Seagate BARRACUDA 9 User manual

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BARRACUDA 9
Disc Drive
ST19171N/W/WD/WC/DC
Installation Guide

Contents
Preface ........................................................................................1
Electrostatic discharge protection................................................1
Important safety information and precautions..............................2
Wichtige Sicherheitshinweise ......................................................4
European Union Compliance.......................................................8
Technical support services ..........................................................9
General description....................................................................11
Initial setup information..............................................................16
Kühlung des Systems................................................................21
Installation des Laufwerkes
und Anschluß der Kabel..........................................................23
N drives section.........................................................................28
W/WD drives section .................................................................32
WC/DC drives section................................................................37
©1995 Seagate Technology, Inc. All rights reserved
Publication Number: 83329020, Rev. A
February 1996
Seagate®, Seagate Technology®, and the Seagate logo are reg-
istered 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 Com-
puter, 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 informa-
tion. Additional information is available in the
Barracuda 9 Prod-
uct Manual
(part number 83329030). Contact your Seagate
sales representative if you need to order this publication.
Electrostatic discharge protection
Caution. Removal of circuit boards by personnel not perform-
ing depot repair will damage components and may
void the warranty.
All drive electronic assemblies are 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 ground 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, Rev. A
• Turn off the power before removing or installing the DC power
cable.
• Do not remove any circuit boards from the drive.
• Never use an ohmmeter on any circuit boards.
• When installing the drive on a carrier or tray, discharge the
carrier or tray prior to inserting it into the system.
Important safety information and precautions
Caution. Use forced-air ventilation when bench-testing the
drive to ensure proper cooling of drive components.
Use proper safety and repair techniques for safe, reliable opera-
tion of this unit. Service should be done only by qualified per-
sons. 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, you 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 followed
to minimize or eliminate the risk of personal injury. The warnings
point out conditions or practices that may endanger you or oth-
ers. The cautions point out conditions or practices that may dam-
age 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 ways 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 precautions:
• 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 when the drive
is mounted in an equipment rack or cabinet. When units are
stacked vertically, pay special attention to the top where tem-
peratures are usually highest.
• Follow the precautions listed above in “Electrostatic discharge
protection.”
• 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 perform-
ing 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 not field repair-
able. 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, Rev. A
As a component, this drive is designed to be installed and oper-
ated in accordance with UL1950, EN60950, CSA C22.2 950-
M89, and VDE0805.
Seagate takes all reasonable steps to ensure that its products
are certifiable to currently accepted standards. Typical applica-
tions of these disc drives include customer packaging and sub-
system design. Safety agencies conditionally certify 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
acceptability in obtaining safety-regulatory agency compliance in
their end-use products and for certifying where required by law.
A necessary part of meeting safety requirements is the provision
for overcurrent protection on drive SELV supply voltages.
This unit is a component part and as such is not meant to comply
with FCC or similar national requirements as a stand-alone unit.
Engineering radiated emissions test results are available
through the Seagate Safety Department to assist 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 dürfen nur von qualifiziertem Fach-
personal vorgenommen werden. 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 Empfehlun-
gen 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 Vorsichtshinweise sind nicht allumfassend! 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 sicher, daß das gewählte Verfahren weder Ihre
persönliche Sicherheit noch die Leistung der Einheit gefährdet.
Beachten Sie in jedem Fall die folgenden Warn-und Vorsicht-
shinweise:
• 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, Rev. 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 aus-
bzw. einbauen.
• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse
montiert ist, sorgen Sie dafür, daß die Temperatur im Inneren
des Gestells oder Gehäuses die für das Laufwerk vorgege-
benen Grenzwerte nicht übersteigt. Wenn Einheiten vertikal
übereinander betestigt werden, achten Sie besonders auf den
oberen Stapelbereich, da dort die Temperatur gewöhnlich am
höchsten ist.
• Befolgen Sie die oben unter “Electrostatic Discharge Protec-
tion” angegebenen Sicherheitsmaßnahmen.
• Nehmen Sie keine Platinen aus dem Laufwerkgehäuse. Wenn
eine Platine defekt ist, muß das gesamte Laufwerk zur Rep-
aratur 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! Falls die HDA beschädigt ist,
schicken Sie das gesamte Laufwerk zur Reparatur ein.
• Die HDA ist nicht vor Ort reparierbar und darf nicht auseinan-
dergenommen werden! Öffnen der versiegelten HDA durch
andere Personen als die für die werkseitige Reparatur zustän-
digen hat eine Beschädigung der Komponenten und
Erlöschen des Garantieanspruchs zur Folge.

Barracuda 9 Installation Guide, Rev. A 7
Als Teilkomponente ist dieses Laufwerk für die Installation und
den Betrieb in Übereinstimmung mit UL 1950, EN60950, CSA
C22.2 950-M89 und VDE0805 vorgesehen.
Seagate ist ständig bemüht, die Zulassungsfähigkeit von
Seagate-Produkten im Rahmen der gegenwärtig geltenden
Standards zu gewährleisten. Zu den typischen Anwendungen
dieser Festplattenwerke zählen Systemeinbau durch den
Kunden und die Konstruktion von Untersystemen. Sicherheits-
behörden gewähren eine bedingte Zulassung für Komponenten
wie das Barracuda-Festplattenlaufwerk vorbehaltlich der
endgültigen Zulasssung im Endprodukt. Designer von Untersys-
temen sind dafür verantwortlich, die Voraussetzungen für die
Einhaltung sicherheits- oder aufsichtsbehördlicher Vorschriften
in ihren Endprodukten und - falls gesetzlich vorgeschrieben - für
die Zulassung zu schaffen. Eine Grundvoraussetzung zur Ein-
haltung der Sicherheitsanforderungen ist die Bereitstellung
eines Überlastschutzes für die SELV-Versorgungsspannungen
des Laufwerks.
Dieses Gerät ist eine Baugruppe und unterliegt als solche nicht
den Anforderungen der FCC oder ähnlicher nationaler Behörden
für eigenständige Geräte. Technische Testergebnisse zu elek-
tromagnetische Strahlung sind für Designer von Untersystemen
auf Anfrage von der Seagate-Sicherheitsabteilung erhältlich.

8 Barracuda 9 Installation Guide, Rev. A
European Union Compliance
If this model has the CE Marking, it complies with the European
Union requirements of the Electromagnetic Compatibility Direc-
tive 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 confirm compliance
to the above directives. The drive was tested in a representative
system for typical applications. The selected system represents
the most popular characteristics for test platforms. The system
configurations include:
• 486, Pentium, and PowerPC Microprocessors
• 3.5-inch Floppy Disc Drive
• Keyboard
• Monitor/Display
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 Marking 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.
Product technical support is available for all Seagate products by
calling the SeaFAX™, SeaFONE™, SeaTDD™, or Sea-
BOARD™ 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 site.
SeaFAX: USA [phone]; England 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.
CompuServe forum
Online support for Seagate products is available on Com-
puServe. This includes an extensive question and answer mes-
sage base, downloadable utilities, and documentation files in
AdobeTM 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
information on selected Seagate products is provided while you
are on hold. Recordings 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 peo-
ple 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 oper-
ate at 300 to 9600 baud. With this service you can access:
• Specifications and jumper configurations
• Reprints of documentation
• Utilities that you can download to your own computer
SeaBOARD Location Modem number
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 pro-
vided 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 drive is a component for installation in an enclosure
designed for the drive. This is often a rack within the system or
an external enclosure designed to house one or more disc drives
or other peripheral units. In either case, the disc drive must
receive adequate cooling (refer to “Providing adequate cooling”)
and it must be sufficiently grounded and shielded from emis-
sions. The
Barracuda 9 Product Manual (part number
83329030) contains guidelines for a properly designed
enclosure.
Figure 1. Barracuda 9 disc drive
(N model shown)
Pin 1
SCSI I/O
Connector
Pin 1 DC Power
Connector
J6
J1
J2

12 Barracuda 9 Installation Guide, Rev. A
Characteristics ST19171
Interface UltraSCSI1
Capacity
Unformatted 11.7 Gbytes
Formatted29.1 Gbytes
Recording
Cylinders (user) 5,273
Read/write data heads 20
Servo heads Embedded
Seek time3
Average read 9.0 msec
Average write 10.5 msec
Disc rotation
RPM 7,200
Average latency 4.17 msec
Internal transfer rate 80 to 124
(Mbits/sec, variable with zone)
Max sync. SCSI transfer rate
N 20 Mbytes/sec
W/WD/WC/DC 40 Mbytes/sec
Multi-segmented cache 512 Kbytes
2,048 Kbytes (optional)
1Can also be operated according to SCSI-1 and SCSI-2 proto-
cols.
2Standard factory units are formatted as follows:
512 data bytes per sector
9 spare sectors per cylinder
1 cylinder at the inner track reserved for spares
3Not including on-board controller overhead.

Barracuda 9 Installation Guide, Rev. A 13
DC power requirements
1Measured with an average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
Single-ended Differential
+5V11
± 5% +12V ± 5%2+5V11 ± 5% +12V ± 5%2 Voltage regulation5
Amps
Maximum operating current11.02 0.83 TBD TBD
Maximum starting current
Peak DC 3, 6
Peak AC 3 0.98
–2.2 3.1 TBD TBD TBD TBD
Delayed motor start (max)1, 4 1.04 0.05 TBD TBD
Peak operating current
Typical DC1
Maximum DC 1
Maximum (peak)
0.97
1.02
1.09
0.8
0.83
1.8
TBD
TBD
TBD
TBD
TBD
TBD
Track following (DC)
at OD 1
at ID1 0.94
0.92 0.74 0.76 TBD TBD TBD TBD
Read track
OD DC 1
AC 1.05 1.14 0.79 1.0 TBD TBD TBD TBD
Seeking
Typical DC1, 13
Maximum DC 1
Maximum (peak) AC
0.97
1.00
1.03
0.92
1.04
1.8
TBD
TBD
TBD
TBD
TBD
TBD

14 Barracuda 9 Installation Guide, Rev. A
2A –10% tolerance is permissible during initial start of the spin-
dle 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 drive is
able to accept selection by the host initiator.
3See the +12V current profile in the
Barracuda 9 Product Man-
ual
(publication number 83329030).
4This condition occurs when the Motor Start option is enabled
and the drive has not yet received a Start Motor command.
5See “Conducted noise immunity” in the
Barracuda 9 Product
Manual.
The specified voltage tolerance is inclusive of ripple,
noise, and transient response.
6At power-up, the motor current regulator limits the +12V cur-
rent to an average value of less than 1.4A, although instanta-
neous peaks may exceed this value. These peaks should
measure 5 msec duration or less.
7Minimum current loading for each supply voltage is not less
than 4% of the maximum operating current shown.
8Use separate ground returns for +5V and +12V supplies.
9Where power is provided to multiple drives from a common
supply, carefully consider individual-drive power requirements.
Where multiple units are powered on simultaneously, be sure
the peak starting current is available to each device.
10Operating condition is a third-stroke 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
11No terminator power. See 11.7.3.4 in the
Barracuda 9 Product
Manual.
12All power-saving features are enabled; ASA II code only.
13Seeking is defined as a third-stroke seek at OD. The com-
mand is issued every 20 msec.
14Read track is defined as repeat reads of track 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 the general informa-
tion topics, refer to the appropriate drive-specific section listed
below for additional information about configuring and installing
your particular model.
Drive models Page
ST19171N 28
ST19171W ST19171WD 32
ST19171WC ST19171DC 37
General information
The following general information topics are discussed:
• SCSI ID jumpers
• Drive termination
• Terminator power
• Interface drivers and data path width notes
• Other 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 drive into the sys-
tem’s single connector attachment (SCA) position on the sys-
tem’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-num-
bered ID available; therefore the lower-numbered SCSI IDs are
normally used for other SCSI devices such as this Barracuda
disc drive.
Note. Most SCSI controllers (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 proper SCSI device
installation.
Most Barracuda disc drives are factory set with the SCSI ID set
at 0. To change the SCSI ID, refer to the appropriate drive sec-
tion 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 this is
the case, change the ID so that each device 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 termination
If you are installing 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 sys-
tem using the SCSI bus.

18 Barracuda 9 Installation Guide, Rev. A
The top example in Figure 2 shows an internal 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 con-
troller is no longer on the end of the SCSI chain and should not
be terminated.
Note. Some controllers prefer to remain terminated even if they
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
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