplane.
4 ports full featured SAS/SATA hardware RAID through optional Intel
®
Integrated RAID Module
SROMBSASMR (AXXROMBSASMR), provides RAID 0, 1, 5, 6 and striping capability for spans
10, 50, 60.
3.6
Integrated Baseboard Management Controller
The Intel
®
Server Board S3420GPLX and Intel
®
Server Board S3420GPLC have the integrated
baseboard management controller, but Intel
®
Server Board S3420GPV does not have the
integrated baseboard management control.
