Seagate Computer Monitor ST19171DC User Guide

Barracuda 9  
Disc Drive  
ST19171N/W/WD/WC/DC  
Installation Guide  
 
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  
+5V11 +12V  
± 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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