MG1450 007 4276 001

User Manual: 007-4276-001

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SGI™ 1450 Server
Maintenance Guide

Document Number 007-4276-001

Cover design by Sarah Bolles, Sarah Bolles Design, and Dany Galgani, SGI Technical Publications.
© 2000, Silicon Graphics, Inc.— All Rights Reserved
The contents of this document may not be copied or duplicated in any form, in whole or in part, without the prior written permission of Silicon
Graphics, Inc.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications.
LIMITED AND RESTRICTED RIGHTS LEGEND
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in the Rights in Data clause at FAR 52.227-14 and/or in
similar or successor clauses in the FAR, or in the DOD, DOE, or NASA FAR Supplements. Unpublished rights reserved under the Copyright
Laws of the United States. Contractor/manufacturer is Silicon Graphics, Inc., 1600 Amphitheatre Pkwy., Mountain View, CA 94043-1351.
Silicon Graphics is a registered trademark and SGI and the SGI logo are trademarks of Silicon Graphics, Inc.
Adaptec is a registered trademark of Adaptec, Inc. Compaq is a trademark of Compaq Computer Corporation. IBM and OS/2 are registered
trademarks of International Business Machines. Intel, LANDesk, and Pentium are registered trademarks and Server Set and Xeon are trademarks
of Intel Corporation. Linux is a registered trademark of Linus Torvalds. Microsoft, MS-DOS, Windows, and WIndows 2000 are registered
trademarks of Microsoft Corporation. UNIX is a registered trademark in the United States and other countries, licensed exclusively through
X/Open Company, Ltd.

Record of Revision

Version

Description

001

June 2000
Initial Rev

007-4276-001

iii

Contents

Figures .

. xi

Tables .

. xiii

About This Guide.

. xv

Obtaining Publications

. xv

Reader Comments .

. xv

Detailed Chassis Description

Chassis Features

Peripherals .

Peripheral Bay.

Device Bay

Media Bay.

Hard Drive Bay

. 10

Power Subsystem .

. 11

System Cooling

. 14

E-Bay

. 17

Chassis Front Controls and Indicators .

. 18

Rear Panel I/O Ports and Features .

. 19

Removing and Installing System Components .
Tools and Supplies Needed .

. 21

. 22

Pre-Installation Safety Precautions .

. 22

Front Cover.

. 23

.
.

Removing the Front Cover .

. 23

Installing the Front Cover

. 24

. 25

Removing the Top Cover

. 25

Installing the Top Cover .

. 25

Top Cover .

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Contents

Memory Retention Bar .

. 26

Removing the Memory Retention Bar .

. 26

Installing the Memory Retention Bar

. 27

Baseboard

. 27

. 28

Installing the Baseboard .

. 31

. 33

Removing a Power Supply Module .

. 35

Installing a Power Supply Module .

. 35

Removing the Power Subsystem Bay

. 36

Installing the Power Subsystem Bay.

. 37

. 38

Removing the Fan Board Assembly .

. 39

Installing the Fan Board Assembly .

. 40

Replacing the Fan Board .

. 40

Removing and Installing Individual Fans .

. 42

Removing the Hard Drive Bay .

. 43

Installing the Hard Drive Bay

. 44

Hard Drive Bay .

Peripheral Devices .

. 45

Installing a Drive in the Media Bay .

. 46

Replacing a Drive in the Device Bay.

. 46

. 47

Removing and Installing Baseboard Components
Tools and Supplies Needed

Removing a Drive from the Media Bay .

SCSI Requirements .

Cooling System .

Removing the Baseboard .
Power Subsystem .

. 49

. 50

Pre-Installation Safety Precautions .

. 50

Baseboard Connector and Component Locations .

. 52

Memory .

. 53

Removing the Memory Module .

. 55

Installing the Memory Module .

. 55

Removing DIMMs .

. 56

Installing DIMMs .

. 56

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Contents

Processors .

. 57

Removing a Processor

. 59

Installing a Processor .

. 59

Removing Processor Retention Mechanisms .

. 59

Installing Processor Retention Mechanisms

. 60

Installing Processor Handles

. 60

Installing Processor Heatsinks .

. 60

Voltage Regulator Modules (VRMs).

. 61

Removing a VRM .

. 62

Installing a VRM .

. 62

. 63

Backup Battery .

Add-in Boards .

. 65

Removing a 32-bit, 33-MHz Half-Length PCI Add-in Board

. 65

Installing a 32-bit, 33-MHz Half-Length PCI Add-in Board .

. 66

Removing a 64-bit, 66/33-MHz Hot-Plug PCI Add-in Board

. 67

Installing a 64-bit, 66/33-MHz Hot-Plug PCI Add-in Board.

. 69

. 70

Installing an ICMB Card .

. 71

Removing an ICMB Card

. 73

. 75

ICMB Card .

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Solving Problems .

Resetting the System .

. 75

Initial System Startup .

. 75

New Application Software

. 76

After the System Has Been Running Correctly.

. 77

vii

Contents

Specific Problems and Corrective Actions .

. 77

Power Light Does Not Light .

. 78

No Beep Codes.

. 78

No Characters Appear on Screen

. 79

Characters Are Distorted or Incorrect .

. 79

System Cooling Fans Do Not Rotate Properly .

. 80

Diskette Drive Activity Light Does Not Light .

. 80

Hard Drive Activity Light Does Not Light .

viii

. 81

CD-ROM Drive Activity Light Does Not Light

. 81

Problems with Application Software

. 81

Error and Informational Messages

. 82

Equipment Log .

. 84

Technical Reference .

. 87

Internal Cables and Connectors .

. 87

Connectors Accessible to the User

. 90

Keyboard and Mouse Ports .

. 90

Serial Ports .

. 90

Parallel Port

. 91

Video Port .

. 92

Universal Serial Bus (USB) Interface.

. 93

ICMB Connectors .

. 94

Ethernet Connector

. 94

Internal SCA-2 HDD Connector .

. 95

External Adaptec Ultra 160/m SCSI.

. 97

AC Power Input

. 99

Peripheral Adapter Boards and Connectors.

100

CD-ROM Connectors .

100

Floppy Connectors

103

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Contents

Baseboard Connectors

.105

Power Distribution Board Interface Connectors (J9B1, J9D1, J9B2) .

.107

Front Panel Interface (J9E3) .

.
.

.111

Hot-Plug PCI Indicator Board Interface (J3D1)

.113

Memory Module Interface (J6F1)

.115

Processor Module Connector (J7A1, J7B1, J7C1, J7D1)

.119

Processor Termination, Regulation, and Power .

.123

Termination Card .

.125

Server Monitor Module Connector (J7H1) .

.125

SM Bus Connector (J9E4).

.127

ICMB Connector (J1D2) .

.127

Auxiliary I C Connector (J9E4) .

.128

Baseboard Fan Connectors (J3C1, J3A1, J4A1, J4C1) .

.128

Internal Disk Drive LED Connection .
Baseboard Jumpers

.130

.131

Changing Jumper Settings

.133

CMOS Clear Jumper .

.133

Password Clear Jumper .

.135

Recovery Boot Jumper

.136

Interrupts .

.137

Video Modes

.138

Physical Environment Specifications .

.141

.143

Index

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Figures

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Figure 1-1

Server in Rack-Mountable Configuration

Figure 1-2

Front Cover Retaining Screws

Figure 1-3

Top Cover Thumbscrew .

Figure 1-4

(Left) Server without Covers. (Right) Overhead View of E-Bay .

Figure 1-5

Hard Drive in Drive Carrier .

. 10

Figure 1-6

Power Subsystem .

. 12

Figure 1-7

Fan Board Assembly .

. 15

Figure 1-8

Fan LEDs

. 16

Figure 1-9

Front Panel Controls and Indicators .

. 18

Figure 1-10

Rear Panel I/O Ports and Features .

. 19

Figure 2-1

Memory Retention Bar.

. 27

Figure 2-2

Power Supply AC Bracket .

. 29

Figure 2-3

E-Bay Retaining Screws

. 30

Figure 2-4

Rear Retention Mechanism

. 31

Figure 2-5

Power Subsystem .

. 34

Figure 2-6

Metal Plate Covering the Power Subsystem Bay

. 38

Figure 2-7

Fan Board Assembly Screw

. 39

Figure 2-8

Fan Assembly Rotated away From Its Base .

. 41

Figure 2-9

Hard Drive Bay Tabs .

. 43

Figure 2-10

Removing the Hard Drive Bay from the Chassis

. 44

Figure 2-11

Location of the Media Bay Screw .

. 45

Figure 3-1

Baseboard Connector and Component Locations .

. 52

Figure 3-2

Memory Module DIMM Installation Sequence .

. 54

Figure 3-3

DIMM Orientation in a Memory Module

. 57

Figure 3-4

Processor Orientation and Components .

. 58

Figure 3-5

Installing a VRM

. 63

Figure 3-6

Front Hot-Plug Retention Mechanism

. 68

.
.

.
.
.

.
.

Figures

xii

Figure 3-7

ICMB Card .

. 71

Figure 3-8

Example of an ICMB Card Attached to a Chassis

. 72

Figure 3-9

Internal Cable Attached to the ICMB Card .

. 72

Figure 3-10

External Cable Attached to the Card .

. 73

Figure A-1

Detailed Diagram of Connector Locations

105

Figure A-2

Baseboard Configuration Jumpers

131

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Tables

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Table 1-1

SGI 1450 Server Physical Specifications .

Table 1-2

Chassis Feature Summary .

Table 1-3

Hard Drive LED State Status .

. 11

Table 1-4

AC Power LED State Status .

. 14

Table 1-5

Fan LED State Status .

. 16

Table 3-1

VRM/Processor Power Sequencing .

. 61

Table 3-2

Processor/VRM Population Sequencing

. 61

Table 4-1

Resetting Commands .

. 75

Table 4-2

Standard BIOS Port-80 Codes .

. 82

Table 4-3

Recovery BIOS Port-80 Codes.

. 83

Table 4-4

Equipment Log .

. 84

Table A-1

SGI 1450 server Cables and Connectors .

. 87

Table A-2

Keyboard and Mouse Connectors

. 90

Table A-3

Serial Ports .

. 91

Table A-4

Parallel Port .

. 91

Table A-5

Video Port .

. 92

Table A-6

USB Connector .

. 93

Table A-7

ICMB Connectors .

. 94

Table A-8

Ethernet Connector.

. 94

Table A-9

Internal SCA-2 HDD Connector .

. 95

Table A-10

External Adaptec Ultra 160/m SCSI .

. 97

Table A-11

CD-ROM Adapter Board 40 Position IDE Connector .

.100

Table A-12

CD-ROM Adapter Board Power Connector .

.101

Table A-13

Audio Connector

.101

Table A-14

CD-ROM JAE Connector .

.101

Table A-15

34-Position Floppy Connector Pin-Out .

.103

Table A-16

Floppy Adapter Board Power Connector

.104

xiii

Tables

xiv

Table A-17

FFC connector

104

Table A-18

Connector Description .

106

Table A-19

Main Power Connector A (J9B1) .

108

Table A-20

Main Power Connector B (J9D1) .

109

Table A-21

Auxiliary Power Connector (J9B2)

110

Table A-22

Front Panel Connector (J9E3) .

111

Table A-23

Hot-Plug Indicator Board Connector Pinout (J3D1) .

114

Table A-24

Memory Module Interface .

115

Table A-25

Processor Card Connector (J7A1, J7B1, J7C1, J7D1) .

119

Table A-26

Processor VRM Connectors (J2A2, J2B1, J2C1) .

123

Table A-27

Server Monitor Module Connector Pinout .

126

Table A-28

SM Bus Connector (J9E4) .

127

Table A-29

ICMB Connector (J1D2).

128

Table A-30

IMB Connector (J8F1) .

128

Table A-31

Processor Fan Connector #1 (J3C1)

129

Table A-32

Processor Fan Connector #2 (J3A1)

129

Table A-33

Processor Fan Connector #3 (J4A1)

130

Table A-34

Processor Fan Connector #4 (J4C1)

130

Table A-35

Internal Disk Drive LED Connector .

130

Table A-36

Configuration Jumper Settings

132

Table A-37

Configuration of Jumpers .

132

Table A-38

Beep Codes .

136

Table A-39

Interrupt Definitions

137

Table A-40

Standard VGA Modes .

138

Table B-1

Environmental Specifications .

141

.
.

007-4276-001

About This Guide

This guide contains a detailed description of the SGI™ 1450 server chassis and provides
information on removing and installing field-replaceable components.
The information in this guide is intended for trained service personnel.
The following topics are covered:
•

Detailed Chassis Description

•

Removing and Installing System Components

•

Removing and Installing Baseboard Components

•

Solving Problems

See the SGI 1450 Server User’s Guide for information on installing customer-replaceable
components and configuring software and utilities.
See the SGI 1450 Server Mounting Instructions for instructions on mounting the SGI 1450
server in a 19-inch rack.
See the SGI 1450 Server Quick Start Guide for information on setting up your system.

Obtaining Publications
To obtain SGI documentation, go to the SGI Technical Publications Library at
http://techpubs.sgi.com.

Reader Comments
If you have comments about the technical accuracy, content, or organization of this
document, please tell us. Be sure to include the title and document number of the manual

007-4276-001

About This Guide

with your comments. (Online, the document number is located in the front matter of the
manual. In printed manuals, the document number can be found on the back cover.)
You can contact us in any of the following ways:
•

Send e-mail to the following address:
techpubs@sgi.com

•

Use the Feedback option on the Technical Publications Library World Wide Web
page:
http://techpubs.sgi.com

•

Contact your customer service representative and ask that an incident be filed in the
SGI incident tracking system.

•

Send mail to the following address:
Technical Publications
SGI
1600 Amphitheatre Pkwy., M/S 535
Mountain View, California 94043-1351

•

Send a fax to the attention of “Technical Publications” at +1 650 932 0801.

SGI values your comments and will respond to them promptly.

xvi

007-4276-001

Chapter 1

1. Detailed Chassis Description

This chapter provides a detailed description of chassis features. For a general
description, see the SGI 1450 Server User’s Guide.
The following sections are covered:

007-4276-001

•

Chassis Features

•

Peripherals

•

Hard Drive Bay

•

Power Subsystem

•

System Cooling

•

E-Bay

•

Chassis Front Controls and Indicators

•

Rear Panel I/O Ports and Features

1: Detailed Chassis Description

Chassis Features
The SGI 1450 server is designed either to be mounted in a standard 19-inch rack (rack
mode) or to stand upright (pedestal mode). Table 1-1 shows the physical specifications
for the SGI 1450 server in rack mode.
For instructions on mounting the SGI 1450 server in a 19-inch rack, see the SGI 1450
Server Mounting Instructions.
Table 1-1

SGI 1450 Server Physical Specifications

Specification

Rack Mode

Height

4u (7 inches)

Width

17.5-inch rack

Depth

26.5 inches

Weight

57 lbs (26 kg), minimum configuration
88 lbs (40 kg), maximum configuration

Required front clearance

3 inches (inlet air temperature <35 °C / 95 °F)

Required rear clearance

6 inches (no airflow restriction allowed)

Required side clearance

1 inch

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Chassis Features

Figure 1-1 shows an SGI 1450 server in rack-mountable configuration.

A
B

C
D
Figure 1-1

Server in Rack-Mountable Configuration

A. Top cover. The top cover protects the contents of the chassis.
B. Front cover. The front cover protects the peripheral devices.
C. Front bezel door. When this door is open, you can access hard drives and peripheral
devices.
D. Front bezel.

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1: Detailed Chassis Description

The chassis has two covers: a front cover and a top cover. The front cover is held in place
by three screws. The screws are noted by “A” in Figure 1-2.

Figure 1-2

Front Cover Retaining Screws

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Chassis Features

The top cover is held in place by two thumbscrews, each located at the top rear corner of
the chassis. One of two thumbscrews is noted by “A” in Figure 1-3.
A

Figure 1-3

Top Cover Thumbscrew

A bezel snaps on to the front of the chassis and allows adequate airflow to cool the system
components. The door in the bezel provides user access to hard drives and the peripheral
bay. Access to the power supplies is provided by removing the front bezel completely.

007-4276-001

1: Detailed Chassis Description

Figure 1-4 gives an overhead view of the system with the top cover and front bezel
removed.

E
D

E3
E7

E2
E5
C

B
E4

F
G

Figure 1-4

(Left) Server without Covers. (Right) Overhead View of E-Bay

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Chassis Features

Table 1-2 summarizes the SGI 1450 server features, using the callouts provided in
Figure 1-4.
Table 1-2

Chassis Feature Summary

Feature

Description

A.Peripheral Bay

A peripheral bay in the front of the system has a 5.25-inch device bay
and a media bay.

[A1 and A2]
A1. Peripheral Bay:
Device Bay

The device bay can hold a 5.25-inch CD-ROM or DAT device.

A2. Peripheral Bay:
Media Bay

The media bay holds a 0.5-inch slim-line floppy drive and a 0.5-inch
slim-line CD-ROM drive.

B. Hard Drives

The hard drive bay supports up to five 1.0-inch hot-swap Ultra 160
SCSI hard drives.
If the operating system supports hot-swapping of hard drives, these
drives can be changed without shutting down the server.

C. Power Subsystem

Installed:
A power subsystem bay that supports up to three 350-watt power
supply modules in a (2+1) redundant configuration.
The power subsystem bay is mounted at the front-left corner of the
chassis and is shipped with three power supply modules.
Each power supply can be changed without shutting down the server.

D. Cooling

Installed:
Fan board assembly and six fans in a redundant (5+1) fan array. The
fans cool the baseboard and other components.
In a 5+1 configuration, a failed fan may be removed and installed
without shutting down the server. This process is called
hot-swapping. Hot-swapping fans can only be performed by a
qualified service technician.

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1: Detailed Chassis Description

Table 1-2 (continued)

Chassis Feature Summary

Feature

Description

E. Electronics Bay
(E-Bay)

The E-Bay contains the baseboard. The baseboard has the following
major components:
Up to four Intel® Pentium® III Xeon™ processors
Server Set™ III HE chipset
Up to sixteen PC/100-compliant registered ECC SDRAM memory
modules that support up to 16 gigabytes of Error Checking and
Correcting (ECC) Synchronous Dynamic RAM
32-bit, 33-MHz, 5V PCI segment with two expansion slots and three
embedded devices
64-bit, 66/33-MHz, 3.3V hot-plug PCI segment with two expansion
slots and one embedded device
64-bit, 33-MHz, 5V hot-plug PCI segment with four expansion slots
and three embedded devices
Compatibility bus segment with three embedded devices
Two externally accessible USB ports
One IDE connector, supporting up to two ATA33 compatible devices
One Adaptec® AIC-7880 SCSI controller
One Adaptec AIC-7899 SCSI controller
The processors, SDRAM memory modules, and hot-plug PCI
components are listed individually below.

E1. Processors

The system supports up to four Intel Pentium III Xeon processors.

E2. Registered SDRAM The memory expansion board holds up to sixteen Dual Inline
Memory Expansion
Memory Module (DIMM) slots and supports up to 16 gigabytes of
Slots
Error Checking and Correcting (ECC) Synchronous Dynamic RAM.
E3. PCI Add-In Slots

The baseboard contains two 32-bit 33-MHz non-hot-plug PCI slots.
These boards are half-length boards only.

E4. PCI Hot-Plug Slots

The baseboard contains six hot-plug PCI slots. You can add, remove,
or exchange a PCI add-in board from any hot-plug slot without
shutting down the server.
NOTE: At this time, the Linux® operating system does not
support use of the PCI hot-plug (PHP) feature. If you are running
Linux, your system must be turned off before installing or
removing PCI boards. Windows 2000 requires drivers that are
PHP compatible in order to use the PHP feature.

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Peripherals

Table 1-2 (continued)

Chassis Feature Summary

Feature

Description

E5. Baseboard

Form-factor, 16 (13 inches, ATX-style backpanel I/O)
The baseboard is mounted horizontally in a subassembly called the
E-Bay. The E-Bay is mounted towards the rear of the chassis.
The baseboard contains connectors for installing up to four Pentium
III Xeon processors in single-edge contact (SEC) cartridges.

E6. Voltage Regulator
Module (VRM)

The baseboard contains three embedded VRMs and connectors to
add three additional VRMs.

E7. Lithium Battery

This battery is used to power the system clock.

F. Front

This side is called the front of the E-Bay.

G. Right

This side is called the right of the E-Bay.

H. Back

This side is called the back of the E-Bay.

I. Left

This side is called the left of the E-Bay.

Peripherals
Peripheral Bay
The chassis contains one peripheral bay for CD-ROM, DAT, and floppy drives. The
peripheral bay contains two smaller bays: a device bay and a media bay.
Device Bay

The device bay accommodates either a 5.25-inch CD-ROM or a DAT drive. We
recommends not installing any device, such as a hard drive, requiring airflow cooling in
the device bay. Installing such a device in this bay causes environmental conditions to
exceed the cooling and electromagnetic interference (EMI) constraints of the system.
Media Bay

The media bay accommodates a 0.5-inch slim line floppy drive and 0.5-inch slim line
CD-ROM drive.

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1: Detailed Chassis Description

Hard Drive Bay
The chassis contains one hard drive bay. The hard drive bay accommodates up to five
3.5-inch by 1.0-inch hot-swap Ultra 160 SCSI SCA hard drives
You can access the hard drives by opening the front bezel door. As part of the hot-swap
implementation, each hard drive requires a hard drive carrier. When you remove a hard
drive from the system, you remove both the carrier and the hard drive. The drive is
attached to the carrier by four screws. The carrier locks into the hard drive bay by a
locking handle. Figure 1-5 shows the orientation of the drive in the carrier. The carrier is
upside down in this figure.

Figure 1-5

Hard Drive in Drive Carrier

A. Hard drive carrier
B. Four fasteners used to attach drive to carrier
C. Hard drive
D. Connector
E. Locking handle

Each hard drive is connected to an Ultra 160 SCSI hot-swap backplane. The backplane
provides industry-standard 80-pin SCA-2 connectors for each hard drive and accepts
10,000 RPM or slower drives that consume up to 23 watts of power. If another type or
slower Ultra 160 SCSI SCA drive is installed, make sure that the drive meets these
backplane and carrier requirements.

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Power Subsystem

An LED above each hard drive displays the status of that hard drive. Table 1-3 shows the
hard drive LED status.
Table 1-3

Hard Drive LED State Status

LED State

Status

Solid green

The hard drive is present and powered on.

Flashing green

The hard drive is active.

Solid yellow

There is an asserted fault status on the hard drive.

Flashing yellow

A rebuild of the hard drive is in progress.

Off

The hard drive is not powered on.

The SCSI backplane boardset consists of two separate boards: the SCSI backplane board
and the SCSI-accessed fault-tolerant enclosures specification (SAF-TE) board. The SCSI
backplane board provides power distribution and SCSI interfacing of the hard drives.
The SAF-TE board provides SAF-TE features and hard drive failure indicators.

Power Subsystem
The SGI 1450 server uses a universal input-switching power subsystem (PSBS). This
subsystem provides up to 630 watts DC. The subsystem also minimizes the RMS current
drawn from each AC line by providing power factor corrected AC input. The chassis can
be configured with one, two, or three 350-watt power supply modules. Each module is
designed to minimize electromagnetic interference (EMI) and radio frequency
interference (RFI).

007-4276-001

1: Detailed Chassis Description

Figure 1-6

Power Subsystem

Warning: The total power requirement for the SGI 1450 server exceeds the 240 VA
energy hazard limit that defines an operator-accessible area. Only qualified service
technicians should access the processor, memory, power subsystem, and non-hot-plug
areas of the baseboard.
The power subsystem consists of a power subsystem bay, with up to three power supply
modules. The power supply modules are noted by “A” in Figure 1-6. The power
subsystem bay contains a power distribution board, which manages the power delivered
by all functional power supplies.
The power subsystem can operate in either a nonredundant or redundant manner.
Nonredundant operation means that you are using only one or two power supply
modules. If the module ceases to function normally, the server system cannot function
properly, if at all. A minimal configuration supported by one module is one processor,
four memory DIMMs, one hard drive slower than 10,000 PRM, one floppy drive, and one
CD-ROM.

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Power Subsystem

The SGI 1450 server uses a redundant (2+1) power subsystem. To form a (2+1) redundant
power subsystem, the subsystem parallels the DC output of one power supply module
with one or two other modules. If one module ceases to function normally, the remaining
modules provide power to the server system and the system continues to function
properly. Two power supply modules are required to provide power to a fully configured
SGI 1450 server. The third module provides redundancy. A fully configured system
includes four processors, sixteen gigabytes of memory, one floppy drive, one CD-ROM,
five hard drives, and eight PCI add-in boards.
The baseboard contains three embedded voltage converters: two 5 V input and one 12 V
input. The baseboard also provides three connectors supporting 8.3-compliant, plug-in
voltage regulator modules (VRMs).
Each power subsystem auto-senses within the following voltage ranges and is rated as
follows:
•

100-120 V~ at 50/60 Hertz (Hz); 11.0 A maximum

•

200-240 V~ at 50/60 Hz; 5.5 A maximum

The DC output voltages of each power supply module are:
•

+3.3 V at 28 A max (total combined power of the +3.3 and +5 channels must not
exceed 195 W)

•

+5 V at 32 A max (total combined power of the +3.3 and +5 channels must not
exceed 195 W)

•

+12 V at 12.0 A with 15.0 A peak

•

-12 V at 0.5 A

•

+5 V standby at 2 A whenever AC power is supplied to the server system

The DC output voltages of the power subsystem with two or three modules are:

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•

+3.3 V at 50 A max (total combined power of the +3.3 and +5 channels must not
exceed 351 W)

•

+5 V at 58 A max (total combined power of the +3.3 and +5 channels must not
exceed 351 W)

•

+12 V at 22.0 A with 28.0 A peak

•

-12 V at 0.5 A

•

+5 V standby at 2 A

1: Detailed Chassis Description

DC power is sourced through 20-pin and 24-pin power cables to the baseboard. Remote
sensing signals are provided through one 14-pin auxiliary power cable to the baseboard.
The AC power status of each power supply module is indicated by an LED. The LED is
located on the power supply module. Table 1-4 shows the AC power LED status.
Table 1-4

AC Power LED State Status

LED State

Status

Solid green

AC power is applied to the power subsystem and standby voltage is available.

Off

The LED is off when one of the following conditions occur:
The power supply modules are disabled by the DC enable signal.
The power supply module is disabled by another switch.
The power supply module has been overstressed.
The power supply module has failed and replacement of the unit is necessary.

There are also three standby channels and each has an LED called a standby LED. These
LEDs are located on the right side of the power subsystem bay and each indicates the
status of that standby channel.
Individual power supply modules are hot-swappable. In other words, you can remove
and install a power supply module without shutting down the server. After a power
supply module has been removed from the system, airflow patterns are disrupted within
the system. To maintain correct airflow patterns within the chassis and to ensure that all
components remain within specification under all system environmental conditions,
power supply module hot-swap operations should not exceed two minutes in duration.

System Cooling
The SGI 1450 server uses up to six fans mounted in a fan board assembly in the middle
of the chassis between the E-Bay and peripheral bays. The six fans are noted by “A” in
Figure 1-7.

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System Cooling

Figure 1-7

Fan Board Assembly

The cooling system supports either a non-redundant configuration or a redundant
configuration. A non-redundant configuration includes just three fans. If any one of these
three fans ceases to function normally, environmental conditions within the chassis may
exceed the environmental regulations in this guide and the chassis may not function
normally. Three fans support any system configuration but without fan redundancy.
The SGI 1450 server uses all six fans to form a redundant cooling system. If one of the six
fans ceases to function normally, the remaining five fans adequately cool the system.
Using six fans supports any configuration up to the maximum configuration.
Air flows in through the front bezel over the power subsystem bay, the peripheral bay,
and the hard drive bay. The air then passes through the fan board assembly and the
E-Bay. Finally, the air exhausts through the rear and left side of the chassis.
Individual fan status indicators are located on the fan board mounted in the fan board
assembly. Fan failure is also indicated by the general fault LED located at the front of the
chassis.

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1: Detailed Chassis Description

An LED above each cooling fan displays the status of that fan. The LEDs for two fans are
noted by “A” in Figure 1-8. The LED on the left indicates the status of the fan pointed to
by the left arrow. The LED on the right indicates the status of the fan pointed to by the
right arrow.

Figure 1-8

Fan LEDs

Table 1-5 shows the fan LED state status.

Table 1-5

Fan LED State Status

LED State

Status

Solid amber

There is a fault with the cooling fan or the cooling fan is not present.

Off

The cooling fan is functioning properly.

Caution: The top cover must be on the system for proper cooling.
Individual fans are hot-swappable. In other words, you can remove and install a fan
without shutting down the server. After a fan has been removed from the system, airflow

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E-Bay

patterns are disrupted within the system. To maintain correct airflow patterns within the
chassis and to ensure that all components remain within specification under all system
environmental conditions, fan hot-swap operations should not exceed two minutes in
duration.

E-Bay
The E-Bay contains the baseboard with the following components:
•

Up to four Intel Pentium III Xeon processors. The baseboard has four SC330.1
connectors; each supports a processor. There are also four embedded voltage
regulator modules (VRM) and three VRM 8.3-compliant connectors to support up
to four processors.

•

The Server Set III HE chipset. This includes the HE North Bridge, Open South
Bridge (OSB4), and I/O.

•

Up to sixteen PC/100-compliant registered ECC SDRAM memory modules that
support up to 16 gigabytes of Error Checking and Correcting (ECC) Synchronous
Dynamic RAM.

•

32-bit, 33-MHz, 5 V PCI segment with two expansion slots and three embedded
devices.

•

64-bit, 66/33-MHz, 3.3 V hot-Plug PCI segment with two expansion slots and one
embedded device.

•

64-bit, 33-MHz, 5 V hot-Plug PCI segment with four expansion slots and three
embedded devices.

•

Compatibility bus segment with three embedded devices.

•

Two externally accessible USB ports.

•

One Adaptec AIC-7880 SCSI controller.

•

One Adaptec AIC-7899 SCSI controller.

The Adaptec AIC-7899 SCSI controller has two channels called A and B. Channel A is
connected to the HDD backplane. Channel B is connected to the back of the system to
which external SCSI devices may be connected.
The Adaptec AIC-7880 SCSI controller supports both a legacy wide SCSI device and
legacy narrow SCSI device.

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1: Detailed Chassis Description

Chassis Front Controls and Indicators
Figure 1-9 shows the front panel controls and indicators.
A

B
D0

Figure 1-9

C
D3

Front Panel Controls and Indicators

A. Power on/off button: If you press this button when the system is off, you turn on the
power subsystem. If you press this button when the system is in sleep state, you activate
it. If you hold down the button for more than 4 seconds, you override the ACPI mode
and the power is turned off.
B. Reset button: If you press this button, you reset the system. If you hold down this
button for 4 seconds or more, push on the power button, and then release both the reset
and power buttons within one second of each other, the CMOS will be cleared.

Caution: The CMOS should be cleared only if it has been corrupted.
C. Sleep button: If the operating system supports ACPI and you press this button, the
operating system goes into sleep state (S1). If you press this button during sleep state, the
operating system becomes active. This system does not have a service mode.
D. Front panel LEDs from left to right:
D0. General System Fault LED: Yellow indicates a system failure.
D1. NIC activity LED: Green indicates NIC activity.
D2. HDD activity LED: Green indicates any system hard drive activity.
D3. Main power LED: Solid green indicates the presence of DC power in the server.
Flashing green indicates that the system is in ACPI sleep mode.

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Rear Panel I/O Ports and Features

Rear Panel I/O Ports and Features
Figure 1-10 shows a detailed view of the rear panel I/O ports and features.
O

L K

Figure 1-10

G F

I
J

Rear Panel I/O Ports and Features

A. AC input power connector
B. External SCSI connector ports
C. Hot-plug 64-bit, 33-MHz PCI add-in board slots
D. Hot-plug 64-bit, 66/33-MHz PCI add-in board slots
E. Non-hot-plug 32-bit, 33-MHz PCI add-in board slots
These slots can also accept an Intelligent Chassis Management Bus (ICMB) SEMCONN
6-pin connector in/out
F. Video connector
G. USB ports 0 (upper) and 1 (lower), 4-pin connectors
H. NIC RJ45 connector

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1: Detailed Chassis Description

I. Serial port 2 (COM1), 9-pin RS-232 connector
J. IEEE 1284-compliant, 25-pin bi-directional parallel connector
K. Serial port 1 (COM1), 9-pin RS-232 connector
L. PS/2-compatible keyboard connector
M. PS/2-compatible mouse connector
N. HW push button
O. PCI green and amber LEDs (inside the chassis)

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Chapter 2

2. Removing and Installing System Components

This chapter provides information on removing and installing the following system
components:

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•

Front Cover

•

Top Cover

•

Memory Retention Bar

•

Baseboard

•

Power Subsystem

•

Cooling System

•

Hard Drive Bay

•

Peripheral Devices

2: Removing and Installing System Components

Tools and Supplies Needed
The following tools and supplies will allow you to remove and install all the system
components covered in this chapter:
•

Phillips screwdriver (#1 and #2)

•

Flat head screwdriver (#2)

•

Jumper-removal tool or needle-nosed pliers

•

Antistatic wrist strap and conductive foam pad (recommended)

•

Pen or pencil

•

Equipment log: as new parts are integrated into the system, add information about
them to the equipment log (see “Equipment Log” on page 84). Record the model
and serial number of the system, all installed options, and any other pertinent
information specific to the system. Some of this information may be required when
running the system setup utility (SSU).

Pre-Installation Safety Precautions
The following warnings and cautions apply whenever you remove the top and front
covers of the system. Only a technically qualified person should integrate and configure
the system.

Warning: Hazardous voltage, current, and energy levels are present inside the
power subsystem. There are no user-serviceable parts inside it; servicing should be
done by technically qualified personnel.

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Front Cover

Caution: ESD can damage disk drives, boards, and other parts. It is recommended that
all procedures in this chapter be performed only at an ESD-protected workstation. If one
is not available, provide some ESD protection by wearing an antistatic wrist strap
attached to chassis ground—any unpainted metal surface—on your system when
handling parts.

Caution: Always handle boards carefully. They can be extremely sensitive to ESD. Hold
boards only by their edges. After removing a board from its protective wrapper or from
the system, place it component-side UP on a grounded, static-free surface. If you place
the baseboard on a conductive surface, the battery leads may short out. If they do, this
will result in a loss of CMOS data and will drain the battery. Use a conductive foam pad
if available but not the board wrapper. Do not slide the board over any surface.

Caution: For proper cooling and airflow, always install the front cover before turning on
the system. Operating the system for an extended period of time without the top and
front covers in place can damage system parts.

Caution: If the SGI 1450 server is turned on and has only three fans installed, make sure
that you install the top cover within five minutes of removing it.

Front Cover
Follow the instructions in this section to remove and install the front cover.

Removing the Front Cover
To reach components inside the system, remove the front cover, and in some cases the
front bezel. Facing the front of the system, the front cover is on top and towards the front
of the rack-mounted chassis. See Figure 1-1 on page 3 for the location of the front cover.
The following tasks require removal of the front cover:
•

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Removing and installing non-hot-swap drives in the media bay

2: Removing and Installing System Components

•

Removing and installing media devices in the device bay

•

Removing and installing the fan board assembly

•

Removing and installing the power subsystem bay

•

Removing and installing a power supply module (front bezel only)

To remove the front cover, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the front bezel by gently pulling it towards you. The ball studs will release
from the chassis.
3. Remove the three screws located on the top of the chassis. These screws are noted by
“A” in Figure 1-2 on page 4. Save these screws; you need them later to reattach the
cover.
4. Using an even pull and pressing down, slide the cover back towards the front of the
chassis about 0.75 inch.
5. Lift the front cover up and out of the chassis.

Installing the Front Cover
To install the front cover, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Before replacing the front cover, check that no loose tools or parts were left inside
the system.
3. Check that cables and other components are properly installed.
4. Position the cover over the chassis so that the rows of tabs align with slots in the
chassis. Slide the cover toward the back of the system until the tabs on the cover
firmly engage in the chassis.
5. Attach the cover to the chassis with the three screws removed earlier, and tighten
them firmly.
6. Install the bezel by gently applying pressure towards the chassis. The ball studs
snap into the chassis.

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Top Cover

Top Cover
Follow the instructions in this section to remove and install the top cover.

Removing the Top Cover
To reach components inside the system, remove the top cover. Facing the front of the
system, the top cover is on top and towards the back of the rack-mounted chassis. See
Figure 1-1 on page 3 for the location of the top cover. The following tasks require removal
of the top cover:
•

Accessing baseboard components including but not limited to non-hot-plug PCI
add-in boards, extension boards, memory slots, Voltage Regulator Modules
(VRMs), and processors

•

Exchanging individual fans

•

Removing and installing the fan board assembly

•

Removing and installing the power subsystem bay

To remove the top cover, perform the following steps.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Release the two thumbscrews located on the top rear of the chassis. One of two
thumbscrews are noted by “A” in Figure 1-3 on page 5.
3. Using an even pull, press lightly on the top cover and slide it back until it stops.
4. Lift the entire cover upward and away from the chassis.

Installing the Top Cover
To install the top cover, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Before replacing the top cover, check that no left loose tools or parts were left inside
the system.
3. Check that cables, add-in boards, and other components are properly installed.

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2: Removing and Installing System Components

4. Position the cover over the chassis so that the rows of tabs align with slots in the
chassis. Slide the cover toward the front of the system until the tabs on the cover
firmly engage in the chassis.
5. Attach the cover to the chassis with the two thumbscrews released earlier, and
tighten them firmly.
6. Connect any external cables.

Memory Retention Bar
When accessing baseboard components, you need to remove and install the memory
retention bar.

Removing the Memory Retention Bar
To remove the memory retention bar, follow these steps:
1.

Unscrew the captive screw located at the front of the E-Bay. The captive screw is
noted by “A” in Figure 2-1.

2. Lift up the bar from the side located at the front of the E-Bay.
3. Release the clip located at the rear of the chassis. The clip is noted by “C” in
Figure 2-1.

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Baseboard

Figure 2-1

Memory Retention Bar

A. Captive screw
B. Memory retention bar
C. Clip at the rear of the chassis

Installing the Memory Retention Bar
1.

Slip slots in the memory retention bar into the clip located at the rear of the chassis.
The clip is noted by “C” in Figure 2-1.

2. Secure the other side of the memory retention bar with the captive screw, as shown
in Figure 2-1.

Baseboard
This section covers the removal and installation of the baseboard, which requires the
removal and installation of baseboard components. The baseboard resides in the E-Bay.
The front, right, back, and left sides of the E-Bay are marked in Figure 1-4 on page 6.

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2: Removing and Installing System Components

Removing the Baseboard
To remove the baseboard, follow these steps:

Caution: The baseboard can be extremely sensitive to ESD and always requires careful
handling. After removing it from the system, place it component-side UP on a
non-conductive, static-free surface to prevent shorting out the battery leads. If you place
the board on a conductive surface, the battery leads may short out. This will result in a
loss of CMOS data and will drain the battery. Do not slide the baseboard over any
surface.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Turn off all peripheral devices connected to the system.
3. Turn off the system power by pressing the power on/off button on the front panel,
and unplug all AC power cords.
4. Label and disconnect all peripheral cables attached to the I/O panel on the back of
the system.
5. Remove the front cover. See “Removing the Front Cover” on page 23.
6. Remove the top cover. See “Removing the Top Cover” on page 25.
7. Remove the foam cover that shields the E-Bay.
8. Remove the fan board assembly. See “Removing the Fan Board Assembly” on
page 39.
9. Remove the memory retention bar. See “Removing the Memory Retention Bar” on
page 26.
10. Remove the memory module. See “Removing the Memory Module” on page 55.
11. Disconnect internal cables to the baseboard. Cables and connectors include:

•

Three ribbon cables at the front of the E-Bay

•

Three power connectors

•

A ribbon cable located next to the non-hot-plug PCI add-in boards at the back of
the E-Bay

•

A 13-pin AUX-IMB connector

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Baseboard

12. Remove the 33-MHz half-length PCI add-in boards. See “Removing a 32-bit,
33-MHz Half-Length PCI Add-in Board” on page 65.
13. Follow these steps to remove the power supply AC bracket:
a.

Release the screw securing the connector. The screw is noted by “A” in
Figure 2-2.

Slide the bracket up and towards the inside of the chassis.

Drape the AC bracket over the left side of the E-Bay assembly.
A

Figure 2-2

Power Supply AC Bracket

A. Screw securing the connector
B. Power supply inlet connector
14. Remove the voltage regulator modules (VRMs). See “Removing a VRM” on page 62.
15. Remove the processors and any termination processors. See “Removing a
Processor” on page 59.
16. Remove the processor retention guides. See “Removing Processor Retention
Mechanisms” on page 59.
17. Remove any hot-plug PCI add-in boards. See the SGI 1450 Server User’s Guide.

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2: Removing and Installing System Components

18. Remove the plastic slot dividers. First, pull up on the end at the front of the E-Bay,
and then slide the other end out of the back panel at the back of the E-Bay.
19. Remove the screws securing the baseboard to the chassis. There should be two of
them.
20. Remove the four screws on the top and bottom edges of the rear subchassis. These
screws attach the E-Bay to the chassis. Two of the four screws are noted as “A” in
Figure 2-3.

Figure 2-3

E-Bay Retaining Screws

21. Pull the E-Bay away from the chassis. As you separate the E-Bay away, make sure
that the power cord does not become wedged between the two parts of the chassis.
22. Remove the rug from the E-Bay.
23. Using needlenose pliers, remove the plastic rear retention mechanism located at the
front of the E-Bay. The rear retention mechanism is noted by “A” in Figure 2-4 on
page 31.
24. Slide the baseboard towards the front of the chassis.
25. Lift the baseboard up and out on the side closest to the baseboard and VRM
connectors.

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Baseboard

Installing the Baseboard
To install the baseboard, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Pull the E-Bay away from the chassis. As you separate the E-Bay away, make sure
that the power cord does not become wedged between the two parts of the chassis.
3. Hold the baseboard on the side closest to the VRM connectors and processors. Slip
the baseboard under the padding on the right side of the E-Bay and then under the
back panel at the rear of the chassis.
4. Using needlenose pliers, install the plastic rear retention mechanism located at the
front of the E-Bay. The rear retention mechanism is noted by “A” in Figure 2-4.

Figure 2-4

Rear Retention Mechanism

5. Place the rug at the bottom of the E-Bay.
6. Slide the E-Bay into the chassis. As you slide the E-Bay in, make sure that the power
cord does not become wedged between the two parts of the chassis.
7. Attach the four screws on the top and bottom edges of the rear subchassis. See
Figure 2-3 on page 30.

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2: Removing and Installing System Components

8. Attach the screws securing the baseboard to the chassis. There should be two of
them.
9. Install the plastic slot divider. First, slide one end into the back panel, and then press
the other end into the chassis.
10. Install any hot-plug PCI add-in boards. See the SGI 1450 Server User’s Guide.
11. Install the processor retention guides. See “Installing Processor Retention
Mechanisms” on page 60.
12. Install the processors and any termination processors. See “Installing a Processor”
on page 59.
13. Install the voltage regulator modules (VRMs). See “Installing a VRM” on page 62.
14. Follow these instructions to install the power supply AC bracket. See Figure 2-2 on
page 29.
a.

Slide the bracket through the back panel from inside the chassis.

Once in place, slide the bracket down into the slot.

Attach the screw securing the bracket, as shown in Figure 2-2 on page 29.

15. Add any 33-MHz half-length PCI add-in boards. See “Installing a 32-bit, 33-MHz
Half-Length PCI Add-in Board” on page 66.
16. Connect internal cables to the baseboard. Cables and connectors include:
•

Three ribbon cables at the front of the E-Bay

•

Three power connectors

•

A ribbon cable located next to the non-hot-plug PCI add-in boards at the back of
the E-Bay

•

A 13-pin AUX-IMB connector

17. Install the memory module. See “Installing the Memory Module” on page 55.
18. Install the memory retention bar. See “Installing the Memory Retention Bar” on
page 27.
19. Install the fan board assembly. See “Installing the Fan Board Assembly” on page 40.
20. Place the foam cover over the E-Bay.
21. Install the top cover. See “Installing the Top Cover” on page 25.
22. Install the front cover. See “Installing the Front Cover” on page 24.

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Power Subsystem

23. Connect all peripheral cables to the I/O panel on the back of the system.

Power Subsystem
Follow the instructions in this section to remove and install a power supply module and
the power subsystem bay.
The SGI 1450 server can accommodate up to three power supply modules, each of which
is enclosed in a power subsystem bay. The power subsystem bay contains a power
distribution board (PDB). This board manages the power delivered by all functional
power supply modules.
Figure 2-5 shows the power subsystem bay with three power supply modules installed.

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2: Removing and Installing System Components

Figure 2-5

Power Subsystem

A. One of two screws on both sides of the chassis. When removing the power subsystem
bay, remove these screws.
B. Tab
C. Handle for the power supply module
D. Thumbscrew on the power supply module. When removing the power supply
module, loosen this screw.
E. Power supply module LED
F. Thumbscrew on the front of the power subsystem bay. When removing the power
subsystem bay, loosen this screw.
G. Power supply module standby LED indicating that 5 V standby power is operational.
Each module has one Standby LED. This LED corresponds to the power supply
module on the far right.

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Power Subsystem

Caution: Once you remove a power supply, make sure you replace it within two
minutes. If not possible in this time frame, re-insert the original unit. When a replacement
unit is available, repeat the replacement procedure. Vacant spaces alter airflow patterns
in the server system and may cause environmental conditions to exceed the
environmental limits of the server.

Removing a Power Supply Module
To remove a power supply module, follow these steps:
1.

Remove the front bezel by gently pulling on the edge of the front bezel. The ball
studs of the bezel release. Check the LED for each power supply module to
determine which power supply module needs to be replaced.

2. Loosen the power supply module retaining screw. See Figure 2-5 on page 34 for the
location of the screw.
3. Press down on the power supply module tab. Gently pull the power supply module
handle towards you and remove the power supply module from the power
subsystem bay.

Caution: You might feel initial resistance in sliding out the power supply from its bay.
Do not tilt or twist the supply; this can damage components. Resistance is caused by the
power supply module disengaging from its connector. Use even, steady force to remove
the supply.

Installing a Power Supply Module
To install a power supply module, follow these steps:

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2: Removing and Installing System Components

Remove the front bezel by gently pulling on the edge of the front bezel. The ball
studs of the bezel will release.

2. Remove the non-functioning power supply according to the instructions in the
preceding subsection.
3. Line up the new power supply module within the power subsystem bay.
4. Gently push the power supply module into the chassis until the tab snaps into
place. The LED for the new functional power supply module should turn green.
5. Tighten the thumbscrew on the front of the power supply module.
6. Snap on the bezel.

Removing the Power Subsystem Bay
To remove the power subsystem bay, follow these steps:

Warning: The on/off button on the front panel DOES NOT turn off the system AC
power. To remove power from system, unplug the AC power cords from the wall outlet
or the system.

Warning: Hazardous voltage, current, and energy levels are present inside the
power supply. There are no user-serviceable parts inside it; servicing should be done
by technically qualified personnel.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove any DC power cables attached to the hard drive bay or the peripheral bay
devices.
3. Remove the baseboard. See “Removing the Baseboard” on page 28.
4. Loosen the screw on the front of the chassis. This screw is noted by “F” in Figure 2-5
on page 34.
5. Release the two screws on each side of the chassis. One of the screws is noted by
“A” in Figure 2-5 on page 34.
6. Lift the piece of sheet metal covering the top of the power subsystem bay. The metal
plate is noted by “A” in Figure 2-6 on page 38.

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Power Subsystem

7. Un-route the AC distribution cable from the chassis retention features.
8. With the power supplies securely fastened, pull the power subsystem bay out of the
chassis.
9. Before shipping the power subsystem bay for service, remove all power supplies.

Installing the Power Subsystem Bay
To install the power subsystem bay, follow these steps:

Warning: The on/off button on the front panel DOES NOT turn off the system AC
power. To remove power from system, unplug the AC power cords from the wall outlet
or the system.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the non-functioning power subsystem bay according to the instructions in
the preceding subsection.
3. Place the power subsystem bay in the front of the chassis. The front of the power
subsystem bay should be flush with the front of the system.
4. Tighten the screw on the front of the power subsystem bay. The screws are noted by
“F” in Figure 2-5 on page 34.
5. Route the AC distribution cable into the chassis retention feature.
6. Attach the DC power cables to the hard drive bay and to any peripheral bay
devices.
7. Install the baseboard. See “Installing the Baseboard” on page 31.
8. Place the piece of sheet metal that covers the top of the power subsystem bay so that
the front of the sheet metal is flush with the front of the system. The metal plate is
noted by “A” in Figure 2-6.

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2: Removing and Installing System Components

Figure 2-6

Metal Plate Covering the Power Subsystem Bay

9. Tighten the two screws on each side of the chassis. One of the screws for each side is
noted by “A” in Figure 2-5 on page 34.
10. Securely fasten the power supply modules in the power subsystem bay. See
“Installing a Power Supply Module” on page 35.
11. Install the top cover. See “Installing the Top Cover” on page 25.
12. Install the front cover. See “Installing the Front Cover” on page 24.

Cooling System
Follow the instructions in this section to remove and install the fan board assembly, the
fan board, and each individual fan.
The fan board assembly is held in place by two screws, one on each side of the chassis.
The fan board assembly holds up to six individual fans. The top of each fan has two
finger holds, one on each side of the fan. A connector at the bottom of each fan fits into a
connector in the fan board assembly. Before removing the fan board assembly, make sure
that the replacement assembly is ready.

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Cooling System

Removing the Fan Board Assembly
To remove the fan board assembly, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Turn off the system by pressing the power on/off button on the front panel, and
unplug all AC power cords.
3. Remove the front cover. See “Removing the Front Cover” on page 23.
4. Remove the top cover. See “Removing the Top Cover” on page 25.
5. Remove all individual fans from the assembly. See “Removing and Installing
Individual Fans” on page 42.
6. Remove the two screws that secure the board assembly to the chassis. Set the screws
aside. You will need them later in this procedure. One of the screws is noted by “A”
in Figure 2-7.

Figure 2-7

Fan Board Assembly Screw

7. Lift the fan board assembly directly upward and rest it on the E-Bay assembly.
8. Disconnect the cables from the assembly. There are three cables, as follows:

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2: Removing and Installing System Components

•

One ribbon cable that connects to the baseboard.

•

One ribbon cable that connects to the front panel.

•

One power cable that connects to the power subsystem bay.

Installing the Fan Board Assembly
To install the fan board assembly, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Turn off the system by pressing the power on/off button on the front panel and
unplug all AC power cords.
3. Place the new fan board assembly on top of the E-Bay assembly so that the
connectors face the front of the system.
4. Connect the cables from the front panel, baseboard, and power system to the board
assembly.
5. Slide the assembly into the chassis.
6. Attach the two screws that secure the board assembly to the chassis. See Figure 2-7
on page 39.
7. Install the individual fans. See “Removing and Installing Individual Fans” on
page 42.
8. Install the top cover. See “Installing the Top Cover” on page 25.
9. Install the front cover. See “Installing the Front Cover” on page 24.

Replacing the Fan Board
To replace the fan board, follow these steps:
1.

Remove the fan board assembly. See “Removing the Fan Board Assembly” on
page 39.

2. Remove the screws securing the base from the upper portion of the fan bay
assembly. Keep them in a safe place. You will need them later in the procedure.
3. Rotate the upper portion of the assembly away from the base. The upper portion is
noted by “A” in Figure 2-8. The base is noted by “B”.

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Cooling System

C
A

Figure 2-8

Fan Assembly Rotated away From Its Base

A. Upper portion of fan board assembly
B. Fan board assembly base
C. Plastic rug
4. Remove the plastic rug, which is noted by “C” in Figure 2-8.
5. Remove the screws that secure the fan board to the assembly.
6. Install the new fan board and attach the screws.
7. Place the plastic rug back into the assembly. The orientation of the rug is important.
For the correct orientation, see Figure 2-8.
8. Rotate the assembly back towards its base.
9. Attach the screws that secure the base to the rest of the fan assembly.
10. Install the fan board assembly. See “Installing the Fan Board Assembly” on page 40.

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2: Removing and Installing System Components

Removing and Installing Individual Fans
To remove and install individual fans, follow these steps:

Caution: Once you remove an individual fan, make sure you replace it within two
minutes. If you cannot replace it, insert the original unit. When you have the replacement
unit, repeat the replacement procedure. Vacant spaces formerly occupied by fans alter air
flow patterns in the server system and may cause environmental conditions to exceed the
environmental limits of the server.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the top cover. See “Removing the Top Cover” on page 25.
3. Place your ring finger and thumb in the fingerholds of the fan in the chassis.
4. Gently pull the fan directly upward and out of the fan board assembly.
5. Slide the replacement fan into the fan board assembly.
6. When you start to feel some resistance, gently push down on the center of the fan
until the connectors solidly join.
7. Install the top cover. See “Installing the Top Cover” on page 25.
Note: After removing an individual fan, the system takes a few seconds to recognize the
absence of the fan. Before replacing the fan, make sure that the LED shows a fault and
recognizes that the slot for the fan is vacant.

Hard Drive Bay
Follow the instructions in this section to remove and install the hard drive bay.
The chassis contains one hard drive bay. The hard drive bay accommodates up to five
3.5-inch by 1.0-inch hot-swap Ultra 160 SCSI SCA hard drives.

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Hard Drive Bay

Removing the Hard Drive Bay
To remove the hard drive bay, follow these steps;
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the front cover. See “Removing the Front Cover” on page 23.
3. Remove the fan board assembly. See “Removing the Fan Board Assembly” on
page 39.
4. Disconnect the four cables attached to the hard drive bay.
5. Remove the SCSI hard drives. See “Removing a SCSI Hard Drive” in the SGI 1450
Server User’s Guide.
6. With a flat head screwdriver, press the two tabs inward on one side. Repeat this step
for the two tabs on the other side. The two tabs are noted by “A” in Figure 2-9.

Figure 2-9

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Hard Drive Bay Tabs

2: Removing and Installing System Components

7. With a flat head screwdriver, pry the right side of the hard drive bay out of the
chassis, as shown in Figure 2-10.

Figure 2-10

Removing the Hard Drive Bay from the Chassis

Installing the Hard Drive Bay
To install the hard drive bay, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Slide the hard drive bay into the chassis until the tabs engage the slots on the
chassis.
3. Connect the four cables to the hard drive bay.
4. Install the SCSI hard drives. See “Installing a SCSI Hard Drive” in the SGI 1450
Server User’s Guide.
5. Install the fan board assembly. See “Installing the Fan Board Assembly” on page 40.
6. Install the top cover. See “Installing the Top Cover” on page 25.
7. Install the front cover. See “Installing the Front Cover” on page 24.

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Peripheral Devices

Peripheral Devices
The chassis contains one peripheral bay for CD-ROM, DAT, and floppy drives. The
peripheral bay contains two smaller bays: a device bay and a media bay.
Follow the instructions in this section to replace drives in the media bay and the device
bay.

Removing a Drive from the Media Bay
The media bay holds a 0.5-inch slim-line floppy and a 0.5-inch slim-line CD-ROM drive.
The drives are secured to the media bay by a screw as shown in Figure 2-11. (Although
Figure 2-11 shows a single 3.5-inch floppy disk drive, the SGI 1450 server is shipped with
a 0.5-inch slim-line floppy and a 0.5-inch slim-line CD-ROM drive.)

Figure 2-11

Location of the Media Bay Screw

To remove a drive from the media bay, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Turn off the system by using the power on/off button on the front panel and unplug
the AC power cord.

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2: Removing and Installing System Components

3. Remove the front cover. See “Removing the Front Cover” on page 23.
4. Disconnect the power and signal cables from the back of the drive.
5. Remove and save the screw that secures the drive to the bay. The screw is noted by
“A” in Figure 2-11.
6. Slide the drive out. If the drive will be used again, place it in an antistatic protective
wrapper.

Installing a Drive in the Media Bay
To install a drive in the media bay, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the drive to be replaced according to the instruction in the preceding
subsection.
3. Slide the new drive in the media bay.
4. Connect the power and signal cables to the drive.
5. Insert and tighten the screw that secures the drive to the bay. The screw is noted by
“A” in Figure 2-11.
6. Install the front cover. See “Installing the Front Cover” on page 24.

Replacing a Drive in the Device Bay
To replace a drive in the device bay, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the front cover. See “Removing the Front Cover” on page 23.
3. Turn off the system by pressing the power on/off button on the front panel, and
unplug the AC power cord.
4. Disconnect the power and signal cables from the drive. The connectors are keyed for
ease in reconnecting them to the drive.
5. Slide the drive out. If the drive will be used again, place it in an antistatic protective
wrapper.
6. Slide the new drive into position using the guides in the device bay.

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SCSI Requirements

7. Connect the power and signal cables to the drive.
8. Install the front cover. See “Installing the Front Cover” on page 24.

SCSI Requirements
All SCSI devices must not be terminated except the peripheral at the end of the SCSI
cable.
Note: Integrating the 5.25-inch peripheral bay can affect EMC compliance and is a
regulated activity. Except as noted here, any changes to the bay configuration could
result in noncompliance with EMC regulations.

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Caution: To avoid damage to a 5.25-inch peripheral device, ensure the EMI gasketing
provided in the device bay does not bridge any open circuits on the exposed peripheral
device.

Chapter 3

3. Removing and Installing Baseboard Components

This chapter provides information on removing and installing the following baseboard
components:
•

Memory

•

Processors

•

Voltage Regulator Modules (VRMs)

•

Backup Battery

•

Add-in Boards

•

ICMB Card

The removal and installation procedures described in this chapter assume that the
baseboard components are readily accessible. For information on removing the top cover
and other items that may stand in the way of baseboard components, see Chapter 2,
“Removing and Installing System Components”.

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3: Removing and Installing Baseboard Components

Tools and Supplies Needed
The following tools and supplies allow you to remove and install all the system
components covered in this chapter:
•

Phillips (cross-head) screwdriver (#1 and #2 bit).

•

Phillips (cross-head) screwdriver with a long blade (#1 and #2 bit).

•

Jumper removal tool or needle-nosed pliers.

•

Antistatic wrist strap and conductive foam pad (recommended).

•

Pen or pencil.

•

Equipment log. As you integrate new parts into the system, add information about
them to your equipment log (see page 84). Record the model and serial number of
the system, all installed options, and any other pertinent information specific to the
system. You will need this information when running the SSU.

Pre-Installation Safety Precautions
The following warnings and cautions apply whenever you work with the baseboard.
Only a technically qualified person should integrate and configure the system.

Warning: The on/off button (a convex button) on the front panel does not turn off
the system AC power. To remove power from system, you must unplug the AC power
cords from the wall outlet or the system.

Warning: Hazardous electrical conditions may be present on power, telephone, and
communication cables. Turn off the system and disconnect the power cords,
telecommunications systems, networks, and modems attached to the system before
opening it. Otherwise, personal injury or equipment damage can result.

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Pre-Installation Safety Precautions

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Caution: ESD can damage disk drives, boards, and other parts. We recommend that you
do all procedures in this chapter only at an ESD-protected workstation. If one is not
available, provide some ESD protection by wearing an antistatic wrist strap attached to
chassis ground—any unpainted metal surface—on your system when handling parts.

Caution: For proper cooling and airflow, always install the chassis access covers before
turning on the system. Operating the system without this cover in place can damage
system parts.

Caution: A jumper is a small, plastic-encased conductor that slips over two jumper pins.
Newer jumpers have a small tab on top that you can grip with your fingertips or with a
pair of fine, needle-nosed pliers. If your jumpers do not have such a tab, take care when
using needle-nosed pliers to remove or install a jumper; grip the narrow sides of the
jumper with the pliers. Never grip the wide sides of the jumpers. This can damage the
contacts inside the jumper, causing intermittent problems with the function controlled by
that jumper. Take care to gently grip, but not squeeze, with the pliers or other tool you
use to remove a jumper; otherwise you might bend or break the stake pins on the board.

3: Removing and Installing Baseboard Components

Baseboard Connector and Component Locations
Figure 3-1 shows a detailed view of the baseboard connectors and components.

C
Y
X
W
V
U
T
AA
S
BB
R
CC
Q
DD

II
J
D
E

HH
F

K
L
M

G
H

N
P

EE FF GG I

Figure 3-1

Baseboard Connector and Component Locations

A. Legacy Narrow SCSI
B. Legacy Wide SCSI
C. SMM Connector
D. IMB Connector
E. HDD Activity
F. HPIB Connector
G. ICMB Connector
H. Connector not Used
I. Lithium Battery
J. Memory Module Connector
K. Video Connector
L. USB, External Connector
M. Network Connector
N. Parallel Connector

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Memory

O. COM1, COM2 Connector
P. Keyboard/Mouse
Q. Main Power 1
R. Auxiliary Power
S. Main Power 2
T. SMBus
U. Front Panel
V. IDE Connector
W. Floppy Connector
X. Configuration Jumpers
Y. Ultra 160 SCSI A
Z. Ultra 160 SCSI B
AA. Processor #1
BB. Processor #2
CC. Processor #3
DD. Processor #4
EE. Voltage Regulator Module (VRM) Connector #2
FF. Voltage Regulator Module (VRM) Connector #3
GG. Voltage Regulator Module (VRM) Connector #4
HH. 32-bit, 33-MHz Half-length PCI Slots
II. 64-bit, 66/33-MHz Hot-Plug PCI Slots
JJ. 64-bit, 33-MHz Hot-Plug PCI Slots

Memory
Follow the instructions in this section to remove and install the memory module and
DIMMs.
Main memory resides on an add-in board, called a memory module. The memory
module contains slots for 16 DIMMs, each of which must be at least 64 MB, and is
attached to the baseboard through a 330-pin connector, called the memory expansion
card connector (MECC). The memory module supports PC-100 compliant registered
ECC SDRAM memory modules. The ECC used for the memory module is capable of
correcting single-bit errors (SBEs), detecting 100 percent of double-bit errors over one
code word, and detecting nibble errors.
System memory begins at address 0 and is continuous (flat addressing) up to the
maximum amount of DRAM installed (exception: system memory is non contiguous in

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3: Removing and Installing Baseboard Components

the ranges defined as memory holes using configuration registers). The system supports
both base (conventional) and extended memory.
•

Base memory is located at addresses 00000h to 9FFFFh (the first 1 MB).

•

Extended memory begins at address 0100000h (1 MB) and extends to 3FFFFFFFFh
(16 GB), which is the limit of supported addressable memory. The top of physical
memory is a maximum of 16 GB (to 3FFFFFFFFh).

DIMM memory sizes from 256 MB to 16 GB are supported, with a 64/72-bit
four-way-interleaved pathway to main memory, which is also located on the module.
Therefore, data transfers between MADPs and DIMMs are in four-way interleave
fashion. Each of the four DIMMs must be populated in a bank. The 16 slots are divided
into four banks of four slots each. They are labeled A through D.
Bank A contains DIMM sockets A1, A2, A3, and A4. Banks B, C, and D each contain 4
DIMM sockets and are named in the same fashion. There are silk screens on the module
next to each DIMM socket to label its bank number. For the best thermal results, populate
the banks from A to D. For example, populate bank A and then bank B. For best
performance results, populate adjacent banks. For example, populate bank A and then
bank C.
Figure 3-2 shows a detailed view of the memory module slots.

A3
C3
B3
D3
A1
C1
B1
D1

A4
C4
B4
D4
A2
C2
B2
D2

X
Figure 3-2

Memory Module DIMM Installation Sequence

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Memory

X. One of sixteen DIMM sockets
Y. One of four memory address data paths (MADP)
Z. Memory expansion card connector (MECC)

Removing the Memory Module
The memory module is located on the baseboard as shown in Figure 3-1 on page 52. The
DIMM locations are shown in Figure 3-2.
To remove the memory module, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Pull the module upward slightly to disengage it from the baseboard connector.
3. Slide the module straight up and away from the baseboard until it clears the guide
rails.
4. Place the module component-side up on a nonconductive, static-free surface.

Installing the Memory Module
To install the memory module, follow these steps:
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Holding the memory module by its edges, align the module so its edge engages the
guide rails at the back and front of the electronics bay.

Caution: The memory module is held in place by the 330-pin connector on the
baseboard, the guide rails in the center of the electronics bay. You must support the
module until it is fully seated in the connector.
3. Push the memory module toward the baseboard until it fully engages the connector
on the baseboard.

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3: Removing and Installing Baseboard Components

Removing DIMMs
To remove DIMMs, follow these steps;

Caution: Use extreme care when removing a DIMM. Too much pressure can damage the
socket slot. Apply only enough pressure on the plastic ejector levers to release the DIMM.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the memory module and place it component-side up on a nonconductive,
static-free surface. See “Removing the Memory Module” on page 55.
3. Gently push the plastic ejector levers down to eject the DIMM from its socket.
4. Hold the DIMM only by its edges, being careful not to touch its components or gold
edge connectors. Carefully lift it away from the socket and store it in an antistatic
package.
5. Repeat to remove other DIMMs as necessary.

Installing DIMMs
To install DIMMs, follow these steps:

Caution: Use extreme care when installing a DIMM. Applying too much pressure can
damage the socket. DIMMs are keyed and can be inserted in only one way.

Caution: Mixing dissimilar metals might cause memory failures later, resulting in data
corruption. Install DIMMs with gold-plated edge connectors only in gold-plated sockets.
1.

Holding the DIMM only by its edges, remove it from its antistatic package.

2. Orient the DIMM so that the two notches in the bottom edge of the DIMM align
with the keyed socket on the memory module. See Figure 3-3.

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Processors

Figure 3-3

DIMM Orientation in a Memory Module

Note: DIMM slots on the memory module must be installed only in certain
configurations. See the beginning of this section for requirements.
3. Insert the bottom edge of the DIMM into the socket, and then press down firmly on
the DIMM until it seats correctly.
4. Gently push the plastic ejector levers on the socket ends to the upright position.
5. Repeat the steps to install each DIMM.

Processors
Follow the instructions in this section to remove and install a processor, the processor
retention mechanisms, and processor heatsinks.

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Caution: You might damage the system if you install a processor that is inappropriate
for your system. Make sure your system can handle the thermal and power conditions of
the newer, faster processor. For exact information about processor interchangeability,
contact your customer service representative.

3: Removing and Installing Baseboard Components

Caution: Reduce the risk of electrostatic discharge (ESD) damage to the processor by
doing the following: (1) Touch the metal chassis before touching the processor or
baseboard. Keep part of your body in contact with the metal chassis to dissipate the static
charge while handling the processor. (2) Avoid moving around unnecessarily.
A processor has the following components:

D
C

B
A

E
F
J
L
K

Figure 3-4

Processor Orientation and Components

A. Processor 1
B. Processor 2
C. Processor 3
D. Processor 4
E. Screws (2) at the top of the processor
F. Clip on processor handle
G. Processor handle
H. Termination module
I. Processor heat sink
J. Processor retention mechanism
K. Screws (2) for retention module guide rails
L. Note the handle/screw orientation for each processor pair

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Processors

Removing a Processor
See Figure 3-4 for the location of processor components.
1.

Observe the safety and ESD precautions at the beginning of this chapter and the
additional cautions given in this section.

2. Remove the two screws that secure the handle to the processor.
3. Pull firmly and straight up on either side of the processor handle.
4. Put the processor on a piece of conductive foam and store it in an antistatic package.

Installing a Processor
See Figure 3-4 for the location of processor components.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the new processor from its antistatic package and place it on a grounded,
static-free surface or conductive foam pad.
3. Attach the processor handle to the processor. For more information, see “Installing
Processor Handles” on page 60.
4. If necessary, attach the heatsink to the processor. For more information, see
“Installing Processor Heatsinks” on page 60.
5. Orient the processor correctly in the chassis. See Figure 3-4 on page 58 and
Figure 3-1 on page 52.
6. Slide the processor into the guides on each side of the processor slot and press the
processor downward firmly into the baseboard connector.
7. Insert and tighten two screws at the top of the processor handle.

Removing Processor Retention Mechanisms
See Figure 3-4 for the location of processor components.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Make sure that the processor has been removed from the baseboard. To remove the
processor, see “Removing a Processor” on page 59.

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3: Removing and Installing Baseboard Components

3. With a long bladed screwdriver, remove the two screws at the base of the processor
retention mechanism.
4. Remove the retention mechanism from the baseboard.

Installing Processor Retention Mechanisms
See Figure 3-4 for the location of processor components.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. With a long bladed screwdriver, tighten the two screws at the base of the processor
retention mechanism.

Installing Processor Handles
Depending on your configuration, the handles for the processor might not be attached to
the processor. In this case, you must attach a handle to each processor.
1.

Orient the handle as shown in Figure 3-4 on page 58.

2. Press the handle into the processor until the handle snaps into place.

Installing Processor Heatsinks
Depending on your configuration, the heatsink for each processor might not be attached.
In this case, you must attach one heatsink to each processor. If you are working with a
processor terminator module, you do not install a heatsink.
See Figure 3-4 for the location of processor components.
1.

Remove the heatsink from its protective cover.

2. Pull the tab on the bottom of the heatsink to remove the blue plastic film and expose
the square of adhesive thermal grease that will help attach the heatsink to the
processor.
3. Orient the heatsink on the correct side of the processor. For correct orientation, see
Figure 3-4.
4. Because of the adhesive grease on the heatsink, be careful to orient the heatsink
properly before placing it against the processor.

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Voltage Regulator Modules (VRMs)

5. Attach the heatsink to the processor with five 6-32 X 3/8 screws, and tighten to 8-10
inch-pounds.

Voltage Regulator Modules (VRMs)
Follow the instructions in this section to remove and install a VRM.
Up to seven VRMs provide power for processors. Table 3-1 shows the relationship
between VRMs and processors.
Table 3-1

VRM/Processor Power Sequencing

VRM #

VRM provides power for

Description

1 (Embedded)

Processor #1

Processor core power only

2 (Embedded)

Processor #1

GLT (FSB reference)

3 (Embedded)

Processor #1 and #2

L2 cache power only

4 (Embedded)

Processor #3 and #4

L2 cache power only

#2 Connector

Processor #2

Processor core power only

#3 Connector

Processor #3

Processor core power only

#4 Connector

Processor #4

Processor core power only

VRMs 1 through 4 are embedded in the baseboard. Additional VRMs plug into
connectors 2 though 4 on the baseboard. You must use a specific number and connector
population sequence of VRMs for each combination of processors and termination
boards. Table 3-2 lists the required number and location of VRMs for each potential
processor.
Table 3-2

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Processor/VRM Population Sequencing

If you have a processor in connector

VRM in connector #

None. All required VRMs are embedded in the baseboard.

1 and 2

3: Removing and Installing Baseboard Components

Table 3-2

Processor/VRM Population Sequencing

If you have a processor in connector

VRM in connector #

1, 2, and 3

1, 2, 3, and 4

Removing a VRM
To decide which VRM you need to remove, see Figure 3-1 on page 52.

Caution: You might damage the system if you install a VRM that is inappropriate for
your system. For exact information about VRM and processor interchangeability, contact
your customer service representative.

Caution: Reduce the risk of electrostatic discharge (ESD) damage to the VRM by doing
the following: (1) Touch the metal chassis before touching the VRM or baseboard. Keep
part of your body in contact with the metal chassis to dissipate the static charge while
handling the VRM. (2) Avoid moving around unnecessarily.
1.

Using a small flat-head screwdriver, push the plastic ejector levers on each end of
the connector away from the VRM to eject it out of the connector. See Figure 3-5 for
the location of the ejector levers.

2. Pull the VRM straight up and out of the baseboard.
3. Place the VRM on a nonconductive, static-free surface, or store it in an antistatic
protective wrapper.

Installing a VRM
To decide on which connector you need to install a VRM, see Figure 3-1 on page 52.
1.

Remove the VRM from its protective package.

2. Orient the VRM in the VRM connector correctly. See Figure 3-5.

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Backup Battery

3. Carefully insert the VRM in the connector on the baseboard. Make sure you do not
bend the connector pins.
4. Push down firmly on both ends of the VRM until the ejector levers of the connector
snap into place, locking the VRM in the connector.
5. Make sure that the ejector levers are firmly in place. If not, use a screwdriver to push
them into place.

Figure 3-5

Installing a VRM

A. VRM
B. VRM connector on baseboard
C. Ejector lever

Backup Battery
Follow the instructions in this section to replace the lithium battery.
The lithium battery on the baseboard powers the real-time clock (RTC) for three to four
years in the absence of power. When the battery weakens, it loses voltage and the system
settings stored in CMOS RAM in the RTC (for example., the date and time) may be
wrong. Contact your customer service representative or dealer for a list of approved
devices.

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3: Removing and Installing Baseboard Components

Warning: If the system has been running, any installed PCI add-in board on the
baseboard will be hot. To avoid the possibility of a burn, be careful when removing or
installing baseboard components, especially those that are located near processors.
The following warning and translations are required by specific certifying agencies to be
printed immediately adjacent to the procedure for removing the RTC.

Warning: There is a danger of explosion if the battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the equipment
manufacturer. Discard used batteries according to manufacturer's instructions.

Advarsel!: Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering. Udskiftning
må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til
leverandøren.

Advarsel: Lithiumbatteri - Eksplosjonsfare. Ved utskifting benyttes kun batteri
som anbefalt av apparatfabrikanten. Brukt batteri returneres apparatleverandøren.

Varning: Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller
en ekvivalent typ som rekommenderas av apparattillverkaren. Kassera använt batteri
enligt fabrikantens instruktion.

Varoitus: Paristo voi räjähtää, jos se on virheellisesti asennettu. Vaihda paristo
ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo
valmistajan ohjeiden mukaisesti.
Note the location of the lithium battery in Figure 3-1 on page 52.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Remove the VRMs in VRM connectors 3 and 4. For more information, see
“Removing a VRM” on page 62.

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Add-in Boards

3. Insert the tip of a small flat-head screwdriver or equivalent under the plastic tab on
the snap-on plastic retainer.
4. Gently push down on the screwdriver to lift the battery.
5. Remove the battery from its socket.
6. Dispose of the battery according to local ordinance.
7. Remove the new lithium battery from its package and, being careful to observe the
correct polarity, insert it in the battery socket.

Add-in Boards
Follow the instructions in this section to remove and install add-in boards.
Figure 3-1 on page 52 identifies the add-in board locations. The baseboard contains the
following eight PCI slots:
•

Two 32-bit, 33-MHz half-length PCI slots

•

Two 64-bit, 66/33-MHz hot-plug PCI slots

•

Four 64-bit, 33-MHz hot-plug PCI slots

Typically, the hot-plug PCI add-in boards are held in the hot-plug slots by a front and rear
hot-plug retention mechanism. See Figure 3-6 on page 68.
Note: At this time, the Linux operating system does not support use of the PCI hot-plug
(PHP) feature. If you are running Linux, your system must be turned off before installing
or removing PCI boards. Windows 2000 requires drivers that are PHP-compatible in
order to use the PHP feature.

Removing a 32-bit, 33-MHz Half-Length PCI Add-in Board
The add-in boards for the half-length 33-MHz PCI slots are not hot-pluggable. In other
words, you must turn off the AC power to the system first before installing boards at
these locations.

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3: Removing and Installing Baseboard Components

Warning: The on/off button on the front panel does not turn off the system AC
power. To remove power from system, you must unplug the AC power cords from the
wall outlet or the system.

Caution: Slot covers must be installed on all vacant expansion slots. This maintains the
electromagnetic emissions characteristics of the system and ensures proper cooling of
system components.
1.

Observe the safety and ESD precautions at the beginning of this chapter.

2. Disconnect any cables attached to the PCI board you are removing.
3. Remove and save the screw that attaches the existing board retaining bracket to the
chassis.
4. Holding the board by its top edge or upper corners, carefully pull it out. Do not
scrape the board against other components.
5. Store the board in an antistatic protective wrapper.
6. If you are not reinstalling a board in the same slot, install a slot cover over the
vacant slot. The tapered foot of the cover must fit into the mating slot in the
expansion slot frame.

Installing a 32-bit, 33-MHz Half-Length PCI Add-in Board
To install a 32-bit, 33-MHz half-length PCI add-in board, follow these steps:

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Add-in Boards

Warning: The on/off button on the front panel does not turn off the system AC
power. To remove power from the system, you must unplug the AC power cords from
the wall outlet or the system.

Caution: Do not overload the baseboard by installing add-in boards that draw excessive
current.

Caution: Add-in boards can be extremely sensitive to ESD and always require careful
handling. After removing the board from its protective wrapper or from the baseboard,
place it component-side up on a grounded, static-free surface or conductive foam pad, if
available. Do not slide the board over any surface.
1.

Remove the add-in board from its protective wrapper. Be careful not to touch the
components or gold edge connectors. Place the board component-side up on an
antistatic surface.

2. Record the serial number of the add-in board in your equipment log. See
“Equipment Log” on page 84.
3. Set jumpers or switches on the PCI board according to the manufacturer's
instructions.
4. Remove and save the screw that attaches the existing board or expansion slot cover
to the chassis.
5. Remove and save the expansion slot cover.
6. Hold the add-in board by its top edge or upper corners. Firmly press it into an
expansion slot on the baseboard. The tapered foot of the board-retaining bracket
must fit into the mating slot in the expansion slot frame. Install a PCI board
component-side down.
7. Use the screw removed earlier to fasten the new board-retaining bracket to the
chassis. Tighten the screw firmly (6.0 inch-pounds). Attach cables if necessary.

Removing a 64-bit, 66/33-MHz Hot-Plug PCI Add-in Board
See Figure 3-6 for an illustration of the front hot-plug retention mechanism.

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3: Removing and Installing Baseboard Components

Caution: Slot covers must be installed on all vacant expansion slots. This maintains the
electromagnetic emissions characteristics of the system and ensures proper cooling of
system components.

Note: At this time, the Linux operating system does not support use of the PCI hot-plug
(PHP) feature. If you are running Linux, your system must be turned off before installing
or removing PCI boards. Windows 2000 requires drivers that are PHP-compatible in
order to use the PHP feature.

Figure 3-6

Front Hot-Plug Retention Mechanism

A. Green and amber LEDs
B. Press here on the inside of the chassis and then rotate to release the PCI board
C. PHP retention mechanism from the outside of the chassis
D. HW push-button

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Add-in Boards

Observe the safety and ESD precautions at the beginning of this chapter.

2. Make sure that the slot is powered off. If the slot is powered on, turn the power to
the slot off through the PCI hot-plug application on your system, or by pressing the
HW push-button.
3. Disconnect any cables attached to the board you are removing.
4. If there is a front and rear hot-plug retention mechanism, release it.
5. Remove the PCI board by pulling straight up.
6. Store board in an antistatic protective wrapper.
7. If you are not reinstalling a board in the same slot, install a slot cover over the
vacant slot. The tapered foot of the cover must fit into the mating slot in the
expansion slot frame.

Installing a 64-bit, 66/33-MHz Hot-Plug PCI Add-in Board
To install a 64-bit, 33/66-MHz hot-plug PCI add-in board, follow these steps:

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Caution: Do not overload the baseboard by installing add-in boards that draw excessive
current.

3: Removing and Installing Baseboard Components

Remove the add-in board from its protective wrapper. Be careful not to touch the
components or gold edge connectors. Place the board component-side up on an
antistatic surface.

2. Record the serial number of the add-in board in your equipment log. See
“Equipment Log” on page 84.
3. Make sure that the slot is powered off. Power off the add-in board through the PCI
hot-plug application on your system, or by pressing the HW push-button.
4. Set jumpers or switches on the board according to the manufacturer's instructions.
5. If necessary, remove and save the expansion slot cover.
6. Hold the add-in board by its top edge or upper corners. Firmly press it into an
expansion slot on the baseboard. The tapered foot of the board-retaining bracket
must fit into the mating slot in the expansion slot frame. Install a PCI board
component-side down.
7. If there is a front and rear hot-plug retention mechanism, engage it.
8. Use the screw removed earlier to fasten the new board to the chassis. Tighten the
screw firmly (6.0 inch-pounds).
9. Attach cables if necessary.
10. Power on the add-in board through the PCI hot-plug application on your system, or
by pressing the HW push-button.

ICMB Card
Follow the instructions in this section to remove and install a ICMB card.
The ICMB card allows two servers to communicate through a serial connection. An
ICMB card is installed in each server; the cards are connected through a serial cable.

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ICMB Card

Establishing communication between servers using the ICMB card is a two-step process.
First, install the ICMB card in each server. Then, make sure that the software required for
the card is in place. Software for the ICMB card includes firmware on the card and
software already included in the ISC software. ISC software is included in the server
software kit accompanying the baseboard.
Figure 3-7 shows an ICMB card. A filler panel is attached to the ICMB card with two
screws. The panel, noted by “B”, is identical to any filler panel for a PCI add-in board.
You attach the filler panel to the rear of a chassis in the same way that you would attach
a PCI add-in board.

A
B

Figure 3-7

ICMB Card

Installing an ICMB Card
To install an ICMB card, follow these steps:
1.

Remove the ICMB card and internal cable from their protective wrapper.

2. Designate a PCI slot for the ICMB card. The card does not plug into the connector on
the baseboard, but the card does use the opening at the rear of the chassis.
3. Secure the filler panel to the chassis. On most systems, you use one screw. The screw
is noted by “A” in Figure 3-8.

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3: Removing and Installing Baseboard Components

Figure 3-8

Example of an ICMB Card Attached to a Chassis

4. Attach the internal cable to the internal connector on the ICMB card. The internal
cable connection to the card is noted by “A” in Figure 3-9.

Figure 3-9

Internal Cable Attached to the ICMB Card

5. Connect the other end of the cable to the ICMB connector on the baseboard. The
location of the connector is shown in Figure 3-1 on page 52.
6. The ICMB kit contains an external cable. The cable attaches to the card's external
connector. The external cable connection to the card is noted by “A” in Figure 3-10.

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ICMB Card

Figure 3-10

External Cable Attached to the Card

Removing an ICMB Card
To remove an ICMB card, follow these steps:
1.

Disconnect the internal and external cables from the card and the baseboard.

2. Remove the screw securing the card to the chassis. The screw is noted by “A” in
Figure 3-8 on page 72.
3. Remove the ICMB card from the server.

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Chapter 4

4. Solving Problems

This chapter helps you identify and solve problems that might occur while you are using
the system.

Resetting the System
Table 4-1 shows the commands used to reset the system.
Table 4-1

Resetting Commands

To do this:

Press:

Clear system memory, restart POST, and reload the operating
system.

Reset button or

Cold boot reset, which clears system memory, restarts POST,
Power off/on
reloads the operating system, and stops power to all peripherals.

Initial System Startup
Problems that occur at initial system startup are usually caused by incorrect installation
or configuration. Hardware failure is a less frequent cause. Use the following check list
to troubleshoot Startup problems:

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•

Are all cables correctly connected and secured?

•

Are the processors fully seated in their slots on the baseboard?

•

Are all PCI add-in boards fully seated in their slots on the baseboard?

•

Are all switch and jumper settings on the baseboard correct?

•

Are all jumper and switch settings on add-in boards and peripheral devices correct?
To check these settings, see the manufacturer's documentation. If applicable, ensure

4: Solving Problems

that there are no conflicts (for example, two add-in boards sharing the same
interrupt).
•

Are all DIMMs installed correctly?

•

Are all peripheral devices installed correctly?

•

If the system has a hard drive, is it properly formatted or configured?

•

Are all device drivers properly installed?

•

Are the configuration settings made with the SSU correct?

•

Is the operating system properly loaded? See the operating system documentation.

•

Did you press the system power on/off button on the front panel to turn the server
on (the power-on light should be lit)?

•

Are the system power cords properly connected to the system and plugged into a
NEMA 6-15R outlet for 100-120 V~ or for 200-240 V~?

•

Is AC power available at the wall outlet?

•

If these items are correct but the problem recurs, see “Specific Problems and
Corrective Actions” on page 77.

New Application Software
Problems that occur when you run new application software are usually related to the
software. Faulty equipment is much less likely, especially if other software runs correctly.
Use the following checklist to troubleshoot application software problems;

•

Does the system meet the minimum hardware requirements for the software? See
the software documentation.

•

Is the software an authorized copy? If not, get one. Unauthorized copies often do
not work.

•

If you are running the software from a diskette, is it a good copy?

•

If you are running the software from a CD-ROM disk, is the disk scratched or dirty?

•

If you are running the software from a hard drive, is the software correctly
installed? Were all necessary procedures followed and files installed?

•

Are the correct device drivers installed?

•

Is the software correctly configured for the system?

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After the System Has Been Running Correctly

•

If the problems persist, contact the software vendor's customer service
representative.

After the System Has Been Running Correctly
Problems that occur after the system hardware and software have been running correctly
often indicate equipment failure. Often the simple solutions for these problems, however,
can cause additional problems. Sometimes problems stem from changes made to the
system, such as hardware or software that has been added or removed. Use the following
checklist to trouble shoot such problems:
•

If you are running the software from a diskette, try a new copy of the software.

•

If you are running the software from a CD-ROM disk, try a different disk to see if
the problem occurs on all disks.

•

If you are running the software from a hard drive, try running it from a diskette. If
the software runs correctly, there may be a problem with the copy on the hard drive.
Reinstall the software on the hard disk, and try running it again. Make sure all
necessary files are installed.

•

If the problems are intermittent, there may be a loose cable, dirt in the keyboard (if
keyboard input is incorrect), a marginal power supply, or other random component
failures.

•

If you suspect that a transient voltage spike, power outage, or brownout might have
occurred, reload the software and try running it again.

Note: Symptoms of voltage spikes include random errors in data files, a flickering video
display, unexpected system reboots, and lack of response to user command. If you are
experiencing any of these symptoms, you may want to install a surge suppressor
between the power outlet and the system power cords.

Specific Problems and Corrective Actions
This section provides possible solutions for the following problems:
•

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Power light does not light.

4: Solving Problems

•

No beep codes.

•

No characters appear on screen.

•

Characters on the screen appear distorted or incorrect.

•

System cooling fans do not rotate properly.

•

Diskette drive activity light does not light.

•

Hard drive activity light does not light.

•

CD-ROM drive activity light does not light.

•

Problems with application software.

Try the solutions in the order given. If you cannot correct the problem, contact your
service representative or authorized dealer.

Power Light Does Not Light
Check the following:
•

Are all the power supplies plugged in? Is the power turned on to the power strip or
outlet? Do you have a blown fuse or breaker?

•

Is the system functioning normally? If so, the power LED may be defective, the
cable from the front panel to the fan board may be loose, or the cable from the fan
board to the baseboard may be loose.

If all items are correct and problems persist, contact your service representative or
authorized dealer.

No Beep Codes
If the system operates normally, but there was no beep, the speaker may be defective. If
the speaker is enabled, but the speaker does not function, contact your service
representative or authorized dealer.
Record the beep code emitted by POST, and see “Error and Informational Messages” on
page 82.

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Specific Problems and Corrective Actions

No Characters Appear on Screen
Check the following:
•

Is the keyboard working? Check to see that the “Num Lock” light is functioning.

•

Is the video monitor plugged in and turned on? Many modern video monitors shut
down when inactive and may require a moment to warm up when activated.

•

Are the brightness and contrast controls on the video monitor properly adjusted?

•

Are the video monitor switch settings correct?

•

Is the video monitor signal cable properly installed?

•

Is the onboard video controller enabled?

If you are using an add-in video controller board, follow these steps:
1.

Verify that the video controller board is fully seated in the baseboard connector.
Also verify that the video monitor is plugged in to the active video controller.

2. Reboot the system so that changes take effect.
3. If there are still no characters on the screen after you reboot the system and POST
emits a beep code, write down the beep code. This information is useful for your
service representative. See “Error and Informational Messages” on page 82.
4. If you do not receive a beep code and characters do not appear, the video display
monitor or video controller may have failed. You can verify this by trying the
monitor on another system or trying a different monitor on this system. Contact
your service representative or authorized dealer.

Characters Are Distorted or Incorrect
Check the following:
•

Are the brightness and contrast controls properly adjusted on the video monitor?
See the manufacturer's documentation.

•

Are the video monitor signal and power cables properly installed?

•

Is the correct monitor/video board installed for your operating system?

If the problem persists, the video monitor may be faulty or it may be the incorrect type.
Contact your service representative or authorized dealer.

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4: Solving Problems

System Cooling Fans Do Not Rotate Properly
If the system cooling fans are not operating properly, system components could be
damaged.
Check the following:
•

Is AC power available at the wall outlet?

•

Are the system power cords properly connected to the system and the wall outlet?

•

Did you press the power on/off switch?

•

Is the power-on light lit?

•

Did any of the fan motors stop. (Use the server management subsystem to check the
fan status.)

•

Is the cable from the fan board connected to the baseboard?

•

Are the power supply cables properly connected to the baseboard and the fan board
assembly?

•

Are there any shorted wires caused by pinched cables or power connector plugs
forced into power connector sockets the wrong way?

If the switches and connections are correctly installed and AC power is available at the
wall outlet, contact your service representative or authorized dealer.

Diskette Drive Activity Light Does Not Light
Check the following:
•

Are the diskette drive power and signal cables properly installed?

•

Are all relevant switches and jumpers on the diskette drive set correctly?

•

Is the diskette drive properly configured?

•

Is the diskette drive activity light always on? If so, the signal cable may be plugged
in incorrectly.

If you are using the onboard diskette controller, use the SSU to make sure that “Onboard
Floppy” is set to Enabled. If you are using an add-in diskette controller, make sure that
“Onboard Floppy” is set to Disabled. To run the SSU, see “Using the System Setup
Utility” in the SGI 1450 Server User’s Guide.

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Specific Problems and Corrective Actions

If the problem persists, there may be a problem with the diskette drive, baseboard, or
drive signal cable. Contact your service representative or authorized dealer.

Hard Drive Activity Light Does Not Light
If you installed one or more hard drives in your system, check the following:
•

Are the power and signal cables to the drive properly installed?

•

Are all relevant switches and jumpers on the hard drive and adapter board set
correctly?

•

Is the hard drive properly configured?

CD-ROM Drive Activity Light Does Not Light
Check the following:
•

Are the power and signal cables to the CD-ROM drive properly installed?

•

Are all relevant switches and jumpers on the drive set correctly?

•

Is the drive properly configured?

•

Is the onboard IDE controller enabled?

Note: The hard drive activity light on the front panel lights when a SCSI device
controlled by the onboard SCSI host controller is in use. This LED does not display
CD-ROM activity.

Problems with Application Software
Check the following:

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•

Verify that the software is properly configured for the system. See the software
installation and operation documentation for instructions on setting up and using
the software.

•

Try a different copy of the software.

•

Make sure all cables are installed correctly.

4: Solving Problems

•

Verify that the baseboard jumpers are set correctly. See “Changing Jumper Settings”
on page 133.

•

If other software runs correctly on the system, contact your vendor about the failing
software.

If the problem persists, contact the software vendor's customer service representative.

Error and Informational Messages
When you turn on the system, POST displays messages that provide information about
the system. If a failure occurs, POST emits beep codes that indicate errors in hardware,
software, or firmware. If POST can display a message on the video display screen, it
causes the speaker to beep twice as the message appears.
Table 4-2 shows the standard BIOS Port-80 codes.

Table 4-2

Standard BIOS Port-80 Codes

Beeps

Reason

1-1-1-1

There are no processors present in the system, or the processors are so
incompatible (for example, mismatched cache voltages) that the system BIOS
cannot be run

1-2-2-3

BIOS ROM checksum

1-3-1-1

Test DRAM refresh

1-3-1-3

Test 8742 keyboard controller

1-3-3-1

Autosize DRAM, system BIOS stops execution here if the BIOS does not detect
any usable memory DIMMs

1-3-4-1

Base RAM failure, BIOS stops execution here if entire memory is bad

2-1-2-3

Check ROM copyright notice

2-2-3-1

Test for unexpected interrupts

1-2

Search for option ROMs. One long, two short beeps on checksum failure

One short beep before boot

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Error and Informational Messages

Table 4-3 shows the recovery BIOS Port-80 codes.

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Table 4-3

Recovery BIOS Port-80 Codes

Beeps

Reason

1-1-1-1

There are no processors present in the system, or the processors are so
incompatible that the system BIOS cannot be run (like mismatched cache
voltages).

4: Solving Problems

Equipment Log
Use the blank equipment log in Table 4-4 to record information about the system. Some
of this information may be required when running the system setup utility (SSU).
Table 4-4

Equipment Log

Item

Manufacturer
Name

Model Number

Serial Number

Date Installed

System
Baseboard
Processor speed
and cache
Video display
Keyboard
Mouse
Diskette drive A
Diskette drive B
Tape drive
CD-ROM drive
Hard drive 1
Hard drive 2
Hard drive 3
Hard drive 4
Hard drive 5

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Equipment Log

Table 4-4 (continued)

Item

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Equipment Log

Manufacturer
Name

Model Number

Serial Number

Date Installed

Appendix A

A. Technical Reference

This appendix provides a description of the rear panel I/O ports, the peripheral adapter
board and connectors, and the baseboard connectors and jumpers.

Internal Cables and Connectors
Table A-1 describes all cables and connectors of the SGI 1450 server.
Table A-1

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SGI 1450 server Cables and Connectors

Type

Qty

From

Interconnect Description

32-bit PCI, 5 V

Baseboard

PCI adapter card

120-pin card edge connect

64-bit PCI, 5 V

Baseboard

PCI adapter card

184-pin card edge connect

64-bit PCI, 3.3 V 2

Baseboard

PCI adapter card

184-pin card edge connect

Keyboard

Baseboard

External interface

Keyboard device

Mouse

Baseboard

External interface

Mouse device

System control

Baseboard

Fan distribution board

2x15 flat ribbon cable

S/M feature

Baseboard

Intel S/M card

2x13 flat ribbon cable

Narrow SCSI

Baseboard

5.25-inch device

2x25 flat ribbon cable

Floppy

Baseboard

Floppy device

2x17 flat ribbon cable

IDE

Baseboard

CD-ROM device

2x20 flat ribbon cable

HPIB

Baseboard

HPIB board

2x10 flat ribbon cable

Auxiliary
processor fans

Baseboard

N/A

1x3-pin connector, NOT USED
FOR SGI 1450 SERVER

Parallel port

Baseboard

External interface

25-pin parallel port connector

A: Technical Reference

Table A-1 (continued)

SGI 1450 server Cables and Connectors

Type

Qty

From

Interconnect Description

Serial

Baseboard

External interface

9-pin serial port connector

Ethernet

Baseboard

External interface

RJ45 connector port

Internal wide
1
Ultra 160/m
SCSI, channel A

Baseboard

HDD backplane

68-pin solid core flat ribbon
cable

External wide
1
Ultra 160/m
SCSI, Channel B

Baseboard

External interface

68-pin solid core twisted pair
cable to panel mounted external
interface connector

SE wide SCSI

Baseboard

5.25-inch device

68-pin connector

Auxiliary IMB

Baseboard

HDD backplane

1x3-pin connector on baseboard
discrete cabled to a 1x4-pin
connector on HDD backplane
(one pin left floating)

S/M bus

Baseboard

N/A

NOT USED FOR SGI 1450
SERVER

ICMB internal

Baseboard

ICMB board

1x7-pin cable

ICMB external

ICMB board External interface

1x6-pin ICMB cable

USB

Baseboard

External interface

1x4-pin USB cables

Internal USB

Baseboard

Internal interface

1x4-pin cable

EBB

Baseboard

Internal interface

1x3-pin cable

Video

Baseboard

External interface

15-pin, monitor device

VRM

Baseboard

VRM module

50-pin

Main power 1

Power
Baseboard
supply cage

2x10-pin discrete cable

Main power 2

Power
Baseboard
supply cage

2x12-pin discrete cable

Auxiliary
power

Power
Baseboard
supply cage

2x7-pin discrete cable

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Internal Cables and Connectors

Table A-1 (continued)
Type

Qty

From

Interconnect Description

Slot 2

Baseboard

Processor module

330-pin card edge connect

Memory

Baseboard

Memory module

330-pin card edge connect

DIMM

Memory
module

DIMM

168-pin card edge connect

SCA-2 HDD

HDD
Backplane

External interface

80-pin SCA-2 compatible device

Auxiliary HDD 2
fans

HDD
backplane

N/A

1x3-pin connector, NOT USED
FOR SGI 1450 SERVER

SAFE-TE

HDD
backplane

SAF-TE board

120-pin card edge connect

HDD power

Power
HDD backplane
supply cage

1x4-pin discrete cable

Front panel

front panel

2x12-pin flat ribbon cable

Fan power

Power
Fan board assembly
supply cage

2x3-pin discrete cable

System fans

Fan board
assembly

2x2-pin blind mate connector

Peripheral
power

Power
Floppy device (adapter 1x4-pin connectors (daisy
supply cage board) & half height
chained)
device

.5-inch floppy
signal

.5-inch
floppy
adapter
board

.5-inch floppy device

26-pin flat cable

.5-inch
CD-ROM
power

Peripheral
power

.5-inch CD-ROM
adapter board

1x2-pin, cable also provides
another 1x4pin connector for an
additional half height device

.5-inch
CD-ROM
adapter
board

.5-inch CD-ROM
device

2x25-pin connector

.5-inch
1
CD-ROM signal

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SGI 1450 server Cables and Connectors

Fan board assembly

Fan modules

A: Technical Reference

SGI 1450 server Cables and Connectors

Table A-1 (continued)
Type

Qty

From

Interconnect Description

AC distribution 1

Power cord

Power supply cage

3-pin PVC double insulated
power cordage

AC power

AC
External interface
distribution

Recommend 3-pin SJT power
cord

Connectors Accessible to the User
This section describes the rear panel I/O ports.

Keyboard and Mouse Ports
These identical PS/2-compatible ports share a common housing. The top one is the
mouse and the bottom one is the keyboard. Table A-2 shows the cable pinout
assignments for the keyboard and mouse connectors.
Table A-2

Keyboard and Mouse Connectors

Mouse Pin

Signal

Keyboard Pin

Signal

MSEDAT (mouse data)

KEYDAT (keyboard data)

No connection

GND (ground)

Fused VCC (+5 V)

MSECLK (mouse clock)

KEYCLK (keyboard clock)

No connection

Serial Ports
The baseboard provides two RS-232C serial ports (COM1 is to the left, COM2 is to the
right). They are D-subminiature 9-pin connectors. Each serial port can be enabled
separately with the configuration control provided on the baseboard.

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Connectors Accessible to the User

The COM2 serial port can be used either as an emergency management port or as a
normal serial port. Table A-3 shows the cable pinout assignments for the serial ports.
Table A-3

Serial Ports

Signal

DCD (carrier detect)

RXD (receive data)

TXD (transmit data)

DTR (data terminal ready)

GND

DSR (data set ready)

RTS (request to send)

CTS (clear to send)

RIA (ring indicator)

Parallel Port
The IEEE 1284-compatible parallel port, used primarily for a printer, sends data in
parallel format. The parallel port is accessed through a D-subminiature 25-pin connector.
Table A-4 shows the cable pinout assignments for the parallel port.
Table A-4

007-4276-001

Parallel Port

Signal

STROBE_L

AUFDXT_L (auto feed)

Data bit 0

ERROR_L

Data bit 1

INIT_L (initialize printer)

Data bit 2

SLCTIN_L (select input)

Data bit 3

GND (ground)

Data bit 4

GND

A: Technical Reference

Table A-4 (continued)

Parallel Port

Signal

Data bit 5

GND

Data bit 6

GND

Data bit 7

GND

ACK_L (acknowledge)

GND

BUSY

GND

PE (paper end)

GND

SLCT (select)

Video Port
The video port interface is a standard VGA-compatible 15-pin connector. Onboard video
is supplied by an ATI RAGE IIC VT4 video controller with 2 MB of onboard video
SGRAM. Table A-5 shows the cable pinout assignments for the video port.
Table A-5

Video Port

Signal

Red (analog color signal R)

Green (analog color signal G)

Blue (analog color signal B)

No connection

GND

Fused VCC (+5V)

GND

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Connectors Accessible to the User

Table A-5 (continued)

Video Port

Signal

No connection

DDCDAT

HSYNC (horizontal sync)

VSYNC (vertical sync)

DDCCLK

Universal Serial Bus (USB) Interface
The baseboard provides two stacked USB ports (port 0 on top, port 1 on bottom). The
built-in USB ports permit the direct connection of two USB peripherals without an
external hub. If more devices are required, an external hub can be connected to either of
the built-in ports. Table A-6 shows the cable pinout assignments for the USB connector.
Table A-6

007-4276-001

USB Connector

Signal

Fused VCC (+5V /w overcurrent monitor of both port 0 and 1)

DATAL0 (differential data line paired with DATAH0)

DATAH0 (differential data line paired with DATAL0)

GND

Fused VCC (+5V /w overcurrent monitor of both port 0 and 1)

DATAL1 (differential data line paired with DATAH1)

DATAH1 (differential data line paired with DATAL1)

GND

A: Technical Reference

ICMB Connectors
The external Intelligent Chassis Management Bus (ICMB) provides external access to
ICMB devices that are within the chassis. This allows you to externally access chassis
management functions, alert logs, post-mortem data, and so on. It also provides a
mechanism for chassis power control. Optionally, the server can be configured with an
ICMB adapter board. This board provides two SEMCONN 6-pin connectors to allow
daisy-chained cabling. Table A-7 shows the cable pinout assignments for the ICMB
connectors.
ICMB Connectors

Table A-7
Pin

Signal

No connection

B (negative)

A (positive)

No connection

Ethernet Connector
The system supports one on-board Ethernet connection. Table A-8 shows the cable
pinout assignments for the Ethernet connector.
Ethernet Connector

Table A-8

Signal

TX+

TX-

RX+

NIC termination

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Connectors Accessible to the User

Table A-8 (continued)

Ethernet Connector

Signal

RX-

NIC termination

Speed LED signal

+3.3 V standby (for LED)

Activity LED signal

+3.3 V standby (for LED)

GND

Internal SCA-2 HDD Connector
An SCA-2 connector is used on the primary side of the HDD backplane. The pinout is the
same as SCA-1. Table A-9 shows the cable pinout assignments for the internal SCA-2
HDD connector.
Table A-9

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Internal SCA-2 HDD Connector

Signal Name

Type

Signal Name

Type

12 V Charge

(L)

12 V Ground

(L)

12 V

(S)

12 V Ground

(L)

12 V

(S)

12 V Ground

(L)

12 V

(S)

Mated 1

(S)

Reserved/ESI-1

(S)

-EFW

(L)

Reserved/ESI-2

(S)

DIFFSNS

(L)

-DB(11)

(S)

+DB(11)

(S)

-DB(10)

(S)

+DB(10)

(S)

A: Technical Reference

Table A-9 (continued)

Internal SCA-2 HDD Connector

Signal Name

Type

Signal Name

Type

-DB(9)

(S)

+DB(9)

(S)

-DB(8)

(S)

+DB(8)

(S)

-I/O

(S)

+I/O

(S)

-REQ

(S)

+REQ

(S)

-C/D

(S)

+C/D

(S)

-SEL

(S)

+SEL

(S)

-MSG

(S)

+MSG

(S)

-RST

(S)

+RST

(S)

-ACK

(S)

+ACK

(S)

-BSY

(S)

+BSY

(S)

-ATN

(S)

+ATN

(S)

-DB(P)

(S)

+DB(P)

(S)

-DB(7)

(S)

+DB(7)

(S)

-DB(6)

(S)

+DB(6)

(S)

-DB(5)

(S)

+DB(5)

(S)

-DB(4)

(S)

+DB(4)

(S)

-DB(3)

(S)

+DB(3)

(S)

-DB(2)

(S)

+DB(2)

(S)

-DB(1)

(S)

+DB(1)

(S)

-DB(0)

(S)

+DB(0)

(S)

-DB(P1)

(S)

+DB(P1)

(S)

-DB(15)

(S)

+DB(15)

(S)

-DB(14)

(S)

+DB(14)

(S)

-DB(13)

(S)

+DB(13)

(S)

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Connectors Accessible to the User

Table A-9 (continued)

Internal SCA-2 HDD Connector

Signal Name

Type

Signal Name

Type

-DB(12)

(S)

+DB(12)

(S)

Mated 2

(S)

5 V ground

(L)

5 V charge

(L)

5 V ground

(L)

Spindle sync

(L)

Active LED out

(L)

MTRON

(L)

DLYD_START

(L)

SCSI ID (0)

(L)

SCSI ID (1)

(L)

SCSI ID (2)

(L)

SCSI ID (3)

(L)

External Adaptec Ultra 160/m SCSI
As an option, the server system can support a shielded external SCSI connection. This
connection is on Channel B of the Adaptec AIC-7899 SCSI Ultra 160 controller. Table A-10
shows the cable pinout assignments for the external Adaptec Ultra 160/m SCSI.
Table A-10

007-4276-001

External Adaptec Ultra 160/m SCSI

Signal Name

DP(12)

DM(12)

DP(13)

DM(13)

DP(14)

DM(14)

DP(15)

DM(15)

DAPHP

DAPHM

DP(0)

DM(0)

DP(1)

DM(1)

DP(2)

DM(2)

DP(3)

DM(3)

A: Technical Reference

Table A-10 (continued)

External Adaptec Ultra 160/m SCSI

Signal Name

DP(4)

DM(4)

DP(5)

DM(5)

DP(6)

DM(6)

DP(7)

DM(7)

DAPLP

DAPLM

GND

DIFFSENSE

GND

TERMPWR

GND

ATNP

ATNM

GND

BSYP

BSYM

ACKP

ACKM

RSTP

RSTM

MSGP

MSGM

SELP

SELM

CDP

CDM

REQP

REQM

IOP

IOM

DP(8)

DM(8)

DP(9)

DM(9)

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Connectors Accessible to the User

Table A-10 (continued)

External Adaptec Ultra 160/m SCSI

Signal Name

-DP(10)

-DM(10)

-DP(11)

-DM(11)

AC Power Input
A single IEC320-C13 receptacle is provided at the rear of the server. Use an appropriately
sized power cord and AC main.

007-4276-001

A: Technical Reference

Peripheral Adapter Boards and Connectors
The peripheral adapter boards convert the 50-pin JAE and FFC signal interface
connectors of the 0.5-inch slim line peripherals to a standard 40-pin IDE and 34-pin
floppy cable pinouts. Two unique boards are required, one for the floppy and one for the
CD-ROM.

CD-ROM Connectors
The 40-pin connector for the CD-ROM adapter board is the standard IDE pinout, as
shown in Table A-11.
Table A-11

100

CD-ROM Adapter Board 40 Position IDE Connector

Signal

RSTDRV

GROUND

DD7

DD8

DD6

DD9

DD5

DD10

DD4

DD1

DD3

DD12

DD2

DD13

DD1

DD14

DD0

DD15

GROUND

KEY PIN

DRQ

GROUND

DIOW

GROUND

DIOR

GROUND

IORDY

CSEL

DACK

GROUND

007-4276-001

Peripheral Adapter Boards and Connectors

Table A-11 (continued)

CD-ROM Adapter Board 40 Position IDE Connector

Signal

IRQ

No connection

DA1

No connection

DA0

DA2

CS1P_L

DS3P_L

DHACT_L

GROUND

Table A-12 shows the cable pinout assignments for the CD-ROM adapter board power
connector.
CD-ROM Adapter Board Power Connector

Table A-12
Pin

Signal

GND

+5 Power

Table A-13 shows the cable pinout assignments for the audio connector.
Audio Connector

Table A-13
Pin

Signal

Audio left

GND

Audio right

Table A-14 shows the cable pinout assignments for the CD-ROM JAE connector.
Table A-14

007-4276-001

CD-ROM JAE Connector

Signal

Audio L-Ch

Audio R-Ch

Audio GND

GND

101

A: Technical Reference

Table A-14 (continued)

102

CD-ROM JAE Connector

Signal

RESET-

DD8

DD7

DD9

DD6

DD10

DD5

DD11

DD4

DD12

DD3

DD13

DD2

DD14

DD1

DD15

DD0

DMARQ

GND

/DIOR

DIOW-

GND

IORDY

/DMACK

INTRQ

/IOCS16

DA1

/PDIAG

DA0

DA2

/CS1FX

/CS3FX

/DASP

+5 V

GND

CSEL

GND

RESERV

007-4276-001

Peripheral Adapter Boards and Connectors

Floppy Connectors
Table A-15 shows the cable pinout assignments for the 34-position floppy connector.
Table A-15

007-4276-001

34-Position Floppy Connector Pin-Out

Signal

HD In/ HD Out/ Open

N/C

GND

FD_INDEX_L

GND

Drive select 0

GND

Drive select 1

GND

N/C

GND

Motor on

GND

Direction select

GND

STEP

GND

Write data

GND

Write gate

GND

Track 00

GND

Write protect

GND

Read data

GND

Side one Select

GND

Disk change/ready

103

A: Technical Reference

Table A-16 shows the cable pinout assignments for the floppy adapter board power
connector.
Table A-16

Floppy Adapter Board Power Connector

Signal

+5 power

GND

No connection

Table A-17 shows the cable pinout assignments for the FFC connector.
Table A-17

104

FFC connector

Signal

+5 V

INDEX

+5 V

DRIVE SELECT

+5 V

DISK CHANGE

READY

HD OUT (HD AT HIGHT 10
LEVEL)

MOTOR ON

DIRECT SELECT

STEP

GND

WRITE DATA

GND

WRITE GATE

GND

TRACK 00

WRITE PROTECT

GND

READ DATA

GND

SIDE ONE SELECT

007-4276-001

Baseboard Connectors

Baseboard Connectors
Figure A-1 shows connector locations on the baseboard. This section provides pin
information about the baseboard connectors.
A

B C

D E

F G

J
GG
FF

EE
DD
CC

K
B1

N
O
P
Q
11

R
S
T

Z
U

Figure A-1

007-4276-001

Detailed Diagram of Connector Locations

105

A: Technical Reference

Table A-18 provides a description of baseboard connectors.
Table A-18

Connector Description

Item

Connector

Description

Item

Connector

Description

J1A1

Keyboard and Mouse
Connector

J9F2

Jumper Block

J1B3

Internal USB

J9G1

Jumper Block

J2B1

VRM Connector #3

J9G2

Ultra 160 Wide SCSI
Channel B

J2A2

VRM Connector #4 (VRM U.

J9H1

Ultra 160 Wide SCSI
Channel A

above)

106

J2C1

VRM Connector #2 (VRM
V.
below)

J7J1

Legacy Narrow SCSI
Connector

J3C1

Fan Connector #1

J7H1

SMM Feature Connector

J4C1

Fan Connector #4

J6J1

Legacy Wide SCSI

J3A1

Fan Connector #2

J6F1

Memory Expansion Card
Connector

J4A1

Fan Connector #3

(Top to
bottom)

J4F1

PCI Slot #3 P64-A1

J4G1

PCI Slot #4 P64-A2

J7A1

Processor Connector #4

J4G2

PCI Slot #5 P64-B1

J7B1

Processor Connector #3

J4H1

PCI Slot #6 P64-B2

J7C1

Processor Connector #2

J4H2

PCI Slot #7 P64-B3

J7D1

Processor Connector #1

J4J1

PCI Slot #8 P64-B4

J9B2

Auxiliary Power
Connector

(Top to
bottom)

J2E1

PCI Slot #2 P32-C1

J2D1

PCI Slot #1 P32-C2

J3D1

Hot Plug Indicator Board
Connector (HPIB)

AA.

J9B1

Main Power Connector A BB.

J9D1

Main Power Connector B

CC.

007-4276-001

Baseboard Connectors

Table A-18 (continued)

Connector Description

Item

Connector

Description

Item

Connector

Description

J9E1

IDE Activity Input
Connector

DD.

J1D2

ICMB Connector

J9E4

SMBus Connector

EE.

J1D1

Video

J9E5

IDE Connector

FF.

J1C2

USB

J9E6

Floppy Connector

GG.

J1C1

NIC

J9E3

Front Panel Connector

HH.

(Top to
bottom)

J8F1

IMB Connector

J9F1

Jumper Block

J1A2

Serial Port A

J1B2

Parallel Port

J1B1

Serial Port B

Power Distribution Board Interface Connectors (J9B1, J9D1, J9B2)
The Baseboard receives its main power through two primary and one auxiliary power
connectors. The two main power connectors are identified as J9B1 and J9D1. The
auxiliary power connector, identified as J9B2, provides a power subsystem
communication path, control signals, power supply sense connections, and other
miscellaneous signals that are defined in Table A-19.
Note: The type of connector (in, out, in/out, power, ground) indicated in the following
tables is described from the perspective of the baseboard.

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107

A: Technical Reference

Table A-19 describes the main power connector A (J9B1).
Table A-19

108

Main Power Connector A (J9B1)

Signal

Type

Current Carrying
Capability

Description

12 V

Power

Power supply 12 V

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

VCC

Power

Power supply 5 V

VCC

Power

Power supply 5 V

VCC

Power

Power supply 5 V

VCC

Power

Power supply 5 V

VCC

Power

Power supply 5 V

SB5V

Power

Power supply 5 V standby

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

VCC

Power

Power supply 5 V

VCC

Power

Power supply 5 V

VCC

Power

Power supply 5 V

VCC

Power

Power supply 5 V

VCC

Power

Power supply 5 V

007-4276-001

Baseboard Connectors

Table A-20 describes the main power connector B (J9D1).
Table A-20

007-4276-001

Main Power Connector B (J9D1)

Signal

Type

Current Carrying Capability

Description

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

12 V

Power

Power supply 12 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

VCC3

Power

Power supply 3.3 V

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

Ground

Ground return connection

109

A: Technical Reference

Table A-20 (continued)

Main Power Connector B (J9D1)

Signal

Type

Current Carrying Capability

Description

Ground

Ground return connection

12 V

Power

Power supply 12 V

Table A-21 describes the auxiliary power connector.
Table A-21

110

Auxiliary Power Connector (J9B2)
Current Carrying
Capability

Signal

Type

Description

Ground

5 V Sense

Out

N/A

Sense line feedback to power supply

3.3 V Sense Out

N/A

Sense line feedback to power supply

BMC FAN Out
SPD CTL

N/A

SM PRI
5VSB SCL

In/Out

N/A

Server management I2C bus - clock

SM PRI
In/Out
5VSB SDA

N/A

Server management I2C bus - data

Ground

PWRGD
PS

N/A

Signal from power subsystem
indicating power is stable

PS PWR
ON_L

Out

N/A

Control signal from baseboard to
power supply

Ground

Ground return connection

-12 V

power

Power supply negative 12 V

Key

12 V

power

Power supply 12 V

Ground

Ground return connection

N/A

007-4276-001

Baseboard Connectors

Front Panel Interface (J9E3)
The front panel attaches to a 30-pin header on the baseboard. The header contains reset,
NMI, sleep, and power control buttons, LED indicators, and an IPMB connection. The
table below summarizes the front panel signal pins, including the signal mnemonic,
name, and brief description.
Note: The type of connector (in, out, in/out, power, ground) indicated in Table A-22 is
described from the perspective of the baseboard.
Table A-22

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Front Panel Connector (J9E3)

Signal

Type

Description

SPKR_FP

Out

SPEAKER DATA for the front panel/chassis mounted
speaker.

GROUND

Ground GROUND is the power supply ground.

CHASSIS_INTRUSION In

CHASSIS INTRUSION is connected to the BMC and
indicates that the chassis has been opened.
CHASSIS_INTRUSION is pulled high to +5 V standby
on the baseboard.

FP_HD_ACT*

Out

HARD DRIVE ACTIVITY indicates there is activity on
one of the hard disk controllers in the system.

+5V

Power

+5 V is the 5 volt power supply.

FP_SLP_BTN*

FRONT PANEL SLEEP is connected to the BMC and
causes the system to sleep if supported by the operating
system. FP_SLP_BTN* is pulled high to +5 V on the
baseboard and is intended to be connected to a
momentary-contact push button (connected to
GROUND when pushed) on the system front.

COOL_FLT_LED*

Out

COOLING FAULT LED indicates that either a fan
failure has occurred or the system is approaching an
over-temperature situation. COOL_FLT_LED* is an
output of the BMC.

PWR_LED*

Out

POWER PRESENT LED.

111

A: Technical Reference

Table A-22 (continued)

112

Front Panel Connector (J9E3)

Signal

Type

Description

PWR_FLT_LED*

Out

SYSTEM FAULT indicates that either a power fault or
SCSI drive failure has occurred in the system.

GROUND

Ground GROUND is the power supply ground.

SM_IMB_SDA

In/Out

I2C DATA is the data signal for the IPMB.

FP_NMI_BTN*

FRONT PANEL NMI is connected to a BMC input port,
allowing the front panel to generate an NMI.
FP_NMI_BTN* is pulled high to +5 V on the baseboard
and is intended to be connected to a momentary-contact
push button (connected to GROUND when pushed) on
the system front panel.

SM_IMB_SCL

In/Out

I2C CLOCK is the clock signal for the IPMB.

FP_RST_BTN*

FRONT PANEL RESET is connected to the BMC and
causes a hard reset to occur, resetting all baseboard
devices except for the BMC and BMC. FP_RST_BTN* is
pulled high to +5V on the baseboard, and is intended to
be connected to a momentary-contact push button
(connected to GROUND when pushed) on the system
front panel.

+5V standby

power

+5 V STANDBY is the standby 5 volt power supply.

FP_PWR_BTN*

FRONT PANEL POWER CONTROL is connected to the
BMC and causes the power to toggle (on → off, or off →
on). FP_PWR_BTN* is pulled high to +5 V standby on
the baseboard and is intended to be connected to a
momentary-contact push button (connected to
GROUND when pushed) on the system front panel.

SM_FP_ISOL

SM_FP_ISOL, when asserted, isolates the front panel
SM bus.

GROUND

Ground GROUND is the power supply ground.

FAN_TACH(0)

FAN_TACH signal is connected to the BMC to monitor
the FAN speed.

FAN_TACH(1)

FAN_TACH signal is connected to the BMC to monitor
the FAN speed.

007-4276-001

Baseboard Connectors

Table A-22 (continued)

Front Panel Connector (J9E3)

Signal

Type

Description

FAN_TACH(2)

FAN_TACH signal is connected to the BMC to monitor
the FAN speed.

FAN_TACH(3)

FAN_TACH signal is connected to the BMC to monitor
the FAN speed.

FAN_TACH(4)

FAN_TACH signal is connected to the BMC to monitor
the FAN speed.

FAN_TACH(5)

FAN_TACH signal is connected to the BMC to monitor
the FAN speed.

FAN_TACH(6)

FAN_TACH signal is connected to the BMC to monitor
the FAN speed.

FAN_TACH(7)

FAN_TACH signal is connected to the BMC to monitor
the FAN speed.

RJ45_ACTLED_R

NIC activity LED.

Reserved

Reserved.

SM_PRI_SCL

In/Out

I2C CLOCK is the clock signal for the primary Private
bus.

SM_PRI_SDA

In/Out

I2C DATA is the data signal for the primary Private bus.

Hot-Plug PCI Indicator Board Interface (J3D1)
The hot-plug PCI indicator board (HPIB) contains the necessary LEDs and push button
switches to help the user run PCI hot-plug (PHP) operations.
To indicate slot status, each PHP slot contains a green LED and amber LED. The actual
interpretation of the LEDs depends on the operating system running on the system.
Each PHP slot also has a momentary switch. When you press this switch, the baseboard
notifies the operating system that a PHP operation on the respective slot is requested. If
a PHP operation is supported by the operating system, the user momentarily presses the
switch and then waits for the operating system to signal via the LEDs that the PHP slot
has been disabled. The user can then perform the desired PHP operation on the slot, such
as replacing, removing, or adding a PCI adapter. When the user wants the operating

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113

A: Technical Reference

system to enable and initialize the PHP slot, the user momentarily presses the switch
again.
Note: At this time, the Linux operating system does not support use of the PCI hot-plug
(PHP) feature. If you are running Linux, your system must be turned off before installing
or removing PCI boards. Windows 2000 requires drivers that are PHP compatible in
order to use the PHP feature.
This (active low) switch for the respective slot is routed to the PRSNT1# input to the PCI
hot-plug Controller (PHPC). This switch should not be confused with slot-interlock
switches, which are used in conjunction with mechanical lever designs to prevent access
to an energized PHP slot. The slot interlock inputs into the PHPC are permanently pulled
down to ground and are not accessible through the hot-plug PCI indicator board
interface.
Note: The HW push-button is located on the hot-plug indicator board. Do not use this
button to turn power on and off to the PCI slot. In some instances, pressing this button
interrupts normal operation of the operating system. Instead, turn power off using a
hot-plug PCI application.
The hot-plug PCI indicator board (HPIB) interface contains the necessary signals to drive
the LEDs and receive the push-button signals.
A 20-pin connector is provided on the baseboard for connection to the external HPIB.
Table A-23 shows the cable pinout assignments for the this connector.
Table A-23

114

Hot-Plug Indicator Board Connector Pinout (J3D1)

Connector
Contact

Signal Name

Connector
Contact

Signal Name

Vcc

GROUND

P64_A_SWITCH<0>

P64_A_GRN_LED<1>

P64_A_AMB_LED<0>

P64_A_SWITCH<1>

P64_A_GRN_LED<1>

P64_A_AMB_LED<1>

P64_B_SWITCH<0>

P64_A_GRN_LED<0>

007-4276-001

Baseboard Connectors

Table A-23 (continued)

Hot-Plug Indicator Board Connector Pinout (J3D1)

Connector
Contact

Signal Name

Connector
Contact

Signal Name

P64_B_AMB_LED<0>

P64_B_SWITCH<1>

P64_B_GRN_LED<1>

P64_A_AMB_LED<1>

P64_B_SWITCH<2>

P64_A_GRN_LED<2>

P64_A_AMB_LED<2>

P64_B_SWITCH<3>

P64_A_GRN_LED<3>

P64_A_AMB_LED<3>

Memory Module Interface (J6F1)
Table A-24 describes the cable pinout assignments for the memory module interface.
Table A-24
Pin**

007-4276-001

Signal

Memory Module Interface
Pin

Signal

A001 GND

B001 PIN_B1

A084

GND

B084 MAA9

A002 GND

B002 VCC3

A085

MAA10

B085 VCC3

A003 GND

B003 SYNTH_OUT_ A086
MADPCLK

MAA11

B086 MAA12

A004 GND

B004 VCC3

A087

GND

B087 MAA13

A005 ASCLK

B005 VCC3

A088

MAA14

B088 VCC3

A006 CMD0

B006 ASDATA

A089

MCD_MUXSEL

B089 VCC3

A007 GND

B007 CMD16

A090

GND

B090 VCC3

A008 CMD1

B008 VCC3

A091

BSCLK

B091 VCC3

A009 CMD2

B009 CMD3

A092

MECC12

B092 BSDATA

A010 GND

B010 CMD19

A093

GND

B093 MECC14

A011 CMD17

B011 VCC3

A094

MECC13

B094 VCC3

A012 CMD4

B012 CMD20

A095

MECC15

B095 CMD97

115

A: Technical Reference

116

Table A-24 (continued)

Memory Module Interface

Pin**

Signal

A013 GND

B013 CMD6

A096

GND

B096 CMD96

A014 CMD18

B014 VCC3

A097

CMD112

B097 VCC3

A015 CMD5

B015 CMD21

A098

CMD113

B098 CMD98

A016 GND

B016 CMD23

A099

GND

B099 CMD99

A017 CMD8

B017 VCC3

A100

CMD114

B100 VCC3

A018 CMD7

B018 CMD22

A101

CMD100

B101 CMD116

A019 GND

B019 CMD9

A102

GND

B102 CMD115

A020 CMD25

B020 VCC3

A103

CMD101

B103 VCC3

A021 CMD26

B021 CMD24

A104

CMD117

B104 CMD102

A022 GND

B022 CMD10

A105

GND

B105 CMD103

A023 CMD12

B023 VCC3

A106

CMD118

B106 VCC3

A024 CMD28

B024 CMD11

A107

CMD119

B107 CMD104

A025 GND

B025 CMD27

A108

GND

B108 CMD120

A026 CMD29

B026 VCC3

A109

CMD105

B109 VCC3

A027 CMD14

B027 CMD30

A110

CMD121

B110 CMD106

A028 GND

B028 CMD13

A111

GND

B111

A029 CMD15

B029 VCC3

A112

CMD122

B112 VCC3

A030 CMD31

B030 MECC0

A113

CMD123

B113 CMD108

A031 GND

B031 MECC1

A114

GND

B114 CMD124

A032 MECC2

B032 VCC3

A115

CMD109

B115 VCC3

A033 MECC3

B033 CKE_0

A116

CMD125

B116 CMD110

A034 GND

B034 0_RAS

A117

GND

B117 CMD126

A035 0_WE*

B035 VCC3

A118

GND

B118 VCC3

A036 0_CAS

B036 0_CS0

A119

GND

B119 VCC3

CMD107

007-4276-001

Baseboard Connectors

007-4276-001

Table A-24 (continued)

Memory Module Interface

Pin**

Signal

A037 GND

B037 0_CS1

A120

CMD111

B120 VCC3

A038 0_CS2

B038 VCC3

A121

CMD127

B121 CKE_1

A039 0_CS3

B039 0_MCDOE*

A122

GND

B122 1_RAS

A040 GND

B040 MEMPRSNT

A123

1_WE*

B123 VCC3

A041 0_MCDSEL*

B041 VCC3

A124

1_CAS

B124 1_CS0

A042 GND

B042 TMD0

A125

GND

B125 1_CS1

A043 GND

B043 VCC3

A126

1_CS2

B126 VCC3

A044 CMD34

B044 VCC3

A127

1_CS3

B127 1_MCDOE*

A045 CMD50

B045 CMD49

A128

GND

B128 1_MCDSEL*

A046 GND

B046 CMD54

A129

CMD80

B129 VCC3

A047 CMD52

B047 VCC3

A130

MECC8

B130 MECC10

A048 CMD51

B048 CMD33

A131

GND

B131 CMD64

A049 GND

B049 CMD32

A132

CMD81

B132 VCC3

A050 CMD40

B050 VCC3

A133

MECC9

B133 MECC11

A051 CMD38

B051 CMD53

A134

GND

B134 CMD65

A052 GND

B052 CMD36

A135

CMD66

B135 VCC3

A053 CMD35

B053 VCC3

A136

CMD82

B136 CMD85

A054 CMD42

B054 CMD58

A137

GND

B137 CMD67

A055 GND

B055 CMD39

A138

CMD83

B138 VCC3

A056 GND

B056 VCC3

A139

CMD84

B139 CMD68

A057 GND

B057 VCC3

A140

GND

B140 CMD71

A058 CMD55

B058 VCC3

A141

CMD87

B141 VCC3

A059 CMD37

B059 CMD43

A142

CMD70

B142 CMD86

A060 GND

B060 CMD57

A143

GND

B143 CMD69

117

A: Technical Reference

118

Table A-24 (continued)

Memory Module Interface

Pin**

Signal

A061 CMD56

B061 VCC3

A144

CMD73

B144 VCC3

A062 CMD62

B062 CMD63

A145

CMD89

B145 CMD72

A063 GND

B063 CMD61

A146

GND

B146 CMD88

A064 CMD44

B064 VCC3

A147

CMD76

B147 VCC3

A065 CMD60

B065 CMD41

A148

CMD92

B148 CMD75

A066 GND

B066 MECC6

A149

GND

B149 CMD91

A067 CMD47

B067 VCC3

A150

CMD74

B150 VCC3

A068 CMD48

B068 CMD59

A151

CMD90

B151 CMD78

A069 GND

B069 CMD45

A152

GND

B152 CMD77

A070 CMD46

B070 VCC3

A153

CMD94

B153 VCC3

A071 MECC7

B071 MECC4

A154

CMD93

B154 CMD79

A072 GND

B072 MECC5

A155

GND

B155 CMD95

A073 GND

B073 VCC3

A156

GND

B156 VCC3

A074 MADPCLK_F B074 VCC3
B_DLY

A157

GND

B157 VCC3

A075 GND

B075 BCLK_MADP_ A158
OUT

GND

B158 VCC3

A076 MAA0

B076 VCC3

A159

GND

B159 VCC3

A077 MAA1

B077 VCC3

A160

GND

B160 VCC3

A078 GND

B078 SDRDCLK_HE A161
_DLY

GND

B161 VCC3

A079 MAA2

B079 VCC3

A162

GND

B162 RESERVED162

A080 MAA3

B080 MAA4

A163

GND

B163 VCC

A081 GND

B081 MAA5

A164

GND

B164 VCC

007-4276-001

Baseboard Connectors

Table A-24 (continued)

Memory Module Interface

Pin**

Signal

A082 MAA6

B082 VCC3

A165

PIN_A165

B165 VCC

A083 MAA7

B083 MAA8

A166

B166 NC

*Signal active low.
**Pins are numbered with respect to the module edge connector. Axx signals appear on
the front (processor side) of the processor card.

Processor Module Connector (J7A1, J7B1, J7C1, J7D1)
Table A-25 describes the cable pinout assignments for the processor card connector.
Table A-25
Pin**

007-4276-001

Processor Card Connector (J7A1, J7B1, J7C1, J7D1)

Signal

A001 RESERVED (nc) B001 PWR_EN1

A084 GND

B084 RESERVED (nc)

A002 VCC_TAP

A085 D11*

B085 VCCP

A003 RESERVED (nc) B003 OCVR_OK*

A086 D10*

B086 D17*

A004 GND

B004 TEST_VSS_B4

A087 GND

B087 D15*

A005 VTT

B005 VCCP

A088 D14*

B088 VCCP

A006 VTT

B006 VTT

A089 D9*

B089 D12*

A007 SELFSB1

B007 VTT

A090 GND

B090 D7*

A008 RESERVED_A8

B008 VCCP

A091 D8*

B091 VCCP

A009 RESERVED_A9

B009 RESERVED (nc) A092 D5*

B092 D6*

A010 GND

B010 FLUSH*

A093 GND

B093 D4*

A011 TEST_GND (pd) B011 VCCP

A094 D3*

B094 VCCP

A012 IERR*

B012 SMI*

A095 D1*

B095 D2*

A013 GND

B013 INIT*

A096 GND

B096 D0*

B002 VCCP

119

A: Technical Reference

Processor Card Connector (J7A1, J7B1, J7C1, J7D1)

Table A-25 (continued)
Pin**

Signal

A014 A20M*

B014 VCCP

A097 BCLK

B097 VCCP

A015 FERR*

B015 STPCLK*

A098 TEST_VSS
(pd)

B098 RESET*

A016 GND

B016 TCK

A099 GND

B099 FRCERR

A017 IGNNE*

B017 VCCP

A100 BERR*

B100 VCCP

A018 TDI

B018 SLP*

A101 A33*

B101 A35*

A019 GND

B019 TMS

A102 GND

B102 A32*

A020 TDO

B020 VCCP

A103 A34*

B103 VCCP

A021 PWRGOOD

B021 TRST*

A104 A30*

B104 A29*

A022 GND

B022 RESERVED (nc) A105 GND

B105 A26*

A023 TEST_25 (pu)*** B023 VCCP

120

A106 A31*

B106 VCCL2

A024 THERMTRIP*

B024 RESERVED (nc) A107 A27*

B107 A24*

A025 GND

B025 RESERVED (nc) A108 GND

B108 A28*

A026 OCRV_EN

B026 VCCP

A109 A22*

B109 VCCL2

A027 INTR

B027 TEST_VCCP
(pu)

A110 A23*

B110 A20*

A028 GND

B028 NMI

A111 GND

B111

A029 PICD0

B029 VCCP

A112 A19*

B112 VCCL2

A030 PREQ*

B030 PICCLK

A113 A18*

B113 A25*

A031 GND

B031 PICD1

A114 GND

B114 A15*

A032 BP3*

B032 VCCP

A115 A16*

B115 VCC_L2

A033 BMP0*

B033 BP2*

A116 A13*

B116 A17*

A034 GND

B034 RESERVED (nc) A117 GND

B117 A11*

A035 BINIT*

B035 VCCP

A118 A14*

B118 VCC_L2

A036 DEP0*

B036 PRDY*

A119 GND

B119 A12*

A21*

007-4276-001

Baseboard Connectors

Processor Card Connector (J7A1, J7B1, J7C1, J7D1)

Table A-25 (continued)
Pin**

007-4276-001

Signal

A037 VSS

B037 BPM1*

A120 A10*

B120 VCCL2

A038 DEP1*

B038 VCCP

A121 A5*

B121 A8*

A039 DEP3*

B039 DEP2*

A122 GND

B122 A7*

A040 GND

B040 DEP4*

A123 A9*

B123 VCCL2

A041 DEP5*

B041 VCCP

A124 A4*

B124 A3*

A042 DEP6*

B042 DEP7*

A125 GND

B125 A6*

A043 GND

B043 D62*

A126 RESERVED
(nc)

B126 VCCL2

A044 D61*

B044 VCCP

A127 BNR*

B127 AERR*

A045 D55*

B045 D58*

A128 GND

B128 REQ0*

A046 GND

B046 D63*

A129 BPRI*

B129 VCCL2

A047 D60*

B047 VCCP

A130 TRDY*

B130 REQ1*

A048 D53*

B048 D56*

A131 GND

B131 REQ4*

A049 GND

B049 D50*

A132 DEFER*

B132 VCCL2

A050 D57*

B050 VCCP

A133 REQ2*

B133 LOCK*

A051 D46*

B051 D54*

A134 GND

B134 DRDY*

A052 GND

B052 D59*

A135 REQ3*

B135 VCCL2

A053 D49*

B053 VCCP

A136 HITM*

B136 RS0*

A054 D51*

B054 D48*

A137 GND

B137 HIT*

A055 GND

B055 D52*

A138 DBSY*

B138 VCCL2

A056 CPU_SENSE

B056 VCCP

A139 RS1*

B139 RS2*

A057 GND

B057 L2_SENSE

A140 GND

B140 RP*

A058 D42*

B058 VCCP

A141 BR2*

B141 VCCL2

A059 D45*

B059 D41*

A142 BR0*

B142 BR3*

121

A: Technical Reference

Processor Card Connector (J7A1, J7B1, J7C1, J7D1)

Table A-25 (continued)
Pin**

122

Signal

A060 GND

B060 D47*

A143 GND

B143 BR1*

A061 D39*

B061 VCCP

A144 ADS*

B144 VCCL2

A062 TEST_25 (pu)*** B062 D44*

A145 AP0*

B145 RSP*

A063 GND

B063 D36*

A146 GND

B146 AP1*

A064 D43*

B064 VCCP

A147 VID2_CORE

B147 VCCL2

A065 D37*

B065 D40*

A148 VID1_CORE

B148 RESERVED (nc)

A066 GND

B066 D34*

A149 GND

B149 VID3_CORE

A067 D33*

B067 VCCP

A150 VID4_CORE

B150 VCCL2

A068 D35*

B068 D38*

A151 RESERVED
(nc)

B151 VID0_CORE

A069 GND

B069 D32*

A152 GND

B152 VID0_L2

A070 D31*

B070 VCCP

A153 VID2_L2

B153 VCCL2

A071 D30*

B071 D28*

A154 VID1_L2

B154 VID4_L2

A072 GND

B072 D29*

A155 GND

B155 VID3_L2

A073 D27*

B073 VCCP

A156 VTT

B156 VCCL2

A074 D24*

B074 D26*

A157 VTT

B157 VTT

A075 GND

B075 D25*

A158 GND

B158 VTT

A076 D23*

B076 VCCP

A159 SA2

B159 VCCL2

A077 D21*

B077 D22*

A160 VCC3.3

B160 SCLK

A078 GND

B078 D19*

A161 GND

B161 SDAT

A079 D16*

B079 VCCP

A162 SA1

B162 VCCL2

A080 D13*

B080 D18*

A163 SA0

B163 RESERVED (nc)

A081 GND

B081 D20*

A164 GND

B164 RESERVED (nc)

007-4276-001

Baseboard Connectors

Processor Card Connector (J7A1, J7B1, J7C1, J7D1)

Table A-25 (continued)
Pin**

Signal

A082 TEST_VTT (pu)

Signal

B082 VCCP

Signal

A165 PWR_EN0

Signal

B165 RESERVED (nc)

A083 RESERVED (nc) B083 RESERVED (nc)

* Signal is active low.
** Pins are numbered with respect to the module edge connector. Axx signals appear on
the front (processor side) of the processor card.
***Signals that have no connection except for a pull-up resistor to 2.5 V are labeled with
the signal mnemonic followed by “(pu).”

Processor Termination, Regulation, and Power
The termination circuitry required by the Intel Pentium III Xeon processor bus (AGTL+)
signaling environment and the circuitry to set the AGTL+ reference voltage are
implemented directly on the processor cards. The baseboard provides 1.5 V AGTL+
termination power (VTT), and VRM 8.3-compliant DC-to-DC converters to provide
processor power (VCCP) at each connector.
The baseboard provides four embedded VRMs and three VRM sockets to power the
processors, which derive power from the 5 V and 12 V supplies. Each processor has a
separate VRM to power its core; however, two processors share a VRM to power their
cache.
Table A-26 shows the cable pinout assignments for the three VRM connectors.
Table A-26

007-4276-001

Processor VRM Connectors (J2A2, J2B1, J2C1)

Signal

Type*

P5VIN1

POWER

P5VIN2

POWER

P5VIN3

POWER

P12VIN1

POWER

123

A: Technical Reference

Table A-26 (continued)

124

Processor VRM Connectors (J2A2, J2B1, J2C1)

Signal

Type*

P12VIN3

POWER

P1SHARE

VID0

OUT

VID2

OUT

VID4

OUT

A10

VCCP1

POWER

A11

VSS1

POWER

A12

VCCP2

POWER

A13

VSS2

POWER

A14

VCCP3

POWER

A15

VSS3

POWER

A16

VCCP4

POWER

A17

VSS4

POWER

A18

VCCP5

POWER

A19

VSS5

POWER

A20

VCCP6

POWER

P5VIN4

POWER

P5VIN5

POWER

P5VIN6

POWER

P12VIN2

POWER

RES

OUTEN

OUT

VID1

OUT

VID3

OUT

007-4276-001

Baseboard Connectors

Table A-26 (continued)

Processor VRM Connectors (J2A2, J2B1, J2C1)

Signal

Type*

PWRGOOD

B10

VSS6

POWER

B11

VCCP7

POWER

B12

VSS7

POWER

B13

VCCP8

POWER

B14

VSS8

POWER

B15

VCCP9

POWER

B16

VSS9

POWER

B17

VCCP10

POWER

B18

VSS10

POWER

B19

VCCP11

POWER

B20

VSS11

POWER

*Type (in/out) is from the perspective of the baseboard.

Termination Card
You must install a termination card in any vacant processor card slot to ensure reliable
system operation.
The termination card contains AGTL+ termination circuitry, clock signal termination,
and test access port (TAP) bypassing for the vacant connector. The system does not boot
unless all slots are occupied with a processor or termination card.

Server Monitor Module Connector (J7H1)
The baseboard supports the server monitor module (SMM) feature connector. Table A-27
shows the pinout of the 26-pin baseboard connector.

007-4276-001

125

A: Technical Reference

On the baseboard, pins 1, 9, 15, and 17 are connected to SMI_L, NMI, SECURE_MODE,
and CHASSIS_INTRUSION. Some server systems do not monitor these signals.
Note: The type of connector (in, out, in/out, power, ground) indicated in Table A-27 is
described from the perspective of the baseboard.
Table A-27

126

Server Monitor Module Connector Pinout

Pin Signal

Type

Description-Implementation

SMI_L

Out

System management interrupt: not supported on SMM

I2C_SCL

I2C clock line

CONP_L

Out

Connector present: tied to ground on the baseboard

Reserved

PWR_CNTL_L

I2C_SDA

In/Out I2C serial data line

5VSTNDBY

Out

Reserved

NMI

Out

Non-maskable interrupt: not supported on SMM

HOST_AUX

Out

Baseboard voltage monitored by SMM card: connected to
3.3 V

RESET_L

Baseboard reset signal from SMM

GROUND

Ground Ground

GROUND

Ground Ground

Key

SECURE_MODE

Out

GROUND

Ground Ground

CHASSIS_INTRUSION Out

Reserved pin: NC on baseboard
Power supply on/off control: allows SMM to control
system power

+5 V standby: monitored by SMM to determine if AC
power is applied
Pulled up to 5 V through 10k on baseboard

No connect on baseboard
Secure mode indication: not supported on SMM

Chassis intrusion indication: not supported on SMM

007-4276-001

Baseboard Connectors

Table A-27 (continued)
Pin Signal

Server Monitor Module Connector Pinout
Type

Description-Implementation

Reserved

Reserved pin: NC on baseboard

Reserved

Reserved pin: NC on baseboard

GROUND

Reserved

Reserved pin: NC on baseboard

Reserved

Reserved pin: NC on baseboard

Reserved

Reserved pin: NC on baseboard

Reserved

Reserved pin: NC on baseboard

Key

No connect on baseboard

Reserved

Reserved pin: NC on baseboard

Ground Ground

SM Bus Connector (J9E4)
This connector allows connection to the Memory Module I2C bus on which the DIMMs
EEPROMs reside. A shorted I2C connection at the SM Bus I2C connector will prevent the
system BIOS from sizing and configuring main memory. Table A-28 shows the cable
pinout assignments for the SM bus connector.
Table A-28

SM Bus Connector (J9E4)

Signal

Description

Local I2C SDA

OSB4 SM bus data line

GROUND

Local I2C SCL

OSB4 SM bus data line

ICMB Connector (J1D2)
The external Intelligent Chassis Management Bus (ICMB) provides external access to
ICMB devices that are within the chassis. For example, you can externally access chassis
management functions, alert logs, and post-mortem data. The ICMB connector also

007-4276-001

127

A: Technical Reference

provides a mechanism for chassis power control. As an option, you can configure a
server with an ICMB adapter board to provide two SEMCONN 6-pin connectors for
daisy-chained cabling. Table A-29 shows the cable pinout assignments for the ICMB
connector.
Table A-29

ICMB Connector (J1D2)

Signal

Type

Description

SDA

signal

IPMB I2C Data

Ground

power

SCL

signal

5 V standby

power

IPMB I2C Clock

Auxiliary I2C Connector (J9E4)
The baseboard provides a 3-pin auxiliary I2C connector for OEM access to the IPMB. This
connector is not isolated when power is off. Any devices connected must remain
powered in this state or the BMC will not work properly.
A shorted I2C connection at the auxiliary I2C connector will prevent restoration of main
power because the BMC needs the bus to boot the server from standby power. Table A-30
shows the cable pinout assignments for the IMB connector.
Table A-30

IMB Connector (J8F1)

Signal

Description

Local I2C SDA

BMC IMB 5VSTNDBY clock line

GROUND

Local I2C SCL

BMC IMB 5VSTNDBY data line

Baseboard Fan Connectors (J3C1, J3A1, J4A1, J4C1)
There are four fan connectors located on the baseboard. Use these connectors are for
additional processor cooling.

128

007-4276-001

Baseboard Connectors

The baseboard only supports monitoring a total of eight tachometer fan inputs. The front
panel connector provides connections to all eight tachometer fan inputs. The tachometer
signals from these four processor fan connectors are connected to the same tachometer
fan signals FAN_TACH(4), FAN_TACH(5), FAN_TACH(6), and FAN_TACH(7)
provided on the front panel connector J9E3. Therefore, make sure that only one
connection is used at any given time.
Note: The type of connector (in, out, in/out, power, ground) indicated in the following
tables is described from the perspective of the baseboard.
Table A-31 describes the processor fan connector #1 (J3C1).
Table A-31

Processor Fan Connector #1 (J3C1)

Signal

Type

Description

Ground

power

GROUND is the power supply ground

12V

power

Power supply 12 V

Fan Tach

Out

FAN_TACH signal is connected to the BMC to monitor the
FAN speed

Table A-32 describes the processor fan connector #2 (J3A1).
Table A-32

007-4276-001

Processor Fan Connector #2 (J3A1)

Signal

Type

Description

Ground

power

GROUND is the power supply ground

12V

power

Power supply 12 V

Fan Tach

Out

FAN_TACH signal is connected to the BMC to monitor the
FAN speed

129

A: Technical Reference

Table A-33 describe the processor fan connector #3 (J4A1).
Table A-33

Processor Fan Connector #3 (J4A1)

Signal

Type

Description

Ground

Power

GROUND is the power supply ground

12V

Power

Power supply 12 V

Fan Tach

Out

FAN_TACH signal is connected to the BMC to monitor the
FAN speed

Table A-34 describe the processor fan connector #4 (J4C1).
Table A-34

Processor Fan Connector #4 (J4C1)

Signal

Type

Description

Ground

Power

GROUND is the power supply ground

12V

Power

Power supply 12 V

Fan Tach

Out

FAN_TACH signal is connected to the BMC to monitor the
FAN speed

Internal Disk Drive LED Connection
Table A-35 shows the cable pinout assignment for the internal disk drive LED connector.
Table A-35

130

Internal Disk Drive LED Connector

Signal

Description

No connect

Activity signal

5 V, high true activity signal

Activity signal

Same as pin 2 (Shorted to pin 2)

No connect

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Baseboard Jumpers

JP4

JP3

5 6

JP2

9 10 11

JP1

13 14 15

J9F2

One 15-pin, one 11-pin, and one 3-pin single inline header provide a total of eight 3-pin
jumper blocks that control various configuration options. The jumper locations are
shown in Figure A-2. The shaded areas show default jumper placement for each
configurable option.

Figure A-2

Baseboard Configuration Jumpers

A. PCI Add-in slots
B. Processors
C. Configuration jumpers

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131

A: Technical Reference

Table A-36 identifies jumpers JP1, JP2, JP3, and JP4.
Table A-36

Configuration Jumper Settings

Callout

Name

State

Location

JP1

BMC boot block write
Enable

Disable

13 - 14

Enable

14 - 15

BIOS recovery boot

Disable

9 - 10

Enable

10 - 11

Protect

5-6

Erase

6-7

BMC control

1-2

Force erase

2-3

JP2

JP3

JP4

Password clear

CMOS clear

Table A-37 describes the jumper settings for jumpers JP2, JP3, and JP4.
Table A-37

132

Configuration of Jumpers

Option

Description

CMOS

If pins 1 and 2 of J9F2 are jumpered (default), NVRAM contents are preserved
through system reset unless the user clears them through the front panel (by
pressing the power and reset buttons at the same time for four seconds). If pins 2
and 3 of J9F2 are jumpered, NVRAM contents are set to manufacturing default
during system reset. If the jumper is removed, NVRAM contents are preserved
through system reset.

Password

If pins 5 and 6 of J9F2 are jumpered (default), the current system password is
maintained during system reset. If pins 6 and 7 are jumpered, the password is
cleared on reset.

BIOS
recovery

If pins 9 and 10 of J9F2 are jumpered (default), BIOS jumps to a protected area of the
flash part containing the “Recovery BIOS.” If the normal BIOS gets corrupted, and
you are unable to reload a fresh copy from the floppy disk, install the jumper
between pins 10 and 11 of J9F2, which enables the system to boot from the Recovery
BIOS. This code expects a fresh copy of the normal BIOS to be located on a floppy
disk in the floppy drive.

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Changing Jumper Settings

Changing Jumper Settings
Follow the instructions in this section to change the settings for the CMOS clear jumper
(JP4), the password clear jumper (JP3), and the recovery boot jumper (JP2).
Observe the following safety and ESD precautions before changing jumper settings:

Caution: Always handle boards carefully. They can be extremely sensitive to ESD. Hold
boards only by their edges. After removing a board from its protective wrapper or from
the system, place it component-side upon a grounded, static-free surface. If you place the
baseboard on a conductive surface, the battery leads may short out. If they do, this will
result in a loss of CMOS data and will drain the battery. Use a conductive foam pad if
available but not the board wrapper. Do not slide the board over any surface.

Caution: A jumper is a small, plastic-encased conductor that slips over two jumper pins.
Newer jumpers have a small tab on top that you can grip with your fingertips or with a
pair of fine, needle-nosed pliers. If your jumpers do not have such a tab, take care when
using needle-nosed pliers to remove or install a jumper; grip the narrow sides of the
jumper with the pliers. Never grip the wide sides because this can damage the contacts
inside the jumper, causing intermittent problems with the function controlled by that
jumper. Take care to gently grip, but not squeeze, with the pliers or other tool you use to
remove a jumper; you might bend or break the stake pins on the board.

CMOS Clear Jumper
The jumper at pins 1, 2, and 3 controls whether settings stored in CMOS nonvolatile
memory (NVRAM) are retained during a system reset. The jumper is used to restore the
system's CMOS and RTC to default values, as follows:

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133

A: Technical Reference

There are two methods to restore the default values.
Method 1
1.

Hold down the system's reset button down for five seconds.

2. While continuing to hold down the system's reset button, press the power button.
3. Release both the reset and power buttons at the same time.
Method 2
1.

Observe the safety and ESD precautions at the beginning of this section.

2. Turn off all connected peripherals, turn off system power, and disconnect all AC
power cords.
3. If the baseboard is installed in a system, remove access covers so that you have
access to the baseboard.
4. Remove the memory module. See “Removing the Memory Module” on page 55.
5. Locate the configuration jumpers at the edge of the baseboard next to the memory
expansion card connector (MECC). See Figure A-2 on page 131 for the location of
the configuration jumpers.
6. Move the CMOS jumper from pins 1 and 2 to pins 2 and 3 (the Clear CMOS
memory position).
7. If the baseboard is installed in a system, reinstall the access covers, connect the
power cords, and turn on the system for the change to take effect.
8. You may need to repeat these steps to move the jumper back to its original setting,
depending on the jumper function.
9. Wait for POST to complete and for the messages NVRAM cleared by jumper and
Press F1 to resume, Press F2 to Setup to be displayed. This
automatically reprograms CMOS and RTC to their default settings, except for the
password.
10. Enter Setup and make any changes necessary (for example, changing the boot
device). Press F10 to save the new Setup configuration and exit Setup.
11. Turn off the system, and disconnect all AC power cords from the system.
12. Move the jumper from pins 2 and 3 back to pins 1 and 2 (the Protect CMOS memory
position).

134

007-4276-001

Changing Jumper Settings

13. If the baseboard is installed in a system, reinstall the access covers, connect the
power cords, and turn on the system for the change to take effect.
14. Run BIOS Setup or the SSU to verify the correct settings. See Chapter 3 in the SGI
1450 Server User’s Guide.

Password Clear Jumper
The jumper at pins 5, 6, and 7 controls whether a stored password is retained or cleared
during a system reset.
Follow these steps to clear the current password and then enter a new one:
1.

Observe the safety and ESD precautions at the beginning of this section.

2. Turn off all connected peripherals, turn off system power, and disconnect all AC
power cords.
3. If the baseboard is installed in a system, remove access covers so that you have
access to the baseboard.
4. Remove the memory module. See “Removing the Memory Module” on page 55.
5. Locate the configuration jumpers at the edge of the baseboard next to the memory
expansion card connector (MECC). See Figure A-2 on page 131 for the location of
the configuration jumpers.
6. Move the password jumper from pins 5 and 6 to pins 6 and 7.
7. If the baseboard is installed in a system, reinstall the access covers, connect the
power cords, and turn on the system for the change to take effect.
8. Wait for POST to complete and for the message Press F1 to resume, Press
F2 to Setup to be displayed.
9. Turn off the system, and disconnect all AC power cords from the system.
10. Move the jumper from pins 6 and 7 back to pins 5 and 6.
11. If the baseboard is installed in a system, reinstall the access covers, connect the
power cords, and turn on the system for the change to take effect.
12. Run BIOS Setup or the SSU to specify a new password. See Chapter 3 in the SGI
1450 Server User’s Guide.

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135

A: Technical Reference

Recovery Boot Jumper
The jumper at pins 9, 10, and 11 controls whether the system attempts to boot using the
BIOS programmed in flash memory.
Follow these steps to disable recovery booting:
1.

Observe the safety and ESD precautions at the beginning of this section.

2. Turn off all connected peripherals, turn off system power, and disconnect all AC
power cords.
3. If the baseboard is installed in a system, remove access covers so that you have
access to the baseboard.
4. Remove the memory module. See “Removing the Memory Module” on page 55.
5. Locate the configuration jumpers at the edge of the baseboard next to the memory
expansion card connector (MECC). See Figure A-2 on page 131 for the location of
the configuration jumpers.
6. Move the recovery boot jumper from pins 9 and 10 to pins 10 and 11.
7. If the baseboard is installed in a system, reinstall the access covers, connect the
power cords, and turn on the system for the change to take effect.
8. Turn on the system, and insert the Flash Memory Update Utility diskette in drive A.
After the system boots, the recovery process starts. This takes about three minutes.
When the recovery process completes, the speaker emits two beeps.
While in the recovery mode, there is no screen display on the monitor. The keyboard is
disabled as the system automatically recovers the BIOS. Table A-38 lists the beep code
messages.
Table A-38

136

Beep Codes

Beep Code

Message

Successful completion, no errors.

The system could not boot from the diskette. The diskette may not be
bootable.

Continuous series
of low beeps

The wrong BIOS recovery files are being used and/or the flash memory
jumper is in the wrong position.

007-4276-001

Interrupts

9. Wait for POST to complete and for the message Press F1 to resume, Press
F2 to Setup to be displayed.
10. Turn off the system, and disconnect all AC power cords from the system.
11. Move the jumper from pins 6 and 7 back to pins 5 and 6.
12. If the baseboard is installed in a system, reinstall the access covers, connect the
power cords, and turn on the system for the change to take effect.
13. After running the special recovery mode, run the SSU to specify a new password.
See Chapter 3 in the SGI 1450 Server User’s Guide.

Interrupts
Table A-39 recommends the logical interrupt mapping of interrupt sources; it reflects a
typical configuration, but a user can change these interrupts. Use the information to
determine how to program each interrupt. The actual interrupt map is defined using
configuration registers in the OSB4 I/O controller. I/O redirection registers in the I/O
APIC are provided for each interrupt signal; the signals define hardware interrupt signal
characteristics for APIC messages sent to local epics.
Note: If you plan to disable the IDE controller to reuse the interrupt for that controller,
you must physically unplug the IDE cable from the board connector (IDE0) if a cable is
present. Simply disabling the drive by configuring the SSU option does not make the
interrupt available.
Table A-39

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Interrupt Definitions

ISA Interrupt

Description

INTR

Processor interrupt

NMI

NMI to processor

IRQ1

Keyboard interrupt

IRQ3

Serial port A or B interrupt from SIO device, user-configurable

IRQ4

Serial port A or B interrupt from SIO device, user-configurable

IRQ5

Parallel port

137

A: Technical Reference

Table A-39 (continued)

Interrupt Definitions

ISA Interrupt

Description

IRQ6

Floppy disk

IRQ7

Parallel port

IRQ8_L

Active low RTC interrupt

IRQ9
IRQ10
IRQ11
IRQ12

Mouse interrupt

IRQ14

Compatibility IDE interrupt from primary channel IDE devices 0 and 1

IRQ15

Reserved

SMI

System Management Interrupt. General purpose indicator is sourced by the
OSB4 and BMC to the processors

SCI

Video Modes
The RAGE IIC chip supports all standard IBM® VGA modes. Table A-40 shows all the
modes that this implementation supports, including the number of colors, resolution,
and refresh rates.

138

Table A-40

Standard VGA Modes

Resolution

Refresh Rate (Hz)

Colors

640x480

200

256

800x600

200

256

1024x768

150

256

1152x864

120

256

1280x1024

100

256

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Video Modes

Table A-40 (continued)

007-4276-001

Standard VGA Modes

Resolution

Refresh Rate (Hz)

Colors

1600x1200

256

640x480

200

65K

800x600

200

65K

1024x768

150

65K

1152x864

120

65K

1280x1024

100

65K

1600x1200

65K

640x480

200

16.7M

800x600

160

16.7M

139

Appendix B

B. Physical Environment Specifications

Table B-1 details the environmental specifications for the SGI 1450 server.
Table B-1

Environmental Specifications

Temperature:
Non-operating

-40° to 70 °C (-104° to 158 °F)

Operating

5° to 35 °C (41° to 95 °F)

Altitude

5,000 ft. max

Humidity

95% relative humidity (non condensing) at 25 °C (77 °F) to
30 °C (86 °F)

Shock:
Operating

2.0 g, 11 msec, 1/2 sine, 100 pulses in each direction

Packaged

Trapezoidal, 30 g, 170 inches/sec. delta V, 3 drops in each
direction on each of the three axes

Acoustic noise

< 55 dBA with three power supplies at 28 °C +/- 2 °C

Electrostatic discharge
(ESD)

Tested to 15 kilovolts (kV) air discharge and up to 8 kV
contact discharge

System AC input power:

007-4276-001

100-120 V~

6 A, 50/60 Hz

200-240 V~

4 A, 50/60 Hz

141

Index

AC power, LED state status, 14
add-in board
installing 32-bit, 33 MHz half-length PCI board, 66
installing 64-bit, 66/33 MHz hot-plug PCI board,
69
removing 32-bit, 33 MHz half-length PCI board, 65
removing 64-bit, 66/33 MHz hot-plug PCI board,
67
address
base memory, 54
extended memory, 54

fan LED state status, 16

H
hard drive backplane
boardset, 11
requirements, 10
hard drive, LED state status, 11

I
B
base memory, 54

D
DC power cables, 14
DIMM (memory)
bank population, 54
installing, 56
removing, 56

E
extended memory, 54

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ICMB card
description, 70
installing, 71
removing, 73
ICMB connectors, 94
installing
32-bit, 33 MHz half-length PCI board, 66
64-bit, 66/33 MHz hot-plug PCI board, 69
baseboard, 31
DIMMs, 56
drive in media bay, 46
fan board assembly, 40
fans, 42
front cover, 24
hard drive bay, 44
ICMB card, 71
memory module, 55

143

Index

memory retention bar, 27
power subsystem bay, 37
power supply module, 35
processor, 59
processor handles, 60
processor heatsink, 60
processor retention mechanism, 60
top cover, 25
VRMs, 62
interrupt, mapping, 137

P
peripheral adapter boards, 100
processor
installing, 59
installing handles, 60
installing heatsink, 60
installing retention mechanism, 60
removing, 59
removing retention mechanism, 59
termination card, 125

J
R
jumpers
changing settings, 133
configuration, 132
location on baseboard, 131

L
LED state status
AC power, 14
fans, 16
hard drive, 11

M
memory
addresses, 53
bank population, 54
base, 54
capacity, 54
extended, 54
installing DIMMs, 56
installing memory module, 55
minimum configuration, 53
removing DIMMs, 56
removing memory module, 55

144

removing
32-bit, 33 MHz half-length PCI board, 65
64-bit, 66/33 MHz hot-plug PCI board, 67
baseboard, 28
DIMMs, 56
drive from media bay, 45
fan board assembly, 39
fans, 42
front cover, 23
hard drive bay, 43
ICMB card, 73
memory module, 55
memory retention bar, 26
power subsystem bay, 36
power supply module, 35
processor, 59
processor retention mechanism, 59
top cover, 25
VRMs, 62
replacing
drive in device bay, 46
fan board, 40
resetting, commands, 75

007-4276-001

Index

S
SCSI
controllers, 17
optional external connector, 97

T
Technical Publications Library, obtaining SGI
documentation, xv

V
voltage regulator modules
installing, 62
removing, 62
VRM/processor population sequencing, 61

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145

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