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USER’S

GUIDE

MegaRAID® 8480

Storage Adapter

J u l y 2 0 0 7

®

IBM P/N: 42D8846

This document contains copyrighted information of LSI Corporation.

LSI products are not intended for use in life-support appliances, devices, or systems.

Purchase of I2C components of LSI Corporation, or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C standard Specification as defined by Philips.

IBM P/N: 42D8846, July 2007. This document describes the current version of the LSI Corporation MegaRAID 8480 Storage Adapter and will remain the official reference source for all revisions/releases of this product until rescinded by an update.

LSI Corporation reserves the right to make changes to any products herein at any time without notice. LSI does not assume any responsibility or liability arising out of the application or use of any product described herein, except as expressly agreed to in writing by LSI.

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

TRADEMARK ACKNOWLEDGMENT

LSI, the LSI logo design, Fusion-MPT, and MegaRAID are trademarks or registered trademarks of LSI Corporation. Microsoft and Windows are registered trademarks of Microsoft Corporation. SUSE is a trademark and NetWare is a registered trademark of Novell, Inc. Red Hat is a registered trademark of Red Hat, Inc. UnixWare is a registered trademark of The Open Group. OpenServer is a trademark of Caldera International, Inc. Linux is a registered trademark of Linus Torvalds. All other brand and product names may be trademarks of their respective companies.

To receive product literature, visit http://www.ibm.com/support/ and click on Product publications.

ii

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Preface

This book is the primary reference and user’s guide for the LSI MegaRAID® 8480 RAID Storage Adapter. It contains installation instructions and specifications for the adapter.

For details on how to configure the storage adapter, refer to the

MegaRAID 8480 Software User’s Guide. For information about the operating system drivers, refer to the MegaRAID 8480 Device Driver Installation User’s Guide.

Audience

This document assumes that you have some familiarity with RAID controllers and related support devices. The people who benefit from this book are:

Engineers who are designing a system that will include a MegaRAID 8480 SAS Storage Adapter

Anyone installing a MegaRAID 8480 Storage Adapter in a RAID system

Organization

This document has the following chapters and appendix:

Chapter 1, Overview, provides a general overview of the MegaRAID 8480 Storage Adapter.

Chapter 2, MegaRAID 8480 Hardware Installation, describes the procedures for installing the MegaRAID 8480 Storage Adapter.

Chapter 3, MegaRAID 8480 Storage Adapter Characteristics, provides the characteristics and technical specifications for the MegaRAID 8480 Storage Adapter.

MegaRAID 8480 Storage Adapter User’s Guide

iii

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Appendix A, Glossary of Terms and Abbreviations, lists and explains the terms and abbreviations used in this manual.

Related Publications

MegaRAID Battery Backup Unit User’s Guide

IBM Document Number: 42D8847

This document explains how to install and use the LSI battery backup unit for MegaRAID 8480 Storage Adapter. The 8480 board uses the LSI intelligent Transportable Battery Backup Unit 02 (LSIiTBBU02).

MegaRAID 8480 Device Driver Installation User’s Guide

IBM Document Number: 42D8845

This document explains how to install the MegaRAID device driver for your operating system. The information in this document is independent of the back-end bus and applies to the Megaraid 8480 Storage Adapter.

MegaRAID 8480 Software User’s Guide

IBM Document Number: 42D8848

This document explains how to use the MegaRAID Storage Manager, WebBIOS, and Command Line Interface (CLI) utilities to configure, monitor, and maintain MegaRAID 8480 Storage Adapter and the storage-related devices connected to them.

iv

Preface

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

 

Conventions

Throughout the manual, the conventions described in the following table are used to describe user interaction with the product:

Notation

 

Example

 

Meaning and Use

 

 

 

 

 

courier typeface

 

.nwk file

 

Names of commands, files, and directories as well as

 

 

 

 

code and screen messages are shown in courier.

 

 

 

 

 

bold typeface

 

fd1sp

 

In a command line, keywords are shown in bold, non-italic

 

 

 

 

typeface. Enter them exactly as shown.

 

 

 

 

 

italics

 

module

 

In command lines and names italics indicate user vari-

 

 

 

 

ables. Italicized text must be replaced with appropriate

 

 

 

 

user-specified items. Enter items of the type called for,

 

 

 

 

using lowercase.

 

 

 

 

 

Initial Capital letters

 

Undo

 

Names of menu commands, options, check buttons, text

 

 

Edit

 

buttons, options buttons, text boxes, list boxes, and so on.,

 

 

Apply

 

are shown in text with Initial Capital lettering to avoid mis-

 

 

 

 

reading. These elements may appear on your screen in all

 

 

 

 

lowercase.

 

 

 

 

 

semicolon, and other

 

 

 

Use as shown in the text.

punctuation

 

 

 

 

 

 

 

 

 

 

Note: Notes contain supplementary information that can affect

 

 

 

system performance.

 

Attention:

Attention notices identify actions that might adversely affect

 

 

 

equipment operation, system performance, or data integrity.

Revision History

IBM Document

 

 

Number

Date/Version

Remarks

 

 

 

42D8846

Version 1.2

Revised Table 1.1 about the number of physical drives

 

July 2007

allowed for each RAID level.

 

 

 

42D8846

Version 1.1

Made edits and added information about controller limita-

 

April 2007

tions, and the number of physical drives supported at each

 

 

RAID level.

 

 

 

42D8846

Version 1.0

Initial release of document.

 

June 2006

 

 

 

 

Preface

v

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

IBM Customer Support

If you have feedback or questions, you can contact IBM.

E-mail:

askibm@vnet.ibm.com

Phone:

(Toll free) 1-800-IBM-4YOU (1-800-426-4968)

Web site:

https://www.ibm.com/support/us/fbmast.html

Safety Instructions

Use the following safety guidelines to help protect your computer system from potential damage and to ensure your own personal safety.

Note: Use the MegaRAID 8480 Storage Adapter with UL-listed

Information Technology Equipment (ITE) products only.

When Using Your Computer System – As you use your computer system, observe the following safety guidelines:

Do not operate your computer system with any cover(s) (such as computer covers, bezels, filler brackets, and front-panel inserts) removed.

To help avoid damaging your computer, be sure the voltage selection switch on the power supply is set to match the alternating current (AC) power available at your location:

115 volts (V)/60 hertz (Hz) in most of North and South America and some Far Eastern countries such as Japan, South Korea, and Taiwan.

230 V/50 Hz in most of Europe, the Middle East, and the Far East. Also be sure your monitor and attached peripherals are electrically rated to operate with the AC power available in your location.

vi

Preface

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

 

To help avoid possible damage to the system board, wait 5 seconds after you turn off the system before you remove a component from the system board or disconnect a peripheral device from the computer.

To help prevent electric shock, plug the computer and peripheral power cables into properly grounded power sources. These cables are equipped with 3-prong plugs to ensure proper grounding.

Do not use adapter plugs or remove the grounding prong from a cable. If you must use an extension cable, use a 3-wire cable with properly grounded plugs.

To help protect your computer system from sudden, transient increases and decreases in electrical power, use a surge suppressor, line conditioner, or uninterruptible power supply (UPS).

Be sure nothing rests on your computer system cables and that the cables are not located where they can be stepped on or tripped over.

Do not spill food or liquids on your computer. If the computer gets wet, consult the documentation that came with it.

Do not push any objects into the openings of your computer. Doing so can cause fire or electric shock by shorting out interior components.

Keep your computer away from radiators and heat sources. Also, do not block cooling vents. Avoid placing loose papers underneath your computer; do not place your computer in a closed-in wall unit or on a rug.

When Working Inside Your Computer –

Attention: Always follow the installation and service instructions provided with your computer closely.

1.Review all of the safety information provided with your computer.

2.Turn off your computer and any peripherals.

3.Disconnect your computer and peripherals from their power sources. Also disconnect any telephone or telecommunications lines from the computer.

Doing so reduces the potential for personal injury or shock.

Also note these safety guidelines:

Preface

vii

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

When you disconnect a cable, pull on its connector or on its strain-relief loop, not on the cable itself. Some cables have a connector with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a cable, make sure both connectors are correctly oriented and aligned.

Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal mounting bracket. Hold a component such as a microprocessor chip by its edges, not by its pins.

Protecting against Electrostatic Discharge – Static electricity can harm delicate components inside your computer. To prevent static damage, discharge static electricity from your body before you touch any of your computer’s electronic components, such as the microprocessor. You can do so by touching an unpainted metal surface, such as the metal around the card-slot openings at the back of the computer.

As you continue to work inside the computer, periodically touch an unpainted metal surface to remove any static charge your body may have accumulated. In addition to the preceding precautions, you can also take the following steps to prevent damage from electrostatic discharge:

When unpacking a static-sensitive component from its shipping carton, do not remove the component from the antistatic packing material until you are ready to install the component in your computer. Just before unwrapping the antistatic packaging, be sure to discharge static electricity from your body.

When transporting a sensitive component, first place it in an antistatic container or packaging.

Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench pads.

viii

Preface

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

 

Contents

Chapter 1

Overview

1.1

Overview

 

1-1

1.2

MegaRAID 8480 RAID Controller Description

1-3

 

1.2.1

Controller Limitations

1-3

1.3

General Description

1-3

1.4

Configuration Scenario

1-4

 

1.4.1

Number of Physical Disks Supported

1-6

1.5

Benefits of the SAS Interface

1-7

 

1.5.1

PCI Express Architecture

1-8

 

1.5.2

Operating System Support

1-8

1.6Summary of MegaRAID 8480 RAID Controller Characteristics 1-8

 

1.6.1

SAS Features

1-9

 

1.6.2

SATA II Features

1-9

 

1.6.3

PCI Express Performance

1-10

 

1.6.4

Usability Features

1-10

 

1.6.5

Flexibility Features

1-11

 

1.6.6

Drive Roaming

1-11

 

1.6.7

Drive Migration

1-12

1.7

Hardware Specifications

1-13

1.8

Technical Support

1-14

 

 

 

 

Chapter 2

 

 

 

MegaRAID 8480 Hardware Installation

 

2.1

Requirements

2-1

2.2

Quick Installation

2-2

2.3

Detailed Installation

2-2

2.4

SAS Device Cables

2-6

2.4.1Connecting the MegaRAID 8480 RAID Controller to

MegaRAID 8480 Storage Adapter User’s Guide

ix

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Drive Boxes and Drive Expanders

2-8

2.5Replacing a Failed Controller Containing Data in the LSIiTBBU02 2-9

2.6

After Installing the Storage Adapter

2-10

 

 

 

 

Chapter 3

 

 

 

MegaRAID 8480 Storage Adapter Characteristics

 

3.1

MegaRAID 8480 RAID Controller

3-1

 

3.1.1

MegaRAID 8480 RAID Controller

3-2

3.2

MegaRAID 8480 Storage Adapter Characteristics

3-4

3.3

Technical Specifications

3-4

 

3.3.1

Storage Adapter Specifications

3-5

 

3.3.2

Array Performance Features

3-6

 

3.3.3

Fault Tolerance

3-6

 

3.3.4

Electrical Characteristics

3-7

 

3.3.5

Operating and Non-operating Conditions

3-7

 

3.3.6

Safety Characteristics

3-7

Appendix A

Glossary of Terms

and Abbreviations

x

Contents

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Figures

1.1

Example of LSI SAS Direct-Connect Application

1-5

1.2Example of RAID Controller Configured with LSISASx12 Expand-

er

1-6

2.1Example of MegaRAID Board Installation in a PCI Express Slot 2-4

2.2Internal SAS Cable for Connection to SAS and/or SATA II Physi-

 

cal Disks

2-6

2.3

SATA II Connectors

2-7

2.4SAS and SATA II Plugs and SAS Backplane Receptacle Connec-

tor

2-8

2.5Connecting the MegaRAID 8480 RAID Controller with External

 

Connectors to a Drive Box or Drive Enclosure

2-9

3.1

Card Layout for the MegaRAID 8480 RAID Controller

3-2

Contents

xi

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

xii

Contents

 

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

 

 

 

Tables

1.1

Physical Drives Required for Each RAID Level

1-6

1.2MegaRAID 8480 Storage Adapter

 

Specifications

1-14

3.1

MegaRAID 8480 RAID Controller – Connectors

3-3

3.2

MegaRAID 8480 Characteristics

3-4

3.3

Storage Adapter Specifications

3-5

3.4

Array Performance Features

3-6

3.5

Fault Tolerance Features

3-6

3.6

Maximum Power Requirements

3-7

Contents

xiii

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

xiv

Contents

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Chapter 1

Overview

This section provides a general overview of the Megaraid 8480 Storage Adapter with RAID control capabilities. It consists of the following sections:

Section 1.1, “Overview”

Section 1.2, “MegaRAID 8480 RAID Controller Description”

Section 1.3, “General Description”

Section 1.4, “Configuration Scenario”

Section 1.5, “Benefits of the SAS Interface”

Section 1.6, “Summary of MegaRAID 8480 RAID Controller Characteristics”

Section 1.7, “Hardware Specifications”

Section 1.8, “Technical Support”

1.1Overview

The MegaRAID 8480 Storage Adapter is a high-performance intelligent PCI Express-to-SCSI/Serial ATA II adapter with RAID control capabilities. The MegaRAID 8480 Storage Adapter provides reliability, high performance, and fault-tolerant disk subsystem management. It is an ideal RAID solution for the internal storage of workgroup, departmental, and enterprise systems. The MegaRAID 8480 Storage Adapter offers a cost-effective way to implement RAID in a server.

SAS technology brings a wealth of options and flexibility with the use of SAS devices and Serial ATA (SATA) II devices within the same storage infrastructure. However, SAS and SATA devices bring individual characteristics that make each one a more suitable choice depending on your storage needs. MegaRAID gives you the flexibility to combine these

MegaRAID 8480 Storage Adapter User’s Guide

1-1

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

two similar technologies on the same controller and within the same enclosure.

Note: You cannot mix SAS and SATA drives within the same virtual disk(s).

The MegaRAID 8480 Storage Adapter is based on the LSI first-to-market SAS IC technology and proven MegaRAID technology. As the second-generation PCI Express storage adapter, the MegaRAID 8480 controller addresses the growing demand for increased data throughput and scalability requirements across midrange and enterprise-class server platforms. LSI offers a family of MegaRAID SAS adapters addressing the needs for both internal and external solutions.

The innovative LSI intelligent Transportable Battery Backup Unit 2 (LSIiTBBU02) is pre-installed on the MegaRAID 8480 RAID Controller. The LSIiTBBU02 provides cached data protection, which allows system builders to protect cached data even during the most catastrophic system failures.

Note: You must charge the battery before use. Refer to the

MegaRAID Battery Backup Unit User’s Guide on the

MegaRAID 8480 CD for more information.

The MegaRAID 8480 RAID controller supports the ANSI Serial Attached SCSI standard, version 1.1. In addition, the controller supports the SATA II protocol defined by the Serial ATA specification, version 1.0a.

Supporting both the SAS and SATA II interfaces, the controller is a versatile controller that provides the backbone of both server and highend workstation environments.

Each port on the MegaRAID 8480 RAID controller supports SAS and/or SATA II devices using the following:

SAS Serial SCSI Protocol (SSP), which enables communication with other SAS devices

SATA II, which enables communication with other SATA II devices

Serial Management Protocol (SMP), which communicates topology management information directly with an attached SAS expander device

Serial Tunneling Protocol (STP), which enables communication with a SATA II device through an attached expander

1-2

Overview

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

1.2MegaRAID 8480 RAID Controller Description

The MegaRAID 8480 Storage Adapter is available with eight PHYs. The MegaRAID 8480 has one Intel IOP333 I/O processor that controls eight external SAS/SATA ports through two SAS 4x external connectors.

1.2.1Controller Limitations

The MegaRAID 8480 Storage Adapter has the following limitations:

You can connect only one device per SAS PHY unless you use an expander

You can use a maximum external cable length of six feet (LSI recommends using shorter cables, if possible)

Cables have to meet the SAS specification

Though you can mix SAS drives and SATA drives in the same virtual disk, LSI strongly discourages the practice

See Section 3.3.4, “Electrical Characteristics,” for information about the power requirements, and Section 3.3.5, “Operating and Nonoperating Conditions” for information about the minimum and maximum temperature ranges

1.3General Description

The MegaRAID 8480 Storage Adapter brings 3.0 Gbit/s Serial Attached SCSI and 3.0 Gbit/s Serial ATA II performance to host adapter, workstation, and server designs. The controller supports external storage devices, which allows you to use a system that supports enterprise-class SAS and desktop-class SATA II drives. Each MegaRAID 8480 Storage Adapter can connect to drives directly and can use expanders to connect to additional drives. Simplified cabling between devices is an additional benefit.

The RAID controller integrates eight high-performance SAS/SATA II PHYs and a PCI Express bus master DMA core. Each of the eight PHYs is capable of 3.0 Gbit/s SAS link rates and 3.0 Gbit/s SATA II link rates.

MegaRAID 8480 RAID Controller Description

1-3

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

The RAID controller supports the SAS protocol as described in the Serial Attached SCSI Standard, version 1.1. The controller also supports the Serial ATA II (SATA II) protocol defined by the Serial ATA specification, version 1.0a. SATA II is an extension to SATA 1.0a. In addition, the RAID controller supports the following SATA II features:

3 Gbit/s SATA II

Staggered spin-up

Hot Plug

Activity and fault indicators for each PHY

Port Selector (for dual-port drives)

Each port on the RAID controller supports SAS or SATA II devices using the SSP, SMP, STP, and SATA II. The SSP enables communication with other SAS devices. SATA II enables the RAID controller to communicate with SATA II devices.

1.4Configuration Scenario

The following is the main scenario in which you can use the MegaRAID 8480 RAID Controller:

High-end external SAS or SATA II configurations: Disks can be either SATA II or SAS. External enclosure management through in-band, SCSI-enclosed storage. STP and SMP need to be supported.

Figure 1.1 shows a direct-connect configuration. The Inter-IC (I2C) interface communicates with peripherals. The external memory bus provides a 32-bit memory bus, parity checking, and chip select signals for pipelined synchronous burst static random access memory (PSBRAM), nonvolatile static random access memory (NVSRAM), and Flash ROM.

1-4

Overview

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Figure 1.1 Example of LSI SAS Direct-Connect Application

SAS/SATA II Device

 

 

 

 

32-Bit Memory

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address/Data

 

 

 

 

 

 

 

 

 

 

 

SAS

Flash ROM/

SAS/SATA II Device

 

 

 

 

Bus

 

 

 

 

PSBRAM/

 

PCI Express

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RAID Controller

 

I2C

NVSRAM

 

 

 

 

 

SAS/SATA II Device

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interface

I2C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SAS/SATA II Device

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI Express Interface

Configuration Scenario

1-5

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Figure 1.2 shows an example of a RAID controller configured with an LSISASx12 expander that is connected to SAS devices.

Figure 1.2 Example of RAID Controller Configured with

LSISASx12 Expander

 

PCI Express Interface

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32-bit Memory

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address/Data

 

 

 

 

 

 

 

 

 

 

 

Flash ROM/

 

 

 

 

 

 

 

 

 

 

Bus

 

 

 

 

 

 

 

 

 

 

PSBRAM/

 

SAS RAID Controller

 

 

 

 

 

 

 

 

 

I2C

NVSRAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interface

I2C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LSISASx12

LSISASx12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SAS

 

 

 

 

 

 

 

 

 

 

SAS

 

 

 

 

 

 

 

 

 

 

 

 

SAS

 

 

 

 

 

 

 

 

 

 

SAS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drives

 

 

 

 

 

 

 

 

 

 

Drives

 

 

 

 

 

 

 

 

 

 

 

Drives

 

 

 

 

 

 

 

 

 

 

Drives

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.4.1Number of Physical Disks Supported

Your configuration planning for the 8480 RAID controller depends in part on the number of physical disks that you want to use in a RAID array. The number of drives in an array determines the RAID levels that can be supported. Only one RAID level can be assigned to each virtual disk. Table 1.1 shows the minimum and maximum number of drives required for each RAID level.

Table 1.1

Physical Drives Required for Each RAID Level

 

 

 

 

RAID

Minimum # of

Maximum # of

 

Level

Physical Drives

Physical Drives

 

 

 

 

 

0

1

32

 

 

 

 

 

1-6

Overview

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

 

Table 1.1

Physical Drives Required for Each RAID Level (Cont.)

 

 

 

 

 

 

RAID

Minimum # of

Maximum # of

 

 

Level

Physical Drives

Physical Drives

 

 

 

 

 

 

 

1

2

2

 

 

 

 

 

 

 

5

3

32

 

 

 

 

 

 

 

10

4

16

 

 

 

 

 

 

 

 

 

50

6

32

 

 

 

 

 

 

1.5Benefits of the SAS Interface

SAS is a serial, point-to-point, enterprise-level device interface that leverages the proven SCSI protocol set. SAS is a convergence of the advantages of SATA II, SCSI, and fibre channel, and is the future mainstay of the enterprise and high-end workstation storage markets. SAS offers a higher bandwidth per pin than parallel SCSI, and improves signal and data integrity.

The SAS interface uses the proven SCSI command set to ensure reliable data transfers, while providing the connectivity and flexibility of point-to-point serial data transfers. The serial transmission of SCSI commands eliminates clock skew challenges. The SAS interface provides improved performance, simplified cabling, smaller connectors, lower pin count, and lower power requirements when compared to parallel SCSI.

The RAID controller leverages a common electrical and physical connection interface that is compatible with Serial ATA technology. The SAS and SATA II protocols use a thin, 7-wire connector instead of the 68-wire SCSI cable or 26-wire ATA cable. The SAS/SATA II connector and cable are easier to manipulate, allow connections to smaller devices, and do not inhibit airflow. The point-to-point SATA II architecture eliminates inherent difficulties created by the legacy ATA master-slave architecture, while maintaining compatibility with existing ATA firmware.

Benefits of the SAS Interface

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1.5.1PCI Express Architecture

PCI Express is a local bus system designed to increase data transfers without slowing down the central processing unit (CPU). You can install MegaRAID PCI Express storage adapters in PCI Express computer systems with a standard bracket type. With these adapters in your system, you can connect SCSI and SATA II devices over the bus.

PCI Express goes beyond the PCI specification in that it is intended as a unifying I/O architecture for various systems: desktops, workstations, mobile, server, communications, and embedded devices.

1.5.2Operating System Support

The MegaRAID 8480 Storage Adapter supports the following operating systems:

Windows (2000 and Server 2003)

Red Hat Linux

SUSE Linux

The MegaRAID 8480 Storage Adapter uses Fusion-MPT™ architecture for all major operating systems, thinner drivers, and better performance.

1.6Summary of MegaRAID 8480 RAID Controller Characteristics

This section provides a summary of the features and benefits of the MegaRAID 8480 RAID controller. It contains information on SAS features, SATA II features, PCI performance, integration, usability, and flexibility.

The MegaRAID 8480 Storage Adapter includes the following features:

PCI Express x8 lane width (with support for downshifting for motherboards with x1 and x4 connections)

PCI Express performance up to 2.5 Gbits/s per lane

Support for a 256 Mbyte DDR2 400 MHz on-board SDRAM with LSIiTBBU02 intelligible transportable battery backup

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Two external connectors

Support for RAID levels 0, 1, 5, 10, and 50

Advanced array configuration and management utilities

Online RAID level migration

Drive migration

Drive roaming

Patrol Read

No reboot necessary after expansion

More than 200 Qtags per array

User-specified rebuild rate

32 Kbyte nonvolatile random access memory (NVRAM) for storing RAID system configuration information; the MegaRAID SAS firmware is stored in flash ROM for easy upgrade.

1.6.1SAS Features

The following list describes the SAS features:

Provides eight fully independent PHYs

Supports 3.0 Gbit/s SAS data transfers per PHY

Supports SSP to enable communication with other SAS devices

Supports SMP to communicate topology management information

Provides a serial, point-to-point, enterprise-level storage interface

Simplifies cabling between devices

Provides a scalable interface that supports up to 128 devices through multiple expanders

Supports wide ports consisting of 2, 3, or 4 PHYs within a single quad port

Supports narrow ports consisting of a single PHY

Transfers data using SCSI information units

1.6.2SATA II Features

The following list describes the SATA II features:

Summary of MegaRAID 8480 RAID Controller Characteristics

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Supports SATA II data transfers of 3.0 Gbits/s

Supports STP data transfers of 3.0 Gbits/s

Provides a serial, point-to-point storage interface

Simplifies cabling between devices

Eliminates the master-slave construction used in parallel ATA

Allows addressing of multiple SATA II targets through an expander

Allows multiple initiators to address a single target (in a fail-over configuration) through an expander

1.6.3PCI Express Performance

The following list describes the PCI Express performance features:

Provides a PCI Express interface that:

Supports a dedicated PCI Express bus

Supports x4 or x8 lane configuration

Supports transfer rates of up to 2.5 Gbits/s per lane

Complies with the PCI Express Specification, Revision 1.0a

Provides unequaled performance through the Fusion-MPT architecture

Provides high throughput and low CPU utilization to offload the host processor

Uses an Intel IOP333 I/O processor

1.6.4Usability Features

The following list describes the usability features:

Simplifies cabling with point-to-point, serial architecture

Supports smaller, thinner cables that do not restrict airflow

Provides drive spin-up sequencing control

Provides up to two LED signals for each PHY to indicate link activity and faults

Provides an I2C interface for enclosure management

1-10

Overview

 

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Supports the internal SAS Sideband signal SFF-8485 (SGPIO) interface

1.6.5Flexibility Features

These features increase the flexibility of the MegaRAID 8480 RAID controller:

Supports a Flash ROM interface, a nonvolatile RAM (NVSRAM) interface, and a pipelined synchronous burst SRAM (PSBRAM) interface

Allows connections to SAS or SATA II targets

Leverages compatible connectors for SAS and SATA II connections

Allows grouping of up to four PHYs in a single quad port to form a wide port

1.6.6Drive Roaming

Drive roaming occurs when the hard drives are changed to different ports on the same controller. When the drives are placed on different channels, the controller detects the RAID configuration from the configuration data on the drives.

Configuration data is saved in both the NVRAM on the RAID controller and on the hard drives attached to the controller. This maintains the integrity of the data on each drive, even if the drives have changed their target ID.

Note: If you move a drive that is being rebuilt, the rebuild operation will restart, not resume.

Follow these steps to use drive roaming:

Step 1. Review all safety information provided with the server; then, turn off the server and all attached devices and unplug the server and device power cords.

Step 2. Open the host system, following the instructions in the host system technical documentation.

Step 3. Move the drives to different positions on the backplane to change the targets.

Summary of MegaRAID 8480 RAID Controller Characteristics

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Step 4. Determine the SAS target requirements.

Step 5. Perform a safety check.

a.Make sure the drives are inserted properly.

b.Close the cabinet of the host system.

c.Turn power on after completing the safety check.

Step 6. Power-on the system.

The controller then detects the RAID configuration from the configuration data on the drives.

1.6.7Drive Migration

Drive migration is the transfer of a set of hard drives in an existing configuration from one controller to another. The drives must remain on the same channel and must be reinstalled in the same order as in the original configuration. The controller to which you migrate the drives cannot have an existing configuration.

Note: Only complete configurations can be migrated; individual virtual disks cannot be migrated.

Note: Drive roaming and drive migration cannot be supported at the same time.

Follow these steps to migrate drives:

Step 1. Make sure that you clear the configuration on the system to which you migrate the drives, to prevent a configuration data mismatch between the hard drives and the NVRAM.

Note: When you migrate drives, move only the disks that make up the virtual disk (not all the physical disks in an array), so you do not see an NVRAM mismatch error (providing a configuration is on the destination controller). The NVRAM mismatch error appears only if you move all of the physical drives to the other controller.

Step 2. Review all safety information provided with the server; then, turn off the server and all attached devices and unplug the server and device power cords.

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Overview

 

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Step 3. Open the host systems by following the instructions in the host system technical documentation.

Step 4. Remove the SAS cable connectors from the internal drives or the shielded cables from the external drives you want to migrate.

a.Make sure pin 1 on the cable matches pin 1 on the connector.

b.Make sure that the SAS cables conform to all SAS specifications.

Step 5. Remove the hard drives from the first system and insert them into drive bays on the second system.

Step 6. Connect the SAS cables to the hard drives in the second system.

Step 7. Determine the SAS target requirements.

Step 8. Perform a safety check.

a.Make sure all cables are properly attached.

b.Make sure the RAID controller is properly installed.

c.Close the cabinet of the host system.

d.Turn power on after completing the safety check. Step 9. Power-on the system.

The controller then detects the RAID configuration from the configuration data on the drives.

1.7Hardware Specifications

You can install the MegaRAID 8480 Storage Adapter in a computer with a mainboard that has a PCI Express slot. Table 1.2 describes the hardware configuration features for the MegaRAID 8480 Storage Adapter.

Hardware Specifications

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Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Table 1.2

MegaRAID 8480 Storage Adapter

 

Specifications

 

 

 

Specification

 

Megaraid 8480 Storage Adapter

 

 

 

RAID Levels

 

0, 1, 5, 10, and 50

 

 

Devices Supported

Up to 15 SAS or SATA II devices (such as hard drives

per Port

 

and expanders)

 

 

 

Ports

 

Eight external

 

 

Data Transfer Rate

Up to 3 Gbits/s per phy

 

 

 

Bus

 

PCI Express 1.0a

 

 

Cache Function

Write-back, write-through, adaptive read ahead,

 

 

non-read ahead, read ahead, cache I/O, direct I/O

 

 

Multiple Virtual Disks/

Up to 40 virtual disks per controller or per logical array

Arrays per Controller

 

 

 

Online Capacity

Yes

Expansion

 

 

 

 

Dedicated and Global

Yes

Hot Spares

 

 

 

 

Hot Swap Devices

Yes

Supported

 

 

 

 

Non-Disk Devices

Yes

Supported

 

 

 

 

Mixed Capacity

Yes

Physical Disks

 

Supported

 

 

 

 

Number of External

MegaRAID 8480 – Two (x4 SAS Port) SFF-8470 SAS

Connectors

 

4x connectors

 

 

Hardware Exclusive

Yes

OR (XOR) Assistance

 

 

 

 

Direct I/O

 

Yes

 

 

 

Architecture

 

Fusion-MPT

 

 

 

1.8Technical Support

See the Warranty and Support Information document for information about the technical support available for this product.

1-14

Overview

 

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Chapter 2

MegaRAID 8480

Hardware Installation

This chapter describes the procedures used to install the MegaRAID 8480 Storage Adapter. It consists of the following sections:

Section 2.1, “Requirements”

Section 2.2, “Quick Installation”

Section 2.3, “Detailed Installation”

Section 2.4, “SAS Device Cables”

Section 2.5, “Replacing a Failed Controller Containing Data in the LSIiTBBU02”

Section 2.6, “After Installing the Storage Adapter”

2.1Requirements

The following items are required for installation:

A MegaRAID 8480 RAID Controller

A host system with an available PCI Express expansion slot

The MegaRAID 8480 CD, containing the drivers and documentation

The necessary internal and/or external cables

SAS or SATA II physical disks

Note: LSI strongly recommends using an uninterruptible power supply (UPS).

MegaRAID 8480 Storage Adapter User’s Guide

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Copyright © 2006-2007 by LSI Corporation. All rights reserved.

2.2Quick Installation

The following steps are for quick MegaRAID 8480 Storage Adapter installation. These steps are for experienced computer users/installers. Section 2.3, “Detailed Installation,” contains the steps for all others to follow.

Step 1. Review all safety information provided with the server; then, turn off the server and all attached devices and unplug the server and device power cords.

Step 2. Open the cabinet of the host system by following the instructions in the host system technical documentation.

Step 3. Check the memory module on the adapter.

Step 4. Install the MegaRAID 8480 Storage Adapter in the server and connect SAS or SATA II devices to it. Ensure that the cables you use conform to all specifications.

Step 5. Perform a safety check.

a.Ensure that all cables are properly attached

b.Ensure that the MegaRAID 8480 Storage Adapter is properly installed

c.Close the cabinet of the host system

Step 6. Turn power on after you complete the safety check.

2.3Detailed Installation

This section provides detailed instructions for installing a MegaRAID 8480 Storage Adapter.

Step 1. Unpack the Storage Adapter

Unpack and remove the MegaRAID 8480 Storage Adapter. Inspect it for damage. If it appears damaged, or if any of the following items are missing, contact your place of purchase. The MegaRAID 8480 Storage Adapter is shipped with:

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MegaRAID 8480 Hardware Installation

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

A CD containing MegaRAID drivers for supported operating systems, an electronic version of this User’s Guide, and other related documentation

A license agreement

Warranty information

Step 2. Turn off the Power to the System

Review all safety information provided with the computer; then, turn off the computer, unplug the power cords from the power supplies, disconnect the computer from the network, and remove the computer cover. See the documentation provided with the computer for instructions. Before installing the controller, make sure that the computer is disconnected from the power and from any networks.

Step 3. Review the MegaRAID Controller Connectors

Refer to Chapter 3, “MegaRAID 8480 Storage Adapter Characteristics” for a diagram of the MegaRAID 8480 RAID controller with its connectors.

Step 4. Review the Controller Limitations

Review Section 1.2.1, “Controller Limitations” before you install the controller in the system.

Step 5. Check the Memory Module

Ensure that the memory module is present and seated firmly in the dual-inline memory module (DIMM) socket.

Step 6. Install the MegaRAID 8480 Storage Adapter

Select a PCI Express slot and align the controller’s PCI Express bus connector to the slot. Press down gently but firmly to ensure that the card is properly seated in the slot. Secure the bracket to the computer chassis.

Figure 2.1 shows the installation of a RAID controller in a PCI Express slot.

Attention: To avoid damage to the computer, always remove the 8480 RAID Controller from the PCI Express slot before you relocate or ship the computer.

Detailed Installation

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Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Figure 2.1 Example of MegaRAID Board Installation in a

PCI Express Slot

Bracket

 

Screw

Press

 

Here

Press

Here

PCI Express Slot

Step 7. Configure and Install the SAS and/or the SATA II Devices in the Host Computer Case

Refer to the documentation for the devices for any preinstallation configuration requirements.

Step 8. Connect SAS and/or SATA II Devices to the Storage Adapter

Use SAS cables to connect SAS and/or SATA II devices to the MegaRAID 8480 Storage Adapter. Refer to Section 2.4, “SAS Device Cables” for SAS cable information. Refer to

Section 2.4.1, “Connecting the MegaRAID 8480 RAID Controller to Drive Boxes and Drive Expanders,” on page 2-8 for details on connecting the controller to physical disks and expanders.

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The maximum cable length is six external meters. You can connect one device per SAS PHY unless you use an expander.

System throughput problems can occur if the SAS cables are not the correct type. To minimize the potential for problems:

a.Use cables no longer than six meters (LSI recommends using shorter cables, if possible)

b.Use cables that meet the SAS specification

c.Route the SAS cables carefully

Step 9. Turn on the Power to the System

Replace the computer cover and reconnect the AC power cords; then, turn on the computer. Ensure that the SAS and/or SATA II devices are powered up before or at the same time as the host computer. If the computer is powered up before a SAS or SATA II device, the device might not be recognized.

During boot, a BIOS message appears. The firmware takes several seconds to initialize. The configuration utility prompt times out after several seconds. The second portion of the BIOS message displays the MegaRAID 8480 Storage Adapter number, firmware version, and cache SDRAM size. The numbering of the controller follows the PCI slot scanning order used by the host mainboard.

Step 10. Run the WebBIOS Configuration Utility

Run the WebBIOS Configuration Utility to configure the physical arrays and the logical drives. When the message Press <Ctrl><H> for WebBIOS appears on the screen, press CTRL+H immediately to run the utility.

Step 11. Install the Operating System Driver

The RAID controller can operate under various operating systems. To operate under these operating systems, you must install the software drivers.The MegaRAID 8480 CD includes software drivers for the supported operating systems, along with documentation. You can download the latest drivers at http://www.ibm.com/support/. For updates, click Downloads and drivers.

For details on installing the driver, refer to the MegaRAID 8480 Device Driver Installation User’s Guide on the MegaRAID 8480

Detailed Installation

2-5

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

CD. Be sure to use the latest Service Packs provided by the operating system manufacturer and to review the readme file that accompanies the driver.

2.4SAS Device Cables

This section describes the cables used on the RAID controller and provides step-by-step instructions for connecting SAS and/or SATA II physical disks to the controller. The SAS and SATA II protocols use a thin, 7-wire connector instead of the 68-wire SCSI cable or 26-wire ATA cable.

Note: Use only straight SAS cables, not cross-over SAS cables.

Figure 2.2 displays the SAS cable that connects the internal connectors on a RAID controller to SAS drives.

Figure 2.2 Internal SAS Cable for Connection to SAS and/or

SATA II Physical Disks

Hard Drive

Connector

Serial Signal

Cables

RAID Controller to HDD

Breakout Cable

4-Lane Internal

Connector

SFF 8484

Figure 2.3 displays the SATA II device plug connector used to connect a RAID controller with internal connectors to the host receptable connector

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MegaRAID 8480 Hardware Installation

 

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on a backplane. A SATA II connector consists of a signal connector and a power connector.

Figure 2.3 SATA II Connectors

Device Plug

Connector

Serial ATA

Signal Connector

(pin 1)

Serial ATA Power Connector (pin 1)

Host Receptacle

Connector

Figure 2.4 shows SAS and SATA II connectors on SAS and SATA II physical disks, respectively. Cables are used for connection between internal connectors on the RAID controller and connectors on SAS and/or SATA II drives, respectively. Both SAS and SATA II physical disks can connect to SAS backplane receptable connectors. The difference between the SAS connector and SATA II connector is the bridge between the SAS primary physical link and power connector on the SAS controller, which the SATA II connector does not have.

Note: SAS backplane connectors can accept SAS or SATA II physical disks, but SATA II backplane connectors cannot accept SAS drives.

SAS Device Cables

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Figure 2.4 SAS and SATA II Plugs and SAS Backplane Receptacle Connector

SAS Primary

Physical Link

Power

SAS Primary

Physical Link

Power

SATA II

Physical Link

Serial Attached SCSI

SAS Backplane

Receptacle Connector

Power

Serial ATA

SAS Secondary

Physical Link

SATA II/SAS

Primary

Physical Link

Note: SATA II backplane connectors do not accept SAS drives.

The following subsection provides step-by-step instructions for connecting the MegaRAID 8480 RAID controller to SAS and SATA II physical disks, either directly or through an expander. Figure 2.5 shows the controller connected to physical disks and to expanders, which then connect to physical disks.

2.4.1Connecting the MegaRAID 8480 RAID Controller to Drive Boxes and Drive Expanders

Figure 2.5 shows how to connect the external SAS cable from the

MegaRAID 8480 RAID controller to drive boxes or drive enclosures.

Follow these steps to connect a RAID controller with external connectors to a drive box or drive enclosure.

Step 1. Connect the 4-lane external PCB receptacle plug on the external cable to the external connector on your RAID controller.

Step 2. Connect the plug on the other end of the SAS cable to the connector on the drive box or drive enclosure.

2-8

MegaRAID 8480 Hardware Installation

 

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Figure 2.5 Connecting the MegaRAID 8480 RAID Controller with External Connectors to a Drive Box or Drive Enclosure

To Drive Box

or Expander Board

4-Lane External PCB Receptacle and Plug and Cable with Jackscrews SFF-8470

2.5Replacing a Failed Controller Containing Data in the LSIiTBBU02

The MegaRAID intelligible Transportable Battery Backup Module 2 (LSIiTBBU02) is a cache memory module with an integrated battery pack. The module provides an uninterrupted power source to the module if power is unexpectedly interrupted while cached data is still present. If the power failure is the result of the MegaRAID 8480 Storage Adapter itself failing, then the LSIiTBBU02 can be moved to a new controller and the data can be recovered. The replacement controller must have a cleared configuration.

Note: See the Warranty and Support Information document for the replacement battery part number and battery-disposal instructions.

Replacing a Failed Controller Containing Data in the LSIiTBBU02

2-9

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Follow these steps to replace a failed controller with data in the transportable battery backup unit.

Step 1. Review all safety information provided with the server; then, power down the server and the drives.

Step 2. Remove the failed controller from the system.

Step 3. Remove the LSIiTBBU02 from the failed controller.

Step 4. Insert the LSIiTBBU02 into the replacement controller.

Step 5. Insert the replacement controller into the system.

Step 6. Power-on the system.

The controller then reads the disk configuration into NVRAM and flushes cache data to the virtual disks.

Note: Refer to the MegaRAID Battery Backup Unit User’s Guide for additional information about the LSIiTBBU02.

2.6After Installing the Storage Adapter

After MegaRAID 8480 Storage Adapter installation, you must configure the MegaRAID 8480 Storage Adapter and install the operating system driver. The MegaRAID 8480 Software User’s Guide instructs you on the configuration options and how to set them on your MegaRAID 8480 Storage Adapter. The MegaRAID 8480 Device Driver Installation User’s Guide provides detailed installation instructions for operating system drivers.

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Chapter 3

MegaRAID 8480 Storage

Adapter Characteristics

This chapter describes the characteristics of the LSI MegaRAID Serial Attached SCSI/Serial ATA II 8480 RAID Storage Adapter. It consists of the following sections:

Section 3.1, “MegaRAID 8480 RAID Controller”

Section 3.2, “MegaRAID 8480 Storage Adapter Characteristics”

Section 3.3, “Technical Specifications”

3.1MegaRAID 8480 RAID Controller

The MegaRAID 8480 RAID controller is a dual PHY, SAS PCI Express adapter and is used in a system with a PCI Express slot. PCI Express goes beyond the PCI specification in that it is intended as a unifying I/O architecture for various systems: desktops, workstations, mobile, server, communications, and embedded devices.

The following subsections provide graphics and connector information for the MegaRAID 8480 RAID controller.

MegaRAID 8480 Storage Adapter User’s Guide

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Copyright © 2006-2007 by LSI Corporation. All rights reserved.

3.1.1MegaRAID 8480 RAID Controller

The MegaRAID 8480 PCI Express Disk Array RAID Controller has one Intel IOP333 I/O processor, which controls eight internal SAS/SATA ports through two SAS 4x internal connectors.

This subsection provides the board layout and connector information for the MegaRAID 8480 RAID controller, which has eight external SAS/SATA connectors. Figure 3.1 displays the connectors on the controller, while Table 3.1 describes them.

Figure 3.1 Card Layout for the MegaRAID 8480 RAID Controller

 

J3

 

 

 

 

 

J2

Ports

J4

 

 

0–3

J6

J8

 

 

 

J5

J7

Ports

U6

 

 

4–7

U9

J11

J12

 

 

 

 

J9

 

 

 

P1

 

 

3-2

MegaRAID 8480 Storage Adapter Characteristics

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Table 3.1

MegaRAID 8480 RAID Controller – Connectors

 

 

 

 

Connector

Description

Type

Comments

 

 

 

 

J2

DIMM Socket

Socket

Holds cache memory module.

 

 

 

 

J3

Ports 0–3

x4 SAS

SAS 4x connector that connects to

 

 

ports

physical drives and expanders.

 

 

 

 

J5

Write Pending

2-pin

Connector for enclosure LED.

 

Indication LED

connector

When lit, it indicates the on-board

 

 

 

cache contains data and a write

 

 

 

from the cache to the hard drives is

 

 

 

pending. Optional.

 

 

 

 

J6

Firmware

2-pin

Reserved for LSI internal use.

 

Initialization

connector

 

 

Mode 0 or 3 Select

 

 

 

 

 

 

J7

On-board BIOS

2-pin

Reserved for LSI internal use.

 

Enable

connector

 

 

 

 

 

J8

Universal

4-pin

Reserved for LSI internal use.

 

Asynchronous

connector

 

 

Receiver/Transmitter

 

 

 

(UART) debugging

 

 

 

 

 

 

J9

Ports 4–7

x4 SAS

SAS 4x connector that connects to

 

 

ports

physical drives and expanders.

 

 

 

 

J11

Keyed I2C connector

3-pin

Used for enclosure management.

 

 

connector

Reserved for LSI internal use.

 

 

 

 

J12

Unkeyed I2C

3-pin

Used for enclosure management.

 

connector

connector

Reserved for LSI internal use.

 

 

 

 

MegaRAID 8480 RAID Controller

3-3

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

3.2MegaRAID 8480 Storage Adapter Characteristics

Table 3.2 shows the general characteristics for the MegaRAID 8480

RAID controller.

Table 3.2 MegaRAID 8480 Characteristics

Flash

Serial

 

 

SCSI

ROM1

EEPROM2

SAS Data Transfers

SCSI Features

Termination

 

 

 

 

 

Yes

Yes

Up to 3 Gbits/s per port

Plug and Play

Active

 

 

 

Scatter/Gather

 

 

 

 

Activity LED

 

 

 

 

 

 

1.For boot code and firmware.

2.For BIOS configuration storage.

The MegaRAID 8480 RAID controller ensures data integrity by intelligently validating the compatibility of the SAS domain. The 8480 uses Fusion-MPT architecture, which allows for thinner drivers and better performance.

3.3Technical Specifications

The design and implementation of the MegaRAID 8480 RAID controller minimizes electromagnetic emissions, susceptibility to radio frequency energy, and the effects of electrostatic discharge. The adapter carries the following marks and certifications:

CE mark

C-Tick mark

FCC Self-Certification logo

Canadian Compliance Statement, Korean MIC

Taiwan BSMI

Japan VCCI

In addition, the adapter meets the requirements of CISPR Class B.

3-4

MegaRAID 8480 Storage Adapter Characteristics

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

The MegaRAID 8480 RAID controller and the LSIiTBBU02 are CSA C22.2 No. 60950-1, UL 60950-1 First Edition listed Accessory, UL file number E257743.

3.3.1Storage Adapter Specifications

Table 3.3 lists the specifications for the MegaRAID 8480 RAID controller.

Table 3.3

Storage Adapter Specifications

 

 

 

Specification

 

MegaRAID 8480 RAID Controller

 

 

 

Processor

 

Intel IOP333 I/O processor @ 500 MHz

(PCI Express Host

 

Controller to PCI

 

Secondary I/O

 

Controller)

 

 

 

 

Operating Voltage

+3.3 V, +12 V

 

 

 

Card Size

 

8480 RAID Controller: Standard height, half-length PCI

 

 

Express adapter card size (4.376" x 6.6")

 

 

Array Interface

PCI Express Rev 1.0a

to Host

 

 

 

 

Type of Drives

Serial Attached SCSI (SAS) and Serial ATA II (SATA II)

Supported

 

 

 

 

PCI Express Bus

Up to 2.5 Gbits/s per lane

Data Transfer Rate

x8 lane width (with support for downshifting for

 

 

motherboards with x1 and x4 connections)

 

 

Up to 2 Gbytes/s per direction for SAS x8 cards

 

 

(4 Gbytes/s total)

 

 

 

Serial Port

 

3-pin RS232-compatible connector (for manufacturing

 

 

use only)

 

 

SAS Controller(s)

One LSISAS1068 Single SAS controller

 

 

SAS Bus Speed

3 Gbits/s

 

 

 

SAS Ports

 

Two SAS connectors with four SAS ports each

 

 

Cache Configuration

8480 RAID controller: Integrated 256 Mbyte Double Data

 

 

Rate II 400 MHz SDRAM intelligent transportable battery-

 

 

backed DIMM module

 

 

Size of Flash ROM

4 Mbytes

for Firmware

 

 

 

 

Nonvolatile Random

32 Kbytes for storing RAID configuration

Access Memory

 

(NVRAM)

 

 

 

 

 

Technical Specifications

3-5

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

3.3.2Array Performance Features

Table 3.4 shows the MegaRAID 8480 Storage Adapter array performance

features.

 

 

 

Table 3.4

Array Performance Features

 

 

 

Specification

 

MegaRAID 8480 RAID Controller

 

 

 

PCI Express Host Data Transfer

2.5

Gbits/s per lane

Rate

 

 

 

 

 

 

Drive Data Transfer Rate

3.0

Gbits/s per lane

 

 

Maximum Scatter/Gathers

26 elements

 

 

 

Maximum Size of I/O Requests

6.4

Mbytes in 64 Kbyte stripes

 

 

Maximum Queue Tags per Drive

As many as the drive can accept

 

 

 

Stripe Sizes

 

8, 16, 32, 64, or 128 Kbyte

 

 

 

Maximum Number of Concurrent

255

 

Commands

 

 

 

 

 

 

Support for Multiple Initiators

Yes

 

 

 

 

 

3.3.3Fault Tolerance

Table 3.5 shows the fault tolerance features of the Megaraid 8480

Storage Adapter.

 

Table 3.5

Fault Tolerance Features

 

 

 

Specification

 

MegaRAID 8480 RAID Controller

 

 

Support for SMART1

Yes

Optional Battery Backup for

LSIiTBBU02 battery backup. 4.8V/880mAH

Cache Memory

battery pack; up to 72 hours of data retention

 

 

for 256 Mbytes

 

 

Drive Failure Detection

Automatic

 

 

Drive Rebuild Using Hot Spares

Automatic

 

 

Parity Generation and Checking

Yes

 

 

 

1.The Self Monitoring Analysis and Reporting Technology (SMART) detects up to 70 percent of all predictable disk drive failures. In addition, SMART monitors the internal performance of all motors, heads, and drive electronics.

3-6

MegaRAID 8480 Storage Adapter Characteristics

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

3.3.4Electrical Characteristics

This subsection provides the power requirements for the MegaRAID 8480 RAID controller. Table 3.6 lists the maximum power requirements.

Table 3.6

Maximum Power Requirements

 

 

 

 

 

 

PCI Express

PCI Express

RAID Controller

+12 V

+3.3 V

 

 

 

MegaRAID 8480

12 W; used only if battery

9 W

 

 

is present

 

 

 

 

 

3.3.5Operating and Non-operating Conditions

For the MegaRAID 8480 RAID controller, the operating (thermal and atmospheric) conditions are:

Relative humidity range is 5% to 90% noncondensing

Airflow must be at least 200 linear feet per minute (LFPM) to avoid operating the Intel IOP333 processor above the maximum ambient temperature

The parameters for the non-operating (such as storage and transit) environment for the 8480 are:

Temperature range: −30 °C to +80 °C without battery backup unit

Temperature range: 0 °C to +45 °C with LSIiTBBU02 battery backup

3.3.6Safety Characteristics

The MegaRAID 8480 RAID controller meets or exceeds the requirements of UL flammability rating 94 V0. Each bare board is also marked with the supplier name or trademark, type, and UL flammability rating. The board is installed in a PCI Express bus slot, so all voltages are lower than the SELV 42.4 V limit.

Technical Specifications

3-7

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

3-8

MegaRAID 8480 Storage Adapter Characteristics

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

Appendix A

Glossary of Terms

and Abbreviations

active

The electrical connection required at each end of the SCSI bus,

termination

composed of active voltage regulation and a set of termination resistors.

array

An array of disk drives combines the storage space on the disk drives

 

into a single segment of storage space. A hot spare drive does not

 

actively participate in an array.

BIOS

Acronym for Basic Input/Output System. Software that provides basic

 

read/write capability. Usually kept as firmware (ROM-based). The system

 

BIOS on the mainboard of a computer boots and controls the system.

 

The BIOS on your host adapter acts as an extension of the system BIOS.

configuration

Refers to the way a computer is set up, the combined hardware

 

components (computer, monitor, keyboard, and peripheral devices) that

 

make up a computer system, or the software settings that allow the

 

hardware components to communicate with each other.

device driver

domain validation

EEPROM

external SAS device

Fusion-MPT architecture

A program that allows a microprocessor (through the operating system) to direct the operation of a peripheral device.

Domain Validation is a software procedure in which a host queries a device to determine its ability to communicate at the negotiated data rate.

Acronym for Electronically Erasable Programmable Read-Only Memory. It is a memory chip that typically stores configuration information, as it provides stable storage for long periods without electricity and can be reprogrammed. Refer to NVRAM.

A SAS device installed outside the computer cabinet. These devices are connected using specific types of shielded cables.

Fusion-MPT (Message Passing Technology) architecture consists of several main elements: Fusion-MPT firmware, the Fibre Channel and SCSI hardware, and the operating system level drivers that support these

MegaRAID 8480 Storage Adapter User’s Guide

A-1

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

 

architectures. Fusion-MPT architecture offers a single binary, operating

 

system driver that supports both Fibre Channel and SCSI devices.

host

The computer system in which a storage adapter is installed. It uses the

 

storage adapter to transfer information to and from devices attached to

 

the SCSI bus.

host adapter

A circuit board or integrated circuit that provides a device connection to

board

the computer system.

hot spare

An idle, powered on, standby drive ready for immediate use in case of

 

disk failure. It does not contain any user data. A hot spare can be

 

dedicated to a single redundant array or it can be part of the global

 

hot-spare pool for all arrays managed by the controller.

 

When a disk fails, the controller firmware automatically replaces and

 

rebuilds the data from the failed drive to the hot spare. Data can be

 

rebuilt only from virtual disks with redundancy (RAID levels 1, 5, 10, and

 

50; not RAID level 0), and the hot spare must have sufficient capacity.

internal SAS

A SAS device installed inside the computer cabinet. These devices are

device

connected by using a shielded cable.

main memory

The part of a computer’s memory which is directly accessible by the CPU

 

(usually synonymous with RAM).

NVRAM

Acronym for Nonvolatile Random Access Memory. An EEPROM

 

(Electronically Erasable Read-Only Memory chip) that stores

 

configuration information. Refer to EEPROM.

PCI

Acronym for Peripheral Component Interconnect. A high-performance,

 

local bus specification that allows the connection of devices directly to

 

computer memory. The PCI Local Bus allows transparent upgrades from

 

32-bit data path at 33 MHz to 64-bit data path at 33 MHz, and from 32-bit

 

data path at 66 MHz to 64-bit data path at 66 MHz.

PCI Express

Acronym for Peripheral Component Interconnect Express. A

 

high-performance, local bus specification that allows the connection of

 

devices directly to computer memory. PCI Express is a two-way, serial

 

connection that transfers data on two pairs of point-to-point data lines.

 

PCI Express goes beyond the PCI specification in that it is intended as

 

a unifying I/O architecture for various systems: desktops, workstations,

 

mobile, server, communications, and embedded devices.

A-2

Glossary of Terms and Abbreviations

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

 

peripheral

A piece of hardware (such as a video monitor, disk drive, printer, or

devices

CD-ROM) used with a computer and under the control of the computer.

 

SCSI peripherals are controlled through a MegaRAID 8480 Storage

 

Adapter (host adapter).

PHY

The interface required to transmit and receive data packets transferred

 

across the serial bus.

 

Each PHY can form one side of the physical link in a connection with a

 

PHY on a different SATA device. The physical link contains four wires that

 

form two differential signal pairs. One differential pair transmits signals,

 

while the other differential pair receives signals. Both differential pairs

 

operate simultaneously and allow concurrent data transmission in both

 

the receive and the transmit directions.

RAID

Acronym for Redundant Array of Independent Disks (originally

 

Redundant Array of Inexpensive Disks). An array of multiple independent

 

physical disks managed together to yield higher reliability and/or

 

performance exceeding that of a single physical disk. The RAID array

 

appears to the controller as a single storage unit. I/O is expedited

 

because several disks can be accessed simultaneously. Redundant

 

RAID levels (RAID levels 1, 5, 10, and 50) provide data protection.

RAID levels

A set of techniques applied to disk groups to deliver higher data

 

availability, and/or performance characteristics to host environments.

 

Each virtual disk must have a RAID level assigned to it.

SAS

Acronym for Serial Attached SCSI. A serial, point-to-point,

 

enterprise-level device interface that leverages the proven SCSI protocol

 

set. The SAS interface provides improved performance, simplified

 

cabling, smaller connections, lower pin count, and lower power

 

requirements when compared to parallel SCSI. The SAS controller

 

leverages a common electrical and physical connection interface that is

 

compatible with Serial ATA. The SAS controller supports the ANSI Serial

 

Attached SCSI standard, version 1.0. In addition, the controller supports

 

the Serial ATA II (SATA II) protocol defined by the Serial ATA

 

specification, version 1.0a. Supporting both the SAS and SATA II

 

interfaces, the SAS controller is a versatile controller that provides the

 

backbone of both server and high-end workstation environments. Each

 

port on the RAID controller supports SAS and/or SATA II devices.

A-3

Copyright © 2006-2007 by LSI Corporation. All rights reserved.

SAS device

Any device that conforms to the SAS standard and is attached to the

 

SAS bus by a SAS cable. This includes SAS storage adapters

 

(host adapters) and SAS peripherals.

SATA

Acronym for Serial Advanced Technology Attachment. A physical storage

 

interface standard, SATA is a serial link that provides point-to-point

 

connections between devices. The thinner serial cables allow for better

 

airflow within the system and permit smaller chassis designs.

SMP

Acronym for Serial Management Protocol. SMP enables communicates

 

topology management information directly with an attached SAS

 

expander device. Each PHY on the controller can function as an SMP

 

initiator.

SSP

Acronym for Serial SCSI Protocol. SSP enables communication with

 

other SAS devices. Each PHY on the SAS controller can function as an

 

SSP initiator or SSP target.

STP

Acronym for Serial Tunneling Protocol. STP enables communication with

 

a SATA II device through an attached expander. Each PHY on the SAS

 

controller can function as an STP initiator.

stripe size

The total disk space consumed by a stripe not including a parity disk. For

 

example, consider a stripe that contains 64 Kbytes of disk space and has

 

16 Kbytes of data residing on each disk in the stripe. In this case, the

 

stripe size is 64 Kbytes and the stripe element size is 16 Kbytes. The

 

stripe depth is four (four physical disks in the stripe). You can specify

 

stripe sizes of 8 Kbytes, 16 Kbytes, 32 Kbytes, 64 Kbytes, or 128 Kbytes

 

for each virtual disk. A larger stripe size produces improved read

 

performance, especially if most of the reads are sequential. For mostly

 

random reads, select a smaller stripe size.

striping

Disk striping writes data across two or more disks. Each stripe spans two

 

or more disks but consumes only a portion of each disk. Each disk,

 

therefore, may have several stripes. The amount of space consumed by

 

a stripe is the same on each disk included in the stripe. The portion of

 

a stripe that resides on a single disk is a stripe element. Striping by itself

 

does not provide data redundancy; striping in combination with parity

 

provides data redundancy.

A-4

Glossary of Terms and Abbreviations

 

Copyright © 2006-2007 by LSI Corporation. All rights reserved.