Product guide
36 Board Set Description
37MAXDATA PLATINUM 90004R Server System
Midplane Board
The passive midplane board contains the following features:
• VHDM connectors for the processor/memory subsystem and the I/O subsystem
• An HDM connector that routes the SCSI bus, two IDE busses, and miscellaneous signals
between the I/O board and the SCSI backplane
• Routing of four scalability ports
• 48 V power distribution
• 12 V standby distribution
• 3.3 V standby distribution
• 12 V distribution from the SCSI backplane board to the I/O board and power distribution board
• Blind-mate power distribution board connector
• Blind-mate front panel connector
Front Panel Board
The front panel board contains switches, LEDs, and the speaker for system interface.
SCSI Backplane Board
The SCSI backplane board supports three LVDS hard drives. Its features include:
• Three SCA connectors for hot-swap 1-inch SCSI hard drives
• One blind-mate connector for dockable slim-line IDE LS240 device
• One blind-mate connector for dockable slim-line IDE DVD or CD device
• SCSI accessed fault-tolerant enclosures (SAF-TE) logic
• 48 V to 12 V integrated DC-to-DC converter
• 12 V to 5 V integrated DC-to-DC converter
• 5 V to 2.5 V linear regulator
Peripherals
The server connects to supported peripheral devices through interfaces located on the I/O Board.
The Super I/O on this board provides four USB ports, an Ethernet port, a serial port, an external SCSI
connector (optional),
a VGA video output port, and in and out ICMB connectors (optional). .
External SCSI Connector (Optional)
An external SCSI connector is available as an option. A cable runs from the I/O board to the external
SCSI connector installed on the back panel.
The I/O board contains two Ultra320 compliant SCSI channels. One channel is used internally while
the other is for external system use. While the internal channel supports only Low Voltage Differential
(LVD) signaling, the external channel supports both LVD and SE (single-ended) signaling. With LVD
signaling, the channels can each support a maximum data rate of 320 MB/sec.
NOTE
The internal SCSI signal is routed to the midplane board’s disk bay connector to interface with internal
SCSI devices. There is an optional connector on that bus that allows an external SCSI controller to
drive the internal bus.