Installation Guide, Third Edition - Server Expansion Unit

Chapter 4
Cabling and Power Up
MP Core I/O Connections
82
MP Core I/O Connections
Each Server Expansion Unit has two core I/O cards installed and each core I/O card has a management
processor (MP). This allows two partitions to operate, or allows for MP core I/O redundancy in a single
partition configuration. Each MP core I/O board is oriented horizontally and accessed from the back of the
server.
IMPORTANT The MP LAN, local and remote console ports are never functional for a core I/O card installed
in the Server Expansion Unit. See Figure 4-40 for details.
The system LAN and UPS ports are not functional until the operating system is configured and
running.
Figure 4-40 Server Expansion Unit Core I/O Ports
External connections to the core I/O board include the following:
• One Ultra3 (160Mb/second) 68-pin SCSI port—A connection for external SCSI devices (by way of a
VHDCI connector). VHDCI is an industry-standard term that stands for Very High-Density Cable
Interconnect.
• One RJ-45 style 10Base-T/100Base-T/1000Base-T system LAN connector—This LAN uses standby power
and is active when AC is present and the front panel power switch is off.
• One RJ-45 style 10Base-T/100Base-T MP LAN connector—This LAN port is not functional when the core
I/O is installed in the Server Expansion Unit.
• Three RS-232 connectors provide connections for a local console, remote console, and a UPS.
UPS port—A system serial port for connection to a UPS or another system application. The port is located
on the right side of the core I/O card near the external SCSI connector.
Remote console port—This remote serial port is not functional when the core I/O is installed in the Server
Expansion Unit.
Local console port—This local serial port is not functional when the core I/O is installed in the Server
Expansion Unit.
Internal connections for the core I/O board include the following:
• Three single-ended (SE) internal SCSI buses for internal devices. These buses are routed to the system
board where they are cabled to a mass storage backplane.
Local
Console
MP
LAN
Remote
Console
These three ports
are not functional
for a core I/O
installed in a
Server Expansion
Unit.
System
LAN
UPS
SCSI