Avago Technologies RAID 170LP User Manual

AcceleRAID 170LP

Installation Guide

DB11-000024-00 First Edition
08P5513

Electromagnetic Compatibility Notices

This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference
that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or
more of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and the receiver.

•Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.

•Consult the dealer or an experienced radio/TV technician for help.
Shielded cables for SCSI connection external to the cabinet are used in the

compliance testing of this Product. LSI Logic is not responsible for any radio
or television interference caused by unauthorized modification of this
equipment or the substitution or attachment of connecting cables and
equipment other than those specified by LSI Logic. The correction of
interferences caused by such unauthorized modification, substitution, or
attachment will be the responsibility of the user.

The LSI Logic Mylex AcceleRAID 170LP is tested to comply with FCC
standards for home or office use.

This Class B digital apparatus meets all requirements of the Canadian

Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du

Règlement sur le matériel brouilleur du Canada.

This is a Class B product based on the standard of the Voluntary Control
Council for Interference from Information Technology Equipment (VCCI).
If this is used near a radio or television receiv er in a domestic en vironment, it
may cause radio interference. Install and use the equipment according to the
instruction manual.

LSI Logic Corporation
North American Headquarters
Milpitas, CA

408.433.8000

Declaration of Conformity

Per FCC Part 2, Section 2.1077(a)

Manufacturer’s Name: LSI Logic Corporation
Manufacturer’s Address:

Declares that the product:
Product Name: AcceleRAID 170LP PCI to Ultra 160 SCSI

Model Number(s): A170LP-1-16NB

Year of Manufacture: 2000
Conforms to the following Product Specification(s):

FCC: CFR 47 Part 15, Subpart B, Section 15.107(e)

Supplementary Information:

This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.

North American Headquarters
Milpitas, CA

USA

RAID Controller

and Section 15.109(g) Class B Digital Device
tested per ANSI C63.4–1992 procedures

Declaration of Conformity

Per 89\336\EEC

Responsible Party
Name:
Address:

Trade Name: AcceleRAID 170LP PCI to Ultra 160 SCSI RAID

Model Number(s):A170LP-1-16NB

Standards: EN 50081-1:1992, Emissions

LSI Logic Corporation
North American Headquarters
Milpitas, CA

U.S.A.

hereby declares that the product

Controller
Fab 550167-01 Rev A

conforms to the following specifications

EN 55022:1998 Class B ITE radiated and conducted
emissions

EN 50024:1998, Immunity

EN 61000-4-2:1998 Electrostatic Discharge
EN 61000-4-3:1998 Radiated Immunity
EN 61000-4-4:1995 Electrical Fast Transients/Burst
EN 61000-4-5:1995 Surges
EN 61000-4-6:1996 Conducted Immunity
EN 61000-4-11:1994 Supply Dips and Variations

Community of Europe

CE mark is rated for the AceleRAID 170LP as follows:
CISPR 22 Radiated Emission
EN55022, Generic immunity standard for the following:

IEC 801-2 ESD, IEC 801-3 Radiated, and IEC 801-4 EFT/Burst
Warning!
This is a Class B product. In a residential environment this product may

cause radio interference, in which case the user may be required to take
adequate measures.

Achtung!
Dieses ist ein Gerät der Funkstörgrenzwertklasse B. In Wohnbereichen

können bei Betrieb dieses Gerätes Rundfunkstörungen aufreten, in welchen
Fällen der Benutzer für entsprechende Gegenmaßnahmen verantwortlich ist.

Avertissement!
Cet appareil est un appareil de Classe B. Dans un environnement résidentiel

cet appareil peut provoquer des brouillages radioélectriques. Dans ce cas, il
peut être demandé à l’utilisateur de prendre des mésures appropriées.

Underwriters Laboratories Statement and
Warning

Proprietary Rights Notice

This document contains proprietary information of LSI Logic
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 Logic Corporation. Any product(s) described
herein is/are a licensed product of LSI Logic Corporation.

Document Description

Document DB11-000024-00 First Edition. November 2002
This document describes the LSI Logic Corporation’s Mylex
AcceleRAID 170LP product for Software Kit 5.20 and will remain
the official reference source for all revisions/releases of this product
until rescinded by an update.

Disclaimer

It is the policy of LSI Logic to improve products as new technology ,
components, software, and firmware become available. LSI Logic
Corporation reserves the right to make changes to any products
herein at any time without notice. All features, functions, and
operations described herein may not be marketed by LSI Logic in
all parts of the world. In some instances, photographs and figures
are of equipment prototypes. Therefore, before using this
document, consult your LSI Logic representative for information
that is applicable and current. LSI LOGIC DOES NOT ASSUME
ANY RESPONSIBILITY OR LIABILITY FOR THE USE OF
ANY PRODUCT(S) DESCRIBED HEREIN EXCEPT AS
EXPRESSLY AGREED TO IN WRITING BY LSI LOGIC.

License Restriction

The purchase or use of an LSI Logic product does not convey a
license under any patent, copyright, trademark, or other intellectual
property right of LSI Logic or third parties.

Copyright Notice

Copyright © 2001, 2002. LSI Logic Corporation. All rights
reserved.

Trademark Acknowledgments

LSI Logic, the LSI Logic logo, MORE, Mylex, and SANmapping
are trademarks or registered trademarks of LSI Logic Corporation.
All other brand and product names may be trademarks of their
respective companies.

About This Manual

This installation guide covers hardware set-up and configuration procedures
necessary for the installation of a Mylex AcceleRAID 170LP single channel
RAID controller.

Chapter 1 describes the controller, standard package contents, and user­supplied items necessary for installation.

Chapter 2 describes the steps to be performed prior to controller installation
and the physical installation of the AcceleRAID 170LP single channel RAID
controller.

Chapter 3 describes controller start-up and the BIOS resident utilities.
Appendix A provides hardware and environmental specifications.
Appendix B describes error messages and problem correction.
Appendix C describes the PCI Hot Plug feature.
Appendix D provides enclosure management information.

Conventions

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

prompt This style of type indicates screen display messages

Enter Press the key labeled “Enter” (or “Delete”, etc.)

☛Note

Supplementary information that can have an effect on

system performance.

 Caution

Notification that a proscribed action has the potential

to adversely affect equipment operation, system

performance, or data integrity.

 WARNING

Notification that a proscribed action will definitely

result in equipment damage, data loss, or personal

injury.

Contents

Chapter 1

Introduction

Product Description .......................................................................... 1–1

Controller Features ...................................................................1–3

Channel Capabilities ................................................................. 1–3

Controller Capabilities ............................................................... 1–3

Operating System Support ........................................................ 1–4

Standard Package Contents ..................................................... ....... 1–5

Hardware ...................................................................................1–5

Software .................................................................................... 1–5

User-supplied Items .................................................................. ....... 1–6

Chapter 2

Installation

Before You Begin ............................................................................. 2–2

Safety Considerations ...................................................................... 2–3

Installation Checklist .........................................................................2–4

GET READY .............................................................................2–4

GET SET ....................................... ... ... .................................. .. ..2–4

GO ............................................................................................. 2–4

Connectors, LEDs, and Jumpers ...................................................... 2–5

PCI Hotplug ............................................................................. ..2–5

Installation Process .............................. .................................. ... ... .... 2–8

Installing the Controller Into a Standard Chassis .................... 2–10

Installing the Controller Into a 2U Chassis .............................. 2–11

Preparing the SCSI Drives ......................................................2–12

SCSI Termination ....................................................................2–14

SCSI Cabling .................................................................................. 2–18

LVD Mode ...............................................................................2–18

Single-ended Mode .................................................................2–18

Limitations on Mixing SCSI Drives .................................................2–19

Narrow with Wide SCSI Drives ................................................2–19

LVD with Single-ended Drives ................................................2–19

Chapter 3

Controller Start-up

BIOS Options ........................................................... ... .....................3–1

Setting BIOS Options ................................................................ 3–2

Manual No. DB11-000024-00 iii

BIOS Configuration Utility (RAID EzAssist) ......................................3–4

Operating System .............................................................................3–4

Operating System Device Drivers .......................................... ...........3–4

Global Array Manager (GAM) Client ................................................. 3–4

In Case of Problems ................. ........................................................3–5

Appendix A

AcceleRAID 170LP
Specifications

General Hardware Specifications ................ .....................................A–1

AcceleRAID 170LP ....................................................................A–1

Environmental Specifications ....................................................A–2

Appendix B

AcceleRAID 170LP
Error Messages

Start-up Error Messages ...................................................................B–1

Drive Check Error Messages ............................................................B–1

Installation Abort ..............................................................................B–2

System Reboot or Power Down ........................................................B–3

Appendix C

PCI Hot Plug

Introduction .......................................................................................C–1

Implementation .................................................................................C–1

NetWare ....................................................................................C–1

Windows NT ..............................................................................C–3

Windows 2000 ...........................................................................C–3

Windows XP and .NET 32-bit ....................................................C–3

Appendix D

Enclosure Management

Introduction .......................................................................................D–1

SAF-TE .............................................................................................D–1

SES ..................................................................................................D–2

Glossary
SOFTWARE LICENSE AND WARRANTY POLICY

iv AcceleRAID 170LP Installation Guide

Chapter 1

Introduction

This chapter describes:

• The AcceleRAID™ 170LP controller

• Standard package contents

• User supplied items

Product Description

The Mylex AcceleRAID 170LP controller is a PCI to Ultra 160 SCSI single
channel RAID controller with 32-bit, 33MHz PCI capability. The
AcceleRAID 170LP supports one external and one internal Ultra 160 SCSI
connector. The AcceleRAID 170LP controller provides the speed and
functionality required by high demand server platforms. AcceleRAID 170LP
achieves performance breakthroughs in PCI technology, eliminates storage
bottlenecks, and delivers scalable performance. Enclosure Management and
PCI Hot Plug are standard features. The AcceleRAID 170LP controller
requires PCI 2.2 compliant slots.

The AcceleRAID 170LP comes with both a Standard PCI Bracket
(Figure 1-1) for installation into a standard system chassis and a Low
Profile PCI Bracket (Figure 1-2) for installation into a specially designed
2U chassis
.

Manual No. DB11-000024-00 1-1

Product Description

Figure 1-1. AcceleRAID 170LP Controller with Standard Bracket

Figure 1-2. AcceleRAID 170LP Controller with Low Profile Bracket

1-2 AcceleRAID 170LP Installation Guide

Controller Features

Features of the AcceleRAID 170LP controller include:

• One QLogic ISP10160A chip to support one Ultra 160 SCSI LVD
channel

• Intel i960RS RISC processor operating at 100MHz

• 16MB ECC SDRAM cache memory, soldered on board (fixed)

• PCI 2.2 compliant

• 1MB, 8-bit flash EEPROM for BIOS and code

• 32KB, 8-bit NVRAM for error log controller configuration

• Built-in configuration utilities (in BIOS)

• Write-through and write-back cache support

• PCI Hotplug capability allowing the AcceleRAID 170LP to be
swapped with a replacement without powering down the system

 Caution

Be sure the motherboard you are using supports
PCI Hotplug before attempting to use this feature,
or serious damage to the controller and/or the
motherboard could result. (The motherboard must be
PCI 2.2 compliant to use this feature.)

Introduction

Channel Capabilities

15 Ultra 160 SCSI devices per channel

Controller Capabilities

• 15 physical drives in the drive group (array)

• 32 total logical drives on the controller

• Supports RAID levels 0, 1, 0+1, 3, 5, 10, 30, 50, and JBOD

Manual No. DB11-000024-00 1-3

Product Description

Operating System Support

MS-DOS 6.x and above are supported using drivers that reside in the
AcceleRAID BIOS. Drivers in the Disk Array Controller Software Kit,
included with the AcceleRAID 170LP controller, support other popular
operating systems. (Refer to5 the PCI Disk Array Controller Drivers
Installation Guide and User Manual.)

1-4 AcceleRAID 170LP Installation Guide

Introduction

Standard Package Contents

The following items are supplied with the standard shipping package:

Hardware

• AcceleRAID 170LP Disk Array Controller with documentation
included on the CD-ROM and a printed Quick Installation Guide

• 16MB ECC cache memory, soldered on board (fixed)

Software

• On-board RAID EzAssist disk array controller configuration utility
with documentation on CD-ROM and a printed Quick Configuration
Guide

• Software Kit Driver diskettes with documentation on CD-ROM

• Global Array Manager (GAM) Server and Client software with
documentation on CD-ROM

Figure 1-3. Standard Package Contents

Manual No. DB11-000024-00 1-5

User-supplied Items

User-supplied Items

The following user-supplied items are required to perform this installation:

• IBM-PC™ compatible host system with PCI 2.2 compliant slot

• Network operating system software (as required)

• SCSI cables to connect the controller and disk arrays (when used in a
2U chassis server, a low profile cable connector may be required)

• Static grounding strap or electrostatic discharge (ESD) safe work area

• Disk array enclosure (or equivalent) with SCSI disk drives

1

1. It is recommended that you use an Amphenol® Fast 40 LVD,
round cable and a Hitachi ® twisted pair, flat cable.

1-6 AcceleRAID 170LP Installation Guide

Chapter 2

Installation

This chapter describes:

• Before You Begin

• Safety Considerations

• Installation Checklist

• Connectors, LEDs, Jumpers

• Installation Process

• SCSI Termination

• Setting SCSI Device IDs

•SCSI Cabling

• Limitations on Mixing SCSI Drives

Mylex disk array controllers are designed to work in a variety of SCSI RAID
application environments. Certain configuration steps need to be performed
prior to installing the controller into a RAID environment. Each of the steps
described in this chapter is part of the installation process.

Manual No. DB11-000024-00 2-1

Before You Begin

Before You Begin

Installing the AcceleRAID 170LP single channel RAID controller is no
more difficult than installing any 32-bit PCI adapter card. The AcceleRAID
170LP single channel controller connects into any PCI 2.2 compliant slot on
the motherboard. Follow these steps and the installation procedures in this
chapter.

☛Note

Recommended: Connect the AcceleRAID 170LP into
a 32-bit PCI slot to reserve the 64-bit PCI slot for
64-bit controllers.

 WARNING

Working with the system covers off and power
applied to the system can result in shock and
serious injury .

1. Power off the system and disconnect the power cables before starting
the installation. Refer to the instructions provided in your system
documentation. Do not disconnect cables or power cords while system
power is on.

2. Check the size of the bracket installed on your controller. If necessary,
change the bracket to match your installation needs.

3. Read all of the instructions in this chapter completely before proceed­ing. Follow the Notes, Cautions, and W arnings described in this manual
and marked on the equipment.

4. Follow electrostatic discharge (ESD) safety procedures. Use a
grounded wrist strap or ESD safe footwear, and work in an ESD safe
area.

5. Make sure all SCSI conventions (cable type, cable length, termination,
etc.) are followed, see Table 2-1.

2-2 AcceleRAID 170LP Installation Guide

Installation

Table 2-1. SCSI Formats and Bus Lengths

SCSI Trade Association
(STA) Terms

SCSI-1 5 8 6 - 8
Fast SCSI 10 8 3 - 8
Fast Wide SCSI 20 16 3 - 16
Ultra SCSI 20 8 1.5 - 8
Ultra SCSI 20 8 3 - 4
Wide Ultra SCSI 40 16 - - 16*
Wide Ultra SCSI 40 16 1.5 - 8
Wide Ultra SCSI 40 16 3 - 4
Ultra2 SCSI 40 8 Not Defined 12† 8
Wide Ultra2 SCSI 80 16 Not Defined 12† 16
Ultra 160 SCSI 160 16 Not Defined 12 16

* The Maximum number of devices allowed on a Wide Ultra SCSI bus is 8, unless bus

extender technology is used.

† This length can be extended to 25 meters if there are only 2 devices (e.g., the controller and

one drive) on the bus in a point-to-point configuration.

Bus

Speed,

MB/Sec,

Max.

Bus

Width,

Bits

Max. Bus Length, Meters Max. Device

Single-ended Low-Voltage

Differential

Support

(Including

Controller)

Safety Considerations

Be sure to observe the following precautions before beginning the controller
installation procedure:

 Caution

Anti-static handling procedures are required. Leave
the controller in its anti-static bag until it is time to
plug the controller into the PCI slot. The use of a
grounded wrist strap and other ESD protective
measures are highly recommended.

 WARNING

Disconnect the system from the electrical wall
outlet before opening the system cabinet. Working
with the system covers off and power applied to the
system can result in shock and serious injury.

Manual No. DB11-000024-00 2-3

Installation Checklist

Installation Checklist

GET READY

☛Note

It is recommended that you wear a grounded wrist
strap when performing hardware installation
procedures.

1. ____ Power off your computer system.

2. ____ Verify that you have the correct bracket installed on the controller.

3. ____ Remove the plate from the I/O access port to the PCI slot.

4. ____ Remove the AcceleRAID 170LP board from the anti-static bag.

GET SET

☛Note

Review Figure 2-1, Figure 2-2, Figure 2-3,
Table 2-2, and Table 2-3 to get familiar with the
layout of the AcceleRAID 170LP controller board
and the Connectors, Jumpers, and LED descriptions.

5. ____ Plug the AcceleRAID 170LP board into a standard PCI slot.

6. ____ Secure the AcceleRAID 170LP board’s mounting bracket with a

screw or retainer.

7. ____ Connect the SCSI cable(s) from your drive(s) and/or device(s) to

the SCSI channel.

8. ____ Check SCSI termination for internal and/or external devices.

9. ____ Check disk drives. Be sure termination is set to the disabled

position on any disk drive(s) that will not be terminated. For
more information, see the documentation that accompanied the
disk drives.

10. ____ Set SCSI ID on the disk drive(s).

11. ____ Enable termination power on disk drive(s).

12. ____ Safety check the installation.

GO

13. ____ Go to Chapter 3, “Controller Board Start-up”.

2-4 AcceleRAID 170LP Installation Guide

Installation

Connectors, LEDs, and Jumpers

There is one external and one internal Ultra 160 SCSI connector supported
on the AcceleRAID 170LP controller shown in Figure 2-1, labeled as CH 0.

The AcceleRAID 170LP controller has four LEDs on the front side as shown
in Figure 2-2 and described in Table 2-2. The LEDs indicate SE (single
ended), LVD, terminator enabled, and FAIL modes.

SCSI jumpers should normally be set to their default settings, no adjustments
are needed. Default jumper locations are shown in Figure 2-3 and are
described in Table 2-3.

When you have checked the termination requirements, completed the
connections of your desired SCSI devices, and other possible devices such as
a CD-ROM drive or a tape drive, close your system with the cover.

PCI Hotplug

☛Note

Please see Appendix C for information on how to
implement the Hotplug feature for your system’s
requirements.

Manual No. DB11-000024-00 2-5

Connectors, LEDs, and Jumpers

CH0

CH0

Figure 2-1. AcceleRAID 170LP Controller with Channel 0 Connectors

D1 D2 D3 D4

Figure 2-2. AcceleRAID 170LP LEDs

Table 2-2. LED Descriptions

D1 FAIL (Processor Self Test)
D2 TERM_LED (Terminator Enabled)
D3 SCSI_LVD Mode
D4 SCSI_SE (Single Ended) Mode

2-6 AcceleRAID 170LP Installation Guide

Installation

JP1

J1

JP3 JP4

Figure 2-3. AcceleRAID 170LP Jumper Locations

Table 2-3. AcceleRAID 170LP Jumper Descriptions

JP1 SCSI Activities LED Header
JP3 Maintenance Mode
JP4 Cache Dirty (monitor cache write back) – LED Header
J1 Debug serial edge connector

Manual No. DB11-000024-00 2-7

Installation Process

Installation Process

Follow these installation steps:

1. Choose any available 32-bit or 64-bit PCI slot as shown in Figure 2-4.

Figure 2-4. Choose an Available PCI Slot

2. Remove the metal cover plate from the slot’s access port (at the back of
the cabinet) usually by releasing the black clip as shown in Figure 2-5.

Figure 2-5. Remove the Metal Plate

2-8 AcceleRAID 170LP Installation Guide

Installation

 Caution

Be sure to wear a ground wrist strap at all times.

3. Remove the AcceleRAID 170LP controller from the anti-static bag,
by holding it at the edges, as shown in Figure 2-6.

Ground
Wrist Strap

AcceleRAID 170LP

Figure 2-6. Remove the Controller from the Anti-static Bag

Manual No. DB11-000024-00 2-9

Installation Process

Installing the Controller Into a Standard Chassis

If you are using a specially designed 2U chassis, see “Installing the
Controller Into a 2U Chassis” on page 2-11.

☛Note

If the controller has the Low Profile PCI bracket
installed, replace it with the standard PCI bracket.

1. With the power off, plug (install) the AcceleRAID 170LP controller
firmly into any 32-bit or 64-bit PCI slot as shown in Figure 2-7.

32-bit PCI Slot

AcceleRAID 170LP

Ground

Wrist

Strap

Ground Clip

Figure 2-7. Plug the Controller Board into any 32-bit or 64-bit PCI Slot

2. Go on to “Preparing the SCSI Drives” on page 2-12.

2-10 AcceleRAID 170LP Installation Guide

Installation

Installing the Controller Into a 2U Chassis

Follow these installation steps: (You may need to check the manufacturer’s
installation instructions for your particular 2U chassis.)

☛Note

If the controller has the standard PCI bracket
installed, replace it with the Low Profile PCI bracket.

1. Choose the riser adapter with an available PCI slot. In this case, it is
presented on an angle (Figure 2-8).

2. With the power off, plug (install) the controller board firmly into the
32-bit PCI slot, and snap it into place (Figure 2-8).

Figure 2-8. Plug the Controller into a 32-bit PCI Slot into the 2U Chassis

In the finished installation, the controller will be in a flat, horizontal
position (Figure 2-9).

32-Bit PCI

Low Profile

Bracket

AR170LP

Figure 2-9. AcceleRAID 170LP Installed into a 2U Chassis

Manual No. DB11-000024-00 2-11

Installation Process

Preparing the SCSI Drives

To prepare the drives for installation, follow these steps:

1. Remove any terminators attached to the drive or set any drive
termination jumpers to the disabled position.

2. Set the SCSI IDs on the drives, using a unique address between 0 and
15, but do not use address 7, as it is reserved for the controller. You
may need to refer to the instructions that came with your disk drives.

3. Enable term power on the drives.

Refer to the drive manual for specific information about drive configuration
settings.

Installing Cables and Setting Termination

Please refer to Table 2-4 on page 2-18 for SCSI Formats and Bus Length
requirements.

4. There are three possible configurations to connect devices to the
AcceleRAID 170LP controller:

(a) Connect the SCSI cable from to the internal SCSI connector on

the AcceleRAID 170LP controller to an internal disk drive set
(Figure 2-10).

Figure 2-10. Connecting Internal Disk Drives to the AcceleRAID 170LP

2-12 AcceleRAID 170LP Installation Guide

Installation

(b) Connect the SCSI cable from the external SCSI connector on the

AcceleRAID 170LP controller to an external drive set or external
cabinet enclosure (Figure 2-11).

Figure 2-11. Connecting External Disk Drives to the AcceleRAID 170LP

(c) Connect internal devices as in (a), and external devices as in (b).

The combined configuration is illustrated in Figure 2-12.

Figure 2-12. Combined Internal and External Configuration

Manual No. DB11-000024-00 2-13

Installation Process

☛Note

A combined configuration using both internal and
external connectors works best with high quality
cables. It is recommended that you use an
Amphenol® Fast 40 LVD, round cable and a
Hitachi® twisted pair, flat cable in this unique setup.

☛Note

In order to ensure an error free environment, the
proper cable type designed for a certain SCSI
speed must be used, please refer to Table 2-4 on page
2-18.

☛Note

To avoid problems caused by mixing drive types,
please refer to “Limitations on Mixing SCSI Drives”
on page 2-19.

SCSI Termination

Each end of a SCSI bus must be terminated to maintain proper voltage levels
for SCSI control and data signals. The device used for this purpose is called
a terminator. Termination devices can be built into a controller, a SCSI
device, or attached to the end of a SCSI bus.

The AcceleRAID 170LP controller is equipped with automatic SCSI bus
termination circuitry. If the controller is at the end of a SCSI bus, it
automatically enables on-board termination. The controller can also detect
whether single-ended (SE) or low-voltage differential (LVD) termination is
required, and can automatically configure the appropriate termination type.

The end of the SCSI bus farthest from the controller must be terminated. See
Figure 2-13 for an example of a SCSI device configuration connected to the
internal SCSI channel.

☛Note

When connecting SCSI devices, it is better to
terminate the ends of the SCSI bus itself, rather than
to terminate the end devices on the bus. This allows
hot swap devices to be added or removed from the
SCSI bus without affecting termination.

2-14 AcceleRAID 170LP Installation Guide

Installation

Termination – Only Internal or Only External Devices

Check that the drive channel is properly terminated according to drawings
below. Termination is indicated with a T enclosed in a square.

The AcceleRAID 170LP is equipped with automatic SCSI termination
circuitry which handles automatic enabling and disabling of on-board
termination. For example, if the controller board is at the end of the SCSI
bus, it automatically enables on-board termination.

The end of the SCSI bus farthest from the controller board must have a
terminator installed; the controller board automatically enables on-board
termination. See Figure 2-13 for an example of an internal drive
configuration. See Figure 2-14 for an example of an external drive
configuration.

Figure 2-13. Termination with Internal Drive Configuration

Figure 2-14. Termination with External Drive Configuration

Manual No. DB11-000024-00 2-15

Installation Process

Termination - Both Internal and External Devices

Check that the drive channel is properly terminated according to
Figure 2-15. Termination is indicated with a T enclosed in a square.

If the controller board is in the middle of the SCSI bus, it automatically
disables on-board termination. If some SCSI devices on the channel are
connected to the internal connector, and some are connected to the external
connector, the two ends of the SCSI bus farthest from the controller board
must each be terminated.

See Figure 2-15 for an example of a combined internal and external
termination configuration.

☛Note

It is better to terminate the ends of the SCSI bus itself
than it is to terminate the end devices on the bus. This
allows hot swap devices to be added or removed from
the SCSI bus without affecting termination.

Figure 2-15. Termination with Internal and External Drive Configuration

Remove or set disk drive termination jumpers to the disabled position (if
needed). Refer to the documentation furnished with your disk drives to
determine if your termination jumpers need to be adjusted.

2-16 AcceleRAID 170LP Installation Guide

Installation

Setting SCSI Device IDs

5. Set the SCSI ID on the disk drives; ID 7 is reserved for the controller
board (Figure 2-16).

☛Note

Each drive must have a unique ID chosen from
0 through 6 or 8 through 15. Be careful not to
duplicate a drive address.

Remember: ID 7 is reserved for the controller board;
therefore, it cannot be used as a disk drive ID.

ID’s from 0 through 6 are usually for Narrow,
8-bit devices. Howev er, the full range of SCSI ID
addresses, 0 through 6 and 8 through 15 can be
used for Wide, 16-bit devices.

See your device documentation for instructions on
how to set your particular disk drive’s SCSI address.

SCSI ID Numbers

7 is reserved for the controller

Figure 2-16. SCSI ID Numbers

Manual No. DB11-000024-00 2-17

SCSI Cabling

SCSI Cabling

The controller supports one Ultra 160 SCSI channel which can support up to
15 SCSI devices (plus the controller itself).

LVD Mode

The controller supports Ultra 160 SCSI with LVD. If all drives attached to a
controller drive channel support Ultra 160 SCSI with LVD, then that channel
will operate at a maximum of 160MB/s burst speed. This setup allows a
maximum SCSI bus length of up to 12 meters.

☛Note

The SCSI bus length can be extended up to 25 meters
if only the controller and one drive are on the bus in a
point-to-point configuration.

Single-ended Mode

If any device on the channel does not hav e LVD electrical characteristics, the
channel will revert to single-ended operation mode. The SCSI bus lengths
will then be limited to the single-ended bus lengths shown in Table 2-4.

Table 2-4. SCSI Formats and Bus Lengths

SCSI Trade Association
(STA) Terms

SCSI-1 5 8 6 - 8
Fast SCSI 10 8 3 - 8
Fast Wide SCSI 20 16 3 - 16
Ultra SCSI 20 8 1.5 - 8
Ultra SCSI 20 8 3 - 4
Wide Ultra SCSI 40 16 - - 16*
Wide Ultra SCSI 40 16 1.5 - 8
Wide Ultra SCSI 40 16 3 - 4
Ultra2 SCSI 40 8 Not Defined 12† 8
Wide Ultra2 SCSI 80 16 Not Defined 12† 16
Ultra 160 SCSI 160 16 Not Defined 12 16

Bus

Speed,

MB/Sec,

Max.

Bus

Width,

Bits

Max. Bus Length, Meters Max. Device

Single-ended Low-Voltage

Differential

Support

(Including

Controller)

* The Maximum number of devices allowed on a Wide Ultra SCSI bus is 8, unless bus

extender technology is used.

† This length can be extended to 25 meters if there are only 2 devices (e.g., the controller and

one drive) on the bus in a point-to-point configuration.

2-18 AcceleRAID 170LP Installation Guide

Installation

Limitations on Mixing SCSI Drives

Narrow with Wide SCSI Drives

If you mix narrow and wide SCSI devices on the controller, use a converter
that does not terminate the upper eight bits, and be sure to properly terminate
the end of the bus with either a 16-bit terminator or a 16-bit device that has
termination enabled.

LVD with Single-ended Drives

If LVD capable drives are installed on a channel with single-ended devices,
all drives on the channel will operate as if they were single-ended devices.
This will also limit the bus length to the single-ended bus length specified in
Table 2-4.

Manual No. DB11-000024-00 2-19

Limitations on Mixing SCSI Drives

2-20 AcceleRAID 170LP Installation Guide

Chapter 3

Controller Start-up

This chapter describes:

• BIOS Options Sequence

• BIOS Configuration Utility (RAID EzAssist)

• Operating System, Device Drivers, GAM

• What to Check in Case of Problems

This chapter describes the AcceleRAID 170LP RAID controller start-up
procedures and messages produced by the BIOS during start-up or re-boot.
This chapter also explains three BIOS options that are available for
configuring controller operation.

BIOS Options

After physically installing the controller and connecting the cabling, do the
following if you need to set or modify a BIOS option. For more details, see
“Setting BIOS Options” later in this chapter.

1. Power on the computer.

2. Watch the messages on the screen for the following prompt to be
displayed:

Press <ALT-M> for BIOS options

3. Press Alt–M to get into the BIOS Options menu.

4. The BIOS Options menu provides the following items to choose from:

5. To select any of the items in the menu, highlight the selection with the
Up Arrow or Down Arrow. Press Enter to toggle any of the three
items.

☛Note

BIOS must be enabled to toggle the CD-ROM boot
option.

Manual No. DB11-000024-00 3-1

BIOS Options

Setting BIOS Options

The available BIOS options are:

• BIOS disabled / enabled

• CD-ROM boot disabled / enabled

• 2GB / 8GB drive geometry

BIOS Disable or Enable

This option must be enabled in order to toggle the CD-ROM boot parameter
shown in the BIOS Options menu. The BIOS must also be enabled in order
to boot from any device (e.g., CD-ROM) or system drive configured on the
controller, or to access any DOS partition on any drive configured on the
controller.

When BIOS Disable or Enable is selected, the following message will be
displayed.

Press the Esc key to restart the system and then watch the screen for the
BIOS enabled and BIOS disabled messages.

CD-ROM Boot Disable or Enable

The default for this option is for the CD-ROM boot to be disabled (e.g., the
system will boot from a hard drive, even if there is a bootable CD-ROM
installed on the AcceleRAID 170LP). If the CD-ROM boot option is
enabled, and if a bootable CD is installed in the CD-ROM drive connected to
the Mylex controller, the system can boot from the CD. You will also get an
option to bypass the CD-ROM boot feature.

If the CD-ROM boot option is enabled, the CD-ROM attached to the
AcceleRAID 170LP will take priority over the disk drives. For example,
under MS-DOS, the disk drive that is normally Drive C will become Drive
D. All subsequent drive IDs will similarly be moved down.

3-2 AcceleRAID 170LP Installation Guide

Controller Start-up

Enable 8 GByte or 2 GByte Drives

This setting determines how the System ROM BIOS reads the Logical
Drives for partitions. There is a 1024 Cylinder limitation by the System
BIOS. The controller can be set to translate this into either 8 gigabytes
(8 GB) or 2 gigabytes (2 GB). The default is 8 GB and will be fine for most
installations.

It may be more efficient to set this value to “2 GB Drives” if all of the
System drives to be created will be using a F AT file system and will be equal
to or less than 2 GB.

☛Note

Different Operating systems may not be able to use
more than 2 GB in one partition. For instance, the
MS-DOS file allocation table (FAT) can support only
2 GB partitions. Windows 95 OEM Service Release
version 2 and later use the FAT32 file system and can
support up to 4 GB. Microsoft Windows 3.51 supports
F AT drives up to 4 GB. This limits the size of the boot
partition in Windows NT to 4 GB. See your operating
system manual for any drive size limitations.

 Caution

Changing this setting after data has been stored will
make the data unreadable. If you have already
configured your array and have stored data, you
should not change this setting.

☛Note

In the event that the RAID controller needs to be
replaced, the current drive geometry will be restored

Manual No. DB11-000024-00 3-3

BIOS Configuration Utility (RAID EzAssist)

from the configuration on disk (COD).

BIOS Configuration Utility (RAID EzAssist)

RAID EzAssist is the on-board BIOS Configuration Utility used to build
several types of RAID configurations. Refer to the RAID EzAssist

Configuration Utility User Reference Guide or RAID EzAssist Configuration
Utility Quick Configuration Guide for instructions on starting and using this

utility.

Operating System

If an operating system is not already installed on the computer, it can be
installed on a system disk connected to the Mylex controller. The operating
system is installed along with the operating system device drivers.

Operating System Device Drivers

Device drivers that are compatible with the controller can be found in the
Software Kit. For details on how to install and load drivers, refer to the PCI
Disk Array Controller Drivers Installation Guide and User Manual av ailable
on the CD-ROM.

Global Array Manager (GAM) Server

The Global Array Manager Server software supports a variety of operating
systems. For details on how to install GAM Server, refer to the Global Array
Manager Server Software Installation Guide and User Manual available on
CD-ROM.

Global Array Manager (GAM) Client

The controller can be configured using Global Array Manager Client. GAM
Client can also be used from the server or a system client to monitor status
and verify data integrity of disks connected to the controller while the system
and disks are running.

For details on how to install and run GAM Client, refer to the Global Array
Manager Client Software Installation Guide and User Manual.

3-4 AcceleRAID 170LP Installation Guide

Controller Start-up

In Case of Problems

If problems are encountered during start-up, check the following:

• Check SCSI cabling for loose connections, pin mismatches (make sure
pin 1 on the cable matches pin 1 on the connector), bent pins, and
damaged or crossed cables.

• Check cable length; this includes internal bus lengths in enclosures.

• Check termination.

• Check SCSI IDs on all drives.

• Check to see if any of the LED lights on the AcceleRAID 170LP
controller are on.

If the motherboard is PCI 2.2 compliant then at least one of these LED
lights will be on: D1, D2, D3, D4.

Manual No. DB11-000024-00 3-5

In Case of Problems

3-6 AcceleRAID 170LP Installation Guide

Appendix A

AcceleRAID 170LP

Specifications

General Hardware Specifications

AcceleRAID 170LP

Controller AcceleRAID 170LP

CPU i960RS microprocessor, 100MHz
Cache

Memory

Firmware ROM Type, Flash EEPROM, 1MB x 8

PCI 32 bit, 33MHz – Host

SCSI Supports a single channel Ultra 160 SCSI LVD

16MB ECC cache memory soldered on board (fixed)

Write: Selectable, Write-Through or Write-Back
Error Protection: ECC (Error Correction Code)

32 bit, 33MHz – Internal PCI

ISP10160A

Manual No. DB11-000024-00 A-1

General Hardware Specifications

Environmental Specifications

Controller AcceleRAID 170LP

Temperature Operating 0°C to +50°C (+32°F to 131°F)

Storage -20°C to +70°C (-4°F to +158°F)

Humidity Operating 10% to 90% relative humidity (non-condensing)

Storage 10% to 90% relative humidity (non-condensing)

Altitude Operating Up to 3,048m (10,000 ft )

Storage Up to 15,240m (50,000 ft)

Form Factor MD2 (Low

Profile)
Length: 6.6 inches

Width: 2.5 inches
Maximum

Component
Height:

Typical Power
Consumption at 5.0V 15 watts, maximum

0.105 inches on the solder side of the board

0.570 inches on the component side of the board

below 3A

MTBF above 250,000 hours at 55°C

A-2 AcceleRAID 170LP Installation Guide

Appendix B

AcceleRAID 170LP

Error Messages

☛Note

The firmware you are using may have these messages
turned off. However, they are listed here for your
reference.

Start-up Error Messages

The BIOS looks for any initialization message posted by the firmware during
the start-up sequence. If a message is found, one of the following errors
displays on screen and the installation process aborts.

AcceleRAID 160 fatal error--Memory test failed!
AcceleRAID 160 fatal error--Command interface test failed!
AcceleRAID 160 hardware error--Run Diagnostics to pinpoint

error
AcceleRAID 160 firmware checksum error--Reload firmware

Drive Check Error Messages

If the firmware finds a valid controller configuration, but it doesn't match the
SCSI drives currently installed, one or more of the following messages
display. Then, the BIOS prints out the following:

AcceleRAID 160 Configuration Checksum error--Run
configuration utility!

If the firmware detects that during the last power c ycle the system was turned
off abruptly leaving some incomplete write operations, the following
message appears:

Recovery from mirror race in progress
WARNING: Dead SCSI devices (Channel Target) : x:y

The following messages may also appear:

AcceleRAID 160 cannot recover from Mirror Race!

Some system drives are inconsistent!

Manual No. DB11-000024-00 B-1

Installation Abort

During the initialization, if the firmware fails to respond to the BIOS inquiry
within two minutes, the following message displays:

AcceleRAID 160 not responding--no drives installed!

The BIOS then inquires the firmware for its version number and other
information, and displays the following message:

AcceleRAID 160 Firmware Version x.xx

One or more of the following messages will be displayed if the firmware
reports the following conditions:

Warning: X system drives offline
Warning: X system drives critical
WARNING: Dead SCSI devices (Channel : Target) : x:y
No system drives installed
X system drives installed

The BIOS repeats the same process for additional RAID controllers present
in the system. Then it proceeds to boot, if possible, from the first system
drive on the first controller.

Installation Abort

With Firmware 6.x, the installation aborted message is displayed when the
BIOS finds that the configuration of the disk drives is different from what it
senses at boot time. When this happens, and a new installation is not being
attempted, the cause is often a faulty cable or missing drive, or a loose
connection. Check all of the connectors, cables, drives, and try to boot. If the
error persists, it most likely indicates a genuine failure and needs to be
corrected. To correct it, boot and run the on-board BIOS Configuration
Utility, RAID EzAssist (see Chapter 3). For more information, refer to the

RAID EzAssist Configuration Utility User Reference Guide or Quick
Configuration Guide.

With Firmware 6.x, if the BIOS displays a mismatch in the Configuration on
Disk (COD) on all drives, then the following message will be displayed,
“install abort”– no drives will be installed. If you get this message, boot and
run RAID EzAssist, the on-board Mylex Disk Array Configuration Utility.
See Chapter 3 to recover from the error. For more information, refer to the

RAID EzAssist Configuration Utility User Reference Guide or Quick
Configuration Guide.

B-2 AcceleRAID 170LP Installation Guide

AcceleRAID 170LP Error Messages

System Reboot or Power Down

Status messages may also be available from LED indicators connected to the
controller. The Cache Dirty indicator is especially important when preparing
to power-down the system.

 Caution

It is very important to make sure that all data is
written to the disk before rebooting or powering down
the system, or you may lose data. It is always a good
idea to wait for 60 seconds or until all activity stops
before resetting, rebooting, or powering off the
system.

The AcceleRAID 170LP controller is a caching controller with 16MB
(fixed) of cache memory. When the system reports that a write command
was completed, data may still be in the cache waiting to be written to the
disk drives.

Manual No. DB11-000024-00 B-3

System Reboot or Power Down

B-4 AcceleRAID 170LP Installation Guide

Appendix C

PCI Hot Plug

Introduction

PCI Hot Plug is a feature that allows a PCI card to be replaced while the host
system is still running. The term “Hot Plug” is somewhat misleading: the
PCI card cannot simply be pulled out of the host system while the card is
operating without risk to the card, the system, and the data on the system.

In order to replace a Hot Plug PCI card, a software command must be
invoked to power off the card slot before the card can be removed. After the
software indicates that the card is unloaded and the slot is powered off, a
physical card retainer/switch must be released to allow the card to be
removed from the PCI bus. At this point, the card can be replaced.

At this time, Mylex only supports Hot Replacement of PCI Hot Plug cards.
Future releases are planned to support Hot Upgrade or Hot Expansion
(adding a card).

Implementation

Aside from the general terms previously mentioned, PCI Hot Plug
implementation is specific to the host hardware platform and the operating
system running on it. Refer to your host system's documentation for specific
details on how to implement PCI Hot Plug.

NetWare

When NetWare is installed on a system capable of PCI Hot Plug, the
following four modules are installed:

• cpqsbd.nlm – This is the Compaq system bus driver (a different driver
will be needed for a platform other than Compaq).

• ncm.nlm – This is the Novell Configuration Manager, which manages
the PCI Hot Plug system.

• ncmcon.nlm – This is the Hot Plug user interface called the Novell
Configuration Manager Console.

Manual No. DB11-000024-00 C-1

Implementation

• odineb.nlm – This is a module combining the Open Data-link interface
and the Novell Event Bus (NEB). The NEB controls the device drivers
through the Open Data-link.

If the NetWare installation process determines that the server supports PCI
Hot Plug and detects the appropriate driver, the installation process adds the
following two LOAD commands to the autoexec.ncf file:

• LOAD sys:\system\driver_name
This command loads the bus driver (for Compaq, this is cpqsbd.nlm).

After this command is executed, NetWar e autoloads ncm.nlm (Novel
Configuration Manger).

• #LOAD sys:\system\ncmcon.nlm
The # symbol comments out the command; however, if you want the

Configuration Manager Console (ncmcon.nlm) to be loaded every time
the system is started, remove the pound sign (#) at the beginning of the
line.

This command loads the Novell Configuration Manager Console,
which then loads odineb.nlm. These commands can also be ex ecuted at
the server console prompt.

Perform the following steps:

1. Install NetWare 5 Service Patch 1.

2. Install the Mylex GAM DMI driver.

3. Restart the server. The autoexec.ncf will execute and load the drivers
and start ncmcon.nlm (the PCI Hot Plug user interface).

☛Note

If any LOAD line is commented out in autoexec.ncf,
the corresponding driver can be loaded manually by
executing the LOAD command (as listed in
autoexec.ncf) at the server console prompt.

C-2 AcceleRAID 170LP Installation Guide

PCI Hot Plug

Windows NT

Windows NT requires additional software from the vendor who makes the
system. Since this software is not a part of NT, the software needs to be
installed after the operating system is loaded. Refer to your vendor's PCI Hot
Plug documentation.

 Caution

GAM drivers can stop PCI Hot Plug Boards from
unloading. If this problem occurs, stop GAM and
unload the GAM drivers before attempting to unload
the PCI Hot Plug controller.

Known Windows NT Issues

• The macdisk.sys driver should not be loaded with a Mylex PCI Hot
Plug board; if macdisk.sys is loaded, the system will hang upon
shutdown.

• When you install a Mylex controller as a boot device and a Mylex
driver has been installed prior to the installation of the Windows NT
OS, Windows NT will not recognize the Mylex controller as a PCI Hot
Plug device. To fix this, the driver must be reinstalled and the system
rebooted.

This problem occurs because PCI Hot Plug information does not get
loaded into the Windows NT registry for the Mylex controller upon
installation of Windows NT.

Windows 2000

Windows 2000 supports the PCI Hot Plug capability. No additional software
is required.

Please refer to the Windows 2000 documentation for instructions on how to
use the PCI Hot Plug feature.

Windows XP and .NET 32-bit

The released version of Windo w s XP and .NET 32-bit is intended to support
the PCI Hot Plug capability. No additional software is required.

Please refer to the Windows XP or .NET 32-bit documentation for

Manual No. DB11-000024-00 C-3

Implementation

instructions on how to use the PCI Hot Plug feature.

C-4 AcceleRAID 170LP Installation Guide

Appendix D

Enclosure Management

Introduction

Mylex’s AcceleRAID controllers support the industry standard enclosure
management protocol SCSI Accessed Fault-Tolerant Enclosures (SAF-TE).
This feature allows the host to monitor drive enclosures and detect certain
faults or operating environment conditions. The host can make a decision to
shut down the system or issue a warning based on the type of fault detected.
The AcceleRAID 170LP also supports SES (SCSI Enclosure System)
cabinets.

SAF-TE

The SAF-TE protocol follows a specification jointly worked out by Conner
Corporation and Intel Corporation. Enclosures that are compliant with this
protocol are known as SCSI Accessed Fault-Tolerant Enclosures (SAF-TE).
The protocol is compatible with standard SCSI buses and cabling.

The SAF-TE interface standard’s objective is to provide a non-proprietary
means of allowing third-party disks and controllers to be automatically
integrated with peripheral enclosures that support:

• Status Signals (LEDs, audible alarms, LCDs, etc.)

• Hot swapping of drives

• Monitoring of fans, power supplies, and enclosure temperature

SCSI is the underlying transport mechanism for communicating enclosure
information. All standard SCSI host adapters will work. There is no need to
consider reserved signals or special cabling.

The SAF-TE interface can be implemented as a SCSI target that uses a SCSI
port and an 8-bit microcontroller.

All communication is initiated by the host. The SAF-TE processor acts only
in target mode. The SAF-TE processor is periodically polled by the host
approximately every 2 to 10 seconds.

Manual No. DB11-000024-00 D-1

SES

SES

The AcceleRAID 170LP supports SES (SCSI Enclosure System) cabinets.
Please refer to the documentation supplied with your SES enclosure cabinet
for details on how to take advantage of this feature.

D-2 AcceleRAID 170LP Installation Guide

Glossary

AcceleRAID™

The AcceleRAID family features high performance, cost effective SCSI to
PCI RAID controllers and adapters for high-end desktops, workstations,
entry-level and mid-range servers, and high-density ISP servers.

Active/Active

A synonym for Dual Active controllers. Under normal operating conditions,
both controllers in a dual active controller configuration are actively
processing I/O.

Active/Passive

A synonym for Hot Standby.

Active Termination

A type of terminator used in current SCSI channel setups, which utilizes an
active voltage regulator, thus closely matching cable impedance. See als o In-
Line Terminator.

ANSI

American National Standards Institute, a standards organization that
promotes and facilitates understanding among qualified members for the
implementation of agreed upon code and signaling standards and
conformity. ANSI represents the United States in the ISO (International
Standards Organization).

Application Server

A centralized computer that holds and distributes application programs to
users.

Manual No. DB11-000024-00 G-1

ASIC

Application-Specific Integrated Circuit, a chip created for a specific
application.

Auto Swap

The exchange of a pre-installed replacement unit in a disk system for a
defective one; the disk system performs the substitution without human
intervention while continuing to carry out its normal functions (compare
with Hot Swap).

Automatic Rebuild

Mylex controllers provide automatic rebuild capabilities in the event of a
physical disk drive failure. The controller performs a rebuild operation
automatically when a disk drive fails and both of the following conditions
are true:

A standby or hot spare disk driv e of iden tical or larger size is found attached
to the same controller;

All system drives that are dependent on the failed disk drive are configured
as a redundant array: RAID 1, RAID 3, RAID 5, or RAID 0+1.

During the automatic rebuild process, system activity continues; however,
system performance may degrade slightly.

BBU

Battery Backup Unit, provides a battery backup for data currently stored in
the on-board cache memory during intermittent power loss to the controller.
In the event of a power failure, the BBU can hold data in the cache for a
certain amount of time. Once power is restored the data can be saved to a
disk.

Benchmarks

A set of conditions or criteria against which a product or system is measured.
Computer trade magazine laboratories frequently test and compare several
new computers or computer devices against the same set of application
programs, user interactions, and contextual situations. The total context

G-2 AcceleRAID 170LP Installation Guide

Glossary

against which all products are measured and compared is referred to as the
benchmark. Programs can be specially designed to provide measurements
for a particular operating system or application.

Berkeley RAID Levels

A family of disk array protection and mapping techniques described by
Garth Gibson, Randy Katz, and David Patterson in papers written while they
were performing research into I/O systems at the University of California at
Berkeley. There are six Berkeley RAID levels, usually referred to as RAID
Level 0 through RAID Level 5. See also RAID Levels.

Bridge RAID Controller

A device appearing as a single ID in a Storage Area Network (SAN), but
which bridges to multiple devices, typically used to control external RAID
subsystems (compare to Internal PCI-based RAID subsystems, see Internal

RAID Controller). A bridge RAID controller is often referred to as an
External RAID Controller.

Bus

A set of conductors that connect the functional units in a computer and are
the channels through which data is transferred. There are several types of bus
channels, including serial, parallel, PCI, ISA, EISA, and MCA. See also I/O
Bus.

Cables

The physical wires (copper or fibre optic) over which electrical signals are
transmitted. Cables are used to connect peripherals (such as disk arrays) to
computers and servers or to connect peripherals or components (such as tape
drives or CD-ROMs) to each other.

Cache

A temporary storage area for frequently accessed or recently accessed data.
Cache is used to speed up data transfer to and from a disk. See also Caching.

Manual No. DB11-000024-00 G-3

Caching

Allows data to be stored in a pre-designated area of a disk or RAM. Caching
speeds up the operation of RAID systems, disk drives, computers and
servers, or other peripheral devices. See also Cache.

CD-ROM

Compact Disk-Read Only Memory, a removable read-only storage device,
similar to an audio compact laser disk, holding up to 640MB of data.

Channel

Any path used for the transfer of data and control of information between
storage devices and a storage controller or I/O adapter. Also refers to one
SCSI bus on a disk array controller. Each disk array controller provides at
least one channel.

Cluster

A group of terminals or workstations attached to a common control unit or
server, or a group of several serv ers, that share work and may be able to back
each other up if one server fails.

CMOS

Complementary Metal Oxide Semiconductor, a chip that packs many
components onto a very small semiconductor.

Cold Swap

The physical exchange of a replacement unit in a storage system for a
defective one. The exchange requires human intervention and power must be
removed from the storage system in order to perform the exchange (compare
to Warm Swap, Hot Swap, and Auto Swap).

Controller

An adapter card, RAID controller, or other module that interprets and
controls signals between a host and a peripheral device.

G-4 AcceleRAID 170LP Installation Guide

Glossary

CPU

Central Processing Unit, the circuitry that performs the basic instructions
that drive the computer.

Critical State

A Logical Drive is in a “critical” state if it has been configured at RAID lev el
1, 3, 5, or 0+1, and one (and only one) of its SCSI drives is not “online.” A
logical drive is considered “critical” because any failure of another of its
SCSI drives may result in a loss of data.

Note: I/O operation can only be perfor med with system dri ves that are online
or critical.

Cylinder

The tracks of a disk storage device that can be accessed without
repositioning the access mechanism.

DAC960 Series

Disk Array Controller 960 Series, a family of RAID controllers from Mylex
Corporation. The DAC960 series includes both internal PCI-based RAID
controllers and external RAID controllers. The DAC960 series controllers
use Intel’s® i960 microprocessor.

DB-9

A type of connector used for serial interfaces.

Dedicated Hot Spare

A disk drive configured to replace a failed drive in a single or spanned disk
array . Compare with Global Hot Spare and Hot Spare.

Degraded Mode

A RAID mode used when a component drive has failed.

Manual No. DB11-000024-00 G-5

Desktop PC

Standard processor based personal computer used as an individual station
(not as a server).

Device Driver

A software program that controls a particular type of device attached to a
computer, such as a RAID subsystem, printer, display, CD-ROM, disk drive,
etc.

Differential

A protocol that transmits through a current loop rather than by changes in
voltage, reducing susceptibility to electrical interference.

DIMM

Dual In-line Memory Module, a circuit board that has memory chips. Instead
of installing two SIMMs for the 64-bit memory path on a Pentium®
processor, one DIMM can be installed. See also SIMM.

Disk

A non-volatile, randomly addressable, re-writable data storage device,
including rotating magnetic and optical disks as well as solid-state disks or
other electronic storage elements.

Disk Array

A collection of disks from one or more commonly accessible disk systems
configured to behave as a single, independent disk drive. Disk arrays, also
known as RAID, allow disk drives to be used together to improve fault
tolerance, performance, or both. Disk arrays are commonly used on servers
and are becoming more popular on desktops and workstations.

Disk Drive

A device for the electronic digital storage of information.

G-6 AcceleRAID 170LP Installation Guide

Glossary

Disk Failure Detection

A RAID controller automatically detects SCSI disk failures. A monitoring
process running on the controller checks, among other things, elapsed time
on all commands issued to disks. A time-out causes the disk to be “reset”
and the command to be retried. If the command times out again, the
controller could take the disk “offline.” Mylex DAC960 controllers also
monitor SCSI bus parity errors and other potential problems. Any disk with
too many errors will also be taken “offline.” See also Offline.

Disk System

A storage system capable of supporting only disks.

Disk Traveling, Drive Traveling

A process that occurs when the drives are placed in a different order than the
original order. Disk traveling can occur whether or not a drive has failed.

Drive Groups, Drive Packs

A group of individual disk drives (preferably identical) that are logically tied
to each other and are addressed as a single unit. In some cases this may be
called a drive “pack” when referring to just the physical devices.

All the physical devices in a drive group should have the same size;
otherwise, each of the disks in the group will effectively ha v e the capacity of
the smallest member. The total size of the drive group will be the size of the
smallest disk in the group multiplied by the number of disks in the group.
For example, if you have 4 disks of 400MB each and 1 disk of 200MB in a
pack, the effective capacity available for use is only 1000MB (5x200), not
1800MB.

Dual Active

A pair of components, such as storage controllers in a failure tolerant storage
system, that share a task or set of tasks when both are functioning normally.
When one component of the pair fails, the other takes the entire load. Dual
active controllers (also called Active/Active controllers) are connected to the
same set of devices and provide a combination of higher I/O performance
and greater failure tolerance than a single controller.

Manual No. DB11-000024-00 G-7

EDO

Extended Data Output, a type of random access memory (RAM) chip
designed to improve the time to read from memory on faster
microprocessors such as the Intel® Pentium®.

EISA

Extended Industry Standard Architecture, a bus standard for PCs extending
the ISA architecture to 32 bits and allowing more than one CPU to share the
bus.

Embedded Storage Controller

An intelligent storage controller that mounts in a host computer’s housing
and attaches directly to a host’s memory bus with no intervening I/O adapter
or I/O bus.

Ethernet

An Ethernet local area network (LAN) typically uses coaxial cable or special
grades of twisted pair wires, and is the most widely installed local area
network technology. The most commonly installed Ethernet systems are
called 10BASE-T and provide transmission speeds up to 10 Mbps. See also

Fast Ethernet.
10Base T: Supports Ethernet's 10 Mbps transmission speed. The most widely

installed Ethernet local area networks (LANs) use ordinary telephone
twisted-pair wire. When used on Ethernet, this carrier medium is known as
10BASE-T. In addition to 10BASE-T, 10 megabit Ethernet can be
implemented with these media types:

• 10BASE-2 (thinwire coaxial cable with a maximum segment length of
185 meters)

• 10BASE-5 (thickwire coaxial cable with a maximum segment length of
500 meters)

• 10BASE-F (fiber optic cable)

The “10” in the media type designation refers to the transmission speed of 10
Mbps. The “BASE” refers to baseband signaling, which means that only
Ethernet signals are carried on the medium. The “T” represents twisted-pair;

G-8 AcceleRAID 170LP Installation Guide

Glossary

the “2” and “5” refer to the coaxial cable segment length (the 185 meter
length has been rounded up to “2” for 200); the “F” represents fiber optic
cable.

External RAID Controller

A RAID controller in its own enclosure, rather than incorporated into a PC
or server. External RAID controllers are often referred to as a Bridge RAID
Controller. Mylex SANArray FL, FF , FFx, and Pr o FF2 control lers are
external RAID controllers. Compare with Internal RAID Controller.

Extranet

A private network that uses Internet protocols and the public
telecommunication system to securely share part of a business's information
or operations with suppliers, vendors, partners, customers, or other
businesses. An extranet can be viewed as part of a company's Intranet that is
extended to users outside the company.

eXtremeRAID™

A family of Mylex RAID controllers which offer uncompromising fault
tolerance, data availability, supe rio r configuration, and management
flexibility. The eXtremeRAID controllers use driver technology, which has
won tpm-C benchmarks worldwide. With this technology, eXtremeRAID
controllers provide the highest performance and most flexible RAID solution
available today.

Failback

Restoring a failed system component’s share of a load to a replacement
component.

Failover

A mode of operation for failure tolerant systems in which a component has
failed and a redundant component has assumed its functions.

Manual No. DB11-000024-00 G-9

Failover Port

A fibre channel port capable of assuming I/O requests for another, failed port
on the loop. During normal operation, a failover port may be active or
inactive. Failover ports assume the same loop ID and, optionally, the same
node from the failed port.

Failure

A detectable physical change in hardware, requiring replacement of the
component.

Fast Ethernet

A local area network (LAN) transmission standard that provides a data rate of
100 megabits per second (referred to as 100BASE-T). See also Ethernet.
100Base T: In 100 Mbps (megabits per second) Ethernet (known as Fast
Ethernet), three types of physical wiring can carry signals:

• 100BASE-T4 (four pairs of telephone twisted pair wire)

• 100BASE-TX (two pairs of data grade twisted-pair wire)

• 100BASE-FX (a two-strand fiber optic cable)

This designation is an IEEE shorthand identifier. The “100” in the media
type designation refers to the transmission speed of 100 Mbps. The “BASE”
refers to baseband signaling, which means that only Ethernet signals are
carried on the medium. The “T4,” “TX,” and “FX” refer to the physical
medium that carries the signal. (Through repeaters, media segments of
different physical types can be used in the same system.)

Fast SCSI

Devices that increases the speed at which data is transferred as opposed to
the volume of data. These devices using data rates up to 10 MHz. Compare
with Fast/Wide SCSI, Ultra SCSI (Fast 20 SCSI), Ultra2 SCSI (Fast 40
SCSI), Ultra160 SCSI (Ultra3 SCSI), and Wide SCSI.

G-10 AcceleRAID 170LP Installation Guide

Glossary

Fast/Wide SCSI

SCSI devices using data rates up to 20 MHz. Compare with Fast SCSI, Ultra
SCSI (Fast 20 SCSI), Ultra2 SCSI (Fast 40 SCSI), Ultra160 SCSI (Ultra3
SCSI), and Wide SCSI.

Fibre Channel

T echnology for transmitting data between computer devices at a data rate of
up to 2 Gbps (two billion bits per second), especially suited for connecting
computer servers to shared storage devices and for interconnecting storage
controllers and drives.

Fibre Channel is expected to replace the Small System Computer Interface
(SCSI) as the transmission interface between servers and clustered storage
devices. It is also more flexible: devices can be as far as ten kilometers
(about six miles) apart. The longer distance requires optical fiber as the
physical medium; however , fibre channels also work using coaxial cable and
ordinary telephone twisted pair wires.

File Server

A computer shared by users over a Local Area Network (LAN) which
provides user access to files on the LAN. Other types of servers perform
application services (for example, mail servers, web servers) rather than just
store files.

FlashPoint™

A family of Mylex SCSI host bus adapters.

Gigabit

109 (1,000,000,000) bits. Abbreviated as Gb.

Gigabyte

230 (1,073,741,824) bytes. Abbreviated as G or GB.

Manual No. DB11-000024-00 G-11

Global Hot Spare

An extra, physical disk drive placed in an array and used to replace a failed
drive in any disk array. A global spare automatically takes the place of a
failed drive. See also Auto Swap, Dedica ted Hot Spare, and Hot Spare.

Hard Disk

A magnetically coated disk substrate that spins inside a disk drive and is
used as the storage medium for digital data.

Hard Disk Drive (HDD)

The main data storage unit of a computer.

HDM

Hardware Driver Module, a dri ver set required for SCSI adapters for use in
an I

O environment.

2

Host

Any computer system to which disks are attached and accessible for data
storage and I/O.

Host Bus Adapter (HBA)

An I/O adapter that connects a host I/O bus to the host’s storage memory
system.

Host I/O Bus

An I/O bus used to connect a host computer to storage systems or storage
devices.

Hot Plug

The process of adding or removing a device from a bus while transactions
involving other devices are occurring over the bus. See also PCI Hot Plug.

G-12 AcceleRAID 170LP Installation Guide

Glossary

Hot Replacement of Disks

The design of all Mylex controllers allows for the replacement of failed hard
disk drives without interruption of system service. In the event of a SCSI
drive failure on a properly configured system (where the data redundancy
features of the controller are used), the system generates a message to alert
the system operator.

When a replacement drive becomes available, the system operator can
remove the failed disk drive, install a new disk drive, and instruct the
controller to “rebuild” the data on the new drive, all without interrupting
system operations. Once the rebuild is complete, the controller will be
brought back into a fault tolerant state. See also Hot Swap.

Hot Spare

A physical disk drive not part of a system drive that the controller can use to
automatically rebuild a critical system drive. The hot spare drive must have
at least as much capacity as the largest disk drive in the array or the rebuild
may not start. See also Hot Standby and Standby Replacement of Disks.

Hot Standby

A redundant component in a fault tolerant storage system that has power
applied and is ready to operate, but which does not perform its task as long
as the primary component for which it is standing by is functioning properly .
See also Hot Replacement of Disks and Hot Spare.

Hot Swap

The exchange of a replacement unit in a storage system for a defective unit.
The exchange requires human intervention, but the system can continue to
perform its normal functions (compare with Auto Swap, Cold Swap, and
Warm Swap). See also Hot Replacement of Disks.

In-Line Terminator

A plug attached to the end of a SCSI cable in order to initiate active
termination. Used when SCSI devices on the cable do not have built-in
termination. See also Active Termination.

Manual No. DB11-000024-00 G-13

Interface

A hardware or software protocol that manages the exchange of data between
the hard disk drive and the computer. The most common interfaces for small
computer systems are ATA (advanced technology attachment), also known
as IDE (integrated drive electronics), and SCSI.

Internal RAID Controller

A controller circuit board that resides inside a computer or server. An
internal RAID controller resides on a bus, such as the PCI bus. Examples the
Mylex AcceleRAID and eXtremeRAID families.

Internet

A worldwide system of computers that is a public, cooperative, and self­sustaining facility accessible to tens of millions of users worldwide.

Intranet

A network contained within an enterprise, the main purpose of which is
usually to share company information and computing resources among
employees. An intranet can also be used to facilitate working in groups and
for teleconferences.

I/O

Input/Output, the transmission of information between an external source
and the computer.

I/O Bottleneck

Any resource in the I/O path whose performance limits the performance of a
storage or I/O system.

I/O Bus

Any path used for the transfer of data and control information between I/O
adapters and storage controllers or storage devices. See also Bus.

G-14 AcceleRAID 170LP Installation Guide

Glossary

I2O

Intelligent Input/Output, a driver that uses special I/O processes to eliminate
I/O bottlenecks. The processes deal with interrupt handling, buffering, and
data transfer. An I

which handles higher-level OS details, and a hardware device module
(HDM), which knows how to communicate with certain devices.

O driver also includes an OS-specific module (OSM),

2

ISA

Industry Standard Architecture, a standard bus (computer interconnection)
architecture associated with the IBM® AT® motherboar d. It allows 16 bits
at a time to flow between the motherboard circuitry and an expansion slot
card and its associated device(s).

JBOD

Just A Bunch of Disks (Drives), a number of disk drives, usually in an
enclosure. JBOD implies that the disks do not use RAID technology and
function independently. All Mylex RAID controllers support JBOD mode.
See also RAID Levels.

Jumper

A short piece of electrical conductor encased in plastic used to connect pins
on a device to provide settings that the user can change. The settings remain
constant during operation. For example, jumpers often set SCSI ID,
termination, and IDE master/slave settings.

Kilobyte

210 (1,024). Abbreviated as K or KB.

LAN

Local Area Network, a network of interconnected workstations sharing the
resources of a single processor or server, typically within the area of a small
office building.

Manual No. DB11-000024-00 G-15

Logical Drive

The logical devices presented to the operating system. System drives are
presented as available disk drives, each with a capacity specified by the
Mylex RAID controller.

Logical Drive States

A logical (system) drive can be Online, Critical, or Offline. Notice that the
term “online” is used for both physical and logical drives. See also Storage
Device.

LUN

Logical Unit Number, a SCSI representation of a system drive on a given
channel and target ID. This may be a single device or an array of devices
configured to behave as a single device.

LVD

Low Voltage Differential, a form of SCSI signaling introduced with Ultra2
SCSI (Fast 40 SCSI). LVD uses data high and data low signal lines to

increase transmission distances over those of single-ended (conventional
SCSI signaling) lines. LVD allows for cable lengths of up to 12 meters
(approximately 39 feet) with up to 15 drives. LVD also lowers noise, power
usage, and amplitude.

L VD dif fers from conv entional differential signaling in that only positive and
negative values are distinguished, not voltage levels. Other advantages are
that L VD de vices consume less po wer and can sense single-ended devices on
the bus and revert to single-ended signaling. Devices need to be Ultra2 SCSI
LVD drives in order to take advantage of the LVD signaling. Mylex
AcceleRAID, eXtremeRAID, and DAC FL controllers are LVD controllers.

Megabit

A million bits; used as a common unit of measure, relative to time in
seconds, as an expression of a transmission technology's bandwidth or data
transfer rates (abbreviated as Mb). Megabits per second (Mbps) is a frequent
measure of bandwidth on a transmission medium.

G-16 AcceleRAID 170LP Installation Guide

Glossary

Megabyte

220 (1,048,576) bytes. One megabyte can store more than one million
characters. Abbreviated as M or MB.

Mirrored Cache

A cache memory that has duplicate data from another controller. In the e v ent
of failure of the original controller, the second controller can tak e the cached
data and place it on the disk array.

Mirrored Hard Drive

Two hard drives the computer sees as one unit. Information is stored
simultaneously on each drive. If one hard disk drive fails, the other contains
all of the cached data and the system can continue operating.

Mirroring

The complete duplication of data on one disk drive to another disk drive, this
duplication occurs simultaneously with each write operation: each disk will
be the mirror image of the other (also known as RAID Level 1, see RAID
Levels). All Mylex RAID controllers support mirroring.

M.O.R.E.™

Mylex Online RAID Expansion, an advanced configuration mode that
allows expansion of any unconfigured or hot spare drive into the expandable
drive group while the controller is online with the host. For example, a
system using a five-disk-driv e RAID set can add another disk drive to create
a six-disk-drive RAID set. The M.O.R.E. operation can be performed on all
RAID levels except JBOD.

Mylex’s Global Array Manager (GAM) supports two M.O.R.E. features:

• Expand Capacity allows logical drive expansion for FFx external
controllers only.

• Expand Array allows array expansion for both PCI and FFx external
controllers.

Manual No. DB11-000024-00 G-17

During the RAID set expansion process, which includes re-striping data
from the old (smaller) RAID set to the new (expanded) RAID set, the
controller continues to service host I/O requests.

MTBF

Mean Time Between Failures, the av erage time from start of use to failure in
a large population of identical systems, computers, or devices.

MTDL

Mean Time until Data Loss, the average time from startup until a component
failure causes a permanent loss of user data in a large population of disk
arrays.

Narrow SCSI

8-bit wide standard SCSI. Compare with Fast SCSI, Fast/Wide SCSI, Ultra
SCSI (Fast 20 SCSI), Ultra Wide SCSI, Ultra2 SCSI (Fast 40 SCSI),
Ultra160 SCSI (Ultra3 SCSI), and Wide SCSI.

NOS

Network Operating System, an operating system that has special features for
connecting computers and peripheral devices into a LAN.

NVRAM

Non-Volatile Random Access Memory, a memory unit equipped with a
battery so that the data stays intact even after the main power had been
switched off.

Offline

A Logical Drive is in an “offline” state if no data can be read from it or
written to it. Offline does not apply to physical disk drives. System
commands issued to offline logical drives are returned with an error status;
no operations can be performed on offline logical drives. See also Logical
Drive States, Critical State, and Online.

G-18 AcceleRAID 170LP Installation Guide

Glossary

Online

A Logical Drive is in an “online” state if all of its participating SCSI drives
have power and are operational. See also Logical Drive States, Critical State,
and Offline.

Partitioning

Where the full usable storage capacity of a disk or array of disks appears to
an operating environment in the form of several virtual disks whose entire
capacity approximates that of the underlying disk or array.

PCB

Printed Circuit Board, also called cards or adapters, a thin plate consisting of
chips and other electronic components.

PCI

Peripheral Component Interconnect, a standardized architecture that
provides a high-speed data path between peripherals and the CPU. PCI is a
high-performance, backplane interface, expansion slot architecture found on
PC, Macintosh, and UNIX workstations. PCI cards are portable across
hardware platforms with the help of various software drivers.

PCI Hot Plug

A feature that allows for the printed circuit board (PCB) to be replaced
without powering down the entire system—an essential feature in newer
PCI-based PCs. Mylex DAC960PG, DAC960PJ, AcceleRAID, and
eXtremeRAID products are all PCI Hot Plug compatible. See also Hot Plug.

Peripheral

Any computer device that is not part of the essential computer , b ut is situated
relatively close by.

Physical Device

Any device connected to some kind of hardware. For example, SCSI disk,
fibre disk, network disk, RAM disk, etc.

Manual No. DB11-000024-00 G-19

Physical Disk Drive

A single hard disk drive. Each physical disk drive is assigned a unique
identification address.

Platform

An underlying computer system on which application programs can run. A
platform consists of an operating system, the computer system's
coordinating program, and a microprocessor, the microchip in the computer
that performs logic operations and manages data movement in the computer.

Plug and Play

The ability to install peripheral cards or other devices without requiring
manual configuration by the user.

RAID

Redundant Array of Independent Disks, a collection of two or more disks
working together in an array. Mylex RAID controllers implement this
technology to connect up to 15 SCSI devices per channel. The different
forms of RAID implementation are known as “RAID levels.” See also
Berkeley RAID Leve ls, Disk Array, and RAID Levels.

The system manager or integrator selects the appropriate RAID level for a
system. This decision will be based on which of the following are to be
emphasized:

• Disk Capacity

• Data Availability (redundancy or fault tolerance)

• Disk Performance

RAID Adapters

See RAID Controller

RAID Advisory Board (RAB)

An association of companies whose primary intention is to standardize
RAID storage systems. Mylex is a member of RAB.

G-20 AcceleRAID 170LP Installation Guide

Glossary

RAID Controller

Low cost RAID controllers that use SCSI channels on the motherboard.

RAID Levels

Mylex disk array controllers support four RAID Advisory Board approved
(RAID 0, RAID 1, RAID 3, and RAID 5), two special (RAID 0+1, and
JBOD), and three spanned (RAID 10, 30, and 50) RAID levels. All DA C960,
AcceleRAID, and eXtremeRAID series controllers support these RAID
levels. See also Berkeley RAID Levels.

Level 0: Provides block “striping” across multiple drives, yielding higher
performance than is possible with individual drives. This level does not
provide any redundancy.

Level 1: Drives are paired and mirrored. All data is 100 percent duplicated
on a drive of equivalent size.

Level 3: Data is “striped” across several physical drives. Maintains parity
information which can be used for data recovery.

Level 5: Data is “striped” across several physical drives. For data
redundancy, drives are encoded with rotated XOR redundancy.

Level 0+1: Combines RAID 0 striping and RAID 1 mirroring. This level
provides redundancy through mirroring.

JBOD: Sometimes referred to as “Just a Bunch of Drives.” Each drive is
operated independently like a normal disk controller, or drives may be
spanned and seen as a single drive. This level does not provide data
redundancy.

Level 10: Combines RAID 0 striping and RAID 1 mirroring spanned across
multiple drive groups (super drive group). This level provides redundancy
through mirroring and better performance than Level 1 alone.

Level 30: Data is “striped” across multiple drive groups (super drive group).
Maintains parity information, which can be used for data recovery.

Level 50: Data is “striped” across multiple drive groups (super drive group).
For data redundancy, drives are encoded with rotated XOR redundancy.

Manual No. DB11-000024-00 G-21

Note: The host operating system drivers and software utilities remain
unchanged regardless of the level of RAID installed. The controller makes
the physical configuration and RAID level implementation.

RAID Migration

A feature in RAID subsystems that allows for changing a RAID level to
another level without powering down the system.

Rebuild

The process of reconstructing data from a failed disk using data from other
drives.

Redundancy

The inclusion of extra components of a given type in a system (beyond those
the system requires to carry out its functions).

Replacement Table

A table that contains information regarding which SCSI devices have been
replaced by others through standby replacement.

RISC

Reduced Instruction Set Computing, architecture for an application-specific
processor.

RJ-11, RJ-45

Registered Jacks (sometimes described as RJ-XX), a series of telephone
connection interfaces (receptacle and plug) that are registered with the U.S.
Federal Communications Commission (FCC). The most common telephone
jack is the RJ-11 jack, which can have six conductors but is usually
implemented with four. The RJ-11 jack is likely to be the jack that your
household or office phones are plugged into from the ordinary “untwisted”
wire (sometimes called “gray satin” or “flat wire”) that people are most
familiar with. The RJ-45 is a single-line jack for digital transmission over
ordinary phone wire, either untwisted or twisted; the interface has eight pins
or positions.

G-22 AcceleRAID 170LP Installation Guide

Glossary

Rotated XOR Redundancy

XOR refers to the Boolean “Exclusive-OR” operator . Also kno wn as Parity, a
method of providing complete data redundancy while requiring only a
fraction of the storage capacity of mirroring. In a system configured under
RAID 3 or RAID 5 (which require at least three SCSI drives), all data and
parity blocks are divided amongst the drives in such a way that if any single
drive is removed (or fails), the data on it can be reconstructed using the data
on the remaining drives. In any RAID 3 or RAID 5 array, the capacity
allocated to redundancy is the equivalent of one drive.

RS-232C

Recommended Standard-232 revision C, a long-established standard that
describes the physical interface and protocol for relatively low-speed serial
data communication between computers and related devices. RS-232C is the
interface that a computer uses to talk to and exchange data with your modem
and other serial devices. It is an asynchronous 9 or 25-pin connector.

RS 422/423

Recommended Standard 422/423, a 32-pin serial connector that can be used
for either synchronous or asynchronous transmission of data. The 422 is a
differential line; the 423 is a single line.

RTC

Real-Time Clock, a clock that keeps track of the time with its own power
supply.

SAF-TE

SCSI Accessed Fault-Tolerant Enclosure, an “open” specification designed
to provide a comprehensive standardized method to monitor and report
status information on the condition of disk drives, power supplies, and
cooling systems used in high availability LAN servers and storage
subsystems. The specification is independent of hardware I/O cabling,
operating systems, server platforms, and RAID implementation because the
enclosure itself is treated as simply another device on the SCSI bus. Many
other leading server, storage, and RAID controller manufacturers w orldwide

Manual No. DB11-000024-00 G-23

have endorsed the SAF-TE specification. Products compliant with the SAF­TE specification will reduce the cost of managing storage enclosures,
making it easier for a LAN administrator to obtain base-level fault-tolerant
alert notification and status information. All Mylex RAID controllers feature
SAF-TE.

SAN

See Storage Area Network

SCA

Single Connector Attachment, a type of interface designed to provide a
standard connection, such as connection pins for power cables and data
wires, for systems using hot swappable drives. It includes data channel,
power, and ID configuration all in one connector. SCA drives connect to a
SCSI backplane that provides power and configuration settings, such as
SCSI IDE (integrated drive electronics), and termination of the SCSI bus.

SCSI

Small Computer System Interface, a technological standard that defines
connections between computers and peripheral devices.

SCSI Adapters

Storage controllers for managing SCSI devices.

SCSI Drive

A disk drive equipped with a SCSI interface (sometimes referred to as a
SCSI Disk). Each disk drive will be assigned a SCSI address (or SCSI ID),
which is a number from 0 to 7 (0 to 15 under wide or Ultra SCSI). The SCSI
address uniquely identifies the drive on the SCSI bus or channel.

SCSI Drive States

Refers to a SCSI drive’ s current operational status. At any gi ven time, a SCSI
drive can be in one of five states: Ready, Online, Standby, Dead, or Rebuild.

The controller stores the state of the attached SCSI driv es in its non-volatile

G-24 AcceleRAID 170LP Installation Guide

Glossary

memory. This information is retained ev en after power-off. Hence, if a SCSI
disk is labeled “dead” in one session, it will stay in the “dead” state until a
change is made either by using a system level utility or after a rebuild. Each
state is described below.

Ready: A SCSI disk drive is in a “ready” state if it is powered on and is
available to be configured during the current session but remains
unconfigured.

Online: A SCSI disk drive is in an “online” state if is powered on, has been
defined as a member of a drive group, and is operating properly.

Standby: A SCSI disk drive is in a “standby” state if it is powered on, is able
to operate properly, and was

Dead: A SCSI disk drive is in a “dead” state if it is not present, if it is present
but not powered on, or if it failed to operate properly and was “killed” by the
controller. When the controller detects a failure on a disk, it “kills” that disk
by changing its state to “dead.” A “dead” SCSI driv e can also be present and
powered on, but a SCSI dri ve in a “dead” state does not participate in any I/O
activity; no commands are issued to dead drives.

Rebuild: A SCSI disk drive is in a “reb uild” s tate while it is in the process of
being rebuilt. During this process, data is regenerated and written to the disk
drive. This state is also referred to as “Write-Only (WRO).”

NOT defined as part of any drive group.

SCSI Interrupt Steering Logic (SISL)

Architecture that allows a RAID controller, such as AcceleRAID 150, 200 or
250, to implement RAID on a system board-embedded SCSI bus or a set of
SCSI busses.

Server

A computer program that provides and manages services to other computer
programs on the same or other computers. The computer that a server
program runs on is also frequently referred to as a server. See also
Application Server.

SES

SCSI Enclosure Services, a standard for SCSI access to services within an

Manual No. DB11-000024-00 G-25

enclosure containing one or more SCSI devices. For disk drives, power
supplies, cooling elements, and temperature sensors, the actions performed
are the same as for SAF-TE monitoring. If a UPS is connected to any SES­monitored enclosures, and an AC failure or two minute warning is reported,
conservative cache is enabled and all system drives are switched to write­through cache. Primarily used in fibre enclosures.

SIMM

Single In-line Memory Module, RAM packed on a small circuit board with a
defined edge connector. Two SIMMs are required for a 64-bit memory path
on a Pentium processor. See also DIMM.

SMART

Self-Monitoring Analysis and Reporting Technology, the industry standard
reliability prediction indicator for both the ATA/IDE (advanced technology
attachment/integrated drive electronics) and SCSI hard disk drives. Hard
disk drives with SMART offer early warning of some hard disk failures so
critical data can be protected.

Standard Disk Drive

This term refers to a hard disk drive with SCSI, IDE, or other interface,
attached to the host system through a standard disk controller.

Standby Replacement of Disk

See also Hot Spare. One of the most important features the RAID controller
provides to achieve automatic, non-stop service with a high degree of fault­tolerance. The controller automatically carries out the rebuild operation
when a SCSI disk drive fails and both of the following conditions are true:

A “standby” SCSI disk drive of identical size is found attached to the same
controller;

All of the system drives that are dependent on the failed disk are redundant
system drives, e.g., RAID 1, RAID 3, RAID 5, and RAID 0+1.

Note: The standby rebuild will only happen on the
never across DAC960 controllers.

G-26 AcceleRAID 170LP Installation Guide

SAME DA C960 controller ,

Glossary

During the automatic rebuild process, system activity continues as normal.
System performance may degrade slightly during the rebuild process.

To use the standby rebuild feature, you should always maintain a standby
SCSI disk in your system. When a disk fails, the standby disk will
automatically replace the failed drive and the data will be reb uilt. The system
administrator can disconnect and remove the bad disk and replace it with a
new disk. The administrator can then make this new disk a standby.

The standby replacement table has a limit of 8 automatic replacements in any
session (from power-on/reset to the next power-off/reset). When the limit of
8 is reached and a disk failure occurs, the standby replacement will occur b ut
will not be recorded in the replacement table.

To clear the “standby replacement” table, reboot the system from a DOS
bootable floppy, run the configuration utility and select the option ‘view/
update configuration’ from the main menu. A red box labeled ‘Drive Remap
List’ will be displayed. Selecting the box will allow you to continue. You
should save the configuration without making any changes, and exit the
configuration utility. This will clear the replacement table. You may now
proceed to boot your system and continue normal operations.

In normal use, the replacement table limit of 8 should not cause any
problems. Assuming that a disk fails about once a year (drives we support
generally come with a 5-year warranty), the system would run continuously
for a minimum of 8 years before the table would need to be cleared.

Storage Area Network (SAN)

A high-speed, open-standard scalable network of storage devices and servers
providing accelerated data access.

Storage Device

A collective term for disks, tape transports, and other mechanisms capable of
non-volatile data storage.

Sub-System Storage

A collection of disks providing data storage space to a system user.

Manual No. DB11-000024-00 G-27

System Disk

The disk on which a system’s operating software is stored.

System Drives

See Logical Drives

Target ID

The SCSI ID of a device attached to a controller. Each SCSI channel can
have up to 15 attached SCSI devices (target ID from 0 to 6 and 8 to 15).

TCP/IP

Transmission Control Protocol/Internet Protocol, the basic communication
language or protocol of the Internet. It can also be used as a communications
protocol in intranets and extranets. When set up with direct access to the
Internet, a computer is provided with a copy of the TCP/IP program just as
every other computer that you may send messages to or get information from
also has a copy of TCP/IP.

Terabyte

A measure of memory capacity, 240 power; or roughly a tho usand billion
bytes (that is, a thousand gigabytes).

Terminator

A part used to end a SCSI bus.

Termination

A method of matching transmission impedance of a bus to eliminate signal
reflections from the physical ends of the bus.

Thin File Server

A small server maximized for the sole purpose of serving files, as opposed to
computing. See also File Server.

G-28 AcceleRAID 170LP Installation Guide

Glossary

TPC-C, Tpm-C

The Transaction Processing Performance Council (TPC) is a standards
organization that measures transaction throughput of systems. One of their
benchmarks is Tpm-C, which reflects price and performance metrics. TPC-C
reflects new order transaction rate, a benchmark for transaction speed.
Mylex products have won consistently high TPC-C results.

Transfer Rate

The rate at which data moves between the host computer and storage, input,
or output devices, usually expressed as a number of characters per second.

Ultra160 SCSI (Ultra3 SCSI)

The newest in SCSI technology, Ultra160 SCSI increases performance,
reliability, and manageability. With transfer rates of 160 MBps, cyclical
redundancy check, and the capability to automatically test the interface’s
performance level, the Ultra160 SCSI can keep up with fibre channel
technology. Compare with Fast SCSI, Fast/Wide SCSI, Narrow SCSI, Ultra

Wide SCSI, Ultra SCSI (Fast 20 SCSI), Ultra2 SCSI (Fast 40 SCSI), and
Wide SCSI.

Ultra SCSI (Fast 20 SCSI)

A high performance SCSI protocol that has a bus speed of 20 Megabytes per
second in the Narrow SCSI configuration and 40 MB in the Wide SCSI (Fast
20 Wide SCSI) configuration. Compare with Fast SCSI, Fast/Wide SCSI,

Narrow SCSI, Ult ra Wide SCSI, Ultra2 SCSI (Fast 40 SCSI), Ultra160 SCSI
(Ultra3 SCSI), and Wide SCSI.

Ultra Wide SCSI

16-bit wide Ultra SCSI, double the speed of narrow SCSI. Compare with

Fast SCSI, Fast/Wide SCSI, Ultra SCSI, Ultra2 SCSI, and Ultra160 SCSI
(Ultra3 SCSI), and Wide SCSI.

Ultra2 SCSI (Fast 40 SCSI)

A higher performance SCSI protocol than Ultra SCSI. Ultra2 SCSI has a bus
speed of 40 Megabytes per second in the Narrow SCSI configuration and 80

Manual No. DB11-000024-00 G-29

Megabytes in the Wide SCSI (Wide Ultra2 SCSI) configuration. Compare
with Fast SCSI, Fast/Wide SCSI, Narrow SCSI, Ultra SCSI (Fast 20 SCSI),
Ultra Wide SCSI, Ultra 160 SCSI (Ultra3 SCSI), and Wide SCSI.

WAN

Wide Area Network, a geographically broader telecommunication structure
as opposed to a local area network (LAN) that comprises of two or more
LANs. A wide area network may be composed entirely of private structures,
but the term also seems to imply the inclusion of public networks and all
kinds of transmission media.

Warm Swap

The exchange of a defective disk with a working disk while power is
maintained to the system, but I/O operations have ceased. See also
Automatic Swap, Cold Swap, and Hot Swap.

Web

A number of computers, servers, or networks linked together in a matrix. See
also Internet and Intranet.

Wide SCSI

A SCSI protocol and signal definition providing 16-bit wide data path
Compare with Fast SCSI, Fast/Wide SCSI, Narrow SCSI, Ultra SCSI (Fast
20 SCSI), Ultra Wide SCSI, Ultra2 SCSI (F ast 40 SCSI), and Ultra160 SCSI
(Ultra3 SCSI).

Wintel

A computer trade industry term for personal computers based on the Intel®
microprocessor and one of the Windows® operating systems from
Microsoft®. The term “PC” has often been used for this purpose.

XOR

Exclusive “Or”, a computer language function that generates parity in RAID
systems; “

G-30 AcceleRAID 170LP Installation Guide

this or that but not both.”

Glossary

Manual No. DB11-000024-00 G-31

G-32 AcceleRAID 170LP Installation Guide

A

Aborted Installation B–2
AcceleRAID 160 1–1

capabilities 1–3
channels 1–3
features 1–3
operating system support 1–4
product description 1–1
specifications A–1

Automatic circuitry 2–15

B

BIOS

Enable 8 GByte or 2 GByte Drives

3–3

Enable/Disable 3–2

BIOS Configuration Utility 3–4
BIOS Options

setting 3–2

BIOS Options Sequence 3–1

C

Cables 2–12
Cabling 2–18
CD-ROM boot option 3–2
CE

Community of Europe

Declaration of Conformity 1–5
Checklist (for installation) 2–4
Connectors 2–5
Controller Features 1–3
Controller Start-up 3–1

1–6

D

Disabled on-board termination 2–16
Drive channel, Standard 2–15, 2–16
Drive Check Error Messages B–1

E

Enabled on-board termination 2–14,

2–15

Enclosure Management D–1
End device termination 2–14, 2–15
environmental specifications A–2

Error Messages B–1

drive check B–1
start-up B–1
system reboot or power down B–3

F

FCC

Declaration of Conformity 1–4

H

hardware specifications A–1
Hot Plug (PCI) C–1

I

In Case of Problems 3–5
Installation

abort message B–2
Before You Begin 2–2
cables 2–12
Checklist 2–4
controller 2–2
SCSI drives 2–12

Internal drive configuration 2–15

J

Jumper Descriptions 2–7
Jumpers 2–5

L

LED Descriptions 2–6
LEDs 2–5
Logical drives 1–3
LVD Mode 2–18

M

Mixing SCSI Drives 2–19

O

On-board termination, disable 2–16
on-board termination, enable 2–15
Operating System Support 1–4

P

PCI Hot Plug C–1

Implementation C–1
Introduction C–1

Manual No. DB11-000024-00 Index-1

NetWare C–1
Windows 2000 C–3

Windows NT C–3
Physical drives 1–3
Product Description 1–1

R

RAID EzAssist 3–4
RAID levels supported 1–3

S

Safety 2–3
SAF-TE D–1
SCSI cables 2–12
SCSI connector 2–12
SCSI device configuration 2–14
SCSI Device IDs 2–17
SCSI drives 2–19

preparing 2–12
SCSI ID numbers 2–17
SCSI IDs 2–17
SES (SCSI Enclosure System) D–2
Setting Termination 2–12
Single-ended Mode 2–18
Specifications

controller

environmental A–2

hardware A–1
Standard Package Contents 1–5
Standard PCI slot 2–4
Start-up

error messages

overview 3–1

troubleshooting 3–5
System Power Down B–3
System Reboot B–3

A–1

B–1

T

Termination

enabled

2–15

internal and external only 2–15

internal or external only 2–15

low-voltage differential (LVD) 2–

14

single-ended (SE) 2–14
Termination disabled 2–16
Terminator 2–14

U

UL Statement 1–7
User-supplied Items 1–6

Index-2 AcceleRAID 170LP Installation Guide

LSI LOGIC CORPORATION

SOFTWARE LICENSE AND WARRANTY POLICY

Limited Warranty

LSI warrants to the original purchaser of the product enclosed herein
(“Customer”) that (a) for a period of three (3) years from the date of
Customer’s purchase of the Product (excluding batteries and
memory) (the “Product Warranty Period”), and (b) for a period of one
(1) year from the date of purchase of the Product by Customer (the
“Battery/Memory Warranty Period”), the batteries and memory
included in the Product will (i) be free from defects in workmanship
and materials, and (ii) substantially conform to the documentation or
other specifications for the Product. The limited warranties herein
shall not apply to and shall be void for any Product that has been
misused (including static discharge, improper installation, or
accident), abused, modified, damaged a s a result of actions on the
part of Customer or its agents or its processes, unauthorized service
or parts, used in a manner inconsistent with normal computer
operations (including but not limited to electrical irregularities,
lightning or power line related damage, or other abnormal
occurrences), or to normal wear and tear of the Product. The
warranty herein is made to and for the benefit of the original
purchaser of this Product and is non-transferable.

This warranty will not apply to, and LSI provides no warranty for any
BIOS, software, ROM-based firmware or other product developed or
manufactured b y an y third party whether including with this Product or
not. Such warranty or warranties are provided by third parties and, to
the extent permitted thereby, shall be made available and are hereby
assigned by LSI to Customer.

Customer may obtain warranty service during the Product Warranty
Period or Battery/Memory Warranty Period, as the case may be, if (a)
Customer has contacted LSI at the telephone num ber listed LSI’s web
site at www.lsilogic.com to obtain a Returned Material Authorization
(“RMA”) number and appropriate instructions from LSI, (b) after
obtaining LSI’s au thorization, Customer has returned the Product if so
instructed to an authorized LSI service facility or to LSI in accordance

with LSI’s instructions and the terms of this Agreement, shipping
costs to be borne by LSI, and (c) Customer has provided proof of
purchase price and date for unregistered Product. LSI shall bear
one-way shipping, packing and insurance costs and all other costs,
excluding labor and parts, necessary to effectuate repair or
replacement under this warranty. All Product repaired or replaced
under this warranty shall be returned to Customer at Customer’s
expense. Repair or replacement Product provided under this limited
Product warranty will be furnished on an exchange basis and may be
new or reconditioned. All Product returned under this warranty shall
become the property of LSI. LSI shall notify Customer in the event
that the Product returned under the warranty does not, in LSI’s sole
determination, comply with the conditions and requirements set for th
herein and, unless disposition instructions are given by Customer for
the Product within thirty (30) days of such notification, the Product
shall be returned to Customer freight collect.

Warranty Disclaimer
EXCEPT AS SET FORTH IN THIS DOCUMENT, LSI MAKES NO

WARRANTIES, WHETHER EXPRESS, IMPLIED, OR STATUTORY
REGARDING OR RELATING TO THE PRODUCT, OR ANY
MATERIALS OR SERVICES FURNISHED OR PROVIDED TO OEM
UNDER THIS AGREEMENT, INCLUDING MAINTENANCE AND
SUPPORT. LSI SPECIFICALLY DISCLAIMS ALL IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT
TO THE PRODUCT AND ANY OTHER MATERIALS AND
SERVICES, AND WITH RESPECT TO THE USE OF ANY OF THE
FOREGOING.

THE REMEDIES STATED IN THIS DOCUMENT CONSTITUTE
CUSTOMER’S EXCLUSIVE REMEDIES AND LSI’S SOLE
LIABILITY FOR BREACH OF THE LIMITED WARRANTIES SET
FORTH HEREIN.

Software License
Subject to the terms and conditions of this Agreement, LSI grants

Customer a non-exclusive, worldwide, non-transferable, revocable,
royalty-free license to use, perform and display the LSI software that

is a part of the Product (“ LSI Software”) solely as par t of the Produc t
incorporated into the OEM Products that and not on a standalone
basis. Customer may not ( a) sell, lease, license, or sublicense the LSI
Software, (b) de-compile, disassemble, reverse engineer, or
otherwise attempt to derive source code from the LSI Software, in
whole or in part, except to the extent such restriction is prohibited by
applicable law, (c) modify or create derivative works from the LSI
Software, or (d) use the LSI Software to provide processing services
to third parties or otherwise use the LSI Software on a service bureau
basis, electronically distribute or timeshare the LSI Software or
market the LSI Software by interactive cable or remote processing
services.

Limitation of Liability
IN NO EVENT SHALL LSI’S TOTAL, CUMULATIVE LIABILITY

ARISING FROM THE SALE, USE AND DISPOSITION OF THE
PRODUCT AND/OR THE LICENSING OF THE LSI SOFTWARE
EXCEED THE AMOUNT PAID BY CUSTOMER FOR THIS
PRODUCT. IN NO EVENT SHALL LSI BE LIABLE TO CUSTOMER
OR ANY THE OTHER FOR ANY PUNITIVE, INCIDENTAL,
INDIRECT, CONSEQUENTIAL OR SPECIAL DAMAGES,
INCLUDING LOSS OF PROFITS, INCURRED BY THAT PARTY,
HOWEVER CAUSED AND UNDER ANY THEORY OF LIABILITY,
WHETHER BASED IN CONTRACT, TORT (INCLUDING, WITHOUT
LIMITATION, NEGLIGENCE OR PRODUCT LIABILITY) OR
WARRANTY, IN CONNECTION WITH THE SALE, USE AND
DISPOSITION OF THE PRODUCT AND/OR THE LICENSING OF
THE LSI SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.

Manual No. DB11-000024-00
08P5513

LSI Logic Corporation
North American Headquarters
Milpitas, CA

408.433.8000