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Barracuda 9
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Installation Guide
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Barracuda 9 Installation Guide, Rev. B
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 semi-
conductors 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. B
• 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 car-
rier 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. B
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. B
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 com-
ply 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. B
5
aratur der Einheit. Einige Verfahren erfordern Spezialwerkzeuge;
diese müssen zur sachgemäßen Ausführung der Wartungsarbe-
iten und aus Sicherheitsgründen den Empfehlungen entsprech-
end 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. B
• 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. B
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. Sicherheitsbe-
hörden gewähren eine bedingte Zulassung für Komponenten wie
das Barracuda-Festplattenlaufwerk vorbehaltlich der endgültigen
Zulasssung im Endprodukt. Designer von Untersystemen 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 Einhal-
tung 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 elektro-
magnetische Strahlung sind für Designer von Untersystemen auf
Anfrage von der Seagate-Sicherheitsabteilung erhältlich.
8
Barracuda 9 Installation Guide, Rev. B
Regulatory agency compliance
Electromagnetic susceptibility
As a component assembly, the drive is not required to meet any
susceptibility performance requirements. It is the responsibility of
those integrating the drive within their systems to perform those
tests required and design their system to ensure that equipment
operating in the same system as the drive or external to the sys-
tem does not adversely affect the performance of the drive. See
DC power requirements on page 17.
Electromagnetic compliance
Seagate uses an independent laboratory to confirm compliance
to the directives/standard(s) for CE Marking and C-Tick Marking.
The drive was tested in a representative system for typical appli-
cations. The selected system represents the most popular char-
acteristics for test platforms. The system configurations include:
• 486, Pentium, and PowerPC microprocessors
• 3.5-inch floppy disc drive
• Keyboard
• Monitor/display
• Printer
• External modem
• Mouse
Although the test system with this Seagate model complies to
the directives/standard(s), we cannot guarantee that all systems
will comply. The computer manufacturer or system integrator
shall confirm EMC compliance and provide CE Marking and C-
Tick Marking for their product.
Barracuda 9 Installation Guide, Rev. B
9
Electromagnetic compliance for the European Union
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.
Australian C-Tick
If this model has the C-Tick Marking it complies with the Austra-
lia/New Zealand Standard AS/NZS3548 1995 and meets the
Electromagnetic Compatibility (EMC) Framework requirements
of Australia’s Spectrum Management Agency (SMA).
10
Barracuda 9 Installation Guide, Rev. B
Seagate technical support services
If you need assistance installing your drive, consult your dealer.
Dealers are familiar with their unique system configurations and
can help you with system conflicts and other technical issues. If
®
you need additional assistance with your Seagate drive or other
Seagate products, use one of the Seagate technical support ser-
vices listed below.
SeaFONE® 1-800-SEAGATE
Seagate’s 800 number (1-800-732-4283) allows toll-free access
to automated self-help services, providing answers to commonly
asked questions, troubleshooting tips, and specifications for disc
drives and tape drives. This service is available 24 hours daily
and requires a touch-tone phone. International callers can reach
this automated self-help service by dialing 408-456-4496.
Online services
Using a modem, you can obtain troubleshooting tips, free utility
programs, drive specifications and jumper settings for Seagate’s
entire product line. You can also download software for installing
and analyzing your drive.
SeaNET™
You can obtain technical information about Seagate products
over the Internet from Seagate’s World Wide Web home page
(http://www.seagate.com) or Seagate’s ftp server (ftp://
ftp.seagate.com). You can also send E-mail with your questions
to DiscSupport @ Seagate.com or TapeSupport @
Seagate.com.
Barracuda 9 Installation Guide, Rev. B
11
Seagate CompuServe forum
Online technical support for Seagate products is available on
CompuServe. To access our technical support forum, type go
seagate. This forum provides information similar to that found on
SeaBOARD. In addition, you can type questions or browse
through previous questions and answers on the forum mes-
sages.
SeaBOARD®
SeaBOARD is a computer bulletin board system that contains
information about Seagate disc and tape drive products and is
available 24 hours daily. Set your communications software to
eight data bits, no parity, and one stop bit (8-N-1).
Location
Australia
England
France
Germany
Singapore
Taiwan
Phone number
61-2-9756-2359
44-1628-478011
33 1-48 25 35 95
49-89-140-9331
TBA
886-2-719-6075
662-531-8111
Disc: 408-434-1080; Tape: 408-456-4415
Thailand
USA
12
Barracuda 9 Installation Guide, Rev. B
FAX services
SeaFAX®
You can use a touch-tone telephone to access Seagate’s auto-
mated FAX system to receive technical support information by
return FAX. This service is available 24 hours daily.
Location
Australia
England
USA
Phone number
61-2-9756-5170
44-1628-894084
1-800-SEAGATE or 408-456-4496
Seagate technical support FAX
You can FAX questions or comments to technical support spe-
cialists 24 hours daily. Responses are sent during business
hours.
Location
Australia
England
France
Phone number
61-2-9725-4052
44-1628-890660
33 1-46 04 42 50
49-89-1430-5100
Germany
Hong Kong 852-2368 7173
Japan
Korea
Singapore
Taiwan
USA
81-3-5462-2979
82-2-556-7294/4251
65-488-7528
886-2-715-2923
408-944-9120
Barracuda 9 Installation Guide, Rev. B
13
Direct-support services
Seagate technical support
For one-on-one help, you can talk to a technical support special-
ist during local business hours. Before calling, note your system
configuration and drive model number (STxxxx).
Location
Australia
England
Phone number
A.M.
A.M.
P.M.
, M–F)
61-2-9725-3366 (9:00
to 5:00
P.M.
,
44-1628-894083 (10:00
P.M. P.M.
, M–F)
to 1:00
2:00
to 5:00
A.M.
P.M.
,
France
33 1-41 86 10 86 (9:30
to 12:30
P.M.
P.M.
, M–F)
2:00
to 5:00
Germany
Disc: 49-89-140-9332; Tape: 49-89-140-9333
A.M.
P.M.
P.M.
P.M.
to 4:00 ,
(9:30
M–F)
to 12:30
, 2:00
Hong Kong 852-2368 9918
Korea
82-2-556-8241
A.M.
P.M.
to 12:00 , 2:00
P.M.
Singapore
65-488-7584 (9:00
P.M.
, M–F)
to 5:00
Taiwan
USA
886-2-514-2237
Please dial 1-800-SEAGATE or 408-456-4496
for the specific product telephone number.
A.M.
A.M.
P.M.
P.M.
to 5:00 ,
(6:00
Pacific time, M–F)
to 11:15
, 12:30
SeaTDD™ 408-944-9121
Using a telecommunications device for the deaf (TDD), you can
send questions or comments 24 hours daily and exchange mes-
A.M.
sages with a technical support specialist between 6:00
to
P.M.
11:15 A.M. and 12:30 P.M. to 5:00
through Friday.
(Pacific time) Monday
14
Barracuda 9 Installation Guide, Rev. B
Customer service centers
Seagate direct OEM, Distribution, and System Integrator cus-
tomers should contact their Seagate service representative for
warranty information. Other customers should contact their place
of purchase. Seagate offers comprehensive customer support
for all Seagate drives. These services are available worldwide.
Location
Phone number
FAX number
Asia Pacific and Australia
65-485-3595
65-485-4980
Europe, Middle East,
and Africa
31-2031-67300
31-2065-34320
Japan
USA
81-3-5462-2904 81-3-5462-2979
1-800-468-3472 405-949-6740
Other Americas (Brazil,
Canada, Mexico)
405-949-6706
405-949-6738
Manufacturer’s representatives
Brazil
MA Informatica
55-11-810-7794 55-21-253-6467
Canada
Memofix
Adtech
905-660-4936
905-812-8099
1-800-624-9857
905-660-8738
905-812-7807
Mexico
Abicom Seamax
SA DE CV
525-546-6965
525-546-4888
Barracuda 9 Installation Guide, Rev. B
15
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.
DC Power
Connector
Pin 1
Pin 1
J1
SCSI I/O
Connector
J2
J6
Figure 1. Barracuda 9 disc drive
(N model shown)
16
Barracuda 9 Installation Guide, Rev. B
Characteristics
ST19171
Interface
SCSI Fast-20 (also called
Ultra SCSI)1
Capacity
Unformatted
Formatted2
11.7 Gbytes
9.1 Gbytes
Recording
Cylinders (user)
Read/write data heads
Servo heads
5,274
20
Embedded
Seek time3
Average read
Average write
9.7 msec
10.7 msec
Disc rotation
RPM
Average latency
7,200 ±0.5%
4.17 msec
Internal transfer rate
80 to 124
(Mbits/sec, variable with zone)
Max sync. SCSI transfer rate
N
20 Mbytes/sec
40 Mbytes/sec
W/WD/WC/DC
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
3Includes on-board controller overhead.
Barracuda 9 Installation Guide, Rev. B
17
DC power requirements
Single-ended
+5V11 +12V
± 5%
Differential
± 5%2 ± 5% ± 5%2
Voltage regulation5
Amps
Maximum operating current1 0.93
Maximum starting current
0.89
1.17
0.89
Peak DC 3, 6
Peak AC 3
0.92
—
2.18
3.1
1.04
—
2.18
3.1
Delayed motor start (max)1, 4 0.82
0.08
0.90
0.08
Peak operating current
Typical DC 1
0.92
0.93
1.00
0.84
0.89
1.8
1.12
1.17
1.89
0.84
0.89
1.8
Maximum DC 1
Maximum (peak)
Track following (DC)
at OD 1
0.84
0.83
0.73
0.76
0.96
0.94
0.73
0.76
at ID 1
Read track
OD DC 1
AC
0.96
1.10
0.78
0.97
1.49
1.99
0.78
0.97
Seeking
Typical DC 1, 13
Maximum DC 1
Maximum (peak) AC
0.91
0.92
0.96
1.06
1.1
1.8
0.99
1.05
1.77
1.06
1.1
1.8
1Measured with an average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
18
Barracuda 9 Installation Guide, Rev. B
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. B
19
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 command
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.
20
Barracuda 9 Installation Guide, Rev. B
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
32
ST19171W
ST19171WD
36
41
ST19171WC ST19171DC
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. B
21
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.
22
Barracuda 9 Installation Guide, Rev. B
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.
Internal SCSI cable
Internal
Internal
Controller
SCSI device SCSI device
Terminate
Internal SCSI cable
External
SCSI
cable
Internal
Internal
SCSI device SCSI device
External
External
Controller
SCSI device SCSI device
Terminate
Figure 2. SCSI bus termination
Barracuda 9 Installation Guide, Rev. B
23
Terminator power
You usually will not need to change this option and can normally
leave the drive configured as it was shipped from the factory. For
information about how to change the terminator power option on
your drive, refer to the appropriate drive-specific section.
I/O circuits and 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, and WC models have a “wide” (16-bit) SCSI data bus
rather than the standard (non-wide) 8-bit SCSI data bus; how-
ever, you can use these wide drives on a standard (non-wide)
8-bit data bus.
Providing adequate cooling
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 evalu-
ate the air-flow design. The evaluation consists of ensuring that
the case temperature of certain critical components remains
within acceptable limits 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 around the head
and disc assembly (HDA). Also, choose the shortest possible
path between the air inlet and exit. This minimizes the distance
traveled by air that is heated by the drive and by other nearby
heat sources.
24
Barracuda 9 Installation Guide, Rev. B
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 directed from front to back, back to front, or side to side.
Barracuda 9 Installation Guide, Rev. B
25
Kühlung des Systems
Die Gehäusekonstruktion muß eine ausreichende Kühlung des
Laufwerkes gewährleisten. Die Umgebungstemperatur darf max-
imal 50°C betragen.
Die Produkthandbuch Barracuda 9 (Dokument 83329030)
enthalten Anweisungen zur Beurteilung der Luftstromkonstruk-
tion. Die Beurteilung muß sicherstellen, daß sich die Gehäuse-
temperatur bestimmter kritischer Komponenten bei
Laufwerkbetrieb innerhalb zugelassener Grenzen hält.
Wir empfehlen, das Laufwerk so zu orientieren oder den Luft-
strom so zu lenken, daß der geringste Luftstromwiderstand
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 Luftstrom-
verlauf wird durch die Lüfter gesteuert, die entweder Luft einbla-
sen oder abziehen. Generell kann der Luftstrom entweder von
vorne nach hinten oder von hinten nach vorne verlaufen.
26
Barracuda 9 Installation Guide, Rev. B
.
S E A G A T E
Above unit
Über der Einheit
Note. Air flows in the direction shown (back to front)
or in reverse direction (front to back)
Under unit
Unter der Einheit
Hinweis. Luftstrom in der angezeigten Richtung
(von vorne nach hinten) oder in umgekehrter
Richtung (von hinten nach vorne)
S E A G A T E
Above unit
Über der Einheit
Note. Air flows in the direction shown or
in reverse direction (side to side)
Under unit
Unter der Einheit
Hinweis. Luftstrom in der angezeigten Richtung oder in
umgekehrter Richtung (von Seite zu Seite)
Figure 3. Suggested air flow
Abbildung 3. Empfohlener Luftstromverlauf
Barracuda 9 Installation Guide, Rev. B
27
Mounting the drive and connecting cables
Do not touch the connector pins or any components on the con-
trol board without observing static-discharge precautions.
Always handle the drive by the frame only.
The drive may be mounted in any orientation (horizontally, verti-
cally, and any combination thereof); however, you must ensure
that the drive receives adequate air flow for cooling.
1. Mount the drive to the host system’s chassis using four 6-32
UNC screws. Two mounting holes are in each side of the
drive and there are four mounting holes in the bottom of the
drive.
The maximum length that the screws should extend into 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 seem to screw in easily, because this means the threads
are not properly aligned. In this case, back the screw out
and try again.
Installation des Laufwerkes
und Anschluß der Kabel
Beachten Sie beim Handhaben und Anfassen der Anschlußstifte
und Komponenten die Vorsichtsmaßnahmen zur Verhinderung
statischer Aufladung. Fassen Sie das Laufwerk nur am Rahmen
an.
Das Laufwerk kann in beliebiger Orientierung (horizontal, ver-
tikal oder schräg) installiert werden; jedoch muß dafür gesorgt
werden, daß ein ausreichender Luftstrom zur Kühlung des Lauf-
werkes vorhanden ist.
28
Barracuda 9 Installation Guide, Rev. B
1. Befestigen Sie das Laufwerk mit vier 6-32-UNC-Schrauben
am Gehäuse des Host-Systems. Die beiden Seiten des
Laufwerkes sind mit jeweils zwei Befestigungslöchern
versehen, die Unterseite des Laufwerkes weist vier weitere
Befestigungslöcher auf.
Gemessen von der Außenfläche des Gehäuses dürfen die
Schrauben maximal 3,81 mm in die Befestigungslöcher des
Gehüuses hineinragen. Die Schrauben müssen gleich-
mäßig, jedoch nicht zu fest, angezogen werden. Wenn sich
eine Schraube nicht ohne Widerstand einschrauben läßt,
sind die Gewinde nicht korrekt aneinander ausgerichtet. In
diesem Fall die Schraube nicht in das Gewindeloch
forcieren, sondern die Schraube herausnehmen und erneut
in das Gewindeloch einführen.
2. Verify that all connections between the drive and the host
system are correctly 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. B
29
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 Laufwerkes an. Das Kabel darf nicht gedehnt oder
gedrückt werden und es darf den Luftstrom zur Kühlung des
Systems nicht behindern.
Das Laufwerk wird über einen 4-poligen, neben dem SCSI-
Anschluß befestigten Steckverbinder mit Gleichstrom ver-
sorgt. Der Ausgang eines Netzteils muß SELV (safety extra
low voltage) nach IEC 950 entsprechen. Abbildung 4 zeigt
die Steckerbelegung für den Gleichstromanschluß. Zum
Anschluß des Gleichstromkabels an das Laufwerk das
Kabelende in den Gleichstromanschluß des Laufwerkes
stecken.
Pin
1
Power
Pin Gleichstrom
+12V
1
2
3
4
+12 V
2
+12V return
+ 5V return
+ 5V
+12 V Rückleitung
+ 5 V Rückleitung
+ 5 V
3
4
4
3
2
1
Figure 4. DC power connector
Abbildung 4. Gleichstromanschluß
30
Barracuda 9 Installation Guide, Rev. B
Note. Signal ground on the power control board (PCB) and the
head and disc assembly (HDA) are connected together in
this drive and you cannot separate them. The equipment
in which you have mounted the drive is connected
directly to the HDA and PCB without 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.
Hinweis:
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 Sie das Laufwerk
eingebaut haben, ist ohne elektrisch isolierende
Stoßdämpfer direkt an die HDA und PCB angeschlossen.
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 Systemgehäuse nicht an die HDA/PCB-
Erdung anschließen wollen, müssen Sie das Laufwerk
auf nichtleitende Weise (galvanisch isoliert) im Host-Sys-
Barracuda 9 Installation Guide, Rev. B
31
tem einbauen. Die daraus u.U. resultierende verstärkte
elektromagnetische Strahlung fällt in 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 previ-
ously installed hard disc drive if there is one.
3. Format the disc drive. Barracuda 9 disc drives 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 desk-
top system notes are provided below.
Quick reference desktop system notes
Note.
Refer to your system or utility manual for detailed instruc-
tions)
• DOS. Set the drive type in CMOS to “Zero,” “None,” or “No
hard drive installed.” Use FDISK.exe and FORMAT.exe.
• Macintosh. Use a third-party drive utility (Apple’s HD Setup
utility only works with Apple firmware drives).
32
Barracuda 9 Installation Guide, Rev. B
N drives
Setting the SCSI IND/NjuDmdpreivress section
Use the J6 connector to set the SCSI ID (see Figure 5). To
change the SCSI ID, install jumpers on the appropriate pins as
shown in the illustration.
Drive
Front
Jumper Plug
(enlarged to
show detail)
Pin 1
J6
L
E
D
R
E
S
R
E
S
Reserved
A
A
A
0
2
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
Figure 5. Setting the SCSI ID
Barracuda 9 Installation Guide, Rev. B
33
N drives
Terminating the drive
ST19171N drives are terminated with permanently mounted IC
active terminators. 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 termina-
tion by installing 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
J2
J6
SCSI I/O
Connector
J1
Drive
Front
DC Power
Connector
J2 Jumper Type
(enlarged to
show detail)
Figure 6. Terminating the drive
34
Barracuda 9 Installation Guide, Rev. B
N drives
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
J1
Drive
Front
J2 Jumper Type
(enlarged to
show detail)
DC Power
Connector
Figure 7. Setting terminator power jumpers
Barracuda 9 Installation Guide, Rev. B
35
N drives
Other applicable jumper options
Several other jumper options are available as illustrated.
Drive with
J2
HDA up, PCB
Pin 1
down, viewed
from front
Pin 1
HDA
Reserved
Delay Motor Start option
(valid only if the Enable
Motor Start jumper is
not connected)
J6
L
E
D
R
E
S
R
E
S
Reserved
A
A
A
0
2
1
Disable the Delay Motor
Start option (default).
Reserved
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.
11
12
Remote
LED
CATH
Shipped with cover installed.
Do not remove.
Do not install jumpers
on these four positions.
Motor Start option
Disable motor start
(default). The drive
starts according to the
Delay Motor Start option.
J6
J6
Drive Front
Jumper Type
(enlarged to
show detail)
Enable motor start. The
drive waits for the Start
Unit command from the
host before starting the
spindle motor.
Pin 1
End
Write Protect option
J2
Write protect = Off
(enables writing –
default).
Pin 1
DC Power
Connector
Write protect = On
(disables writing).
Parity Check option
J1
Enable parity check of
SCSI bus (default).
SCSI I/O
Connector
J2 Jumper Type
(enlarged to
show detail)
Disable parity check.
Figure 8. Additional jumper options
36
W/WD drives
Barracuda 9 Installation Guide, Rev. B
Setting the SCSIWID/WjuDmdpreivrses section
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)
Pin 1
J6
L
E
D
R
E
S
Reserved
A
A
A
A
0
3
2
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
SCSI ID = 14
SCSI ID = 15
Figure 9. Setting the SCSI ID
Barracuda 9 Installation Guide, Rev. B
37
W/WD drives
Drive HDA (rear view, PCB facing downward)
J1 Auxiliary
Pin 1
Pin 1
4P
3P2P
1P
Pin 12
DC Power
Connector
68 Pin
SCSI I/O Connector
PCB
Pin 1
Pin 1
J1 Auxiliary
J1 Auxiliary
A
A
A
A
A
A
A
A
1 0
3
2
1
0
3
2
SCSI ID = 0
(default)
*Fault LED
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
*Vendor Unique
*Spindle Sync
*Activity LED
SCSI ID = 4
SCSI ID = 5
No Connection
Ground
SCSI ID = 6
SCSI ID = 7
SCSI ID = 8
+5V
*Pins 2, 4, 6, and 8 are driven low
for 250 ms after PWR ON and reset
to allow jumper-selectable SCSI ID.
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
Figure 10. Using the J1 auxiliary jumper block
38
W/WD drives
Terminating the drive
Barracuda 9 Installation Guide, Rev. B
ST19171W drives are terminated with permanently mounted IC
active terminators. 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 termination by installing
a jumper on pins 15 and 16 of connector J2 (see Figure 11).
Note.
Use active (ANSI SCSI-2 Alternative 2) terminators when
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 differential termination to these drives when termination
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
SCSI I/O
Connector
J1
Drive
Front
DC Power
Connector
J2 Jumper Type
(enlarged to
show detail)
Figure 11. Terminating the drive (ST19171W shown)
Barracuda 9 Installation Guide, Rev. B
39
W/WD drives
Terminator power
There are three possible terminator power configurations for
ST19171W drives (see Figure 12). You will not normally need 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 P
ST19171W
Term. Power from Drive (default)
Term. Power to SCSI Bus
Term. Power from SCSI Bus
Position A
ST19171WD
Term. Power to SCSI Bus (default)
Host adapter or other device provides
term. power to external terminator.
J2
J6
SCSI I/O
Connector
J1
Drive
Front
J2 Jumper Type
(enlarged to
show detail)
DC Power
Connector
Figure 12. Setting terminator power jumpers
40
W/WD drives
Barracuda 9 Installation Guide, Rev. B
Other applicable jumper options
Other option jumpers are available as illustrated below.
Drive with
J2
HDA up, PCB
Pin 1
down, viewed
Pin 1
from front
HDA
Reserved
Delay Motor Start option
(valid only if the Enable
Motor Start jumper is
not connected)
J6
L
E
D
R
E
S
R
E
S
Reserved
A
A
A
0
2
1
Disable the Delay Motor
Start option (default).
Reserved
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.
11
12
Remote
LED
CATH
Shipped with cover installed.
Do not remove.
Do not install jumpers
on these four positions.
Motor Start option
Disable motor start
(default). The drive
starts according to the
Delay Motor Start option.
J6
J6
Drive Front
Jumper Type
(enlarged to
show detail)
Enable motor start. The
drive waits for the Start
Unit command from the
host before starting the
spindle motor.
Pin 1
End
Write Protect option
J2
Write protect = Off
(enables writing –
default).
Pin 1
DC Power
Connector
Write protect = On
(disables writing).
Parity Check option
J1
Enable parity check of
SCSI bus (default).
SCSI I/O
Connector
J2 Jumper Type
(enlarged to
show detail)
Disable parity check.
Figure 13. Additional jumper options
Barracuda 9 Installation Guide, Rev. B
41
WC/DC drives
Setting the SCSIWIDC/jDumCpderirvses section
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 internal termi-
nators or any other way of adding internal termination to the
drive. You must provide external termination to these drives
when termination is required.
42
Barracuda 9 Installation Guide, Rev. B
WC/DC drives
Applicable jumper options
Option jumpers are available as illustrated below.
Pin 1
J2
R
R R R
E D M W P E E E
S S E P D S S S
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.
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.
J2
J6
SCSI I/O
Connector
J1
Drive
Front
J2 Jumper Type
(enlarged to
show detail)
DC Power
Connector
Figure 14. Jumper options
Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, CA 95066-4544, USA
Publication Number: 83329020, Rev. B, Printed in USA
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