C H A P T E R  1

Sun Fire X4250 Server Overview

This chapter provides an overview of the features of the Sun Fire X4250 Server.

The following information is included:

1.1 Product Description

The Sun Fire X4250 Server is an enterprise-class two-socket rackmount x64 system powered by either a Dual-Core or Quad-Core Intel® Xeon® processor, packing high performance and room for growth with six PCIe slots and 16 DIMM slots into a compact 2-RU footprint.

The product features are listed in TABLE 1-1.

TABLE 1-1 Sun Fire X4250 Server System Features


Description (Sun Fire X4250)


  • Quad-Core Intel Xeon processor 5400 series

or Dual-Core Intel Xeon processor 5200 series

  • Supports up to 2 processors (8 CPU cores) with 2 Intel processor sockets (dual core or quad core)


  • 16 slots for FB-DIMMS: Up to 64 GB (16 x 4 GB) of PC2-5300 667 MHz ECC fully buffered FB-DIMM memory

Ethernet ports

4 ports, 10/100/1000 Mbps, auto-negotiating through two separate controllers

Internal drives

  • Up to 16 SAS disk drives, SFF SAS 73-GB or 146-GB 2.5-inch form factor (hard drives). Up to 8 SSDs maximum plus 8 additional hard drives.
  • Support for hardware-embedded RAID 0 (striping) and RAID 1 (mirroring)
  • Optional RAID Levels 0, 1, IE, 5, 5EE, 6, 10, 50, 60 with SAS drives

Removable media

1 slimline DVD drive, supporting CD-R/W, CD+R/W, DVD-R/W, DVD+R/W

USB ports

5 USB 2.0 ports: 2 in front, 2 in rear, plus 1 internal USB port

Service ports

  • 1 RJ-45 serial management port (SER MGT)
    (default connection to access service processor)
  • 1 10-MB network management port (NET MGT)
    (to access service processor)
  • HD-15 VGA video port


  • 6 hot-swappable system fan modules (2 fans per module)
  • An air duct facilitates processor/memory airflow

PCI interfaces

6 standard low-profile PCIe slots on three riser boards


  • AC power: 100-120/200-240 V AC, 12/6 A, 50-60 Hz
  • 1 or 2 hot-swappable 1100W power supply units (PSUs) to provide N+N redundancy, with energy efficient design

Remote management

On-board integrated LOM service processor providing:

  • DMTF CLP-based Command Line Interface (CLI) over SSH
  • Web-based browser interface GUI over HTTPS
  • IPMI 2.0
  • SNMP (v1, v2c, and v3)
  • Remote graphical access (remote KVM) over Ethernet
  • Remote storage over Ethernet

Operating system

Solaristrademark 10, Update 5 or later.

Solaris 10 OS with specific Sun Fire X4250 software components


bullet Red Hat Enterprise Linux 4 U5 (AS) (32-bit/64-bit) or later

bullet Red Hat Enterprise Linux 5 (32-bit/64-bit) or later

bullet SUSE Linux Enterprise Server 10 SP1 (64-bit) or later

bullet VMware ESX 3.0.2 or later

bullet Windows Server 2003 (32-bit/64-bit) SP2 or greater (Standard Edition/ Enterprise Edition)

Note - OSes change frequently. Refer to your product web page for updates.

Other software

Javatrademark Enterprise System with a 90-day trial license

1.2 Sun Fire X4250 Server Chassis Overview

The Sun Fire X4250 Server is based on an all-new chassis family.

1.2.1 Infrastructure Boards

The Sun Fire X4250 has the following boards installed in the chassis. The boards are listed in TABLE 1-2.

TABLE 1-2 Infrastructure Boards






The motherboard includes CPU modules, slots for 16 DIMMs, memory control subsystems, and the SP service processor (ILOM) subsystem.

The service processor (integrated LOM) subsystem controls the host power and monitors host system events (power and environmental). The integrated LOM controller draws power from the host’s 3.3V standby supply rail, which is available whenever the system is receiving AC input power, even when the system is turned off.

Section 4.6, Servicing the Motherboard Assembly

Refer to the Sun Fire 4150, 4250 and 4450 Diagnostic Guide for iLOM sensor information.

Power distribution board


This board distributes main 12V power from the power supplies to the rest of the system. It is directly connected to the paddle card, and to the motherboard via a bus bar and ribbon cable. It also supports a top cover interlock (“kill”) switch.

In the Sun Fire X4250, the power supplies connect directly to the power distribution board.

Section 5.5, Servicing the Power Distribution Board (PDB)

Paddle card


This board serves as the interconnect between the power distribution board and the fan power boards, drives backplane, and I/O board.

Section 5.7, Servicing the Paddle Card

Fan power boards (2)


These boards carry power to the system fan modules. In addition, they contain fan module status LEDs, and transfer I2C data for the fan modules.

Section 5.1, Servicing the Fan Power Boards

Drives backplane


This board includes the connectors for the drives, as well as the interconnect for the I/O board, Power and Locator buttons, and system/component status LEDs. The Sun Fire X4250 has a 16-disk backplane. Each drive has an LED for power/activity, fault, and ok-to-remove.

Section 5.3, Servicing the Drives Backplane

Front I/O board


This board carries the front panel USB connections from the drives backplane. The board connects directly to the drives backplane. It is packaged with the DVD drive as a single unit.

Section 3.5, Servicing the DVD/USB Module

PCIe risers


In the Sun Fire X4250, each riser supports two PCIe cards. There are three risers per system, each attached to the rear of the motherboard.

Section 4.3, Servicing PCIe Risers

1.2.2 System Cables

The Sun Fire X4250 internal cables are listed in TABLE 1-3. FIGURE 1-1 shows the system cables on the Sun Fire X4250.

FIGURE 1-1 System Cables

Figure showing system cables.

TABLE 1-3 Sun Fire X4250 Server Cables (SAS)




Drive data cables (2)

Between the HBA PCI-Express Card and the drives backplane


Motherboard to PDB cable

Between the power distribution board and the motherboard


Top cover interlock cable

Removes power when cover opens.


PDB ribbon cable

To the power distribution board

1.2.3 Dimensions

The 2U chassis form factor dimensions are listed in TABLE 1-4.

TABLE 1-4 Sun Fire X4250 Server Dimensions


Sun Fire X4250


87.85 mm/3.46 inches


445.71 mm/17.55 inches (includes ears - chassis is 425.46 mm/ 16.75 inches)


733.65 mm/28.88 inches
(includes PSU handle - the chassis is 711.25 mm/28.00 inches)


Maximum: 25.6 kg/56.3 pounds.

1.3 Sun Fire X4250 Server Front Panel Features

FIGURE 1-2 shows front panel features on the Sun Fire X4250.

FIGURE 1-2 Front Panel Features

This figure shows the location of the front panel features on the Sun Fire X4250.

Figure Legend


Locator LED/Locator button (white)


DVD drive


Service Action Required LED (amber)


USB ports (2)


Power/OK LED (green)


Maintenance LEDs:




Power Supply Service Required LED (amber)

System Overtemperature LED (amber)

Fan Module Service Required LED (amber)


Power button


Drive map

1.4 Sun Fire X4250 Server Rear Panel Features

FIGURE 1-3 shows rear panel features on the Sun Fire X4250. For more detailed information about ports and their uses, see the Sun Fire X4450 Server Installation Guide. For a detailed description of PCIe slots, see Section 4.3, Servicing PCIe Risers.

FIGURE 1-3 Rear Panel Features

This figure shows the location of the rear panel features.

Figure Legend




Rear panel system status LEDs

Locator LED/Locator button (white)

Service Action Required LED (amber)

Power/OK LED (green)


PSU 0 slot


Serial management port


PCIe 3 slot


Network management port


PCIe 0 slot


NMI button (Behind panel, not shown)


PCIe 4 slot


Reset button (Behind panel, not shown)


PCIe 1 slot


Gbit Ethernet ports (0, 1, 2, 3)


PCIe 5 slot


USB ports (0, 1)


PCIe 2 slot


HD15 video port

1.5 Illustrated Parts Breakdown

The following illustrations provide exploded views of system components. Use these illustrations, and the accompanying tables, to identify parts in your system.

FIGURE 1-4 I/O Components (Sun Fire X4250)

This illustration shows system I/O components for the server.

Figure Legend


Top cover




Drives backplane


DVD/USB Module


Drives cage


Left control panel light pipe assembly


Right Control Panel Light Pipe Assembly



FIGURE 1-5 Power Distribution/Fan Module Components (Sun Fire X4250)

Figure showing power distribution and fan module components.

Figure Legend


Paddle card


Fan modules


Power distribution board/bus bar assembly


Fan boards


Vertical power distribution board


Air baffle


Power supplies


Note - System cooling might be affected by dust and contaminant build-up. It is recommended that systems be opened and checked approximately every six months, or more often in dirty operating environments. Check system heat sinks, fans, and air openings. If necessary, clean systems by brushing or blowing contaminants or carefully vacuuming contaminants from the system.