IBM DU3 2104 Manual

Expandable Storage Plus
2104 Model s DU3 and TU3
Hardware Technical Information
SA33-3309-00

Expandable Storage Plus
2104 Model s DU3 and TU3
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:
THIS PUBLICATION IS PRINTED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
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
construed to mean that such products, programming, or services will be offered in your country. Any reference to a
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
ANSI
1
specification 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:
vAIX
vIBM
vRS/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)
22104 Models DU3 and TU3 Hardware Technical Information

On the back of the backplane are connectors for two fan-and-power-supply
assemblies3, two SCSI interface cards4, and a switch card5.
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

2104 Model TU3
The 2104 Model TU3 is a deskside SCSI disk enclosure that can be attached to any
RS/6000 or IBM server 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 TU3 looks like this:
At the front of a 2104 Model TU3 are 14 device slots 1. In a fully configured 2104
Model TU3, each slot contains a SCSI disk drive module. If a 2104 Model TU3 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 TU3.
Each disk drive module connects to a backplane that is mounted vertically about
halfway between the front and back of the 2104 Model TU3.
The 14 device slots are split 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.
On the back of the backplane are connectors for two fan-and-power-supply
assemblies3, two SCSI interface cards4, and a switch card5.
Figure 3. 2104 Model TU3 from the Front (Left) and Back (Right)
42104 Models DU3 and TU3 Hardware Technical Information

The 2104 Model TU3 can have 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 TU3.
The SCSI interface cards are used to connect host machines to the 2104 Model TU3.
These cards contain logic that provides information about what is happening in the
2104 Model TU3, and controls the operation of the subsystem.
The switch card contains switches that control which SCSI bus mode is selected, how
the 2104 Model TU3 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 TU3.
Chapter 1. Introduction 5

SCSI Disk Drive Modules
Each 2104 Model DU3 or TU3 includes from one to fourteen SCSI disk drive modules.
In your initial order, you can select the capacity of these disk drive modules. Each disk
slot contains either a disk drive module or a dummy module. You can replace any
dummy module with a disk drive module, or any disk drive module with a dummy
module, but there must always be at least one disk drive module in each 2104 disk
enclosure, and every disk slot must contain either a disk drive module or a dummy
module. You can install the additional disk drive modules yourself.
The following IBM disks are allowed:
Nominal capacity Nominal Speed in RPM Feature Number
9.1 GB 10000 6109
18.2 GB 10000 6118
36.4 GB 10000 6136
Please obtain the latest product information from the following IBM Web address:
www.ibm.com/storage
62104 Models DU3 and TU3 Hardware Technical Information

SCSI Interface Cards
Attached to the back of the backplane in a fully configured 2104 Model DU3 or 2104
Model TU3 are two SCSI interface cards. Both cards can be used to connect host
machines to the 2104 disk enclosure. A SCSI interface card provides the following
functions:
vSupports SCSI Enclosure Services at the SCSI node at address 15 on the external
SCSI bus
vReads the Vital Product Data (VPD) for the backplane, the fan-and-power-supply
assembly, the fan assembly, the switch card, the SCSI interface card, and the SCSI
bus bridge card
vInputs the fan-and-power-supply assembly fault lines
vControls the fan-and-power-supply assembly fault LEDs and the fan assembly fault
LED
vControls the fault LED at the front of the 2104 Model DU3 or 2104 Model TU3
vMonitors the EPOW (Early Power-Off Warning) signal from the power supplies, and
passes this information to the disks when needed
vSupports hot plugging of disk drive modules
vDetects and indicates faults within itself
vSupports LVD (low-voltage differential) Ultra3 SCSI (160MB per second data rate)
Note: Single-ended (SE) SCSI is not supported.
The other SCSI interface card detects and indicates only faults within itself. However, if
the first SCSI interface card fails, the second SCSI interface card provides all the
functions previously provided by the other SCSI interface card.
If the 2104 contains only one SCSI interface card, the SCSI interface card provides all
the functions listed above.
Chapter 1. Introduction 7

Fan-and-Power-Supply Assemblies
Attached to the back of the backplane in a fully configured 2104 Model DU3 or 2104
Model TU3 are two fan-and-power-supply assemblies.
Each fan-and-power-supply assembly provides enough power for the 2104, so it is
possible for there to be just one fan-and-power-supply assembly in a 2104. The second
fan-and-power-supply assembly is replaced by a fan assembly. The
fan-and-power-supply assembly provides the power for the fan assembly via the 2104
backplane.
82104 Models DU3 and TU3 Hardware Technical Information

Switch Card
Attached to the back of the backplane in a fully configured 2104 Model DU3 or 2104
Model TU3, the switch card contains switches that control some of the functions of the
2104.
Switches that are accessible from the back of the 2104 are provided to indicate:
vWhether power to the 2104 is turned on or off automatically when the host computer
is switched on or off
vWhether the disk drive modules are started automatically when power to the 2104 is
turned on
vWhether the disk drive modules are all started simultaneously or sequentially
vWhether enclosure services can operate
vWhich enclosure services, ANSI SCSI-3 Enclosure Services (SES) or Conner/Intel
SCSI-accessed Fault-tolerant Enclosures (SAF-TE), can operate
vThe ID of the 2104
Switches that are accessible only when the switch card has been removed from the
2104 are provided to indicate:
vThat the order of the SCSI addresses is reversed
vWhether the setting of the LEDs is for a rack-mounted unit or for a deskside unit
vWhether the 2104 is configured as single SCSI bus mode or dual SCSI bus mode
Chapter 1. Introduction 9

SCSI Bus Bridge Card
Located centrally in the front of a 2104 Model DU3 or 2104 Model TU3, the SCSI bus
bridge card controls the SCSI bus configuration of the 2104. It assigns the disk drive
modules to a SCSI bus, in accordance with the setting of the SCSI bus split switch on
the switch card.
SCSI Bus Configurations
There are three valid configurations :
vSingle bus, one initiator (SCSI ID 7), 14 disk drive modules (SCSI IDs 0 through 6,
and 8 through 14)
vSingle bus, two initiators (SCSI IDs 5 and 6), 12 disk drive modules (SCSI IDs 0
through 4, and 8 through 14)
Note: In this configuration, slots 6 and 7 (SCSI ID 5 and 6) contain dummy disk
drive modules. SCSI ID 7 is reserved.
vDual bus, two initiators (SCSI IDs 7 (x2)), 2 groups of 7 disk drive modules (SCSI
IDs 0 through 6, and 8 through 14)
Terminator Terminator
Backplane
Terminator
Host bus adapter (HBA)
ID:7
Terminators
14 disk drive modules
Repeater
SCSI bus
bridge card
Enclosure
service
processor
Repeater
SCSI
interface
card
0123456 891011121314
Figure 4. Single Bus, One Initiator, 14 Disk Drive Modules
10 2104 Models DU3 and TU3 Hardware Technical Information

Notes:
1. The two Host Bus Adapters cannot have the same SCSI address.
2. Disk drive slots 6 and 7 (SCSI IDs 5 and 6) have dummy disk drive modules
installed in them.
Note: In this configuration, SCSI addresses 5 and 6 cannot be used for disk drive
modules.
Terminator Terminator
Backplane
Terminator Terminator
Terminators
12 disk drive modules
Repeater Repeater
Enclosure
service
processor
SCSI bus
bridge card
Enclosure
service
processor
Repeater
SCSI
interface
card
SCSI
interface
card
Host bus adapter (HBA)
ID:5 or 6 Host bus adapter (HBA) ID:6 or 5
01234XX 891011121314
Figure 5. Single Bus, Two Initiators, 12 Disk Drive Modules
Chapter 1. Introduction 11

Terminator Terminator
Backplane
Terminator Terminator
SCSI
interface
card
SCSI
interface
card
Host bus adapter (HBA)
ID:7 Host bus adapter (HBA) ID:7
Terminators
7 disk drive modules 7 disk drive modules
Repeater Repeater
Enclosure
service
processor
SCSI bus
bridge card
Enclosure
service
processor
Repeater
0123456 891011121314
Figure 6. Dual Bus, Two Initiators, 14 (2 x 7) Disk Drive Modules
12 2104 Models DU3 and TU3 Hardware Technical Information