IBM DU3 2104, TU3 2104 Hardware Technical Information
Expan dabl e Storage Plus
210 4 Model s DU3 and TU 3
Hardware Technical Information
SA33-3309-00
Expan dabl e Storage Plus
210 4 Model s DU3 and TU 3
Hardware Technical Information
SA33-3309-00
First Edition (October 2000)
The following paragraph does not apply to any country where such provisions are inconsistent with local law:
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
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therefore, this statement may not apply to you.
This publication could contain technical inaccuracies or typographical errors. Changes are periodically made to the
information herein; these changes will be incorporated in new editions of the publication.
It is possible that this publication may contain reference to, or information about, products (machines and programs),
programming, or services that are not announced in your country. Such references or information must not be
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licensed program in this publication is not intended to state or imply that you can use only the licensed program
indicated. You can use any functionally equivalent program instead.
© Copyright International Business Machines Corporation, 2000. All rights reserved.
Note to U.S. Government Users – Documentation related to restricted rights – Use, duplication, or disclosure is subject
to restrictions set forth in the GSA ADP Schedule Contract.
Contents
About This Book .......................v
Related Publications ......................v
Trademarks ........................v
Chapter 1. Introduction .....................1
2104 Model DU3 .......................2
2104 Model TU3........................4
SCSI Disk Drive Modules.....................6
SCSI Interface Cards ......................7
Fan-and-Power-Supply Assemblies .................8
Switch Card .........................9
SCSI Bus Bridge Card .....................10
SCSI Bus Configurations ...................10
Chapter 2. Product Characteristics ................13
Dimensions .........................13
Weight ..........................13
Service Clearances ......................13
Environment ........................14
Temperature and Humidity ...................14
Altitude .........................14
Heat Output, Airflow, and Cooling .................15
Electrical Power .......................16
Input-voltage Requirements ..................16
Power Input ........................16
Power Factor .......................17
Output Protection ......................17
Early Power-Off Warning (EPOW) ................17
Power Control ........................18
Power Sequencing .....................18
Auto Restart .......................18
Safety Approvals .......................19
Electromagnetic Compatibility ...................20
Federal Communications Commission (FCC) Statement .........20
Japanese Voluntary Control Council for Interference (VCCI) Statement ....20
Korean Government Ministry of Communication (MOC) Statement......20
New Zealand Compliance Statement ...............20
International Electrotechnical Commission (IEC) Statement ........20
Avis de conformitéàla réglementation d’Industrie Canada ........20
Industry Canada Compliance Statement ..............21
United Kingdom Telecommunications Requirements ..........21
European Union (EU) Statement .................21
Radio Protection for Germany ..................21
Taiwan Class A Compliance Statement ...............22
Chapter 3. Physical Connections .................23
SCSI Adapters and Cables ....................25
iii
Mainline-Power Connectors ...................26
iv 2104 Models DU3 and TU3 Hardware Technical Information
About This Book
This book is intended for system designers, programmers, engineers, and other
professionals who need to understand the 2104 Models DU3 and TU3.
Chapter 1 contains an introduction and general information about the components of
the 2104 Models DU3 and TU3.
Chapter 2 contains a summary of the physical characteristics of the 2104 Models DU3
and TU3.
Chapter 3 contains information about the external connectors of the 2104 Models DU3
and TU3.
Related Publications
ANSI1specification SCSI/2 X3T9.2/86-109 revision 10H
ANSI specification X3.131-199X
Site and Hardware Planning Information, SA38-0508
Adapters, Devices, and Cables Information for Multiple Bus Systems, SA38-0516
Expandable Storage Plus : 2104 Models DU3 and TU3 Operator’s Guide,
SA33-3310
Expandable Storage Plus : 2104 Model DU3 Installation Guide, GA33-3311
Expandable Storage Plus : 2104 Model TU3 Installation Guide, GA33-3312
Expandable Storage Plus : 2104 Models DU3 and TU3 Service Guide, GY33-0198
Trademarks
The following items are trademarks of International Business Machines Corporation in
the United States, or other countries, or both:
v AIX
v IBM
v RS/6000
v
TM
1. American National Standards Institute.
v
vi 2104 Models DU3 and TU3 Hardware Technical Information
Chapter 1. Introduction
This section describes the 2104 Models DU3 and TU3 and their components.
Figure 1. 2104 Model TU3 (on the Left) and 2104 Model DU3 (on the Right)
1
2104 Model DU3
The 2104 Model DU3 is a rack-mounted SCSI disk enclosure that can be attached to
any RS/6000 or IBM
™
server
TM
™
pSeries computer that provides support for any of
the Small Computer System Interface (SCSI) adapters listed in “SCSI Adapters and
Cables” on page 25.
A fully configured 2104 Model DU3 looks like this:
At the front of a 2104 Model DU3 there are 14 device slots 1. In a fully configured
2104 Model DU3, each slot contains a SCSI disk drive module. If a 2104 Model DU3 is
not fully configured, each slot that does not contain a SCSI disk drive module must
contain a dummy module.
Note: At least one SCSI disk drive module must be present in each 2104 Model DU3.
Each disk drive module connects to a backplane that is mounted vertically about
halfway between the front and back of the 2104 Model DU3.
The 14 device slots are divided into two groups of seven slots. Between the two groups
of slots there is a SCSI bus bridge card 2. The SCSI bus bridge card assigns the disk
drive modules to a SCSI bus, in accordance with the setting of the SCSI bus split
switch on the switch card.
Figure 2. 2104 Model DU3 from the Front (Top) and Back (Bottom)
2 2104 Models DU3 and TU3 Hardware Technical Information
On the back of the backplane are connectors for two fan-and-power-supply
assemblies3, two SCSI interface cards4, and a switch card5.
The 2104 Model DU3 has either two fan-and-power-supply assemblies or one
fan-and-power-supply assembly and one fan assembly. Either option provides all the
necessary power and cooling for the 2104 Model DU3.
The SCSI interface cards are used to connect host machines to the 2104 Model DU3.
These cards contain logic that provides information about what is happening in the
2104 Model DU3 and the status of components within it.
The switch card contains switches that control which SCSI bus mode is selected, how
the 2104 Model DU3 is supplied with power, and what enclosure services are enabled.
It also contains a rotary switch that is used to set the ID of the 2104 Model DU3.
Chapter 1. Introduction 3
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