System Overview 1-11
Boardset Features
(continued)
Feature
Description
FSB terminator
module
This module plugs into any unpopulated Slot 2 connector on either processor
mezzanine board. The module terminates the FSB GTL+ signals of the
Slot 2
connector when a processor S.E.C. cartridge is not installed in a connector.
Cache coherency
filters
The cache coherency filters contain information on each of the two processor buses,
thus enabling each bus to perform with minimal snoop cycles. The profusion carrier
requires that these filters be populated if the server has two processor mezzanine
boards that are both populated with processors.
PHP I/O carrier
Ten hot-pluggable 64-bit PCI expansion slots (six at 33
MHz, four at 66 MHz).
Integrated Cirrus Logic
†
GD5446 VisualMedia
†
PCI super video graphics array
(SVGA) controller with 2 MB of video memory.
The Symbios 53C896 LVDS SCSI controller supports two LVDS channels. One
channel is used internally to provide support for the internal SCSI drives (connected to
the LVDS hot-swap disk backplane) and CD-ROM or tape drive. The second LVDS
channel is routed to the rear of the chassis to support external devices.
The diskette controller supports one drive.
The PCI-enhanced Integrated Drive Electronics (IDE) interface supports one IDE
bus.
PS/2-compatible keyboard/mouse controller.
Two universal serial bus (USB) ports.
I/O riser board
This board contains all legacy I/O connections; it plugs into an edge connector on the
PHP I/O carrier.
PS/2-compatible keyboard and mouse ports (interchangeable).
PS/2-compatible parallel port.
Analog VGA, 15-pin video port.
Two PS/2-compatible, 9-pin serial ports.
LVDS hot-swap
disk backplane
This backplane supports hot-swapping of up to two SCA2-type SCSI drives, mounted
in carriers, in and out of the hot-swapping bays.
Front panel board
The front panel board provides the user interface to the server. The board allows
other servers to communicate with this server, even while power is down, via an
Interchassis Management Bus (ICMB).
Push-button switches control power-up, reset, and nonmaskable interrupt
(NMI)
functions.
LEDs indicate power on, power supply failure, hard drive failure, or a fan or other
server cooling failure.
An LCD panel provides information about boot status, available number of processors,
and other server management information.
Midplane
The midplane:
•
Electrically connects the PHP I/O and profusion carriers
•
Contains the sockets for the memory modules
•
Distributes DC power to the PHP I/O and profusion carrier, disk backplane, cooling
fans, memory boards, and front panel board
•
Distributes the power load of the server among two or three 750-watt autoranging
power supplies
Summary of Contents for Express5800/180Rb-7
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