Seagate BARRACUDA 9 Installation Manual

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BARRACUDA 9

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Disc D rive

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ST19 171N/W/WD /WC/DC

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Installation Guide

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Contents

Preface ........................................................................................1

Electro static discharge protection................... .............................1

Imp ortant safety informatio n and pre cautions ................ ..............2

Wichtige Sicherheitshinweise ......................................................4

European Union Complia nce.......................................................8

Technical support services.................................. ...................... ..9

General description ....... .............................................................11

Initial setup information......... ..... .......................... ........ ..... .........16

Kühlung des Systems................................................................21

Installati on des Laufwerkes

und Anschluß der Kabel..........................................................23

N drives section .........................................................................28

W/WD drives section .................................... ...................... .......32

WC/DC drives sectio n. ...............................................................37

©1995 Seagate Technology, Inc. All rights reserved
Publicatio n Number: 83329020, Rev. A
February 1996

Seagate®, Seagate Technology®, and the Seagate logo are reg­istered trademarks of Seagate Technology, Inc. Barracuda™,
SeaFAX™, SeaFONE™, SeaTDD™, and SeaBOARD™ are
trademarks of Seagate Technology, Inc.

Apple and Macintosh are registered trademarks of Apple Com­puter, Inc. Other product names are registered trademarks or
trademarks of their owners.

No part of this publication may be reproduced in any form without
written permission from Seagate Technology, Inc.

Barracuda 9 Installation Guide, Rev. A 1

Preface

This manual contains information for users of the Seagate®
ST19171 Barracuda™ 9 SCSI disc drives. It provides support
services, performance specifications, and initial setup informa­tion. Additional informat ion is availa ble in the

uct Manual

(part number 83329030). Contact your Seagate

Barra cuda 9 Prod-

sales representative if you need to order this publication.

Electros tatic disch arge p rotecti on

Caution. Removal of circuit boards by personnel not perform-

ing depot repair will damage components and may
void the warranty.

All drive el ectronic assemblies ar e sensitive to static electricity,
due to the electrostatically sensitive devices used within the
drive circuitry. Although some devices such as metal-oxide
semiconductors are extremely sensitive, all semiconductors, as
well as some resistors and capacitors, may be damaged or
degraded by exposure to static electricity.

Electrostatic damage to electronic devices may be caused by
the direct discharge of a charged conductor or by exposure to
the static fields surrounding charged objects. To avoid damaging
drive electronic assemblies, observe the following precautions
when installing or servicing the drive:

• Ground yourself to the drive whenever the drive electronics
are or will be exposed. Connect yourself to gro und with a wrist
strap (Seagate part number 12263496). Connection may be
made to any grounded metal assembly. As a general rule,
remember that you and the drive electronics must all be
grounded to avoid potentially damaging static discharges.

2 Barracuda 9 Installation Guide, R ev. A

• Turn off the power bef ore removing or installi n g the DC power
cable.

• Do not remove any circuit boards from the drive.

• Never use an ohmmeter on any cir cui t boards.

• When installing the drive on a carrier or tray, discharge the
carrier or tray prior to inserting it into the system.

Impo rtant safety inform ati on and precau tion s

Caution. Use forced-air ventilation when bench-testing the

drive to ensure pr oper cooling of drive components.

Use proper safety and repair techniques for safe, reliable opera­tion of this unit. Service should be done only by qualified per­sons. We recommend the procedures in this manual as effective
ways of servicing the unit. Some procedures require the use of
special tools. For proper maintenance and safety, y ou must use
these tools as recommended.

The procedures in this manual and labels on the unit contain
warnings and cautions that must be carefully read and follow ed
to minimize or eliminat e the risk of personal injury. The warnings
point out conditio ns or practices that may endanger you or oth­ers. The cautions point out conditions or practices that may dam­age the unit, possibly making it unsafe for use.

These warnings and cautions are not exhaustive. We cannot
possibly know, evaluate, and advise you of all the wa ys in which
maintenance might be performed or the possible risk of each
technique. Consequently, we have not completed any such
broad evaluation. If you use a non-approved procedure or tool,
first ensure that the method you choose will not risk either your
safety or unit performance.

Barracuda 9 Installation Guide, Rev. A 3
Always observe the following warnings and pre cautions:

• Perform all maintenance by following the procedures in this
manual.

• Follow all cautions and warnings in the procedures.

• Use sound safety practices when operating or repairing the
unit.

• Use caution when troubleshooting a unit that has voltages
present. Turn off power to the unit before servicing it.

• Wear safety shoes when removing or replacing heavy parts.

• Ensure that the internal temperature of the rack or cabinet
does not exceed the limits defined for the drive w hen the drive
is mounted in an equipment rack or cabinet. When units are
stacked vertically, pay special attention to the top where tem­peratures are usually highest.

• Follow the precautions listed above in “Electr ostatic discharge
prote ction.”

• Do not remove any circuit boards from the drive chassis.
Return the entire drive for depot repair if any circuit board is
defective. Removal of circuit boards by personnel not perform­ing depot repair will damage components and may void the
warranty.

• Do not remove the head and disc assembly (HDA) from the
drive chassis. Return the entire drive for depot repair if the
HDA is defective.

• Do not attempt to disassemble the HDA. It is n ot field repair­able. If the sealed HDA is opened by personnel not performing
depot repair, this will damage components and void the
warranty.

4 Barracuda 9 Installation Guide, R ev. A
As a component, this drive i s d esigned to be installed an d oper-

ated in accordance with UL1950, EN60950, CSA C22.2 950­M89, and VDE0805.

Seagate takes all reasonable steps to ensure that its products
are certifiable to currently accepted standards. Typical applica­tions of these disc drives include customer packaging and sub­system de sign. Safety agencies conditionally certi fy component
assemblies, such as the Barracuda disc drive, based on their
final acceptability in the end-use product. The subsystem
designers are responsible for meeting these conditions of
acce p tability in obtaining safety-regulatory agency compliance in
their end-use products and for certifying where required b y law.
A necessary part of meeting safety requirements is the provision
for overcurr ent protection on drive SELV supply voltages.

This unit is a component part and as such is not meant to c omply
with FCC or similar national requirement s as a stand-alone unit.
Engineering radiated emissions test results are available
throu gh the Seagate Safety Department to a ssist the subsystem
designer.

Wichtige Sicherheitshinweise

Vorsicht. Beim Testen des Laufwerks auf dem Prüftisch ist

Fremdbelüftung vorzusehen, um eine ausreichende Kühlung der
Laufwerkkomponenten sicherzustellen.

Verwenden Sie geeignete Sicherheits- und Reparaturverfahren,
um den sicheren, zuverlässigen Betrieb dieser Einheit zu
gewährleisten. Reparaturen dürf en nur von qualifiziertem Fach­personal vorgenommen werd en. Wir empfehlen die Verfahren in
diesem Handbuch als effektive Methoden zur Wartung und Rep-

Barracuda 9 Installation Guide, Rev. A 5
aratur der Einheit. Einige Verfahren erfordern Spezial-

werkzeuge; diese müssen zur sachgemäßen Ausführung der
Wartungsarbeiten und aus Sicherheitsgründen den Empfehlun­gen entsprechend verwendet werden.

Die Verfahren in diesem Handbuch und die Aufkleber auf dem
Gerät enthalten Warn- und Vorsichtshinweise. Diese Hinweise
sind sorgfältig durchzulesen und zu beachten, um das Risiko
von Verletzungen auf ein Mindestmaß zu beschränken oder
ganz zu vermeiden. Die Warnhinweise machen auf Situationen
oder Praktiken aufmerksam, die Sie oder andere gefährden
könnten. Die Vorsichtshinweise machen auf Situationen oder
Praktiken aufmerksam, die Einheit beschädigen können, so daß
deren Gebrauch mit Risiko behaftet ist.

Die Warn- und Vorsichts hinweise sind nicht allumfa ssend! Es ist
uns einfach nicht möglich, alle Wartungsmethoden oder die
eventuellen Risiken jeder Methode zu kennen, zu beurteilen und
Sie entsprechend zu beraten. Aus diesem Grund haben wir auf
eine derartige umfassende Beurteilung verzichtet. Falls Sie ein
hier nicht beschriebenes Verfahren oder Werkzeug verwenden,
stellen Sie zuerst sich er, daß das gewählte Verfahren weder Ihre
persönliche Sicherheit no ch die Leistung der Einheit gefährdet.

Beachten Sie in jedem Fall die folgenden Warn-und Vorsicht­shinweise:

• Führen Sie alle Wartungsarbeiten entsprechend den
Anweisungen in diesem Handbuch aus.

• Beachten Sie alle Warn- und Vorsichtshinweise in diesem
Handbuch.

• Treffen Sie beim Betrieb oder bei der Reparatur der Einheit
angemessene Sicherheitsvorkehrungen.

6 Barracuda 9 Installation Guide, R ev. A

• Wenn eine Einheit unter Spannung steht, gehen Sie bei der
Fehlerdiagnose besonders vorsichtig vor. Schalten Sie die
Einheit aus, bevor Sie mit den Reparaturarbeiten beginnen.

• Tragen Sie Sicherheitsschuhe, wenn Sie schwere Teile aus­bzw. einbauen.

• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse
montiert i st, sorgen Sie dafür, daß die Temperatur im Inneren
des Gestells oder Gehäuses die für das Laufwerk vorgege­benen Grenzwerte nicht übersteigt. Wenn Einheiten vertikal
übereinander betestigt werden, achten Sie b esonders auf den
oberen Stapelbereich, da dort die Temperatur gewöhnlich am
höchsten ist.

• Befolgen Sie die oben unter “Electrostatic Discharge Protec­tion” angegebenen Sicherheitsmaßnahmen.

• Nehmen Sie keine Platinen aus dem Laufwerkgehäuse. We nn
eine Platine defekt ist, muß das gesamte Laufwerk zur Rep­aratur eingeschickt werden. Die Herausnahme von Platinen
durch andere Personen als die für die werkseitige Reparatur
zuständigen kann zu einer Beschädigung der Komponenten
und Erlöschen des Garantieanspruchs führen.

• Die vormontierte Kopf- und Festplatteneinheit (HDA) nicht aus
dem Laufwerkgehäuse nehmen! F alls die HDA beschädigt ist,
schicken Sie das gesamte Laufwerk zur Reparatur ein.

• Die HDA ist nicht vor Ort reparierbar und darf nicht auseinan­dergenommen werden! Öffnen der versiegelten HDA durch
andere Personen als die für die werkseitige Reparatur zustän­digen hat eine Beschädigung der Komponenten und
Erlöschen des Garantieanspruchs zur Folge.

Barracuda 9 Installation Guide, Rev. A 7
Als Teilkom ponente ist dieses Laufw erk für die Inst allation und

den Betrieb in Übereinstimmung mit UL 1950, EN60950, CSA
C22.2 950-M89 und VDE0805 vorgesehen.

Seagate i st st ändig bemüht, die Zulassungsfähigkeit von
Sea gate-Pro dukten im R ahmen d er gegenw ärtig gel tenden
Standards zu gewährleisten. Zu den typischen Anwendungen
dieser F estplattenwerke zählen Systemeinbau durch den
Kun den un d die Konst ruktio n von Untersystemen. Sicherheits­behörden gewähren eine bedingt e Zulassung für K omponenten
wie d as Barracud a-Festplattenlaufwe rk vorbehalt lich der
endgültigen Zulasssung im Endprodukt. Designer von Untersys­temen sind dafür verantwortlich, die Voraussetzungen für die
Einh altung sich erhei ts- oder a ufsichts behördl icher Vor schrifte n
in ihren Endprodukten un d - falls gesetzlich vorgeschrieben - für
die Zul assun g zu schaf fen. Ei ne Gru ndvora ussetzun g zur Ein­halt ung der Sicher heitsan forderung en ist die Be reitstellung
eine s Überlasts chutzes für di e SELV-Verso rgungsspannungen
des Laufwerks.

Dieses G erät ist ei ne Baugr uppe und unterl iegt als solche ni cht
den Anforderungen der FCC oder ähnlicher nationaler Behörden
für eig enstän dige Ger äte. Techn ische Test ergebni sse zu elek­tromagnetische St rahl ung sind für Designer von Untersystem en
auf A nfrage von der Seagate-Sicherheitsabteilung erhältlich.

8 Barracuda 9 Installation Guide, R ev. A

Eur opean Uni on Com pli ance

If this model has the CE Marking, it complies with the European
Union requirements of the Electromagnetic Compatibili ty Direc­tive 89/336/EEC of 03 May 1989 as amended by Directive 92/
31/EEC of 28 April 1992 and Directive 93/68/EEC of 22 July

1993.

Seagate uses an independent laboratory to confi rm compliance
to the above directives. The drive was tested in a representative
system for typical a pplications. T he selected system repre sents
the most popular characteristics for test platforms. The system
configurations include:

• 486, Pentium, and PowerPC Microprocessors

• 3.5-inch Floppy Disc Drive

• Keyboard

• Monitor/D i spla y

Although the test system with this Seagate model complies to
the directives, we cannot guarantee that all systems will comply.
The computer manufacturer or system integrator shall confirm
EMC compliance and provide CE Markin g for their product.

Barracuda 9 Installation Guide, Rev. A 9

Technical support services

Seagate Technology provides technical support literature and
diagnostic utilities to authorized distributors. Please contact your
dealer for technical support and installation troubleshooting.
Pro duct technical support is available for all Seagate products by
calling the SeaFAX™, SeaFONE™, SeaTDD™, or Sea­BOARD™ services. These are toll calls if you dial from outside
of the number’s local dialing area. Seagate also has a forum on
CompuServe and an internet web si te.

SeaFAX : USA [phone]; Englan d 44-62-847-7080

Use a touch-tone telephone to access Seagate’s automated
FAX system and select technical support information by return
FAX. This service is available 24 hours a day, 7 days a week.

Com pu Se rve forum

Online support for Seagate products is available on Com­puServe. This includes an extensive question and a nswer mes­sage base, downloadable utilities, and documentation files in
Adobe

TM

AcrobatTM format which you can download and view
from your own computer. Type “Go Seagate” to access this
service.

SeaFONE: [phone]

Technical support specialists are available from 8:00 A.M. to
5:00

P.M. PST, Monday through Friday. Recorded technical

informatio n on selected Seagate products is provided while you
are on hold. Recordin gs are accessible 24 hours a day, 7 days a
week.

10 Barracuda 9 Installation Guide, Rev. A

SeaTDD: [phone]

TDD is a telecommunication device for the deaf where two peo­ple can communicate using a keyboard connected to the phone
line. A TDD device is required to access this service, which is
available from 8:00

A.M. to 5:00 P.M. PST, Monday through

Friday.

SeaBOARD

The Seagate Technical Support Bulletin Board System (BBS) is
available 24 hours a day, 7 days a week. A modem is required to
access this service. The communications software must be set
for eight data bits, no parity, and one stop bit (8N1). These oper­ate at 300 to 9600 baud. With this service you can access:

• Specifications and jumper configurations

• Reprints of documentation

• Utilities th at you can download to your own computer

SeaBOARD Loc atio n Mod em num ber

USA, Mexico, Latin America........................[phone]

England.......................................................44-62-847-8011

Germany......................................................49-89-140-9331

Singapore....................................................65-292-6973

Australia ................................................. .....61-2-756-2359

Canada........................................................[phone]

France ........... ..............................................33-1- 40-67-1034

Korea........ .. ............................................ .....82-2-556-7294

Internet web site: www .seagate. com

Support services, product information, and much more is pro­vided on this web site.

Barracuda 9 Installation Guide, Rev. A 11

General description

Barracuda 9 SCSI disc drives are high-speed, random-access
digital- data storage devices.

The d rive is a componen t for installa tion in an enclos ure
designed for the drive. This is often a rack within the system or
an external enclosure designed to hous e one or more disc d rives
or other peripher al units. In either case, the disc drive must
receive adequate cooling (refer to “Pro viding a d equate cooling”)
and it must be sufficiently grounded and shielded from emis­sions. The

83329030) contains guidelines for a properly designed
enclosure.

Barracuda 9 Product Manual

(part number

DC Power

Pin 1

Connector

Pin 1

J1

SCSI I/O

Connector

Figure 1. Barracuda 9 disc drive

(N model shown)

J2

J6

12 Barracuda 9 Installation Guide, Rev. A

Characteristics ST19171

Interface UltraSCSI
Capacity

Unformatted 11.7 Gbytes
Formatt e d

2

9.1 Gbytes

Recording

Cylinders (user) 5,273
Read/write data heads 20
Servo heads Embedded

Seek time

3

Average read 9.0 msec
Average writ e 10.5 msec

Disc rotation

RPM 7,200

1

Average latency 4.17 msec

Internal transfer rat e 80 to 124

(Mbits/sec, variable with zone)

Max sync. SCSI tran sfer rate

N 20 Mbytes/sec
W/WD/WC/DC 40 Mbytes/sec

Multi-segmented cache 512 Kbytes

2,048 Kbytes (optional)

1

Can also be operated according to SCSI-1 and SCSI-2 proto-

cols.

2

Standard factory units are formatted as follows:

512 data bytes per s ector
9 spare sectors per cylinder
1 cylinder at the inner track reserved for spares

3

Not including on-board controller overhead.

Barracuda 9 Installation Guide, Rev. A 13

DC power requirements

Single-ended Differential

Voltage regulation

5

Maximum operating current
Maximum starting current

Peak DC
Peak AC

Delayed motor start (max)

3, 6

3

1, 4

Peak operating current

Typical DC
Maximum DC

1

1

Maximum (peak)

+5V

11

± 5%

+12V
± 5%

+5V

2

± 5%

11

Amps

1

1.02 0.83 TBD TBD

0.98
–

2.2

3.1

TBD
TBD

1.04 0.05 TBD TBD

0.97

1.02

1.09

0.8

0.83

1.8

TBD
TBD
TBD

+12V
± 5%

TBD
TBD

TBD
TBD
TBD

2

Track following (DC)

at OD
at ID

1

1

0.94

0.92

0.74

0.76

TBD
TBD

TBD
TBD

Read track

OD DC
AC

1

1.05

1.14

0.79

1.0

TBD
TBD

TBD
TBD

Seeking

Typical DC
Maximum DC
Maximum (peak) AC

1

Measured with an average reading DC ammeter. Instanta-

1, 13

1

0.97

1.00

1.03

0.92

1.04

1.8

TBD
TBD
TBD

TBD
TBD
TBD

neous +12V current peaks will exceed these values.

14 Barracuda 9 Installation Guide, Rev. A

2

A –10% tolerance is permissible during initial start of the spin­dle but must return to ±5% before reaching 7,200 RPM. The
±5% must be maintained after the drive signifies that its
power-up sequence has been completed and that the dri ve is
able to accept selection by the host initiator.

3

See the +12V current profil e in the

ual

(publication number 8 3329030).

4

This condition occurs when the Motor Start option is enabled

Barra cuda 9 Pro duct Man-

and the drive has not yet received a Start Motor command.

5

See “Conducted noise immunity” in the

Barracuda 9 Product

Manual.

The specified voltage tolerance is inclusive of ripple,

noise, and transient re sponse.

6

At power-up, the motor current regulator limits the +12V cur­rent to an average value of less than 1.4A, although instanta­neous peaks may exceed this value. These peaks should
measure 5 msec duration or less.

7

Minimum current loading for each supply voltage is not less
than 4% of the maximum operating current shown.

8

Use separate ground returns for +5V and +12V supplies.

9

Where power is provided to multiple drives from a common
supply, carefully consider individual-drive power requirements.
Where mult iple units are powered on simulta neously, be sure
the peak starting current is available to each device.

10

Operating c ondition is a thir d-str oke seek at OD and read one
Track. A command is issued every 0.075 seconds (every

0.063 seconds on wide and SCA drives).

Barracuda 9 Installation Guide, Rev. A 15

11

No termin ator power. See 11.7.3.4 in the

Barracuda 9 Product

Manual.

12

All power-saving features are enabled; ASA II code only.

13

Seeking is defined as a third-stroke seek at OD. The com­mand is issued every 20 msec.

14

Read track is defined as repeat reads of tra ck 15 with a duty
cycle of: 78% for N drives, 32% for W drives, 48% for WC
drives, 44% for WD drives, and 44% for DC drives.

16 Barracuda 9 Installation Guide, Rev. A

Initial setup information

The general information beginning on this page applies to all of
the Barracuda 9 drive models. After reading th e gene ral informa­tion topics, refer to the appropriate drive-specific section listed
below for additional infor mation about configuring and installing
your particular model.

Drive models Page

ST19171N 28
ST19171W ST19171WD 32
ST19171WC ST19171DC 37

Gener al inform a tion

The following general information topics ar e discussed:

• SCSI ID jumpers

• Drive termination

• Terminator power

• Interface drivers and data path width notes

• Oth er applicable jumper options

• Providing adequate cooling

• Mounting the drive and connecting cables*

• Formatting the drive
*This mounting procedure does not apply to WC or DC model

drives. To mount a WC or DC drive, plug the dri ve into the sys­tem’s single connector attachment (SCA) position on the sys­tem’s back panel.

Barracuda 9 Installation Guide, Rev. A 17

SCSI ID jumpers

Each device on the SCSI chain must have a unique SCSI ID.
The host system’s SCSI controller usually uses the highest-num­bered ID available; therefore the lower-numbered SCSI IDs are
normally used for other SCSI devices such as this Barracuda
disc drive.

Note. Most SCSI controller s (host adapters) allow you to skip a

SCSI ID. For example, you can have ID0, ID1, and ID3
(skipping ID2). Other controllers do not allow this so be
sure to refer to your system or controller user’s manual
for details about its requirements for pro per SCSI device
inst allation.

Most Barracuda disc drives are factory set with the SCSI ID set
at 0. To change the SCSI ID, refer to the appropriate dri ve sec­tion for your model.

If, after completing the installation process, the drive’s LED does
not show on/off activity when the host is trying to communicate
with the drive, a duplicate SCSI ID may be the problem. If thi s is
the case, change the ID so that ea ch d evice on the SCSI chain
has its own unique ID. Also check your system or controller
user’s manual to ensure that you have not violated its SCSI ID
numbering recommendations.

Drive term i nati on

If you are installin g a Barracuda drive in a system that has other
SCSI devices installed, terminate only the end devices on the
SCSI chain. A SCSI “device” is any disc drive, scanner, tape
backup unit, or other piece of hardware connected to your sys­tem using the SCSI bus.

18 Barracuda 9 Installation Guide, Rev. A

Internal

SCSI device

Internal

SCSI device

Controller

External

SCSI device

External

SCSI device

External

SCSI
cable

Internal SCSI cable

Terminate

Internal

SCSI device

Internal

SCSI device

Controller

Internal SCSI cable

Terminate

The top example in Figure 2 s hows an inter nal hard disc at one
end of the SCSI bus with the SCSI controller at the other end
(both are terminated). The bottom example shows two additional
SCSI devices connected externally—this means the SCSI con­troll er is no longer on the end of the SCSI chain and should not
be terminated.

Note. Some controllers prefer to remain terminat ed even if the y

are in the middle of the chain. Also, some controllers treat
the internal and external chains as separate logical
buses. This means you may need to terminate both the
first and last devices on both logical buses to achieve
proper termination. If necessary, refer to your system or
controller documentation to see how this is handled in
your particular system.

For information about how to terminate your drive, refer to the
appropriate drive-specific section.

Figure 2. SCSI bus termination

Barracuda 9 Installation Guide, Rev. A 19

Terminator power

You usually will not need to change this option and can normally
leave the drive c onfigured as it was shipped from the factory. For
informati on about how to change the term inator power option on
your drive, refer to the appropriat e drive-specific section.

I/O circu its an d data path widths

• WD and DC models use differential I/O circuits. You cannot

mix these models with single-ended models (N, W, WC) on
the same SCSI bus. The circuits are incompatible with each
other.

• W, WD, an d WC models have a “wide” (16-bit) SCSI data bus

rather than the standard (non-wide) 8-bit SCSI data bus; how­ever, you can use these wide drives on a standard (non-wide)
8-bit data bus.

Pro vid ing ade qu ate coolin g

The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperature is 50°C.

The drive’s product manual (83329030) describes how to evalu­ate the air -flow design. The evaluation consists of ensurin g that
the case temperature of certain critical components remains
within acceptable li mits during drive operation.

We recommend orienting the drive or directing the air flow in a
way that creates the least amount of air-flow resistance while
providing air flow above the circuit boards and aro und the head
and disc assembly (HDA). Also, choose the shortest possible
path between the air inlet and exit. This minimizes the distance

20 Barracuda 9 Installation Guide, Rev. A
traveled by air that is heated by the drive and by other nearby

heat sources.
Figure 3 shows two design approaches with one or more fans

used to generate air flow. The air-flow patterns can be created
by the fans either pushing or drawing air. The overall flow pattern
can be direct ed from front to back, back to front, or side to side.

Barracuda 9 Installation Guide, Rev. A 21

Kühl un g des System s

Die Gehäusekonstr uktion mu ß eine ausreiche nde Kühlung de s
Laufw erkes g ewährle isten. Die U mgebun gstempera tur darf
maximal 50°C betragen.

Die Produkthandbuch Barracuda 9 (Dokument 83329030)
enthal ten Anweisung en zur Beurteilu ng der Luftstr omkonstruk­tion. Die Be urteilung muß si cherst ellen, daß sich die Gehäuse­temperatur bestimmter kritischer Komponenten bei
Laufwerkbetrieb innerhalb zugelassener Grenzen hält.

Wir empfehlen, das Laufwerk so zu orientieren oder den Luft­strom so z u lenken, daß der gering ste Luf tstromw iderstand
erzeugt wird und gleichzeitig ein Luftstrom über den Platinen
und um die Kopf- und Festplatteneinheit (HDA) gegeben ist.
Wählen Sie einen möglichst kurzen Weg zwischen Lufteinlaß
und -auslaß. Dadurch wird die Strecke, die die vom Laufwerk
und anderen nahegelegenen Hitzequellen aufgewärmte Luft
zurücklegt, auf ein Minimum beschränkt.

Abbildung 3 zeigt zwei Konstruktionsmöglichkeiten, bei denen
ein oder mehrere Lüfter den Luftstrom erzeugen. Der Luftstro m­verlauf wird durch die Lüfter gesteuert, die entweder Luft einbla­sen oder abziehen. Generell kann der Luftstrom entweder von
vorne nach hinten oder von hinten nach vorne verlaufen.

22 Barracuda 9 Installation Guide, Rev. A

.

SEAGATE

Above unit
Über der Einheit

Note. Air flows in the direction shown (back to front)
or in reverse direction (front to back)

Hinweis. Luftstrom in der angezeigten Richtung
(von vorne nach hinten) oder in umgekehrter
Richtung (von hinten nach vorne)

Under unit
Unter der Einheit

Note. Air flows in the direction shown or
in reverse direction (side to side)

Hinweis. Luftstrom in der angezeigten Richtung oder in
umgekehrter Richtung (von Seite zu Seite)

Figure 3. Suggested air flow
Abbild ung 3. Empfohlener Luftstromver lauf

SEAGATE

Above unit
Über der Einheit

Under unit
Unter der Einheit

Barracuda 9 Installation Guide, Rev. A 23

Mou nti ng the driv e and conne ctin g cabl es

Do not touch the c onnector pins or any com ponents on the con­trol board without observing static-discharge precautions.
Alw ays handle the drive by the frame only.

The drive may be m ounted in any orientati on (horizontall y, verti ­cally, and any combination thereof); however, you must ensure
that the drive receives adequate air flow for cooling.

1. Mount the driv e to the host system’s chassis using four 6-32

UNC screws. Two mounting holes are in each side of the
driv e and there are four mounting holes in the bottom of the
drive.

The maximum length that the screws should extend i nto the
chassis mounting holes is 0.15 inch (3.81 mm), measured
from the outer surface of the chassis. Tighten the screws
down evenly. Do not over-tighten or force the screw if it
does not s eem to s crew in easily, because this means the
threads are not properly aligned. In this case, back the
screw out and try again.

Instal latio n des Laufwer kes
und Anschluß der Kabel

Beachten Sie beim Handhaben und Anfassen der Anschlußstifte
und Komponenten die Vorsichtsmaßnahmen zur Verhinderung
statischer A ufladung. Fassen Sie das Laufwerk nur am Rahmen
an.

Das Laufwerk kann in beliebiger Orientierung (horizontal, ver­tikal oder schräg) installiert werden; jedoch muß dafür gesorgt
werden, daß ein ausreichender Luftstrom z ur Kühlung des Lauf­werkes vorhanden ist.

24 Barracuda 9 Installation Guide, Rev. A

1. Befestigen Sie da s Laufwerk mit vier 6-32-UNC-Schr auben

am Geh äuse des Host-Systems. Di e beiden Seiten des
Laufwerkes sind mit jeweils zwei Befestigungslöchern
versehen, die Unterseite des Laufwerkes weist vier weitere
Befestigungslöcher auf.

Geme ssen von der Außenfläche des Gehä uses dürfen die
Schrauben maximal 3,81 mm in die B efestigungslöcher des
Geh üuses hi neinr agen. Die S chrau ben müs sen gle ich­mäßig, jedoch nicht zu fest, angezogen werden. W enn sich
eine Schraube nicht ohne Widerstand einschrauben läßt,
sind di e Gewinde ni cht korrekt anei nander ausger ichtet. In
diesem Fall die Schraube nicht in das Gewindeloch
forcieren, so ndern die Schraube herausnehmen und erneut
in das Gewindeloch einführen.

2. Verify that all connections between the drive and the host

system are correctl y installed.

2. Prüfen Sie, ob alle Verbindungen zwischen dem Laufwerk

und dem Host-System korrekt hergestellt sind.

3. Verify that you have correctly installed jumpers.

3. Stellen Sie sicher, daß die Kennungsbrücken installiert sind.

4. Connect the SCSI cable into the drive’s SCSI connector.

Take care not to stretch or crimp this cable, and do not
block the system’s cooling air flow with the cable.

The drive receives DC power through a 4-pin connector
mounted next to the SCSI connector. The output of a power
supply must meet SELV (safety extra low voltage) as

Barracuda 9 Installation Guide, Rev. A 25

defined in IEC 950. Figure 4 provides the pin information for
the DC power connector. To connect the DC power cable to
the drive, simply insert the cable end into the drive’s DC
power connector.

4. Schließen Sie das SCSI-Kabel an den SCSI-Steckverbinder

des L aufwerke s an. Das Ka bel darf nicht gedehn t oder
gedrückt werden und es darf den Luftstr o m zur K ühlung des
Systems nicht b ehindern.

Das Laufwerk wird über einen 4-poligen, neben dem SCSI­Anschluß befestigte n Steckverbinder mit Gleichstrom ver­sorgt. Der Ausgang eines Netzteils muß SELV (safety extra
low vo ltage) nac h IE C 950 entspre chen. Abbi ldung 4 zeigt
die Steckerbelegung für den G leichstromanschluß. Zum
Anschluß des Gleichstromkabels an das Laufwerk das
Kabelende in den Gleichstromanschluß des Laufwerkes
stecken.

Pin

1
2
3
4

Power

+12V
+12V return
+ 5V return
+ 5V

Pin

1
2
3
4

Gleichstrom

+12 V
+12 V Rückleitung
+ 5 V Rückleitung
+ 5 V

4321

Figure 4. DC power connector
Abbildu ng 4. Gleichstr omanschluß

26 Barracuda 9 Installation Guide, Rev. A
Note. Signal ground on the power control board (PCB) and t he

head and disc assembly (HDA) are connected together in
this drive and you cannot separate t hem. The equipment
in which you have mounted the drive is connected
dire ctly to the HDA and PCB wit hout electrically isolating

shock mounts. Maximizing the conductive contact area
between HDA ground and system ground may reduce
radiated emissions.

If you do not want the system chassis to be connected to
the HDA/PCB ground, you must provide a nonconductive
(electrically isolating) method of mounting the drive in the
host system. This may increase radiated emissions and
is the system designer’s responsibility.

Hinw eis:

Die Signalerde auf der Stromregelungskarte (PCB) und

der Kopf- und Festplatteneinheit (HDA) sind in diesem

Laufwerk miteinander verbunden und können nicht

getrennt werden. Das Gerät, in das Si e das Laufwerk

eingebaut haben, ist ohne elektrisch isolierende

Stoßdämpfer direkt an die HDA und PCB angeschlos sen.

Die elektromagnetische Strahlung kann reduziert wer-

den, indem Sie eine möglichst große leitende Kontak-

fläche zwischen der HDA-Erdung und der Systemerdung

vorsehen.

Wenn Sie das Sy stemgehäuse nicht an die HDA/PCB-

Erdung anschließ en wollen, müssen Sie das Laufwerk

auf nichtleitende Weise (galvanisch isoliert) im Host-Sys-

Barracuda 9 Installation Guide, Rev. A 27

tem einbauen. Die daraus u.U. resultierende verstärkte

elektromagnetische Strahlung fällt i n den Zuständigkeits-

bereich des Systemdesigners.

5. Replace the host system’s cover.

5. Setzen Sie das Gehäuseoberteil des Host-Systems wieder
auf.

Formatting the drive

Warning. Formatting a drive erases all user data. Be sure that

you understand this principle before formatting any
hard disc drive. It is not necessary to format a drive
that previously has been used to store data, unless
your intention is to erase all user data.

1. Turn on DC power.

2. Boot the system from a system floppy disc or from a previ­ously installed hard disc drive if there is one.

3. Format the disc drive. Barracuda 9 disc driv es are designed
to operate with a variety of operating systems. Please refer
to your system or SCSI controller manual for information
about formatting and setting up the drive. Some quick desk­top system notes are provided below.

Quick reference desktop system notes
Note. Refer to your system or utility manual for detailed in struc-

tions)

• DOS. Set the drive type in CMOS to “

hard drive installed

• Macintosh. Use a third-party drive utility (Apple’s HD Setup

utility only works with Apple firmware drives).

Zero,” “None,”

or “

.” Use FDISK.exe and FORMAT.exe.

No

28 Barracuda 9 Installation Guide, Rev. A

N drive s

N/ND drives sectionSettin g the SCS I ID jumpers

Use the J6 connector to set the SCSI ID (see Figure 5). To
change the SCSI ID, install jumpers on the a ppropriate pins as
shown in the illustration.

Drive
Front

Jumper Plug

(enlarged to
show detail)

Pin 1

SCSI ID = 0
(default)

SCSI ID = 1
SCSI ID = 2
SCSI ID = 3

SCSI ID = 4
SCSI ID = 5

SCSI ID = 6

Reserved

J6

L

R

R

E

E

E

S

A2A1A

S

D

0

SCSI ID = 7

Figure 5. Setting the SCSI ID

Barracuda 9 Installation Guide, R e v. A 29

N drive s

Terminating the drive

ST19171N drives are terminated with permanently mounted IC
active termi nators. If you install one of these drives and it is not
on the end of the SCSI bus, disable the terminators by removing
the jumper from pins 15 and 16 of connector J2 (see Figure 6). If
you install the drive on the end of the SCSI bus, enable termina­tion by install ing a jumper on pins 15 and 16 of connector J2.

Pin 1

J2











R





T

D

M

W

P

E

T

T

E

S

E

P

D

S

P

P

Enable SCSI terminator (default)
Disable SCSI terminator

J6

Drive
Front

J2 Jumper Type

(enlarged to
show detail)

Figure 6. Terminating the drive

J2

SCSI I/O

Connector

DC Power
Connector

J1

30 Barracuda 9 Installation Guide, Rev. A

N drive s

Terminator power

There are three possible terminator power configurations for
ST19171N drives (see Figure 7). You will not normally need to
change this option and can leave the drive configured as it was
shipped from the factory.

Pin 1

J2











R





T

D

M

W

P

E

T

T

E

S

E

P

D

S

P

P

Term. Power from Drive (default)
Term. Power to SCSI Bus
Term. Power from SCSI Bus

Position A

J2

J6

SCSI I/O

Connector

Drive
Front

J2 Jumper Type

(enlarged to
show detail)

DC Power
Connector

Figure 7. Setting term inator power jumpers

J1

Barracuda 9 Installation Guide, R e v. A 31

N drive s

Oth er app licab le jump er opti on s

Several other jumper options are available as illustrated.

Drive with
HDA up, PCB
down, viewed

from front

Reserved

HDA

L

R

E

E

D

S

R
E
S

Reserved
Remote

11

LED

12

Shipped with cover installed.

Do not remove.

Do not install jumpers

on these four positions.

Drive Front

Pin 1

A2A1A

J6

J6

0

CATH

J6

Jumper Type

(enlarged to
show detail)

Pin 1

End

J2

Reserved
Delay Motor Start option 

(valid only if the Enable 
Motor Start jumper is 
not connected)

Disable the Delay Motor 
Start option (default).

Motor start delay equal 
to the SCSI ID multiplied 
by 12 seconds. For 
example, if the SCSI 
ID = 2, the drive starts 
in 24 seconds.

Motor Start option
Disable motor start 

(default). The drive 
starts according to the 
Delay Motor Start option.

Enable motor start. The 
drive waits for the Start 
Unit command from the 
host before starting the 
spindle motor.

Pin 1

J2

DC Power
Connector

J1

SCSI I/O

Connector

J2 Jumper Type

(enlarged to
show detail)

Figure 8. Additional jumper options

Pin 1

Write Protect option
Write protect = Off 

(enables writing – 
default).

Write protect = On 
(disables writing).

Parity Check option
Enable parity check of 

SCSI bus (default).
Disable parity check.

32 Barracuda 9 Installation Guide, Rev. A

W/WD drives

W/WD drives secti onSettin g the SCS I ID jumpers

Use the J6 jumper block to set the SCSI ID (Figure 9). To
change the SCSI ID, install jumpers on the appropriate pins as
shown in the illustration. Optional connections to switching cir­cuits in host equipment are provided on J1 auxiliary to set the
SCSI ID (see Figure 10).

Drive
Front

Jumper Plug

(enlarged to
show detail)

J6

Pin 1

SCSI ID = 0
(default)

SCSI ID = 1
SCSI ID = 2
SCSI ID = 3

SCSI ID = 4
SCSI ID = 5

SCSI ID = 6
SCSI ID = 7
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10

SCSI ID = 11
SCSI ID = 12

SCSI ID = 13

Reserved

L

R

E

E

A2A3A1A

D

S

0

Figure 9. Setting the SCSI ID

SCSI ID = 14
SCSI ID = 15

Barracuda 9 Installation Guide, R e v. A 33

W/WD drives

Drive HDA (rear view, PCB facing downward)

68 Pin

SCSI I/O Connector

J1 Auxiliary

SCSI ID = 0
SCSI ID = 1

SCSI ID = 2
SCSI ID = 3

SCSI ID = 4

Pin 1

Pin 12

A3A2A1A

J1 Auxiliary

Pin 1

1P2P3P4P

DC Power
Connector

Pin 1 Pin 1

0

(default)

J1 Auxiliary

*Fault LED
*Vendor Unique

*Spindle Sync
*Activity LED

No Connection

A3A2A1A

0

PCB

SCSI ID = 5
SCSI ID = 6

SCSI ID = 7
SCSI ID = 8

SCSI ID = 9
SCSI ID = 10
SCSI ID = 11

SCSI ID = 12
SCSI ID = 13

SCSI ID = 14
SCSI ID = 15

Ground
+5V

Pins 2, 4, 6, and 8 are driven low 

*

for 250 ms after PWR ON and reset 
to allow jumper-selectable SCSI ID.

Figure 10. Using the J1 auxiliary jumper block

34 Barracuda 9 Installation Guide, Rev. A

W/WD drives

Terminating the drive

ST19171W drives are terminated with permanently mounted IC
active termi nators. If you install one of these drives and it is not
on the end of the SCSI bus, disable the terminators by removing
the jumper from pins 15 and 16 of connector J2. If you install the
drive on the end of the SCSI bus, enable t ermination by installing
a jumper on pins 15 and 16 of connector J2 (see Figure 11).

Note. Use active (ANSI SCSI-2 Alternat ive 2) termi nators wh en

terminating the bus.

ST19171WD drives do not have internal terminators or any other
way of adding internal termination to the drive. You must provide
external differ ential ter minati on to th ese drives when terminati on
is required.

Pin 1

J2











R





T

D

M

W

P

E

T

T

E

S

E

P

D

S

P

P

*Enable SCSI terminator (default)
*Disable SCSI terminator

*ST19171W only

J2

J6

Drive
Front

J2 Jumper Type

(enlarged to
show detail)

SCSI I/O

Connector

DC Power
Connector

J1

Figure 11. Terminating the drive (ST19171W shown)

Barracuda 9 Installation Guide, R e v. A 35

W/WD drives

Terminator power

There are three possible terminator power configurations for
ST19171W drives (see Figure 12). You will not normally ne ed to
change this option and can leave the drive configured as it was
shipped from the factory.

There are two possible terminator power configurations for
ST19171WD drives (see Figure 12).

Pin 1

J2











R





T

D

M

W

P

E

T

T

E

S

E

P

D

S

P

ST19171W

P

Term. Power from Drive (default)
Term. Power to SCSI Bus
Term. Power from SCSI Bus

ST19171WD
Term. Power to SCSI Bus (default)
Host adapter or other device provides 

term. power to external terminator.

J6

Drive
Front

J2 Jumper Type

(enlarged to
show detail)

Position A

J2

SCSI I/O

Connector

DC Power
Connector

J1

Figure 12. Setting term inator power jumpers

36 Barracuda 9 Installation Guide, Rev. A

W/WD drives

Oth er app licab le jump er opti on s

Other option jumpers are available as illustrated below.

Drive with
HDA up, PCB
down, viewed

from front

Reserved

HDA

L

R

E

E

D

S

R

E
S

Reserved
Remote

11

LED

12

Shipped with cover installed.

Do not remove.

Do not install jumpers

on these four positions.

Drive Front

A2A1A

J6

Pin 1

J6

0

Jumper Type

(enlarged to
show detail)

Pin 1

End

CATH

J6

J2

Reserved
Delay Motor Start option 

(valid only if the Enable 
Motor Start jumper is 
not connected)

Disable the Delay Motor 
Start option (default).

Motor start delay equal 
to the SCSI ID multiplied 
by 12 seconds. For 
example, if the SCSI 
ID = 2, the drive starts 
in 24 seconds.

Motor Start option
Disable motor start 

(default). The drive 
starts according to the 
Delay Motor Start option.

Enable motor start. The 
drive waits for the Start 
Unit command from the 
host before starting the 
spindle motor.

Pin 1

DC Power
Connector

J1

SCSI I/O

Connector

J2 Jumper Type

(enlarged to
show detail)

Figure 13. Additional jumper options

J2

Pin 1

Write Protect option
Write protect = Off 

(enables writing – 
default).

Write protect = On 
(disables writing).

Parity Check option
Enable parity check of 

SCSI bus (default).
Disable parity check.

Barracuda 9 Installation Guide, R e v. A 37

WC/DC drives

WC/DC d rive s sectio nSettin g the SCS I ID jumpers

The SCSI ID for WC and DC drives is normally set over the SCSI
bus by the host system using connector contacts 39 (ID0), 40
(ID2), 79 (ID1), and 80 (ID3).

Terminating the drive

ST19171WC and ST19171DC drives do not have inter nal termi­nators or any other way of adding internal termination to the
drive. You must provide external termination to these drives
when terminati on is required.

38 Barracuda 9 Installation Guide, Rev. A

WC/DC drives

Appl ica bl e jump er op tio ns

Option jumpers are available as illustrated below.

Pin 1

J2











R





T

D

M

W

P

E

T

T

Delay Motor Start option
The host system has complete 

control over motor start functions. Do 
not install a jumper on these pins.

Enable Motor Start option
The host system has complete 

control over motor start functions. Do 
not install a jumper on these pins.

E

S

E

P

D

S

P

P

Write Protect option
Write protect = Off 

(enables writing – default)
Write protect = On 

(disables writing)
Parity Check option

Enable parity check of SCSI bus 
(default).

Disable parity check.

J6

Drive
Front

J2 Jumper Type

(enlarged to
show detail)

J2

SCSI I/O

Connector

DC Power
Connector

J1

Figure 14. Jumper options

Seag ate Tech nolo gy, Inc.
920 Disc Dri ve, Scotts Valley, CA 95066-4544, USA

Publicatio n Number: 83329020, Rev. A, P rinted in USA