Compaq GS320, GS80, GS160 User Manual

AlphaServer GS80/160/320

User’s Guide

Order Number: EK-GS320-UG. C01

This guide is intended for those who manage, operate, or service the AlphaServer GS160/320 system and the AlphaServer GS80 rack system. It covers configuration guidelines, operation, system management, and basic troubleshooting.

Compaq Computer Corporation

Revised September 2000

COMPAQ, the Compaq logo, and AlphaServer registered in U.S. Patent and Trademark Office. OpenVMS, StorageWorks, and Tru64 are trademarks of Compaq Information Technologies Group, L.P.

Portions of the software are © copyright Cimetrics Technology. Linux is a registered trademark of Linus Torvalds in several countries. UNIX is a registered trademark of The Open Group in the U.S. and other countries. All other product names mentioned herein may be trademarks of their respective companies.

Compaq shall not be liable for technical or editorial errors or omissions contained herein. The information in this document is subject to change without notice.

FCC Notice

This equipment generates, uses, and may emit radio frequency energy. The equipment has been type tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of FCC rules, which are designed to provide reasonable protection against such radio frequency interference.

Operation of this equipment in a residential area may cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference.

Any modifications to this device—unless expressly approved by the manufacturer—can void the user’s authority to operate this equipment under part 15 of the FCC rules.

Modifications

The FCC requires the user to be notified that any changes or modifications made to this device that are not expressly approved by Compaq Computer Corporation may void the user's authority to operate the equipment.

Cables

Connections to this device must be made with shielded cables with metallic RFI/EMI connector hoods in order to maintain compliance with FCC Rules and Regulations.

Taiwanese Notice

Japanese Notice

Canadian Notice

This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

Avis Canadien

Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

European Union Notice

Products with the CE Marking comply with both the EMC Directive (89/336/EEC) and the Low Voltage Directive (73/23/EEC) issued by the Commission of the European Community.

Compliance with these directives implies conformity to the following European Norms (in brackets are the equivalent international standards):

EN55022 (CISPR 22) - Electromagnetic Interference

EN50082-1 (IEC801-2, IEC801-3, IEC801-4) - Electromagnetic Immunity

EN60950 (IEC950) - Product Safety

Achtung!

Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses Gerätes Rundfunkstörungen auftreten, in welchen Fällen der Benutzer für entsprechende Gegenmaßnahmen verantwortlich ist.

Attention!

Ceci est un produit de Classe A. Dans un environnement domestique, ce produit risque de créer des interférences radioélectriques, il appartiendra alors à l'utilisateur de prendre les mesures spécifiques appropriées.

Preface ........................................................................................................................xi

Chapter 1 Introduction

1.1 AlphaServer GS160/320 and GS80 Systems......................................... 1-2

1.2 Firmware and Utilities Overview ......................................................... 1-4

1.3 System Architecture.............................................................................. 1-5

Chapter 2 GS160/320 System Overview

2.1 System Characteristics ......................................................................... 2-2

2.2 System Box Architecture....................................................................... 2-4

2.3 Quad Building Block (QBB) Components .............................................2-6

2.3.1 Backplane.............................................................................................. 2-8

2.3.2 CPU Module........................................................................................ 2-10

2.3.3 Memory Module .................................................................................. 2-11

2.3.4 Directory Module................................................................................. 2-12

2.3.5 Power Modules.................................................................................... 2-13

2.3.6 Power System Manager Module.......................................................... 2-14

2.3.7 Clock Splitter Module ......................................................................... 2-15

2.3.8 I/O Riser Module ................................................................................. 2-16

2.3.9 Global Port Module ............................................................................. 2-17

2.3.10 Distribution Board........................................................................ 2-18

2.3.11 Hierarchical Switch ...................................................................... 2-20

2.4 Power System...................................................................................... 2-22

2.4.1 AC Input Box....................................................................................... 2-24

2.5 PCI I/O ................................................................................................ 2-26

2.6 Control Panel ...................................................................................... 2-28

2.6.1 Control Panel LEDs ............................................................................ 2-30

Chapter 3 GS160/320 System Configuration Rules

3.1 GS160 System Cabinet.......................................................................... 3-2

3.2 GS320 System Cabinets........................................................................ 3-4

3.3 Power Cabinet....................................................................................... 3-6

3.3.1 Power Supply Slot Assignments ........................................................... 3-8

3.4 System Box.......................................................................................... 3-10

3.5 QBB Color Code .................................................................................. 3-12

3.6 Memory Configurations ...................................................................... 3-14

3.7 Memory Interleaving Guidelines ........................................................ 3-16

3.8 PCI Boxes............................................................................................ 3-18

3.9 PCI Box Slot Configuration................................................................. 3-20

3.10 Expander Cabinet ............................................................................... 3-22

Chapter 4 GS80 Rack System Overview

4.1 Rack System Characteristics ................................................................ 4-2

4.2 System Drawer Architecture................................................................. 4-4

4.3 System Drawer Modules....................................................................... 4-6

Chapter 5 GS80 Rack System Configuration Rules

5.1 Rack....................................................................................................... 5-2

5.2 Rack Power System............................................................................... 5-4

Chapter 6 Booting and Installing an Operating System

6.1 Powering Up the System....................................................................... 6-2

6.1.1 SCM Power-Up Display ........................................................................ 6-4

6.1.2 SRM Power-Up Display ........................................................................ 6-6

6.2 Setting Boot Options........................................................................... 6-10

6.2.1 Bootdef_dev......................................................................................... 6-10

6.2.2 Boot_file .............................................................................................. 6-11

6.2.3 Boot_osflags......................................................................................... 6-12

6.2.4 ei*0_inet_init or ew*0_inet_init.......................................................... 6-14

6.2.5 ei*0_protocols or ew*0_protocols......................................................... 6-15

6.3 Booting Tru64 UNIX........................................................................... 6-16

6.3.1 Booting Tru64 UNIX Over the Network............................................. 6-18

6.4 Installing Tru64 UNIX........................................................................ 6-20

6.5 Booting OpenVMS............................................................................... 6-22

6.5.1 Booting OpenVMS from the InfoServer.............................................. 6-24

6.6 Installing OpenVMS ........................................................................... 6-26

Chapter 7 Operation

7.1 SRM Console ......................................................................................... 7-2

7.1.1 SRM Command Overview..................................................................... 7-4

7.1.2 Setting the Control Panel Message....................................................... 7-6

7.2 Displaying the System Configuration................................................... 7-7

7.2.1 Show Boot Command............................................................................ 7-7

7.2.2 Show Config Command......................................................................... 7-8

7.2.3 Show Device Command....................................................................... 7-16

7.2.4 Show Memory Command .................................................................... 7-18

7.3 Setting SRM Environment Variables ................................................. 7-19

7.4 Setting SRM Console Security ............................................................ 7-20

7.4.1 Setting Tru64 UNIX or OpenVMS Systems to Auto Start ................. 7-21

7.5 Changing the Default Boot Device...................................................... 7-21

7.6 Soft Partitioning.................................................................................. 7-22

7.7 Hard Partitioning................................................................................ 7-26

Chapter 8 Using the System Control Manager

8.1 Console Serial Bus Subsystem.............................................................. 8-2

8.2 System Control Manager Overview...................................................... 8-4

8.3 SCM COM1 Operating Modes............................................................... 8-6

8.3.1 Bypass Modes........................................................................................ 8-8

8.4 Console Device Setup.......................................................................... 8-10

8.5 Entering the SCM ............................................................................... 8-12

8.6 SRM Environment Variables for COM1............................................. 8-13

8.7 SCM Command-Line Interface ........................................................... 8-14

8.7.1 Defining the COM1 Data Flow ........................................................... 8-17

8.7.2 Displaying the System Status............................................................. 8-18

8.7.3 Displaying the System Environment.................................................. 8-20

8.7.4 Power On and Off, Reset, and Halt..................................................... 8-22

8.7.5 Configuring Remote Dial-In................................................................ 8-24

8.7.6 Configuring Alert Dial-Out................................................................. 8-26

8.7.7 Resetting the Escape Sequence........................................................... 8-29

8.8 Troubleshooting Tips........................................................................... 8-30

Appendix A Jumpering Information

A.1 PCI Backplane Jumpers........................................................................A-1

A.2 HPM Jumpers.......................................................................................A-2

A.3 Standard I/O Module Jumpers..............................................................A-2

vii

Glossary

Index

Examples

6–1 SCM Power-Up Display ........................................................................ 6-2

6–2 SRM Power-Up Display ........................................................................ 6-6

6–3 Booting Tru64 UNIX from a Local SCSI Disk .................................... 6-16

6–4 RIS Boot .............................................................................................. 6-18

6–5 Tru64 UNIX Installation Display ....................................................... 6-20

6–6 Booting OpenVMS from a Local Disk ................................................. 6-22

6–7 InfoServer Boot................................................................................... 6-24

6–8 OpenVMS Installation Menu.............................................................. 6-26

7–1 Set Ocp_Text Command...................................................................... 7-6

7–2 Show Boot*............................................................................................ 7-7

7–3 Show Config .......................................................................................... 7-8

7–4 Show Device ........................................................................................ 7-16

7–5 Show Memory...................................................................................... 7-18

7–6 Defining Soft Partitions ...................................................................... 7-24

7–7 Defining Hard Partitions .................................................................... 7-26

8–1 Dial-In Configuration.......................................................................... 8-24

8–2 Alert Dial-Out Configuration.............................................................. 8-26

Figures

1–1 AlphaServer GS160 and GS80 Systems................................................ 1-2

1–2 Sample System Architecture................................................................. 1-5

2–1 System Box............................................................................................ 2-2

2–2 System Box Block Diagram (16-Processor System) .............................. 2-4

2–3 System Box Block Diagram (8-Processor System)................................ 2-5

2–4 System Box QBBs (Top View)............................................................... 2-6

2–5 Backplane (System Box, Front View)....................................................2-8

2–6 CPU Module........................................................................................ 2-10

2–7 Memory Module .................................................................................. 2-11

2–8 Directory Module................................................................................. 2-12

2–9 Power Modules.................................................................................... 2-13

2–10 Power System Manager Module.......................................................... 2-14

2–11 Clock Splitter Module ......................................................................... 2-15

2–12 I/O Riser Module ................................................................................. 2-16

viii

2–13 Global Port Module ............................................................................. 2-17

2–14 Distribution Board .............................................................................. 2-18

2–15 Distribution Board in Single-Box System ........................................... 2-19

2–16 Hierarchical Switch............................................................................. 2-20

2–17 Power System...................................................................................... 2-22

2–18 AC Input Box....................................................................................... 2-24

2–19 PCI Master Box ................................................................................... 2-26

2–20 Control Panel ...................................................................................... 2-28

2–21 Control Panel LED Status .................................................................. 2-30

3–1 GS160 System....................................................................................... 3-2

3–2 GS320 System....................................................................................... 3-4

3–3 Power Cabinet Configuration (32-P System)........................................ 3-6

3–4 Power Supply Slot Assignments ........................................................... 3-8

3–5 System Box QBB (Cabinet Front)....................................................... 3-10

3–6 System Box QBB (Cabinet Rear) ........................................................ 3-11

3–7 QBB Center Bar Color Code (Cabinet Front)...................................... 3-12

3–8 QBB Center Bar Color Code (Cabinet Rear)....................................... 3-13

3–9 Memory Module and Directory Module .............................................. 3-14

3–10 Sample I/O Subsystem ........................................................................ 3-18

3–11 PCI Slot Locations............................................................................... 3-20

3–12 BA356 Storage Device Configurations................................................ 3-22

4–1 System Drawer...................................................................................... 4-2

4–2 Two-Drawer Block Diagram.................................................................. 4-4

4–3 System Drawer Modules....................................................................... 4-6

4–4 System Drawer Backplane.................................................................... 4-7

5–1 Rack....................................................................................................... 5-2

5–2 Rack Optional Configurations............................................................... 5-3

5–3 Two-Drawer Rack Power System.......................................................... 5-4

8–1 CSB Block Diagram .............................................................................. 8-2

8–2 Data Flow in Through Mode .................................................................8-6

8–3 Data Flow in Bypass Mode.................................................................... 8-8

8–4 Setups for SCM (PCI Box).................................................................. 8-11

Tables

1 AlphaServer 80/160/320 Family Documentation .................................. xiv

2–1 System Box Characteristics .................................................................. 2-2

2–2 Power Cabinet and System Environmental Characteristics ................2-3

2–3 AC Input Box Circuit Breakers........................................................... 2-25

3–1 Interleaving Memory Modules............................................................ 3-16

3–2 PCI Slots and Logical Hoses ............................................................... 3-21

4–1 System Drawer Characteristics ............................................................ 4-2

4–2 Rack System Characteristics ................................................................ 4-3

6–1 OpenVMS Boot Flag Settings ............................................................. 6-13

7–1 Summary of SRM Commands............................................................... 7-2

7–2 Notation Formats for SRM Console Commands................................... 7-4

7–3 Special Characters for SRM Console ................................................... 7-5

7–4 Device Naming Conventions............................................................... 7-17

7–5 SRM Environment Variables for Soft Partitions ................................ 7-23

7–6 SCM Environment Variables for Hard Partitions .............................. 7-26

8–1 SCM Commands.................................................................................. 8-14

8–2 Status Command Fields...................................................................... 8-18

8–3 Elements of Dial String and Alert String ........................................... 8-28

8–4 SCM Troubleshooting.......................................................................... 8-30

A–1 PCI Backplane Jumpers........................................................................A-1

A–2 HPM Jumpers.......................................................................................A-2

A–3 Standard I/O Module Jumpers..............................................................A-2

Preface

Intended Audience

This manual is for managers and operators of Compaq AlphaServer 80/160/320 family systems.

Document Structure

This manual uses a structured documentation design. Topics are organized into small sections, usually consisting of two facing pages. Most topics begin with an abstract that provides an overview of the section, followed by an illustration or example. The facing page contains descriptions, procedures, and syntax definitions.

This manual has eight chapters, an appendix, and glossary.

• Chapter 1, Introduction, gives a general overview of the AlphaServer 80/160/320 family.

• Chapter 2, GS160/320 System Overview, describes the components of the GS160 and GS320 systems.

• Chapter 3, GS160/320 System Configuration Rules,provides configuration guidelines for the GS160 and GS320 systems.

• Chapter 4, GS80 Rack System Overview, describes the components of the GS80 rack system.

• Chapter 5, GS80 Rack System Configuration Rules,provides configuration guidelines for the GS80 system.

• Chapter 6, Booting and Installing an Operating System, tells how to boot a supported operating system and how to set boot options.

• Chapter 7, Operation, gives basic operating instructions.

• Chapter 8, Using the System Control Manager, describes the function

and operation of the system control manager.

• Appendix A, Jumpering Information, calls out jumpers and their functions.

Documentation Titles

Table 1 AlphaServer 80/160/320 Family Documentation

Order Number Title

QA–6GAAA–G8 AlphaServer GS80/160/320 Documentation Kit

EK–GS320–UG AlphaServer GS80/160/320 User’s Guide

EK–GS320–RM AlphaServer GS80/160/320 Firmware Reference Manual

EK–GSPAR–RM AlphaServer GS80/160/320 Getting Started with Partitions

EK–GS320–IN AlphaServer GS160/320 Installation Guide

EK–GSR80–IN AlphaServer GS80 Installation Guide

AG–RKSWB–BE AlphaServer GS80/160/320 User Information CD (HTML files)

AG–RLVJA–BE AlphaServer GS80/160/320 User Information CD (translations)

QA–6GAAB–G8 AlphaServer GS80/160/320 Service Documentation Kit

EK–GS320–SV AlphaServer GS80/160/320 Service Manual

EK–GS320–RM AlphaServer GS80/160/320 Firmware Reference Manual

AG–RKSZ*–BE AlphaServer GS80/160/320 Service Information CD

EK–GSCON–IN AlphaServer GS80/160/320 System Management Console

Installation and User’s Guide

EK–GS320–UP AlphaServer GS160/320 Upgrade Manual

EK–GSR80–UP AlphaServer GS80 Upgrade Manual

EK–GS320–SP AlphaServer GS80/160/320 Site Preparation

Information on the Internet

Visit the Compaq Web site at www.compaq.com/alphaserver/ site_index.html for service tools and more information about the AlphaServer GS80/160/320 family systems.

xii

Chapter 1

Introduction

The Compaq AlphaServer GS160/320 and GS80 systems are high-performance server platforms designed for enterprise-level applications. They offer a high degree of scalability and expandability.

The GS160/320 system uses up to four Alpha microprocessors in each quad building block (QBB). Two QBBs are paired back-to-back and rotated 180 degrees with reference to each other and then enclosed in a system box. A system cabinet can hold up to two system boxes.

The GS80 rack system uses up to four Alpha microprocessors in a drawer. Each rack holds up to two system drawers.

This chapter introduces the AlphaServer GS160/320 and AlphaServer GS80 systems. There are three sections:

• AlphaServer GS160/320 and GS80 Systems

• Firmware and Utilities Overview

• System Architecture

NOTE: When you unpack your system, be sure to save and store all shipping

brackets, pallets, and packing material. You will need this material to repack the system, if you should decide to relocate it.

Introduction 1-1

1.1 AlphaServer GS160/320 and GS80 Systems

The AlphaServer GS160/320 system and GS80 rack system are separate, but related, in that they use the same switch technology. The CPU modules, memory modules, and power modules are also the same. In the GS160/320 system, the modules are in a system box in a cabinet. In theGS80racksystem,themodulesareinadrawer.

Figure 1–1 AlphaServer GS160 and GS80 Systems

GS80 System

GS160 System

1-2 AlphaServer GS80/160/320 User's Guide

PK-0654-00

AlphaServer GS160/320 System

The AlphaServer GS160 system cabinet contains up to two system boxes supporting a maximum of 16 CPU modules.

In an AlphaServer GS320 system, a second system cabinet is used to expand the system (up to four system boxes containing a maximum of 32 CPU modules).

A power cabinet contains the power components, I/O boxes, and storage. Additional I/O and storage can be housed in expander cabinets.

AlphaServer GS80 System

The AlphaServer GS80 rack system contains up to two system drawers, I/O, and storage. Each system drawer supports up to four CPU modules, for a maximum of eight CPUs per system. Power components are mounted at the bottom of the rack cabinet.

An expander cabinet can be used to house additional I/O and storage.

System Management Console

The console device, called the system management console (SMC), is a Compaq Deskpro PC, a DECserver 90M terminal server, and associated hardware and

software. For installation instructions and user information, see the

AlphaServer GS80/160/320 System Management Console Installation and User’s Guide.

Introduction 1-3

1.2 Firmware and Utilities Overview

Firmware residing in ROM on CPU and other modules in the system provides commands for booting the operating system, testing devices and I/O adapters, and other tasks useful in operating and maintaining a running system. You type commands at the console device.

SRM Console

Systems running the Tru64 UNIX or OpenVMS operating systems are configured from the SRM console, a command-line interface (CLI). From the CLI you can enter commands to configure the system, view the system configuration, and boot the system.

System Control Manager (SCM)

The SCM firmware allows the user to access the system remotely. In addition, the SCM:

• Monitors and notifies the user of power or temperature alert conditions

• Controls initial system power-up

• Manages hard partitions

LFU (Loadable Firmware Update Utility)

You can boot this utility (with the SRM boot command) whenever you need to update the SRM console firmware or I/O device firmware. The CD with the AlphaServer firmware is updated periodically.

1-4 AlphaServer GS80/160/320 User's Guide

1.3 System Architecture

Each QBB in a GS160/320 system and each QBB (system drawer) in a GS80 system has a backplane and a switch supporting the CPU modules, memory modules, and I/O riser modules. Figure 1–2 shows twoQBBsinasingle-boxsystem.

Figure 1–2 Sample System Architecture

System Box

To PCI Boxes

CPU

I/O GP

MEM

CPU

I/O GP

MEM

CPU CPU CPU

Switch

MEMMEMMEM

Distribution

Board

CPU CPU CPU

Switch

MEMMEMMEM

PK-0601A-98

The backplane of each QBB (GS160/320 systems) and drawer (GS80 rack systems) contains the switch that interconnects the CPU modules, memory modules, and I/O riser modules.

The global port and distribution board provide the interconnect for the QBBs. In a two-box system, a hierarchical switch is used as the interconnect, in place of the distribution board.

I/O riser modules connect the PCI boxes to the QBB backplane.

Introduction 1-5

Chapter 2

GS160/320 System Overview

Each system cabinet contains one or two system boxes. The system box houses two quad building blocks, or QBBs. CPU modules, memory modules, power modules, and I/O riser modules plug into the QBB backplane.

The power cabinet contains power components, PCI boxes, and storage shelves.

This chapter provides an overview of the system in these sections:

• System Characteristics

• System Box Architecture

• Quad Building Block (QBB) Components

• Power System

• PCI I/O

• Control Panel

GS160/320 System Overview 2-1

2.1 System Characteristics

The illustration shows the BA51A-AA system box. Table 2–1 lists the system box characteristics. Table 2–2 lists power cabinet and environmental characteristics.

Figure 2–1 System Box

PK0611

Table 2–1 System Box Characteristics

Characteristic Specification

Size

Weight 54.55 kg (120 lb) maximum

Maximum heat dissipation 2000 w (6,850 Btu/hr)

2-2 AlphaServer GS80/160/320 User's Guide

535 mm H x 550 mm W x 475 mm D (21.06 in. x 21.65 in. x 18.7 in.)

Table 2–2 Power Cabinet and System Environmental Characteristics

Power Cabinet Specifications

Electrical

Voltage

120/208 VAC (U.S) 380–415 VAC (Europe) 200 VAC (Japan)

Phase 3-phase

Frequency 50–60 Hz

Maximum input

21 A

current/phase

Heat dissipation

9,300 W/31,800 Btu/Hr

Environmental

Temperature

Operating: 5° to 35°C (41 to 95°F) Not operating: -40° to 66°C (-40° to 151°F)

Humidity

Operating: 10% to 90% Not operating: 10% to 95%

Altitude

Operating: 0 to 3 km (0 to 10,000 ft) Not operating: 0 to 12.2 km (0 to 40,000 ft)

A fully configured system with three system boxes, nine power supplies, two

PCI boxes, and storage shelf.

GS160/320 System Overview 2-3

2.2 System Box Architecture

The system box houses two quad building blocks (QBBs). Each QBB has a backplane with a switch interconnect that supports up to four CPU modules, four memory modules, two power modules, two I/O riser modules, and a global port. Figure 2–2 shows two system boxes connected by the hierarchical switch. Figure 2–3 shows one system box and the distribution board.

Figure 2–2 System Box Block Diagram (16-Processor System)

System Box 1

Modem

Operator

Console

PCI Box

Standard

I/O SCM

PCI Box

CPU

CPU CPU CPU

I/O GP

Switch

MEM

CPU

CPU CPU CPU

I/O GP

Switch

MEM

MEMMEMMEM

System Box 2

Hierarchical

Switch

CPU

PCI Box

CPU CPU CPU

I/O GP

Switch

MEM

CPU

CPU CPU CPU

I/O GP

Switch

MEM

MEMMEMMEM

2-4 AlphaServer GS80/160/320 User's Guide

PK-0623-98

The switch on the backplane connects the CPU modules, memory modules, I/O riser modules, and global port. In an 8-P system, the global ports connect the QBBs to the distribution board. In a 16-P or a 32-P system, the global ports connect the QBBs to the hierarchical switch.

Figure 2–3 System Box Block Diagram (8-Processor System)

Operator

Console

Modem

PCI Box

Standard

I/O SCM

PCI Box

System Box

CPU

I/O GP

MEM

CPU

I/O GP

MEM

CPU CPU CPU

Switch

MEMMEMMEM

CPU CPU CPU

Switch

MEMMEMMEM

Distribution

Board

PK-0601-98

GS160/320 System Overview 2-5

2.3 Quad Building Block (QBB) Components

Figure2–4showstwoQBBsbacktobackinthesystembox.

Figure 2–4 System Box QBBs (Top View)

QBB 1 (Front)

Top View

QBB 0 (Rear)

2-6 AlphaServer GS80/160/320 User's Guide

PK-0612-98

The QBB backplanes are attached to a stiffener and mounted in a system box enclosure. Each backplane has a differently positioned cutout to accommodate the global port modules. A global port module is mounted on the front of one QBB and the other is mounted on the back of the other QBB, putting both global port modules near the distribution board (or the hierarchical switch) when the system box is installed in the cabinet.

The callouts in Figure 2–4 point to the location of these components in the system box:

I/O riser module area. Each QBB supports up to two I/O riser

➊

modules.

CPU module and memory module area. Each QBB holds four CPUs

➋

and four memory modules.

Global port area.

➌

Backplane area.

➍

GS160/320 System Overview 2-7

2.3.1 Backplane

Each QBB backplane is located at the center of the system box. Figure 2–5 shows an unpopulated backplane (no modules installed) as you would see it from the front of the system box.

Figure 2–5 Backplane (System Box, Front View)

1 2 3 4 3 4 5

6 4 3 4 3 7 8 9

2-8 AlphaServer GS80/160/320 User's Guide

PK0600

The CPU, memory, power, and I/O riser modules plug into the backplane. Because of the orientation of the QBB backplanes, the modules are situated differently in the front and rear of the system box. See Section 3.5 for more information.

The switch interconnect on the backplane allows any processor to access any memory on the QBB. The backplane also provides power to the modules.

Global port module

➊

Directory module

➋

CPU module

➌

Memory module

➍

I/O riser modules

➎

Clock splitter module

➏

Power system manager (PSM) module

➐

Main power module

➑

Auxiliary power module

➒

GS160/320 System Overview 2-9

2.3.2 CPU Module

A CPU module comes with an Alpha microprocessor chip with a Bcache, cache control and TAG comparison logic, clock logic, and a DCDC power converter. Also included on the module is logic for implementing self-test diagnostics. Each module has a Run LED and a Hot Swap LED.

Figure 2–6 CPU Module

Run LED

Hot Swap LED

Power Converter

CPU Chip

PK0602

2-10 AlphaServer GS80/160/320 User's Guide

2.3.3 Memory Module

A memory module has eight DIMM slots. See Section 3.7 for memory configuration guidelines.

Figure 2–7 Memory Module

DIMMs

PK0603

GS160/320 System Overview 2-11

2.3.4 Directory Module

In a GS160/320 system, one directory module is required for each QBB in a system box. In a two-drawer GS80 system, a directory module is required in each system drawer. No directory module is needed in a one-drawer system. The directory module functions as a memory coherency manager.

Figure 2–8 Directory Module

Directory DIMMs

2-12 AlphaServer GS80/160/320 User's Guide

PK0606

+ 154 hidden pages

Compaq GS320, GS80, GS160 User Manual

Contents

Preface