Broadcom MR SAS RAID Controllers UG User guide

USER’S
GUIDE
MegaRAID® 1078-based
SAS RAID Controllers
September 2007
80-00157-01 Rev. B
This document contains proprietary information of LSI Corporation. The
information contained herein is not to be used by or disclosed to third parties
without the express written permission of an officer of LSI Corporation.
LSI products are not intended for use in life-support appliances, devices, or
systems. Use of any LSI product in such applications without written consent of
the appropriate LSI officer is prohibited.
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.
Document 80-00157-01 Rev. B, September 2007. This document describes the
current versions of the LSI Corporation MegaRAID SAS RAID controllers and will
remain the official reference source for all revisions/releases of these products
until rescinded by an update.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; nor does the purchase or use of a product from LSI
convey a license under any patent rights, copyrights, trademark rights, or any
other of the intellectual property rights of LSI or third parties.
Copyright © 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 us at http://www.lsi.com.
For a current list of our distributors, sales offices, and design resource
centers, view our web page located at
http://www.lsi.com/contacts/index.html
ii
Copyright © 2007 by LSI Corporation. All rights reserved.
Preface
This document is the primary reference and user’s guide for the LSI
MegaRAID® Serial Attached SCSI/SATA II RAID Controllers based on
the LSISAS1078, which is a SAS/SATA RAID On-a-Chip device. It
contains complete installation instructions for these RAID controllers and
includes specifications for them.
The MegaRAID 1078-based Serial Attached SCSI (SAS) RAID controller
family consists of the following controllers:
•
MegaRAID SAS 8704ELP PCI Express Low-Profile Serial-Attached
SCSI/SATA II Disk Array Controller with Internal Connectors
•
MegaRAID SAS 8708ELP PCI Express Low-Profile Serial-Attached
SCSI/SATA II Disk Array Controller with Internal Connectors
•
MegaRAID SAS 8708EM2 PCI Express Serial-Attached SCSI/SATA
II Disk Array Controller with Internal Connectors
•
MegaRAID SAS 8880EM2 PCI Express Serial-Attached SCSI/SATA
II Disk Array Controller with External Connectors
•
MegaRAID SAS 8888ELP PCI Express Low-Profile Serial-Attached
SCSI/SATA II Disk Array Controller with External Connectors and
Internal Connectors
For details on how to configure the RAID controllers, refer to the
MegaRAID SAS Software User’s Guide. For information about the
operating system drivers, refer to the MegaRAID SAS 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:
MegaRAID 1078-based SAS RAID Controllers User’s Guide
Copyright © 2007 by LSI Corporation. All rights reserved.
iii
•
Engineers who are designing a system that will include a MegaRAID
1078-based SAS RAID controller
•
Anyone who is installing a MegaRAID 1078-based SAS RAID
controller in a RAID system
Organization
This document contains the following chapters and appendix:
•
Chapter 1, Overview, provides an overview of the MegaRAID 1078based SAS RAID controllers.
•
Chapter 2, MegaRAID SAS Hardware Installation, describes the
procedures for installing the MegaRAID 1078-based SAS RAID
controllers.
•
Chapter 3, MegaRAID SAS RAID Controller Characteristics,
provides the characteristics and technical specifications for the
MegaRAID 1078-based SAS RAID controllers.
•
Appendix A, Glossary of Terms and Abbreviations, lists and
defines the terms and abbreviations used in this document.
Related Publications
MegaRAID SAS Device Driver Installation User’s Guide
Document Number: 80-00163-01 Rev. B
This document describes 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 SAS RAID controllers.
MegaRAID SAS Software User’s Guide
Document Number: 80-00156-01 Rev. C
This document describes how to use the MegaRAID Storage Manager,
WebBIOS, and command line interface (CLI) utilities to configure,
monitor, and maintain MegaRAID SAS RAID controllers and the
storage-related devices connected to them.
iv
Preface
Copyright © 2007 by LSI Corporation. All rights reserved.
Intelligent Battery Backup Units for 1078-based MegaRAID Products
User’s Guide
Document Number: 80-00162-01 Rev. B
This document describes how to install and use the LSI battery backup
units for MegaRAID 1078-based SAS RAID controllers. The 1078-based
SAS boards use the LSI intelligent Battery Backup Unit 01 (LSIiBBU01),
LSI intelligent Battery Backup Unit 05 (LSIiBBU05), LSI intelligent Battery
Backup Unit 06 (LSIiBBU06), LSI intelligent Battery Backup Unit 07
(LSIiBBU07), and the LSI intelligent Transportable Battery Backup Unit
03 (LSIiTBBU03).
Conventions
The following table describes how the user interacts 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 variables. Replace italicized text with appropriate userspecified items. Enter items of the type called for, using
lowercase.
Initial capital letters
Undo
Edit
Apply
Names of menu commands, options, check buttons, text
buttons, options buttons, text boxes, list boxes, and so on.,
are shown in text with Initial Capital lettering to avoid misreading. These elements might appear on your screen in
all lowercase.
Semicolon, and other
punctuation
Use as shown in the text.
Note:
Caution:
Notes contain supplementary information that can affect
system performance.
Cautions are notifications that an action has the potential to
adversely affect equipment operation, system performance,
or data integrity.
Preface
Copyright © 2007 by LSI Corporation. All rights reserved.
v
Revision History
Document Number Date/Version
Remarks
80-00157-01 Rev. B September 2007
Added the SAS 8708EM2 RAID controller, and the SAS
8880EM2 RAID controller
80-00157-01 Rev. A February 2007
Initial release of the document.
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 1078-based SAS RAID controllers
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:
Caution:
•
•
vi
Do not operate your computer system with any covers
(such as computer covers, bezels, filler brackets, and
front-panel inserts) removed.
To avoid damaging your computer, make sure that 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 American and South
American countries, 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 make sure that your monitor and attached peripherals are
electrically rated to operate with the AC power available in your
location.
To 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.
Preface
Copyright © 2007 by LSI Corporation. All rights reserved.
•
To prevent electric shock, connect the computer and peripheral
power cords into correctly grounded power sources. These cords are
equipped with three-prong plugs to ensure correct grounding.
•
Do not use adapter plugs or remove the grounding prong from a
cable. If you must use an extension cable, use a three-wire cable
with correctly grounded plugs.
•
To protect your computer system from sudden, transient increases
and decreases in electrical power, use a surge suppressor, line
conditioner, or uninterruptible power supply (UPS).
•
Make sure that equipment does not rest 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 –
Caution:
Do not attempt to service the computer system yourself,
except as explained in this document and elsewhere in
LSI Logic documentation. Always follow installation and
service instructions closely.
1. Turn off your computer and any peripherals.
2. Disconnect your computer and peripherals from their power sources.
Also disconnect any telephone or telecommunications lines from
the computer.
Performing these actions reduces the potential for personal injury or
shock.
Also note these safety guidelines:
•
When you disconnect a cable, pull on its connector or on its
strain-relief loop, not on the cable itself. Some cables have a
Preface
Copyright © 2007 by LSI Corporation. All rights reserved.
vii
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 that 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.
To discharge static electricity, touch 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:
viii
•
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.
Preface
Copyright © 2007 by LSI Corporation. All rights reserved.
Contents
Chapter 1
Chapter 2
Overview
1.1
Overview
1.2
SAS Controller Descriptions
1.3
General Description
1.4
Configuration Scenarios
1.5
Benefits of the SAS Interface
1.5.1
PCI Express Architecture
1.5.2
Operating System Support
1.6
Summary of SAS RAID Controller Characteristics
1.6.1
SAS Features
1.6.2
SAS Array Limitations
1.6.3
SATA II Features
1.6.4
PCI Express Performance
1.6.5
Usability Features
1.6.6
Flexibility Features
1.6.7
Drive Roaming
1.6.8
Drive Migration
1.7
Hardware Specifications
1.8
Technical Support
MegaRAID SAS Hardware Installation
2.1
Requirements
2.2
Quick Installation
2.3
Detailed Installation
2.4
SAS Device Cables
2.4.1
Connecting the SAS RAID Controller
with External Connectors to Drive Boxes
and Drive Enclosures
MegaRAID 1078-based SAS RAID Controllers User’s Guide
Copyright © 2007 by LSI Corporation. All rights reserved.
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2.4.2
2.5
2.6
Chapter 3
Appendix A
Connecting the SAS RAID Controller
with Internal Connectors to Physical Disks
Replacing a Failed Controller Containing Data
in the LSIiTBBU03
After Installing the RAID Controller
MegaRAID SAS RAID Controller Characteristics
3.1
MegaRAID 1078-based SAS RAID Controller Family
3.1.1
MegaRAID SAS 8704ELP/8708ELP
RAID Controllers
3.1.2
MegaRAID SAS 8708EM2 RAID Controllers
3.1.3
MegaRAID SAS 8880EM2 RAID Controller
3.1.4
MegaRAID SAS 8888ELP RAID Controller
3.2
MegaRAID SAS 1078-based RAID Controller
Characteristics
3.3
Technical Specifications
3.3.1
RAID Controller Specifications
3.3.2
Array Performance Features
3.3.3
Fault Tolerance
3.3.4
Electrical Characteristics
Power Supply Requirements for the
SAS 8704ELP and SAS 8708ELP RAID
Controllers
Power Supply Requirements for the
SAS 8708EM2 RAID Controller
Power Supply Requirements for the
SAS 8880EM2 RAID Controllers
Power Supply Requirements for the
SAS 8888ELP RAID Controller
3.3.5
Operating and Non-operating Conditions
3.3.6
Safety Characteristics
Glossary of Termsand Abbreviations
Customer Feedback
x
Contents
Copyright © 2007 by LSI Corporation. All rights reserved.
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Figures
1.1
1.2
2.1
2.2
2.3
2.4
2.5
2.6
3.1
3.2
3.3
3.4
Example of an LSI SAS Direct-Connect Application
Example of an LSI SAS RAID Controller Configured
with an LSISASx12 Expander
Example of the MegaRAID SAS 8708ELP Board
Installation in a PCI Express Slot
Internal SAS Cable for Connection to SAS Physical
Disks, SATA II Physical Disks, or Both
SATA II Connectors
SAS and SATA II Plugs and SAS Backplane
Receptacle Connector
Connecting the SAS 8888E RAID Controller with
External Connectors to a Drive Box or Drive Enclosure
Connecting a SAS 8708ELP RAID Controller
with Internal Connectors to Physical Disks
Card Layout for the MegaRAID SAS 8708ELP
RAID Controller
Card Layout for the MegaRAID SAS 8708EM2
RAID Controller
Card Layout for the MegaRAID SAS 8880EM2
RAID Controller
Card Layout for the MegaRAID SAS 8888ELP
RAID Controller
Contents
Copyright © 2007 by LSI Corporation. All rights reserved.
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Contents
Copyright © 2007 by LSI Corporation. All rights reserved.
Tables
1.1
1.2
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
SAS RAID Controller Array Limitations
MegaRAID 1078-based SAS RAID Controller
Comparisons
SAS 8708ELP RAID Controller – Jumpers and Connectors
SAS 8708EM2 RAID Controller – Jumpers and Connectors
SAS 8880EM2 RAID Controller – Jumpers and
Connectors
SAS 8888ELP RAID Controller – Jumpers and
Connectors
MegaRAID 1078-based SAS RAID Controller
Characteristics
RAID Controller Specifications
Array Performance Features
Fault Tolerance Features
Power Supply for the SAS 8704ELP and the
SAS 8708ELP RAID Controllers
Power Supply for the SAS 8708EM2 RAID Controllers
Power Supply for the SAS 8880EM2 RAID Controller
Power States for the SAS 8888ELP RAID Controller
Contents
Copyright © 2007 by LSI Corporation. All rights reserved.
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Contents
Copyright © 2007 by LSI Corporation. All rights reserved.
Chapter 1
Overview
This chapter provides an overview of the MegaRAID 1078-based Serial
Attached SCSI/Serial ATA II controllers with RAID control capabilities. It
consists of the following sections:
1.1
•
Section 1.1, “Overview”
•
Section 1.2, “SAS Controller Descriptions”
•
Section 1.3, “General Description”
•
Section 1.4, “Configuration Scenarios”
•
Section 1.5, “Benefits of the SAS Interface”
•
Section 1.6, “Summary of SAS RAID Controller Characteristics”
•
Section 1.7, “Hardware Specifications”
•
Section 1.8, “Technical Support”
Overview
The MegaRAID 1078-based SAS RAID controllers are high-performance
intelligent PCI Express-to-SCSI/Serial ATA II adapters with RAID control
capabilities. MegaRAID 1078-based SAS RAID controllers provide
reliability, high performance, and fault-tolerant disk subsystem
management. They are an ideal RAID solution for the internal storage of
workgroup, departmental, and enterprise systems. MegaRAID 1078based SAS RAID controllers offer a cost-effective way to implement
RAID in a server.
SAS technology brings a wealth of options and flexibility with the use of
SAS 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 1078-based SAS RAID Controllers User’s Guide
Copyright © 2007 by LSI Corporation. All rights reserved.
1-1
two similar technologies on the same controller, within the same
enclosure, and in the same virtual disk.
Note:
LSI recommends that you carefully assess any decision to
mix SAS and SATA drives within the same virtual disks.
Although you can mix drives, LSI strongly discourages the
practice.
The MegaRAID 1078-based SAS RAID controllers are based on the LSI
first-to-market SAS IC technology and proven MegaRAID technology. As
second-generation PCI Express RAID controllers, the MegaRAID SAS
RAID controllers address the growing demand for increased data
throughput and scalability requirements across midrange and enterpriseclass server platforms. LSI offers a family of MegaRAID SAS RAID
controllers addressing the needs for both internal and external solutions.
The following battery backup units provide cached data protection and
allow system builders to protect cached data even during the most
catastrophic system failures:
•
LSI intelligent Battery Backup Unit 01 (LSIiBBU-01)
•
LSI intelligent Battery Backup Unit 05 (LSIiBBU-05)
•
LSI intelligent Battery Backup Unit 06 (LSIiBBU-06)
•
LSI intelligent Battery Backup Unit 07 (LSIiBBU-07)
•
LSI intelligent Transportable Battery Backup Unit 03 (LSIiTBBU-03)
Refer to the MegaRAID Battery Backup Unit User’s Guide on the
MegaRAID Universal Software Suite CD for more information about
these batteries.
The SAS controllers support 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 SAS controller is a versatile controller
that provides the backbone of both server and high-end workstation
environments.
Each port on the SAS RAID controller supports SAS devices, SATA II
devices, or both, using the following protocols:
•
1-2
SAS Serial SCSI Protocol (SSP), which enables communication with
other SAS devices
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
1.2
•
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
SAS Controller Descriptions
The 1078-based SAS RAID controllers are described as follows:
1.3
•
The MegaRAID SAS 8704ELP PCI Express 1078-based Low-Profile
Serial-Attached SCSI/SATA II Disk Array Controller controls four
internal SAS/SATA ports through one Mini SAS 4i internal connector.
•
The MegaRAID SAS 8708ELP PCI Express 1078-based Low-Profile
Serial-Attached SCSI/SATA II Disk Array Controller controls eight
internal SAS/SATA ports through two Mini SAS 4i internal connectors
•
The MegaRAID SAS 8708EM2 PCI Express 1078-based SerialAttached SCSI/SATA II Disk Array Controller controls eight internal
SAS/SATA ports through two SFF-8087 Mini SAS 4i internal
connectors
•
The MegaRAID SAS 8880EM2 PCI Express 1078-based SerialAttached SCSI/SATA II Disk Array Controller controls eight external
SAS/SATA ports through two SFF-8088 Mini SAS 4x external
connectors
•
The MegaRAID SAS 8888ELP PCI Express 1078-based Low-Profile
Disk Array RAID Controller has one I/O processor. This processor
controls eight ports through two (x4 SAS Port) SFF-8088 Mini SAS
4x external connectors and two (x4 SAS Port) SFF-8087 Mini SAS
4i internal connectors, configurable through a SAS mux.
General Description
The MegaRAID 1078-based SAS RAID controllers bring 3.0 Gbit/s Serial
Attached SCSI and 3.0 Gbit/s SATA II performance to host adapter,
workstation, and server designs. The controllers support internal and
SAS Controller Descriptions
Copyright © 2007 by LSI Corporation. All rights reserved.
1-3
external storage devices, which allow you to use a system that supports
enterprise-class SAS drives and desktop-class SATA II drives. Each
MegaRAID 1078-based SAS RAID controller can connect to drives
directly and can use expanders to connect to additional drives. Simplified
cabling between devices is an additional benefit.
These SAS controllers are based on the LSISAS1078 RAID On-a-Chip
(ROC) device. This device is compliant with the Fusion-MPT™
architecture and provides a PCI Express x4 or x8 interface.
Note:
The MegaRAID SAS 8704ELP RAID controller and the
MegaRAID SAS 8704ELP RAID controller provide an x4
PCI Express interface. The MegaRAID SAS 8708EM2, the
MegaRAID SAS 8880EM2, and the MegaRAID SAS
8888ELP RAID controllers provide an x8 PCI Express
interface.
The LSISAS1078 ROC device provides an eight-lane, 2.5-Gbit/s PCI
Express host interface, eight 3.0 Gbit/s SAS or SATA ports, and a fullfeatured, hardware-based RAID implementation. The LSISAS1078 ROC
device integrates a high-speed DDR/DDR2 SDRAM interface with a
hardware RAID assist engine for parity calculations. The LSISAS1078
ROC device provides the maximum benefits of a RAID system and
enables you to configure the system to satisfy your system requirements.
The LSISAS1078 ROC device increases system performance and
provides fault-tolerant data storage. The LSISAS1078 supports data
striping across multiple disks, which reduces disk access time because
multiple disks simultaneously read or write data. The LSISAS1078 ROC
device backs up data with either data mirroring or a parity block. Either
backup method enables you to recover lost data in the event of a disk
failure. You can select the data backup method that best suits your
needs. A hardware RAID assist exclusive-OR (XOR) engine speeds
parity generation and checking and reduces system-access times.
The SAS RAID controllers integrate 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.
The LSISAS1078 ROC device adheres to the PCI Express Specification,
Revision 1.0a. The PCI Express software is backward compatible with
previous revisions of the PCI bus and PCI-X bus.
1-4
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
The SAS RAID controllers support the SAS protocol as described in the
Serial Attached SCSI Standard, version 1.1. The controllers also support
the Serial ATA II (SATA II) protocol defined by the Serial ATA
Specification, Version 1.0a and the Serial ATAII; Extension to the Serial
ATA Specification, Version 1.1. SATA II is an extension to SATA 1.0a. In
addition, the SAS RAID controllers support the following SATA II features:
•
3 Gbit/s SATA II
•
Staggered spin-up
•
Hot plug
•
Native command queuing
•
Activity and fault indicators for each PHY
•
Port selector (for dual-port drives)
Each port on the SAS controllers supports SAS devices, SATA II devices,
or both using SSP, SMP, STP, and SATA II. SSP enables communication
with other SAS devices. SATA II enables the SAS controllers to
communicate with other SATA II devices.
1.4
Configuration Scenarios
There are three main scenarios in which you can use the SAS RAID
controllers:
•
Low-end, internal SATA II configurations: In this configuration, use
the RAID controller as a high-end SATA II compatible controller that
connects up to eight disks either directly or through a port expander.
This configuration is mostly for low-end or entry servers. Enclosure
management is provided through out-of-band I2C bus. Side bands of
both types of internal SAS connectors support the SFF-8485
(SGPIO) interface.
•
Midrange internal SAS configurations: This is like the internal
SATA II configurations, but with high-end disks. This is more suitable
for low-range to midrange servers.
•
High-end external SAS/SATA II configurations: This configuration
is for both internal and external connectivity, using SATA II drives,
SAS drives, or both. External enclosure management is supported
Configuration Scenarios
Copyright © 2007 by LSI Corporation. All rights reserved.
1-5
through in-band, SCSI-enclosed storage. The configuration must
support STP and SMP.
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.
Note:
Figure 1.1
The external memory bus is 32-bit for the SAS 8704ELP
and the SAS 8708ELP, and 64-bit for the SAS 8708EM2,
the SAS 8880EM2, and the SAS 8888ELP.
Example of an LSI SAS Direct-Connect Application
SAS/SATA II Device
SAS/SATA II Device
SAS
PCI Express
RAID Controller
SAS/SATA II Device
32-Bit Memory
Address/Data
Bus
I2 C
Interface
Flash ROM/
PSBRAM/
NVSRAM
I2 C
SAS/SATA II Device
PCI Express Interface
Figure 1.2 shows an example of a SAS RAID controller configured with
an LSISASx12 expander that is connected to SAS disks, SATA II disks,
or both.
1-6
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
Figure 1.2
Example of an LSI SAS RAID Controller Configured
with an LSISASx12 Expander
PCI Express Interface
8
SAS RAID Controller
LSISAS1078
PCI Express to SAS ROC
SAS/SATA
Drives
LSISASx12
Expander
SAS/SATA II
Drives
1.5
SAS/SATA II
Drives
Peripheral
Bus
72-bit DDR/DDR2
with ECC
Interface
Flash ROM/
NVSRAM/
I2C/UART
SRAM
SDRAM
SRAM
LSISASx12
Expander
SAS/SATA II
Drives
SAS/SATA II
Drives
Benefits 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 it
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.
SAS controllers leverage 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
Benefits of the SAS Interface
Copyright © 2007 by LSI Corporation. All rights reserved.
1-7
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.
1.5.1
PCI 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 RAID controllers 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.
1.5.2
Operating System Support
The MegaRAID 1078-based SAS RAID controllers supports the following
operating systems:
•
Windows 2000, Windows Server 2003, and Windows XP
•
Red Hat Linux
•
SUSE Linux
•
Novell NetWare
•
SCO OpenServer
•
SCO UnixWare
•
FreeBSD
To download the latest operating system drivers, you can access
http://www.lsi.com/cm/DownloadSearch.do.
The MegaRAID 1078-based SAS RAID controllers use Fusion-MPT™
architecture for all major operating systems, thinner drivers, and better
performance.
1-8
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
1.6
Summary of SAS RAID Controller Characteristics
This section provides a summary of the features and benefits of the
SAS RAID controller. It contains information on SAS features, SATA II
features, PCI performance, integration, usability, and flexibility.
The MegaRAID 1078-based SAS RAID controllers include the following
features:
•
PCI Express x4 lane width for the SAS 8704ELP RAID controller and
the SAS 8708ELP RAID controller (with support for x8 and x16
connections)
•
PCI Express x8 lane width for the SAS 8708EM2 RAID controller, the
SAS 8880EM2 RAID controller, and the SAS 8888ELP RAID
controller (with support for x16 connections)
•
PCI Express performance up to 2.5 Gbits/s per lane
•
Support for 128-, 256-, or 512-Mbyte DDR2 667 MHz on-board
SDRAM intelligent battery-backed module (SAS 8704ELP, SAS
8708ELP, and SAS 8880EM2 RAID controllers)
•
Support for 128- or 256-Mbyte DDR2 667 MHz on-board SDRAM
intelligent battery-backed module (SAS 8708EM2 RAID controller)
•
Support for 256- and 512-Mbyte DDR2 667 MHz on-board SDRAM
intelligent transportable battery-backed MiniDIMM module (SAS
8888ELP RAID controller)
•
One internal connector for the SAS 8704ELP RAID controller
•
Two internal connectors for the SAS 8708ELP RAID controller and
the SAS 8708EM2 RAID controller
•
Two external connectors for the SAS 8880ELP RAID controller
•
Two external connectors and two internal connectors for the SAS
8888ELP RAID controller
•
Support for RAID levels 0, 1, 5, 6, 10, 50, and 60
•
Advanced array configuration and management utilities
•
Online RAID level migration
•
Drive migration
•
Drive roaming
Summary of SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
1-9
1.6.1
•
Patrol read
•
No reboot necessary after expansion
•
More than 200 Qtags per array
•
Hardware clustering support on the board
•
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.
SAS Features
The following list describes the SAS features of the RAID controllers:
•
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 122 devices through
the use of expanders
Note:
1.6.2
The number of devices varies depending on the MegaRAID
product. Check the LSI web site (http://www.lsi.com) for
specific details about your product.
•
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
SAS Array Limitations
This section describes the array limitations of the MegaRAID 1078-based
SAS RAID controllers. These include limitations such as the number of
physical disks supported, the maximum number of disks per controller,
and the maximum number of virtual disks allowed per controller.
1-10
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
Table 1.1 lists the array limitations for the 1078-based SAS RAID
controllers.
Table 1.1
SAS RAID Controller Array Limitations
Specification
SAS 8704ELP SAS 8708ELP SAS 8708EM2 SAS 8880EM2 SAS 8888ELP
RAID Controller RAID Controller RAID Controller RAID Controller RAID Controller
Maximum virtual
disks per
controller
64
64
64
64
64
Maximum arrays
per controller
8
16
16
128
128
Maximum virtual
disks per array
16
16
16
16
16
Maximum
physical devices
per array
8
16
16
32
32
Maximum
physical devices
per controller
8
16
16
240
240
Maximum hot
spares per
controller
8
16
16
240
240
Maximum spans
per virtual disk
4
8
8
8
8
Maximum
enclosures per
port*
3
3
3
16
16
Maximum ports
1
2
2
2
2**
* - Assumes one Storage Enclosure Processor (SEP) per enclosure.
** - Although the MegaRAID SAS 8888ELP RAID controller has two
internal and two external ports, only two ports can be used at one time.
The maximum numbers in Table 1.1 depend on how many physical
devices you have connected to the RAID controller. For example, the
maximum number of arrays is equal to the number of physical disks
supported by the controller, up to a limit of 128 arrays per controller.
Thus, for the SAS 8704ELP RAID controller, the maximum number of
arrays per controller, eight, is based on the maximum number of physical
devices that can be connected. The SAS 8704ELP RAID controller
Summary of SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
1-11
supports up to 240 physical disks, but the maximum number of arrays is
limited to 128.
In addition, though you can have up to eight virtual disks per array, and
up to 16 arrays per controller for the SAS 8704ELP, there is a limit of 64
virtual disks per controller. Because of this constraint, the 16 arrays
cannot all contain eight virtual disks at the same time.
Note:
The maximum number of hot spares per controller is equal
to the maximum number of drives per controller.
These RAID controllers support 64-bit logical block addressing (LBA),
which makes it possible to connect a large number of drives to the RAID
controller, directly and through expanders. However, the actual number
of drives that you can attach depends on the limits listed in Table 1.1
rather than by actual RAID volume capacity.
1.6.3
SATA II Features
The following list describes the SATA II features of the RAID controllers:
1.6.4
•
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
PCI Express Performance
The following list describes the PCI Express performance features of the
RAID controllers:
•
1-12
Provides a PCI Express interface that:
–
Supports a dedicated PCI Express bus
–
Supports x4, x8, or x16 lane configuration
–
Supports transfer rates of up to 2.5 Gbits/s per lane
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
–
1.6.5
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
Usability Features
The following list describes the usability features of the RAID controllers:
1.6.6
•
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
•
Supports the internal SAS Sideband signal SFF-8485 (SGPIO)
interface
Flexibility Features
These features increase the flexibility of the RAID controllers:
•
Supports a Flash ROM interface, a nonvolatile static RAM
(NVSRAM) interface, and a pipelined synchronous burst SRAM
(PSBRAM) interface
•
Offers a flexible programming interface to tune I/O performance
•
Allows mixed 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
•
Allows programming of the World Wide Name
Summary of SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
1-13
1.6.7
Drive Roaming
Drive roaming occurs when the physical disks 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.
Note:
In a clustering environment, drive roaming is supported
within the same channel only.
Configuration data is saved in both the NVRAM on the RAID controller
and on the hard drives attached to the controller. This action 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.
Turn off all power to the server and all hard drives, enclosures,
and system components. Disconnect the power cords from
the system.
Step 2.
Open the host system by following the instructions in the host
system technical documentation.
Step 3.
Move the drives to different positions on the backplane to
change the targets.
Step 4.
Determine the SAS target requirements.
Step 5.
Perform a safety check.
a. Make sure that the drives are inserted correctly.
b.
Close the cabinet of the host system.
Step 6.
Reconnect the power cords to the system.
Step 7.
Turn on the power to the system.
The controller then detects the RAID configuration from the
configuration data on the drives.
1-14
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
1.6.8
Drive 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 of 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.
Turn off all power to the server and all hard drives, enclosures,
and system components. Disconnect the power cords from
the systems.
Step 3.
Open the host system by following the instructions in the host
system technical documentation.
Step 4.
Either remove the SAS cable connectors from the internal
drives, or remove the shielded cables from the external drives
that you want to migrate.
a. Make sure that pin 1 on the cable matches pin 1 on the
connector.
b.
Step 5.
Make sure that the SAS cables conform to all SAS
specifications.
Remove the hard drives from the first system, and insert them
into drive bays on the second system.
Summary of SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
1-15
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 that all of the cables are attached correctly.
Step 9.
b.
Make sure that the RAID controller is installed correctly.
c.
Close the cabinet of the host system.
Reconnect the power cords to the system.
Step 10. Turn on the power to the system.
The controller detects the RAID configuration from the
configuration data on the drives.
1.7
Hardware Specifications
You can install the MegaRAID 1078-based SAS RAID controllers in a
computer with a mainboard that has a PCI Express slot. Table 1.2
describes the hardware configuration features for the MegaRAID 1078based SAS RAID controllers.
Table 1.2
MegaRAID 1078-based SAS RAID Controller
Comparisons
Specification
RAID levels
Devices supported
per port
Number of ports
1-16
MegaRAID SAS 8704ELP, MegaRAID SAS 8708ELP,
MegaRAID SAS 8708EM2, and MegaRAID SAS
8880EM2, and MegaRAID SAS 8888ELP RAID
Controllers
0, 1, 5, 6, 10, 50, and 60
Up to 15 SAS or SATA II devices (such as hard drives
and expanders)
• MegaRAID SAS 8704ELP RAID controller – Four
internal
• MegaRAID SAS 8708ELP RAID controller – Eight
internal
• MegaRAID SAS 8708EM2 RAID controller – Eight
internal
• MegaRAID SAS 8880EM2 RAID controller – Eight
external
• MegaRAID SAS 8888ELP RAID controller – Eight
internal, eight external
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
Table 1.2
MegaRAID 1078-based SAS RAID Controller
Comparisons (Cont.)
Specification
MegaRAID SAS 8704ELP, MegaRAID SAS 8708ELP,
MegaRAID SAS 8708EM2, and MegaRAID SAS
8880EM2, and MegaRAID SAS 8888ELP RAID
Controllers
Data transfer rate
Bus
Cache function
Up to 3 Gbits/s per PHY
PCI Express 1.0a
Write-back, write-through, adaptive read ahead,
non-read ahead, read ahead, cache I/O, direct I/O
Multiple virtual disks or Up to 40 virtual disks per controller or per logical array
arrays per controller
(this value is dependent on the firmware)
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 SAS 8880EM2 – Two (x4 SAS Port)
connectors
SFF-8088 Mini SAS 4x connectors
MegaRAID SAS 8888ELP – Two (x4 SAS Port)
SFF-8088 Mini SAS 4x connectors
Number of internal
• MegaRAID SAS 8704ELP RAID controller – One (x4
connectors
SAS Port) Mini SAS 4i connector
• MegaRAID SAS 8708ELP RAID controller – Two (x4
SAS Port) Mini SAS 4i connectors
• MegaRAID SAS 8708EM2 RAID controller – Two (x4
SAS Port) SFF-8087 Mini SAS 4i connectors
• MegaRAID SAS 8888ELP RAID controller – Two (x4
SAS Port) SFF-8087 Mini SAS 4i connectors
Hardware exclusive
Yes
OR (XOR) assistance
Direct I/O
Yes
Architecture
Fusion-MPT
Hardware Specifications
Copyright © 2007 by LSI Corporation. All rights reserved.
1-17
1.8
Technical Support
For assistance installing, configuring, or running your MegaRAID 1078based SAS RAID controller, contact LSI Technical Support:
Phone Support:
1-800-633-4545 (North America)
Web Site:
http://www.lsi.com/support/technical_support/index.html
1-18
Overview
Copyright © 2007 by LSI Corporation. All rights reserved.
Chapter 2
MegaRAID SAS
Hardware Installation
This chapter describes the procedures used to install the
MegaRAID 1078-based Serial Attached SCSI/Serial ATA II
RAID controllers with internal and external connectors. It consists of the
following sections:
2.1
•
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
LSIiTBBU03”
•
Section 2.6, “After Installing the RAID Controller”
Requirements
The following items are required to install a MegaRAID SAS 1078-based
RAID controller:
•
A MegaRAID SAS 87xx or 88xx RAID controller
•
A host system with an available PCI Express slot
•
The MegaRAID Universal Software Suite CD, which contains the
drivers and documentation
•
The necessary internal cables, external cables, or both
•
SAS physical disks or SATA II physical disks
Note:
LSI strongly recommends using an uninterruptible power
supply (UPS).
MegaRAID 1078-based SAS RAID Controllers User’s Guide
Copyright © 2007 by LSI Corporation. All rights reserved.
2-1
2.2
Quick Installation
The following steps are for quick MegaRAID SAS RAID controller
installation. These steps are for experienced computer users or installers.
Section 2.3, “Detailed Installation,” contains the steps for all others to
follow.
Step 1.
Turn off the power to the system, all physical disks, enclosures,
and system components, and disconnect the PC power cord.
Step 2.
Open the cabinet of the host system by following the
instructions in the host system technical documentation.
Step 3.
Check the jumper settings and the memory module to make
sure that they are in the desired position. The jumpers are set
at the factory, and you usually do not need to change them.
Note:
See Chapter 3, “MegaRAID SAS RAID Controller
Characteristics” for detailed information about the jumpers
and the connectors.
Step 4.
Install the MegaRAID SAS RAID controller in the server, and
connect SAS or SATA II devices to it. Make sure that the cables
you use conform to all specifications.
Step 5.
Perform a safety check.
a. Make sure that all cables are attached correctly.
2-2
b.
Make sure that the MegaRAID SAS RAID controller is
installed correctly.
c.
Close the cabinet of the host system
Step 6.
Reconnect the power cords to the system.
Step 7.
Turn on the power to the system.
MegaRAID SAS Hardware Installation
Copyright © 2007 by LSI Corporation. All rights reserved.
2.3
Detailed Installation
This section provides detailed instructions for installing a MegaRAID SAS
RAID controller.
Step 1.
Unpack the RAID Controller
Unpack and remove the MegaRAID SAS RAID controller.
Inspect it for damage. If it appears damaged, or if any of the
following items are missing, contact your LSI support
representative. The MegaRAID SAS RAID controller is shipped
with the following items:
Step 2.
–
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
Turn off the Power to the System
Turn off the power to the computer, and disconnect the AC
power cord. Remove the computer cover. Refer to the system
documentation for instructions. Before you install the controller,
make sure that the computer is disconnected from the power
and from any networks.
Step 3.
Review the MegaRAID Controller Jumpers and Controllers
The jumpers are set at the factory, and you usually do not need
to change them. See Chapter 3, “MegaRAID SAS RAID
Controller Characteristics” for diagrams of the MegaRAID SAS
RAID controllers with their jumpers and connectors.
Step 4.
Check the Memory Module
Make sure that the memory module is present and seated
firmly in the dual-inline memory module (DIMM) socket.
Note:
The SAS 8704ELP, SAS 8708ELP, SAS 8708EM2, and
SAS 8880EM2 RAID controllers have on-board DDR2
memory. The SAS 8888ELP RAID controller has a miniDIMM socket for memory.
Detailed Installation
Copyright © 2007 by LSI Corporation. All rights reserved.
2-3
Step 5.
Install the MegaRAID SAS RAID Controller
Select a PCI Express slot, and align the controller’s PCI
Express bus connector to the slot. Press down gently, but firmly,
to make sure that the card is seated correctly in the slot. Secure
the bracket to the computer chassis with the bracket screw.
Figure 2.1 shows the installation of a MegaRAID SAS PCIExpress RAID controller in a PCI Express slot.
Figure 2.1
Step 6.
Example of the MegaRAID SAS 8708ELP Board
Installation in a PCI Express Slot
Configure and Install the SAS Devices, SATA II Devices, or
Both in the Host Computer Case
Refer to the documentation for the devices for any
preinstallation configuration requirements.
2-4
MegaRAID SAS Hardware Installation
Copyright © 2007 by LSI Corporation. All rights reserved.
Step 7.
Connect the RAID Controller to the Devices
Use SAS cables to connect SAS devices, SATA II devices, or
both to the MegaRAID SAS RAID controller. See Section 2.4,
“SAS Device Cables” for SAS cable information. See
Section 2.4.1, “Connecting the SAS RAID Controller with
External Connectors to Drive Boxes and Drive Enclosures,” on
page 2-9 for details on connecting the controller to physical
disks and expanders.
The maximum cable length is 6 meters (236.22 in.). 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, use
the following guidelines:
a. Use cables no longer than 6 meters (236.22 in.) (LSI
recommends using shorter cables, if possible).
Step 8.
b.
Use cables that meet the SAS specification.
c.
Route the SAS cables carefully.
Turn on the Power to the System
Reinstall the computer cover, and reconnect the AC power
cords. Turn power on to the host computer. Make sure that the
power is turned on to the SAS devices, SATA II devices, or both
before or at the same time that the power is turned on to the
host computer. If the computer is powered up before these
devices, the devices 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 SAS RAID controller
number, firmware version, and cache SDRAM size. The
numbering of the controllers follows the PCI slot scanning order
used by the host mainboard.
Step 9.
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, immediately
press CTRL+H to run the utility.
Detailed Installation
Copyright © 2007 by LSI Corporation. All rights reserved.
2-5
Step 10. Install the Operating System Driver
The SAS RAID controllers can operate under various operating
systems. To operate under these operating systems, you must
install the software drivers. The MegaRAID Universal Software
Suite CD includes software drivers for the supported operating
systems, along with documentation. You can view the
supported operating systems and download the latest drivers
for RAID adapters on the LSI web site at:
http://www.lsi.com/cm/DownloadSearch.do.
For details on installing the driver, refer to the MegaRAID SAS
Device Driver Installation User’s Guide on the MegaRAID
Universal Software Suite 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.
2.4
SAS Device Cables
This section describes the cables used on the SAS controllers and
provides step-by-step instructions for connecting SAS physical disks,
SATA II physical disks, or both to the SAS RAID controller. The SAS and
SATA II protocols use a thin, 7-wire connector instead of the 68-wire
SCSI cable or 40-wire ATA cable.
Note:
Use only straight SAS cables, not crossover SAS cables.
Figure 2.2 displays the SAS cable that connects the internal connectors
on a SAS RAID controller to SAS drives.
2-6
MegaRAID SAS Hardware Installation
Copyright © 2007 by LSI Corporation. All rights reserved.
Figure 2.2
Internal SAS Cable for Connection to SAS Physical
Disks, SATA II Physical Disks, or Both
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 that connects a
SAS RAID controller with internal connectors to the host receptable
connector 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
SAS Device Cables
Copyright © 2007 by LSI Corporation. All rights reserved.
2-7
Figure 2.4 shows SAS and SATA II connectors on SAS and SATA II
physical disks, respectively. Cables connect internal connectors on the
RAID controllers to connectors on SAS drives, SATA II drives, or both.
Both SAS and/or 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:
Figure 2.4
SAS backplane connectors can accept SAS or SATA II
physical disks, but SATA II backplane connectors cannot
accept SAS drives.
SAS and SATA II Plugs and SAS Backplane Receptacle
Connector
SAS Primary
Physical Link
Serial Attached SCSI
Power
SAS Backplane
Receptacle Connector
SAS Secondary
Physical Link
Power
Serial ATA
Power
SATA II
Physical Link
SAS Secondary
Physical Link
SATA II/SAS
Primary
Physical Link
Note: SATA II backplane connectors
do not accept SAS drives.
The following subsections provide step-by-step instructions for
connecting the SAS RAID controllers to SAS physical disks and SATA II
physical disks, either directly or through an expander. Figure 2.5 through
Figure 2.6 show the MegaRAID SAS 8408E RAID controller and the
MegaRAID SAS 8480E RAID controller connected to physical disks and
to expanders, which then connect to physical disks.
2-8
MegaRAID SAS Hardware Installation
Copyright © 2007 by LSI Corporation. All rights reserved.
2.4.1
Connecting the SAS RAID Controller with External Connectors to
Drive Boxes and Drive Enclosures
Figure 2.5 shows how to connect the external SAS cable from the SAS
RAID controller that has external connectors to drive boxes or drive
enclosures.
Follow these steps to connect a SAS RAID controller with external
connectors to a drive box or a drive enclosure.
Step 1.
Connect the 4-lane external PCB receptacle plug on the
external cable to the external connector on your SAS RAID
controller.
Step 2.
Connect the plug on the other end of the SAS cable to the
connector on the drive box or the drive enclosure.
Figure 2.5
Connecting the SAS 8888E RAID Controller with
External Connectors to a Drive Box or Drive Enclosure
SAS Device Cables
Copyright © 2007 by LSI Corporation. All rights reserved.
2-9
2.4.2
Connecting the SAS RAID Controller with Internal Connectors to
Physical Disks
Figure 2.6 shows how to connect the internal SAS cable from internal
connectors on the SAS 8708ELP RAID controller to SAS and SATA II
drives.
Follow these steps to connect a SAS RAID controller with internal
connectors directly to SAS physical disks, SATA II physical disks, or both.
Step 1.
Plug the connector on the internal cable into the internal
connector on the SAS RAID controller.
Step 2.
Plug the connector on the other end of the internal cable into
the connector on the SAS physical disk or the SATA II physical
disk.
Step 3.
If you have another physical disk, connect it to another plug on
the internal cable.
You can connect other devices if the cable has more
connectors.
2-10
MegaRAID SAS Hardware Installation
Copyright © 2007 by LSI Corporation. All rights reserved.
Figure 2.6
Connecting a SAS 8708ELP RAID Controller with
Internal Connectors to Physical Disks
SAS Device Cables
Copyright © 2007 by LSI Corporation. All rights reserved.
2-11
2.5
Replacing a Failed Controller Containing Data in the
LSIiTBBU03
The MegaRAID intelligent Transportable Battery Backup Module 03
(LSIiTBBU03) 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 SAS RAID controller itself
failing, then the LSIiTBBU03 can be moved to a new controller and the
data can be recovered. The replacement controller must have a
cleared configuration.
Follow these steps to replace a failed controller with data in the
transportable battery backup unit.
Step 1.
Turn off the power to the system and to the drives.
Step 2.
Remove the failed controller from the system.
Step 3.
Remove the LSIiTBBU03 from the failed controller.
Step 4.
Insert the LSIiTBBU03 into the replacement controller.
Step 5.
Insert the replacement controller into the system.
Step 6.
Turn off the power to the system and to the drives.
The controller then reads the disk configuration into NVRAM
and flushes cache data to the virtual disks.
Note:
2.6
Refer to the MegaRAID 1078 Battery Backup Unit User’s
Guide for installation instructions for the LSIiTBBU03.
After Installing the RAID Controller
After MegaRAID SAS RAID controller installation, you must configure the
MegaRAID SAS RAID controller and install the operating system driver.
The MegaRAID SAS Software User’s Guide instructs you on the
configuration options and how to set them on your MegaRAID SAS RAID
controller. The MegaRAID SAS Device Driver Installation User’s Guide
provides detailed installation instructions for operating system drivers.
2-12
MegaRAID SAS Hardware Installation
Copyright © 2007 by LSI Corporation. All rights reserved.
Chapter 3
MegaRAID SAS RAID
Controller Characteristics
This chapter describes the characteristics of the LSI MegaRAID Serial
Attached SCSI/Serial ATA II 1078-based RAID controllers. It consists of
the following sections:
3.1
•
Section 3.1, “MegaRAID 1078-based SAS RAID Controller Family”
•
Section 3.2, “MegaRAID SAS 1078-based RAID Controller
Characteristics”
•
Section 3.3, “Technical Specifications”
MegaRAID 1078-based SAS RAID Controller Family
The MegaRAID 1078-based SAS RAID controllers are dual PHY, SAS
PCI Express RAID controllers and are 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 SAS RAID controllers.
3.1.1
MegaRAID SAS 8704ELP/8708ELP RAID Controllers
The MegaRAID SAS 8704ELP PCI Express Low-Profile Disk Array RAID
Controller controls four internal SAS/SATA ports through one (x4 SAS
Port) SFF-8087 Mini SAS 4i internal connector.
The MegaRAID SAS 8708ELP PCI Express Low-Profile Disk Array RAID
Controller controls eight internal SAS/SATA ports through two (x4 SAS
Port) SFF-8087 Mini SAS 4i internal connectors.
MegaRAID 1078-based SAS RAID Controllers User’s Guide
Copyright © 2007 by LSI Corporation. All rights reserved.
3-1
Note:
The only difference between the SAS 8704ELP RAID
controller and the SAS 8708ELP RAID controller is that the
SAS 8704ELP does not contain the J9 connector, which
supports ports 4–7.
This subsection provides the board layout, and connector and jumper
information for the SAS RAID controller. Figure 3.1 shows the jumpers
and connectors on the SAS 8708ELP RAID controller, and Table 3.1
describes them.
Figure 3.1
3-2
Card Layout for the MegaRAID SAS 8708ELP RAID
Controller
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
Table 3.1
SAS 8708ELP RAID Controller – Jumpers and
Connectors
Jumper Type
Description
J1
2-pin connector.
Cache Write Pending
LEDx
Connector for the enclosure LED. Provides
a signal that indicates when the on-board
cache contains data and a write from the
cache to the hard drives is pending.
Optional.
J2
On-board BIOS Enable
2-pin shielded header.
The optional BIOS function is enabled or
disabled in software depending on the
status of this jumper.
No jumper: BIOS is enabled (default).
Jumper: BIOS is disabled.
J3
J5
Universal Asynchronous
Receiver/Transmitter
(UART) debugging
4-pin connector.
Individual Fault LED
header for eight ports
16-pin connector.
Reserved for LSI use.
Indicates hard drive faults. There is one LED
per port. When lit, each LED indicates the
corresponding hard drive has failed or is in
the Unconfigured-Bad state. Refer to the
MegaRAID SAS Software User’s Guide for
more information about drive states.
Note: The LEDs function in a direct-attach
configuration (there are no SAS
expanders). Direct attach is defined as
a maximum of one hard drive connected directly to each port. See
Figure 2.6 for an example.
J6
J7
IPMI-style SMBus
(System Management)/I2C header
3-pin shielded header.
Provides enclosure management support.
Board-to-board connector 20-pin connector.
for battery backup unit
daughter card
Provides the interface to the daughter card
that contains the battery backup unit.
MegaRAID 1078-based SAS RAID Controller Family
Copyright © 2007 by LSI Corporation. All rights reserved.
3-3
Jumper Type
Description
J8
x4 SAS Ports 0–3
The x4 SAS connectors connect the cables
from the adapter to SAS or SATA II physical
drives, or to a SAS expander
J9
x4 SAS Ports 4–7
J10
Default Boot Strap
Controller
The x4 SAS connectors connect the cables
from the adapter to SAS or SATA II physical
Note: The SAS 8704ELP drives, or to a SAS expander
does not support
the J9 connector.
2-pin connector.
Loads the defaults in case the boot strap
controller (the serial ROM that controls the
memory and processor speeds) becomes
corrupt.
3.1.2
MegaRAID SAS 8708EM2 RAID Controllers
The MegaRAID SAS 8708EM2 PCI Express Disk Array RAID Controller
controls eight internal SAS/SATA ports through two (x4 SAS Port)
SFF-8087 Mini SAS 4i internal connectors.
This subsection provides the board layout, and connector and jumper
information for the SAS 8708ELP RAID controller. Figure 3.1 shows the
jumpers and connectors on the RAID controller, and Table 3.1 describes
them.
3-4
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
Figure 3.2
Card Layout for the MegaRAID SAS 8708EM2 RAID
Controller
J1
J7
J4
J2 J3
J6
J12
J8
Port
7-4
J5
J9
Port
3-0
J10
85020-00
Table 3.2
SAS 8708EM2 RAID Controller – Jumpers and
Connectors
Jumper Type
Description
J1
16-pin connector.
Individual Fault LED
header for eight ports
Indicates hard drive faults. There is one LED
per port. When lit, each LED indicates the
corresponding hard drive has failed or is in
the Unconfigured-Bad state. Refer to the
MegaRAID SAS Software User’s Guide for
more information about drive states.
The LEDs function in a direct-attach
configuration (there are no SAS expanders).
Direct attach is defined as a maximum of
one hard drive connected directly to each
port.
J2
Cache Write Pending
LED
2-pin connector.
The connector for the enclosure LED. It
provides a signal that indicates when the
on-board cache contains data and a write
from the cache to the hard drives is
pending. Optional.
MegaRAID 1078-based SAS RAID Controller Family
Copyright © 2007 by LSI Corporation. All rights reserved.
3-5
Jumper Type
J3
Description
Combined Activity header 2-pin connector.
Provides an LED interface that indicates
activity on individual drives attached to the
card.
J4
BRK Debug connector
2-pin connector.
Reserved for LSI use.
J5
J6
Universal Asynchronous
Receiver/Transmitter
(UART) debugging
4-pin connector.
Mode Select header
2-pin header.
Reserved for LSI use.
Reserved for LSI use.
IPMI-style SMBus
(System Management)/I2C header
3-pin shielded header.
J8
x8 SAS Ports 4–7
The x4 SAS connectors connect the cables
from the RAID controller to SAS or SATA II
physical drives or to a SAS expander.
J9
x8 SAS Ports 0–3
The x4 SAS connectors connect the cables
from the RAID controller to SAS or SATA II
physical drives or to a SAS expander.
J7
3-6
Provides enclosure management support.
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
3.1.3
MegaRAID SAS 8880EM2 RAID Controller
The MegaRAID SAS 8880EM2 PCI Express Disk Array RAID Controller
has one I/O processor. This processor controls eight ports through two
(x4 SAS Port) SFF-8088 Mini SAS 4x external connectors. You can
configure the connectors through a SAS mux.
This subsection provides the board layout, and connector and jumper
information for the SAS 8880EM2 RAID controller, which has eight
external SAS or SATA port connectors. Figure 3.4 shows the jumpers
and connectors on the controller, and Table 3.4 describes them.
Figure 3.3
Card Layout for the MegaRAID SAS 8880EM2 RAID
Controller
J13 J7
J6
J2
J21
J5
J23
J20
J1
85021-00
MegaRAID 1078-based SAS RAID Controller Family
Copyright © 2007 by LSI Corporation. All rights reserved.
3-7
Table 3.3
SAS 8880EM2 RAID Controller – Jumpers and
Connectors
Jumper Type
Description
J1
20-pin connector
Battery Backup
Connector
Provides the interface to the battery
backup unit. The SAS 8880EM2 RAID
controller connects directly to the
LSIiBBU07.
J2
J5
Universal Asynchronous
Receiver/Transmitter
debugging
BIOS Disable
4-pin connector
Reserved for LSI use.
Note: This connector uses 3.3V LVTTL
levels and will be damaged if connected
to standard transceiver levels.
2-pin connector
Reserved for LSI use.
J6
Board Default Debug
2-pin connector
Reserved for LSI use (default jumper).
J7
Cache Write Pending
LED
2-pin connector
The connector for the enclosure LED. It
provides a signal that indicates when the
on-board cache contains data and a
write from the cache to the hard drives is
pending. Optional.
J13
Global Drive Activity
header
2-pin connector
Indicates activity on the physical drives.
Operates at approximately 10mA at 3.3V.
3-8
J20
x4 SAS PORT B (Lanes
0-3)
The x4 SAS connectors connect the
cables from the RAID controller to SAS
or SATA II physical drives or to a SAS
expander.
J21
x4 SAS PORT A (Lanes
4-7)
The x4 SAS connectors connect the
cables from the RAID controller to SAS
or SATA II physical drives or to a SAS
expander.
J23
Debug connector
Reserved for LSI use.
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
3.1.4
MegaRAID SAS 8888ELP RAID Controller
The MegaRAID SAS 8888ELP PCI Express Low-Profile Disk Array RAID
Controller has one I/O processor. This processor controls eight ports
through two (x4 SAS Port) SFF-8088 Mini SAS 4x external connectors
and two (x4 SAS Port) SFF-8087 Mini SAS 4i internal connectors. You
can configure the connectors through a SAS mux.
This subsection provides the board layout, and connector and jumper
information for the SAS 8888ELP RAID controller, which has eight
internal and eight external SAS or SATA port connectors. Figure 3.4
shows the jumpers and connectors on the controller, and Table 3.4
describes them.
Figure 3.4
Card Layout for the MegaRAID SAS 8888ELP RAID
Controller
MegaRAID 1078-based SAS RAID Controller Family
Copyright © 2007 by LSI Corporation. All rights reserved.
3-9
Table 3.4
SAS 8888ELP RAID Controller – Jumpers and
Connectors
Jumper Type
Description
J1
4-pin jumper.
Serial header for debug
use
Reserved for LSI use.
J2
J3
IPMI-style SMBus
(System Management)
/I2C header
3-pin (shielded) header.
MiniDIMM bracket
Holds the cache memory module.
Provides enclosure management
support.
The SAS 8888ELP RAID controller
supports the following battery-backed
cache configurations:
- 256 MB – 72b arrangement (3)
64Mx16, Double Data Rate II @ 667
MHz SDRAM intelligent transportable
battery-backed MiniDIMM module
- 512 MB – 72b arrangement (3)
128Mx16, Double Data Rate II @ 667
MHz SDRAM intelligent transportable
battery-backed MiniDIMM module
Using unapproved memory modules can
void your limited warranty.
J6
SAS 8888ELP Ports
Ports 4–7.
The ports connect the cables from the
adapter to SAS or SATA II physical
drives, or a port multiplier.
J7
SAS 8888ELP Ports
Ports 0–3.
The ports connect the cables from the
adapter to SAS or SATA II physical
drives, or a port multiplier.
3-10
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
Table 3.4
SAS 8888ELP RAID Controller – Jumpers and
Connectors
Jumper Type
Description
J8
2-pin connector.
Serial Bootstrap
EEPROM connector
Reserved for LSI use.
J9
Cache Write Pending
LED
2-pin connector.
Connector for an LED mounted on the
system enclosure. The LED indicates
that the data in the cache has yet to be
written to the storage devices.
J10
3.2
Battery Backup
20-pin connector.
Connector (located on the
rear of the connector)
Provides the interface to the remote
battery pack.
MegaRAID SAS 1078-based RAID Controller
Characteristics
Table 3.5 shows the general characteristics for all MegaRAID 1078based SAS RAID controllers.
Table 3.5
MegaRAID 1078-based SAS RAID Controller
Characteristics
Flash
ROM1
Serial
EEPROM2
SAS Data Transfers
SCSI Features
Yes
Yes
Up to 3 Gbits/s per port
Plug and Play
Scatter/Gather
Activity LED
1.
2.
SCSI
Termination
Active
For boot code and firmware.
For BIOS configuration storage.
Each MegaRAID 1078-based SAS RAID controller ensures data integrity
by intelligently validating the compatibility of the SAS domain. The
MegaRAID 1078-based SAS RAID controllers use Fusion-MPT
architecture, which allows for thinner drivers and better performance.
MegaRAID SAS 1078-based RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
3-11
3.3
Technical Specifications
The design and implementation of the MegaRAID 1078-based SAS RAID
controllers minimize electromagnetic emissions, susceptibility to radio
frequency energy, and the effects of electrostatic discharge. The
MegaRAID 1078-based SAS RAID controllers show the following marks
and certifications:
•
CE mark
•
C-Tick mark
•
FCC Self-Certification logo
•
Canadian Compliance Statement
•
Korean MIC
•
Taiwan BSMI
•
Japan VCCI
•
CISPR Class B
The following hardware is compliant with CSA C22.2 No. 60950-1, UL
60950-1 First Edition-listed accessory, UL file number E257743:
3-12
•
MegaRAID SAS 8704ELP RAID controller (model 01116)
•
MegaRAID SAS 8708ELP RAID controller (model 01116)
•
MegaRAID SAS 8708EM2 RAID controller (model 01144)
•
MegaRAID SAS 8880EM2 RAID controller (model 25039)
•
MegaRAID SAS 8888ELP RAID controller (model 01119)
•
LSIiBBU01 battery backup unit (model 01058)
•
LSIiBBU05 intelligent battery backup unit (model 01117)
•
LSIiBBU06 intelligent battery backup unit (model 29707)
•
LSIiBBU07 intelligent battery backup unit (model 31503)
•
LSIiTBBU03 intelligent transportable battery backup unit (model
01126)
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
3.3.1
RAID Controller Specifications
Table 3.6 lists the specifications for the MegaRAID 1078-based SAS
RAID controllers.
Table 3.6
RAID Controller Specifications
Specification
MegaRAID SAS 8704ELP, MegaRAID SAS 8708ELP,
MegaRAID SAS 8708EM2, MegaRAID SAS 8880EM2,
and MegaRAID SAS 8888ELP RAID Controllers
Processor
(PCI Express host
controller to PCI
secondary I/O
controller)
LSISAS1078 ROC device with Integrated PowerPC
processor
Part number
•
•
•
•
•
•
•
•
•
•
Operating voltage
+3.3 V, +12 V
Card size
• SAS 8704ELP RAID controller: Low-profile PCI
Express adapter card size (167.64 mm x 68.91 mm)
• SAS 8708ELP RAID controller: Low-profile PCI
Express adapter card size (167.64 mm x 68.91 mm)
• SAS 8708EM2 RAID controller: Low-profile PCI
Express adapter card size (167.64 mm x 68.91 mm)
• SAS 8880EM2 RAID controller: Low-profile PCI
Express adapter card size (167.64 mm x 68.91 mm)
• SAS 8888ELP RAID controller: Extended Length Lowprofile PCI Express adapter card size (167.64 mm x
64.39 mm)
SAS 8704ELP RAID controller: 01116
SAS 8708ELP RAID controller: 01116
SAS 8708EM2 RAID controller: 01144
SAS 8880EM2 RAID controller: 25039
SAS 8888ELP RAID controller: 01119
LSIiBBU01 intelligent Battery Backup Unit 01: 01058
LSIiBBU05 intelligent Battery Backup Unit 05: 01117
LSIiBBU06 intelligent Battery Backup Unit 05: 29707
LSIiBBU07 intelligent Battery Backup Unit 05: 31503
LSIiTBBU03 intelligent Transportable Battery Backup
Unit 03: 01126
Array interface to the PCI Express Rev. 1.0a
host
Technical Specifications
Copyright © 2007 by LSI Corporation. All rights reserved.
3-13
Table 3.6
RAID Controller Specifications (Cont.)
Specification
3-14
MegaRAID SAS 8704ELP, MegaRAID SAS 8708ELP,
MegaRAID SAS 8708EM2, MegaRAID SAS 8880EM2,
and MegaRAID SAS 8888ELP RAID Controllers
PCI Express bus
data transfer rate
• Up to 2.5 Gbits/s per lane
• x4 lane width (SAS 8704ELP, SAS 8708EM2, and SAS
8708ELP RAID controllers
• x8 lane width (SAS 8880EM2 and SAS 8888ELP RAID
controller)
• Up to 2 Gbytes/s per direction for SAS 8888ELP x8
cards (4 Gbytes/s total)
Serial port
3-pin RS232-compatible connector (for manufacturing
use only)
SAS controller
One LSISAS1078 Single SAS controller
SAS bus speed
3 Gbits/s
SAS ports
SAS connectors with four SAS ports each
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
Table 3.6
RAID Controller Specifications (Cont.)
Specification
MegaRAID SAS 8704ELP, MegaRAID SAS 8708ELP,
MegaRAID SAS 8708EM2, MegaRAID SAS 8880EM2,
and MegaRAID SAS 8888ELP RAID Controllers
Cache configuration The SAS 8704ELP, SAS 8708ELP, and SAS 8880EM2
RAID controllers support the following battery-backed
cache configurations:
• 128 MB – 40b arrangement (3) 32Mx16, Double Data
Rate II @ 667 MHz battery-backed module
• 256 MB – 40b arrangement (3) 64Mx16, Double Data
Rate II @ 667 MHz battery-backed module
• 256 MB – 72b arrangement (5) 32Mx16, Double Data
Rate II @ 667 MHz battery-backed module
• 512 MB – 72b arrangement (5) 64Mx16, Double Data
Rate II @ 667 MHz battery-backed module
The SAS 8708EM2 RAID controller supports the following
battery-backed cache configurations:
• 128 MB – 40b arrangement (3) 32Mx16, Double Data
Rate II @ 667 MHz battery-backed module
• 256 MB – 40b arrangement (3) 64Mx16, Double Data
Rate II @ 667 MHz battery-backed module
The SAS 8888ELP RAID controller supports the following
battery-backed cache configurations:
• 256 MB – 72b arrangement (5) 64Mx16, Double Data
Rate II @ 667 MHz SDRAM intelligent transportable
battery-backed MiniDIMM module
• 512 MB – 72b arrangement (5) 128Mx16, Double Data
Rate II @ 667 MHz SDRAM intelligent transportable
battery-backed MiniDIMM module
Size of flash ROM
for firmware
4 Mbytes
Nonvolatile random
access memory
(NVRAM)
32 Kbytes for storing RAID configurations
Technical Specifications
Copyright © 2007 by LSI Corporation. All rights reserved.
3-15
3.3.2
Array Performance Features
Table 3.7 shows the array performance features for the MegaRAID 1078based SAS RAID controllers.
Table 3.7
Array Performance Features
Specification
MegaRAID SAS 8704ELP, MegaRAID
SAS 8708ELP, and MegaRAID SAS
8888ELP RAID Controllers
PCI Express host data transfer rate 2.5 Gbits/s per lane
3-16
Drive data transfer rate
3.0 Gbits/s per lane
Maximum scatters and 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 Kbytes, 16 Kbytes, 32 Kbytes, 64 Kbytes,
128 Kbytes, 256 Kbytes, 512 Kbytes, or 1
Mbyte
Maximum number of concurrent
commands
255
Support for multiple initiators
Yes
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
3.3.3
Fault Tolerance
Table 3.8 lists the fault tolerance features for the MegaRAID 1078-based
SAS RAID controllers.
Table 3.8
Fault Tolerance Features
Specification
MegaRAID SAS 8704ELP, MegaRAID SAS
8708ELP, MegaRAID SAS 8708EM2,
MegaRAID SAS 8880EM2, and MegaRAID
SAS 8888ELP
Support for SMART1
Yes
Optional battery backup for
cache memory
MegaRAID SAS 8704ELP RAID controller and
MegaRAID SAS 8708ELP RAID controller:
- LSIiBBU05 battery backup.
<3.6V/880mAH battery pack; up to 72
hours of data retention for 128 Mbytes
MegaRAID SAS 8708EM2 RAID controller:
- LSIiBBU06 battery backup.
<3.7V/790mAH battery pack; up to 72
hours of data retention for 256 Mbytes
MegaRAID SAS 8880EM2 RAID controller:
- LSIiBBU07 battery backup.
<3.7V/1350mAH battery pack; up to 72
hours of data retention for 512 Mbytes
MegaRAID SAS 8888ELP RAID controller:
- LSIiBBU01 battery backup.
<3.6V/880mAH battery pack; up to 72
hours of data retention for 128 Mbytes
- LSIiBBU05 battery backup.
<3.6V/880mAH battery pack; up to 72
hours of data retention for 128 Mbytes
- LSIiTBBU03 battery backup.
3.7V/1350mAH battery pack; up to 72
hours of data retention for 512 Mbytes
Drive failure detection
Automatic
Drive rebuild using hot spares
Automatic
Parity generation and checking
Yes
Technical Specifications
Copyright © 2007 by LSI Corporation. All rights reserved.
3-17
1.
3.3.4
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.
Electrical Characteristics
This subsection provides the power supply requirements for the
MegaRAID 1078-based SAS RAID controllers.
3.3.4.1
Power Supply Requirements for the SAS 8704ELP and SAS 8708ELP RAID
Controllers
All power is supplied to the SAS 8704ELP and the SAS 8708ELP RAID
controllers through the PCI Express 3.3V rails and the 12V rail. Onboard
switching regulator circuitry operating from the 3.3V rails and the 12V rail
provide the necessary voltages. The following states determine the
typical current consumption of the controller:
•
State 1: During a hard reset
•
State 2: During a disk stress test
•
State 3: While sitting idle at the DOS prompt
The supply voltages are 12V ± 8 percent (from PCI edge connector only)
and 3.3V ± - 9 percent (from PCI edge connector only). Table 3.9 lists
the power supply for the RAID controller for each of the three states at
the different voltages.
Table 3.9
PCI Edge Connector
State 1
State 2
State 3
3.3V supply
330mA
330mA
330mA
+12V supply
1.00A
1.81A
1.53A
3.3V auxiliary supply
30mA
30mA
30mA
Note:
3-18
Power Supply for the SAS 8704ELP and the SAS
8708ELP RAID Controllers
+12V is used in the charging circuitry for the battery pack
on the optional iBBU battery-backed daughter card. If the
BBU daughter card is mounted, the following power
consumption figures apply:
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
3.3.4.2
–
During trickle charging of the battery pack: N/A (no
trickle charge for Li-ION)
–
During fast charging of the battery pack: 230mA in +12V
current
Power Supply Requirements for the SAS 8708EM2 RAID Controller
All power is supplied to the SAS 8708EM2 RAID controller through the
PCI Express 3.3V rails and the 12V rail. Onboard switching regulator
circuitry operating from the 3.3V rails and the 12V rail provide the
necessary voltages. The following states determine the typical current
consumption of the controller:
•
State 1: During a hard reset
•
State 2: During a disk stress test
•
State 3: While sitting idle at the DOS prompt
The supply voltages are 12V ± 8 percent (from PCI edge connector only)
and 3.3V ± - 9 percent (from PCI edge connector only). Table 3.9 lists
the power supply for the RAID controller for each of the three states at
the different voltages.
Table 3.10
Power Supply for the SAS 8708EM2 RAID Controllers
PCI Edge Connector
State 1
State 2
State 3
3.3V supply
250mA
330mA
312mA
+12V supply
1.00A
1.15A
1.00A
3.3V auxiliary supply
30mA
30mA
30mA
Note:
+12V is used in the charging circuitry for the battery pack
on the optional iBBU battery-backed daughter card. If the
BBU daughter card is mounted, the following power
consumption figures apply:
–
During trickle charging of the battery pack: N/A (no
trickle charge for Li-ION)
–
During fast charging of the battery pack: 230mA in +12V
current
Technical Specifications
Copyright © 2007 by LSI Corporation. All rights reserved.
3-19
3.3.4.3
Power Supply Requirements for the SAS 8880EM2 RAID Controllers
All power is supplied to the SAS 8880EM2 RAID controller through the
PCI Express 3.3V rails and the 12V rail. Onboard switching regulator
circuitry operating from the 3.3V rails and the 12V rail provide the
necessary voltages. The following states determine the typical current
consumption of the controller:
•
State 1: During a hard reset
•
State 2: During a disk stress test
•
State 3: While sitting idle at the DOS prompt
The supply voltages are 12V ± 8 percent (from PCI edge connector only)
and 3.3V ± - 9 percent (from PCI edge connector only). Table 3.9 lists
the power supply for the RAID controller for each of the three states at
the different voltages.
Table 3.11
Power Supply for the SAS 8880EM2 RAID Controller
PCI Edge Connector
State 1
State 2
State 3
3.3V supply
330mA
330mA
330mA
+12V supply
1.00A
1.81A
1.53A
3.3V auxiliary supply
30mA
30mA
30mA
Note:
3.3.4.4
+12V is used in the charging circuitry for the battery pack
on the optional iBBU battery-backed daughter card. If the
BBU daughter card is mounted, the following power
consumption figures apply:
–
During trickle charging of the battery pack: N/A (no
trickle charge for Li-ION)
–
During fast charging of the battery pack: 230mA in +12V
current
Power Supply Requirements for the SAS 8888ELP RAID Controller
All power is supplied to the SAS 8888ELP RAID controller through the
PCI Express 3.3V rails and the 12V rail. Necessary voltages are provided
by onboard switching regulator circuitry operating from the 3.3V rails and
the 12V rail. The following states determine the typical current
consumption of the controller:
3-20
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
•
State 1: No BBU, eight SAS ports active
•
State 2: Eight SAS ports active, remote iBBU charging
•
State 3: Eight SAS ports active, both remote iBBU and iTBBU
charging
The supply voltages are 12V ± 8 percent (from the PCI edge connector
only) and 3.3V ± 9 percent (from PCI edge connector only). The 3.3V
auxiliary supply measurement is for the board powered down in the BBU
mode with an iTBBU installed. Table 3.12 lists the power supply for the
RAID controller for each of the three states at the different voltages.
Table 3.12
3.3.5
Power States for the SAS 8888ELP RAID Controller
PCI Edge Connector
State 1
State 2
State 3
3.3V supply
330mA
330mA
330mA
+12V supply
1.30A
1.50A
1.80A
3.3V auxiliary supply
20mA
20mA
20mA
Operating and Non-operating Conditions
For the MegaRAID 1078-based SAS RAID controllers, the operating
(thermal and atmospheric) conditions are:
•
Relative humidity range is 5 percent to 90 percent noncondensing
(20 percent to 80 percent noncondensing for the RAID controllers)
•
Airflow must be at least 200 linear feet per minute (LFPM) to avoid
operating the processor above the maximum ambient temperature
The parameters for the non-operating (such as storage and transit)
environment for the MegaRAID 1078-based SAS RAID controllers are:
3.3.6
•
Temperature range: −30° C to +80° C without the battery backup unit
•
Temperature range: 0° C to +45° C with the battery backup unit
Safety Characteristics
All MegaRAID 1078-based SAS RAID controllers meet or exceed 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. For the boards installed in a PCI Express bus slot, all voltages are
lower than the SELV 42.4V limit.
Technical Specifications
Copyright © 2007 by LSI Corporation. All rights reserved.
3-21
3-22
MegaRAID SAS RAID Controller Characteristics
Copyright © 2007 by LSI Corporation. All rights reserved.
Appendix A
Glossary of Terms
and Abbreviations
active
termination
The electrical connection required at each end of the SCSI bus,
composed of active voltage regulation and a set of termination resistors.
array
A group of disk drives that 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
A program that allows a microprocessor (through the operating system)
to direct the operation of a peripheral device.
domain
validation
A software procedure in which a host queries a device to determine its
ability to communicate at the negotiated data rate.
EEPROM
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.
external SAS
device
A SAS device installed outside the computer cabinet. These devices are
connected using specific types of shielded cables.
Fusion-MPT
architecture
An acronym for Fusion-Message Passing Technology architecture.
Fusion-MPT consists of several main elements: Fusion-MPT firmware,
the Fibre Channel and SCSI hardware, and the operating system level
MegaRAID 1078-based SAS RAID Controllers User’s Guide
Copyright © 2007 by LSI Corporation. All rights reserved.
A-1
drivers that support these 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 RAID controller is installed. It uses the
RAID controller to transfer information to and from devices attached to
the SCSI bus.
host adapter
board
A circuit board or integrated circuit that provides a device connection to
the computer system.
hot spare
An idle, powered on, standby drive that is ready for immediate use in
case of disk failure. A hot spare 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, 6, 10,
50, and 60; not RAID level 0), and the hot spare must have sufficient
capacity.
internal SAS
device
A SAS device installed inside the computer cabinet. These devices are
connected by using a shielded cable.
main memory
The part of computer memory that 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-2
Glossary of Terms and Abbreviations
Copyright © 2007 by LSI Corporation. All rights reserved.
a unifying I/O architecture for various systems: desktops, workstations,
mobile, server, communications, and embedded devices.
peripheral
devices
A piece of hardware (such as a video monitor, disk drive, printer, or
CD-ROM) used with a computer and under the control of the computer.
SCSI peripherals are controlled through a SAS MegaRAID SAS RAID
controller (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, performance,
or both 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, 6, 10, 50, and 60) provide data protection.
RAID levels
A set of techniques applied to disk groups to deliver higher data
availability, performance characteristics, or both 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. SAS controllers leverage
a common electrical and physical connection interface that is compatible
with Serial ATA. The SAS controllers support 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
A-3
Copyright © 2007 by LSI Corporation. All rights reserved.
server and high-end workstation environments. Each port on the SAS
RAID controller supports SAS devices, SATA II devices, or both.
SAS device
Any device that conforms to the SAS standard and is attached to the
SAS bus by a SAS cable. This includes SAS RAID controllers
(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, 128 Kbytes,
256 Kbytes, 512 Kbytes, or 1 Mbyte 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 that is 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 © 2007 by LSI Corporation. All rights reserved.
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