BARRACUDA 4 Family
ST15150N/ND/DC
ST15150W/WD/WC
Installation Guide
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Barracuda 4 Installation Guide, Rev. E
1
Preface
ThismanualcontainsinformationforusersofSeagate®
ST15150N/ND/DC and ST15150W/WD/WCBarracuda™ 4
SCSI disc drives. It provides support services, perfor-
mance specifications, and initial setup information. Ad-
ditional information is available in the Barracuda 4
Product Manual (part number 83328880). Contact your
Seagate sales representative if you need to order this
publication.
Electrostatic discharge protection
Caution. Removal of circuit boards by personnel not
performing depot repair will damage com-
ponents and may void the warranty.
All drive electronic assemblies are sensitive to static
electricity, due to the electrostatically sensitive de-
vices used within the drive circuitry. Although some
devices such as metal-oxide semiconductors are ex-
tremely sensitive, all semiconductors, aswell as some
resistors and capacitors, may be damaged or de-
graded by exposure to static electricity.
Electrostatic damage to electronic devices may be
caused by thedirect discharge of a charged conductor
or by exposure to the static fields surrounding charged
objects. To avoid damaging drive electronic assem-
blies, observe the following precautions when installing
or servicing the drive:
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2
Barracuda 4 Installation Guide, Rev. E
• 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).Connectionmaybemadetoanygrounded
metalassembly.Asageneralrule,rememberthatyou
andthedriveelectronicsmustallbegroundedtoavoid
potentially damaging static discharges.
• 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, dis-
charge the carrier or tray prior to inserting it into the
system.
Important safety information and precautions
Caution. Use forced-air ventilation when bench-test-
ing the drive to ensure proper cooling of
drive components.
Use proper safety and repair techniques for safe, reli-
able operation of this unit. Service should be done only
byqualifiedpersons. Werecommendtheproceduresin
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.
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Barracuda 4 Installation Guide, Rev. E
3
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 others. The cau-
tions point out conditions or practices that may damage
the unit, possibly making it unsafe for use.
These warnings and cautions are not exhaustive. We
cannot possibly know, evaluate, and advise you of all
the 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.
Always observe the following warnings and precau-
tions:
• 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 repair-
ing the unit.
• Use caution when troubleshooting a unit that has
voltages present. Turn off power to the unit before
servicing it.
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4
Barracuda 4 Installation Guide, Rev. E
• Wearsafetyshoeswhenremovingorreplacingheavy
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
attention to the top where temperatures 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 performing depot repair will damage
components and may void the warranty.
• Do not remove the head and disc assembly (HDA)
from the drive chassis. Return the entire drive for
depot repair if the HDA is defective.
• Do not attempt to disassemble the HDA. It is not field
repairable. If the sealed HDA is opened by personnel
not performing depot repair, this will damage compo-
nents and void the warranty.
As a component, this drive is designed to be installed
and operated in accordance with UL1950, IEC950,
EN60950, CSA C22.2 No. 950-M89, and VDE0805.
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Barracuda 4 Installation Guide, Rev. E
5
Seagate takes all reasonable steps to ensure that its
products are certifiable to currently accepted stan-
dards. Typical applications of these disc drives include
customer packaging and subsystem design. Safety
agencies conditionally certify component assemblies,
such asthe Barracuda disc drive, based on their final
acceptability in the end-use product. The subsystem
designers are responsible for meeting these condi-
tions 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 volt-
ages.
This unit is a component part and as such is not meant
to comply with FCC or similar national requirements as
a stand-alone unit. Engineering radiated emissions
test results are available through the Seagate Safety
Department to assist the subsystem designer.
Wichtige Sicherheitshinweise
Vorsicht. Beim Testen des Laufwerks auf dem
Prüftisch ist Fremdbelüftung vorzusehen, um eine
ausreichende Kühlung der Laufwerkkomponenten
sicherzustellen.
Verwenden Sie geeignete Sicherheits- und
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6
Barracuda 4 Installation Guide, Rev. E
Reparaturverfahren, um den sicheren, zuverlässigen
Betrieb dieser Einheit zu gewährleisten. Reparaturen
dürfen nur von qualifiziertem Fachpersonal
vorgenommen werden. Wir empfehlen die Verfahren in
diesem Handbuch als effektive Methoden zur
Wartung und Reparatur der Einheit. Einige Verfahren
erfordern Spezialwerkzeuge; diese müssen zur
sachgemäßen Ausführung der Wartungsarbeiten und
aus Sicherheitsgründen den Empfehlungen
entsprechend verwendet werden.
Die Verfahren in diesem Handbuch und die Aufkleber
auf dem Gerät enthalten Warn- und Vorsichtshinweise.
Diese Hinweise sind sorgfältig durchzulesen und zu
beachten, um das Risiko von Verletzungen auf ein
Mindestmaß zu beschränken oder ganz zu vermeiden.
Die Warnhinweise machen auf Situationen oder
Praktiken aufmerksam, die Sie oder andere gefährden
könnten.DieVorsichtshinweisemachenaufSituationen
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
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Barracuda 4 Installation Guide, Rev. E
7
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
Vorsichtshinweise:
• Führen Sie alle Wartungsarbeiten entsprechend den
Anweisungen in diesem Handbuch aus.
• Beachten Sie alle Warn- und Vorsichtshinweise in
diesem Handbuch.
• Treffen Sie beim Betrieb oder bei der Reparatur der
Einheit angemessene Sicherheitsvorkehrungen.
• 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 vorgegebenen Grenzwerte nicht
übersteigt. Wenn Einheiten vertikal übereinander
betestigt werden, achten Sie besonders auf den
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8
Barracuda 4 Installation Guide, Rev. E
oberen Stapelbereich, da dort die Temperatur
gewöhnlich am höchsten ist.
• Befolgen Sie die oben unter “Electrostatic Discharge
Protection” angegebenen Sicherheitsmaßnahmen.
• Nehmen Sie keine Platinen aus dem
Laufwerkgehäuse. Wenn eine Platine defekt ist, muß
das gesamte Laufwerk zur Reparatur eingeschickt
werden.DieHerausnahmevonPlatinendurchandere
Personen als die für die werkseitige Reparatur
zuständigen kann zu einer Beschädigung der
Komponenten undErlöschendesGarantieanspruchs
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
auseinandergenommen werden! Öffnen der
versiegelten HDA durch andere Personen als die für
die werkseitige Reparatur zuständigen hat eine
Beschädigung der Komponenten und Erlöschen des
Garantieanspruchs zur Folge.
Als Teilkomponente ist dieses Laufwerk für die Instal-
lation und den Betrieb in Übereinstimmung mit UL
1950, IEC950, EN60950, CSA C22.2 950-M89 und
VDE0805 vorgesehen.
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Barracuda 4 Installation Guide, Rev. E
9
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
KonstruktionvonUntersystemen.Sicherheitsbehörden
gewähren eine bedingte Zulassung für Komponenten
wie das Barracuda-Festplattenlaufwerk vorbehaltlich
der endgültigen Zulassung 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 Einhaltung 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
elektromagnetische Strahlung sind für Designer von
Untersystemen auf Anfrage von der Seagate-
Sicherheitsabteilung erhältlich.
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10
Barracuda 4 Installation Guide, Rev. E
Technical support services
Seagate Technology provides technical support litera-
ture and diagnostic utilities to authorized distributors.
Please contact your dealer for technical support and
installation troubleshooting. Producttechnicalsupport
is available for all Seagate products by calling the
SeaFAX™,SeaFONE™,SeaTDD™,orSeaBOARD™
services. These are toll calls if you dial from outside of
the number’s local dialing area. Seagate also has a
forum on CompuServe.
SeaFAX:
USA (408) 438-2620; England 44-62-847-7080
Use a touch-tone telephone to access Seagate’s auto-
mated FAX system and select technical support infor-
mationbyreturnFAX. Thisserviceisavailable24hours
a day, 7 days a week.
CompuServe Forum
Online support for Seagate products is available on
CompuServe. This includes an extensive question and
answermessagebase,downloadableutilities,anddocu-
mentation files in Adobe™ Acrobat™ format which you
can download and view from your own computer. Type
“Go Seagate” to access this service.
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Barracuda 4 Installation Guide, Rev. E
11
SeaFONE: (408) 438-8222
Technical support specialists are available 8:00 A.M.to
5:00 P.M. PST, Monday through Friday. Recorded tech-
nical information for selected Seagate products is pro-
vided while you are on hold. Recordings are accessible
24 hours a day, 7 days a week.
SeaTDD: (408) 438-5382
TDD is a telecommunication device for the deaf where
two people can communicate using a keyboard con-
nected to the phone line. A TDD device is required to
access this service, which is available 8:00 A.M. to
5:00 P.M. PST, Monday through Friday.
SeaBOARD:
The Seagate Technical Support Bulletin Board System
(BBS) is available 24 hours a day, 7 days a week. A
modem is required to access this service. The commu-
nications software must be set for 8 data bits, no parity,
and 1 stop bit (8N1). All BBS numbers operate at 9600
baud max. With this service you can access:
• Specifications and jumper configurations for Seagate
products
• Reprints of Seagate documentation
• A directory of information and helpful utilities that you
can download to your own computer
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12
Barracuda 4 Installation Guide, Rev. E
Telephone
number
Location
USA, Mexico, Latin America
England
Germany
Singapore
Australia
Canada
(408) 438-8771
44-62-847-8011
49-89-140-9331
65-292-6973
61-2-756-2359
(416) 856-5581
33-1-40-67-1034
82-2-556-7294
France
Korea
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Barracuda 4 Installation Guide, Rev. E
13
General description
Barracuda 4 disc drives are high-speed data storage
devices.Thereareseveralmodelsofthisdiscdrive(see
Figure 1, 2, or 3). Specifications and power require-
ments for the drives are listed following the figures.
Thedriveisacomponentforinstallationinanenclosure
designed for the drive. This is often a rack within the
systemoranexternalenclosuredesignedtohouseone
or more disc drives. In either case, the disc drive must
receive adequate cooling (refer to “Providing adequate
cooling”) and it must be sufficiently grounded and
shielded from emissions. The Barracuda 4 Product
Manual (part number 83328880) contains guidelines
for a properly designed enclosure.
SCSI I/O
Connector
J01
J4
DC Power Connector
Figure 1. Barracuda 4 disc drive (N/ND)
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Barracuda 4 Installation Guide, Rev. E
SCSI I/O
Connector
Pin 1
J5
J01
J4
DC Power
Connector
Figure 2. Barracuda 4 disc drive (W/WD)
J6
J4
Figure 3. Barracuda 4 disc drive (WC/DC)
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Barracuda 4 Installation Guide, Rev. E
15
Characteristics of ST15150 drives
N/ND
W/WD/WC/DC
Fast & Wide
SCSI-2 Interface1
Fast
Capacity
Unformatted
5,062 Mbytes 5,062 Mbytes
4,294 Mbytes 4,294 Mbytes
Formatted2
Recording
Cylinders (user accessible) 3,711
3,711
21
1
Read/Write heads
Servo heads
21
1
Avg bytes/track
64,160
64,160
Modulation
RLL 1,7 code RLL 1,7 code
Synchronous SCSI rate
Max burst transfer
Seek time3
10 Mbytes/sec 20 Mbytes/sec
Average read
Average write
8.0 msec
9.0 msec
8.0 msec
9.0 msec
Disc rotation
RPM
7,200
7,200
Average latency
4.17 msec
4.17 msec
Multi-segmented cache
Physical
Available to user
1,024 Kbytes 1,024 Kbytes
977 Kbytes 977 Kbytes
1Can also be operated according to SCSI-1 protocol.
2Standard factory units are formatted as follows:
512 data bytes per sector
9 spare sectors per cylinder
1 cylinder at the inner track reserved for spares
3Not including on-board controller overhead.
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Barracuda 4 Installation Guide, Rev. E
DC power requirements
N/W/WC
ND/WD/DC
+5V11 +12V
+5V11 +12V
Voltage regulation5
± 5% ± 5%2 ± 5% ± 5%2
Amps
Max operating current
DC 3σ 1
0.95
0.63
0.95
0.78
1.19
0.69
0.95
0.78
Average idle current
DC X 1, 12
Max starting current
Peak DC 3σ 3, 6
Peak AC 3σ 3
0.93
–
2.18
3.10
1.02
–
2.18
3.10
Delay motor start
Max DC 3σ 1, 4
0.95
0.10
0.94
0.10
Peak operating current
Typical DC X 1, 10
Max DC 3σ 1
0.92
0.95
1.08
0.86
0.95
1.8
1.13
1.19
1.95
0.86
0.95
1.8
Max (peak) AC 3σ
Track following at
OD DC X 1
0.91
0.89
0.80
0.86
0.97
0.96
0.80
0.86
ID DC X 1
Read track
OD DC 3σ 1, 14
AC 3σ
0.97
1.05
0.89
1.10
1.39
1.96
0.89
1.10
Seeking
Typical DC X 1, 13
Max DC 3σ 1
Max (peak) AC 3σ
0.91
0.92
1.05
1.10
1.20
1.87
0.98
1.07
1.7
1.10
1.20
1.87
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Barracuda 4 Installation Guide, Rev. E
17
11Measured with average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
12A –10% tolerance is permissible during initial start of
spindle and must return to ±5% before 7,200 RPM is
reached. The ±5% must be maintained after the drive
signifiesthatitspower-upsequencehasbeencompleted
and that the drive is able to accept selection by the host
initiator.
13See the +12V current profile in the Barracuda 4 Product
Manual (publication number 83328880).
14This condition occurs when the Motor Start Option is
enabled and the drive has not yet received a Start Motor
command.
15See “Conducted noise immunity” in the Barracuda 4
Product Manual. Specified voltage tolerance is inclusive
of ripple, noise, and transient response.
16At power-up, the motor current regulator limits the 12V
current to an average value of less than 2.18A, although
instantaneouspeaksmayexceedthisvalue.Thesepeaks
should measure 5 msec duration or less.
17Minimum current loading for each supply voltage is not
less than 3% of the maximum operating current shown.
18The +5V and +12V supplies employ separate ground
returns.
No terminator power. See Section 11.7.3.4 in the Barra-
cuda 4 Product Manual.
continued
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18
Barracuda 4 Installation Guide, Rev. E
continued from previous page
19Where power is provided to multiple drives from a com-
mon supply, careful consideration for individual drive
power requirements should be noted. Where multiple
units are powered on simultaneously, the peak starting
current must be available to each device.
10Operating condition is defined as a third stroke seek at
ODandreadonetrack.Acommandisissuedevery0.063
secforN/W/WD/WC/DCdrives(0.075secforNDdrives).
11No terminator power. See 11.7.3.4 in the Barracuda 4
Product Manual.
12All power saving features enabled; ASA II code only.
13Seeking is defined as a third stroke seek at OD. A
command is issued every 20 msec.
14Read track is defined as repeat reads of track 15 with a
60% duty cycle for N/ND drives, 74% duty cycle for W
drives, 32% duty cycle for WC drives, 44% duty cycle for
WD drives, and 50% duty cycle for DC drives.
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Barracuda 4 Installation Guide, Rev. E
19
Initial setup information
The general information beginning on this page applies
to all of the Barracuda 4 models. After reading the
general information topics, refer to the appropriate
drive-specific section listed below for additional infor-
mation about configuring and installing your particular
model.
Drive models
Page
ST15150N/ND
ST15150W/WD
ST15150WC/DC
35
40
46
General information
Thefollowinggeneralinformationtopicsarediscussed:
• SCSI ID jumpers
• Drive termination
• Synchronizing spindles
• Other applicable jumper options
• Providing adequate cooling
• Mounting the drive and connecting cables
• Formatting the drive
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20
Barracuda 4 Installation Guide, Rev. E
SCSI ID jumpers
Each device on the SCSI chain must have a unique
SCSI ID. The host system’s SCSI controller usually
uses the highest-numbered ID available; therefore the
lower-numbered SCSI IDs are normally used for other
SCSI devices such as this Barracuda disc drive.
Most Barracuda disc drives are factory set with the
SCSI ID set at 0. To change the SCSI ID, refer to the
appropriate drive section for your model.
Note. Most SCSI controllers (host adapters) allow you
toskipaSCSIID.Forexample,youcanhaveID0,
ID1, and ID3 (skipping ID2). Other controllers do
not allow this; refer to your system or controller
user’s manual for details about its requirements
for proper SCSI device installation.
After completing the installation process, ifthe drive’s
LED does not show on/off activity when the host is
trying to communicatewith 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
manualtoensurethat you havenot violatedits SCSIID
numbering recommendations.
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Barracuda 4 Installation Guide, Rev. E
21
Drive termination
If you are installing the drive in a system that has other
SCSI devices installed, terminate only the end devices
on the SCSI chain. A SCSI “device” is any disc drive,
scanner, tape backup unit, or other piece of hardware
connected to your system using the SCSI bus.
ThetopexampleinFigure4showsaninternalharddisc
at one end of the SCSI bus with the SCSI controller at
the other end (both are terminated). The bottom ex-
ample shows two additional SCSI devices connected
externally—this means the SCSI controller is no longer
on the end of the SCSI chain and should not be termi-
nated.
For informationabouthowtoterminateyourdrive, 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 4. SCSI bus termination
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22
Barracuda 4 Installation Guide, Rev. E
Terminator power
You usually will not need to changethisoption 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.
Synchronizing spindles (optional)
If you are installing two or more Barracuda drives, you
may synchronize their spindles to reduce the latency
associated with switching from one drive to another.
Spindle sync cables are used to connect the drives.
After connecting each drive with spindle sync cables,
designateamasterspindlesyncreferencesource. This
master source is usually a disc drive located on the
sameSCSIbusastheotherdrivesyouwanttosynchro-
nize with. To designate a drive as the master, use SCSI
interfacecommands.RefertotheBarracuda 4 Product
Manual for information about using these commands.
For information about how to synchronize the spindles
for your drive, refer to the appropriate drive-specific
section.
Other applicable jumper options
Barracuda 4 drives are designed for use in a variety of
systems. Someinstallationsmayrequireyoutochange
one or more of the other jumpers to meet specific
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Barracuda 4 Installation Guide, Rev. E
23
system requirements; however, in most cases, you will
not need to change any of these jumpers for normal
drive operation.
Providing adequate cooling
Theenclosuredesignmustensureadequatecoolingfor
the drive. The maximum ambient temperature is 50oC.
The drive’s product manual (83328880) describes how
to evaluate 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.
Figure 5 shows two design approaches with one or
more fans used to generate air flow. The air-flow pat-
terns 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.
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24
Barracuda 4 Installation Guide, Rev. E
Kühlung des Systems
Die Gehäusekonstruktion muß eine ausreichende
Kühlung des Laufwerkes gewährleisten. Die
Umgebungstemperatur darf maximal 50oC betragen.
Die Produkthandbuch Barracuda 4 (Dokument
83328880) enthalten Anweisungen zur Beurteilung der
Luftstromkonstruktion. Die Beurteilung muß
sicherstellen, daß sich die Gehäusetemperatur
bestimmterkritischerKomponentenbeiLaufwerkbetrieb
innerhalb zugelassener Grenzen hält.
Wirempfehlen,dasLaufwerksozuorientierenoderden
Luftstrom so zu lenken, daß der geringste
Luftstromwiderstand erzeugt wird und gleichzeitig ein
Luftstrom über den Platinen und um die Kopf- und
Festplatteneinheit(HDA)gegebenist.WählenSieeinen
möglichstkurzenWegzwischenLufteinlaßund-auslaß.
Dadurch wird die Strecke, die die vom Laufwerk und
anderennahegelegenenHitzequellenaufgewärmteLuft
zurücklegt, auf ein Minimum beschränkt.
Abbildung5zeigtzweiKonstruktionsmöglichkeiten,bei
deneneinodermehrereLüfterdenLuftstromerzeugen.
Der Luftstromverlauf wird durch die Lüfter gesteuert,
die entweder Luft einblasen oder abziehen. Generell
kann der Luftstrom entweder von vorne nach hinten
oder von hinten nach vorne verlaufen.
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Barracuda 4 Installation Guide, Rev. E
25
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)
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 5. Suggested air flow
Abbildung 5. Empfohlener Luftstromverlauf
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26
Barracuda 4 Installation Guide, Rev. E
Mounting the drive and connecting cables
Note. ThismountingproceduredoesnotapplytoWCor
DC model drives. To mount a WC or DC drive,
plug the drive into the system's single connector
attachment (SCA) position on the system's back
panel.
Do not touch the connector pins or any components on
the control board without observing static-discharge
precautions. Always handle the drive by the frame only.
The drive may be mounted in any orientation (horizon-
tally, vertically, andanycombinationthereof);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. See Figures 6, 7 or 8.
The maximum length that the screws should ex-
tend 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.
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Barracuda 4 Installation Guide, Rev. E
27
Installation des Laufwerkes
und Anschluß der Kabel
Beachten Sie beim Handhaben und Anfassen der
Anschlußstifte und Komponenten die
Vorsichtsmaßnahmen zur Verhinderung statischer
Aufladung. FassenSiedasLaufwerknuramRahmenan.
Das Laufwerk kann in beliebiger Orientierung (horizon-
tal, vertikal oder schräg) installiert werden; jedoch muß
dafürgesorgtwerden,daßeinausreichenderLuftstrom
zur Kühlung des Laufwerkes vorhanden ist.
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. Siehe Abbildung 6, 7 und Abbildung 8.
Gemessen von der Außenfläche des Gehäuses
dürfen die Schrauben maximal 3,81 mm in die
Befestigungslöcher des Gehüuses hineinragen. Die
Schrauben müssen gleichmäßig, 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,sonderndieSchraubeherausnehmenund
erneut in das Gewindeloch einführen.
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28
Barracuda 4 Installation Guide, Rev. E
T
U
[1]
C
R
[3]
P
N
F
D
E
K
L
A
M
Notes:
[1] Mounting holes two on each
side, 6-32 UNC. Max screw
length into side of drive is
0.15 in. (3.81 mm).
[2] Mounting holes four on
B
bottom, 6-32 UNC. Max
screw length into bottom of
drive is 0.15 in. (3.81 mm).
[3] Power and interface
connections.
[4] Decorative front panel.
[2]
Inches
Millimeters
A
B
C
D
E
F
G
H
J
5.740 ± 0.010 145.80 ± .25
4.000 ± 0.010 101.60 ± .25
G
1.620 ± 0.034
41.14 ± .86
.615 ± 0.020
15.68 ± .50
4.000 ± 0.005 101.60 ± .13
.250 ± 0.005
1.750 ± 0.010
3.750 ± 0.010
2.370 ± 0.010
6.35 ± .13
44.45 ± .25
95.25 ± .25
60.20 ± .25
K
L
5.420 ± 0.020 137.69 ± .50
5.565 ± 0.010 141.35 ± .25
5.965 ± 0.020 151.41 ± .50
J
M
N
P
R
S
T
.195 ± 0.015
.360 ± 0.015
1.725 ± 0.010
4.95 ± .38
9.14 ± .38
43.82 ± .25
4.100 ± 0.010 104.14 ± .25
.190 ± 0.010
4.83 ± .25
H
U
0.015 max
0.381 max
[4]
S
Figure 6. Dimensions (ST15150N/ND)
Abbildung 6. Laufwerkabmessungen
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Barracuda 4 Installation Guide, Rev. E
29
T
.050 minimum clearance
U
[1]
C
R
[3]
P
F
N
D
E
K
L
A
M
Notes:
[1] Mounting holes two on each
side, 6-32 UNC. Max screw
length into side of drive is
0.15 in. (3.81 mm).
[2] Mounting holes four on
bottom, 6-32 UNC. Max
screw length into bottom of
drive is 0.15 in. (3.81 mm).
V
B
[3] Power and interface
connections.
[4] Decorative front panel.
[2]
Inches
Millimeters
A
B
C
D
E
F
G
H
J
5.740 ± 0.010 145.80 ± .25
4.000 ± 0.010 101.60 ± .25
G
1.620 ± 0.028
41.14 ± .68
.615 ± 0.020
15.68 ± .50
4.000 ± 0.005 101.60 ± .13
.250 ± 0.005
1.750 ± 0.010
3.750 ± 0.010
2.370 ± 0.010
6.35 ± .13
44.45 ± .25
95.25 ± .25
60.20 ± .25
K
L
5.420 ± 0.020 137.69 ± .50
5.565 ± 0.010 141.35 ± .25
5.968 ± 0.035 151.58 ± .90
J
M
N
P
R
S
T
.190 ± 0.015
.347 ± 0.015
1.725 ± 0.010
4.826 ± .38
8.81 ± .38
43.82 ± .25
4.100 ± 0.010 104.14 ± .25
.190 ± 0.010
0.015 max
4.83 ± .25
0.381 max
6.74 ± .50
U
V
H
0.265 ± 0.020
[4]
S
Figure 7. Dimensions (ST15150W/WD)
Abbildung 7. Laufwerkabmessungen
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30
Barracuda 4 Installation Guide, Rev. E
T
U
0.050" minimum clearance
[1]
C
R
[3]
P
N
F
D
E
K
L
A
M
Notes:
[1]
Mounting holes two on each side,
6-32 UNC. Max screw length into
side of drive is 0.15 in. (3.81 mm).
[2]
Mounting holes four on bottom,
6-32 UNC. Max screw length into
bottom of drive is 0.15 in. (3.81 mm).
[5]
B
[3]
[4]
[5]
Power and interface connections.
Decorative front panel.
Connector is centered within “B”
dimension ± 0.02 in.
[2]
Inches
Millimeters
A
5.740
4.000
1.615
.620
4.000
.250
1.750
3.750
2.365
5.420
5.565
5.968
.181
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.010 145.80 ± .25
B
C
D
E
F
G
H
J
0.010 101.60 ± .25
G
0.034
0.020
41.02 ± .86
15.75 ± .50
0.005 101.60 ± .13
0.005
0.010
0.010
0.010
6.35 ± .13
44.45 ± .25
95.25 ± .25
60.07 ± .25
K
L
0.020 137.52 ± .50
0.010 141.22 ± .25
0.035 151.58 ± .90
J
M
N
P
R
S
T
0.015
0.015
0.010
4.597 ± .38
8.20 ± .38
43.82 ± .25
.323
1.725
4.100
.190
0.010 104.14 ± .25
0.010
4.83 ± .25
0.381 max
8.50 ± .50
U
V
0.015 max
0.265
0.020
H
±
[4]
S
Figure 8. Dimensions (ST15150WC/DC)
Abbildung 8. Laufwerkabmessungen
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Barracuda 4 Installation Guide, Rev. E
31
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 SCSI ID jump-
ers (see Figure 10, 15 or 21).
3. Stellen Sie sicher, daß die SCSI-Kennungsbrncken.
Siehe Abbildung 10, 15 und Abbildung 21.
4. Connect the 50-pin SCSI cable into the drive’s SCSI
connector (shown earlier in Figures 1, 2 and 3). 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 con-
nector mounted next to the SCSI connector. The
output of a power supply must meet SELV (safety
extra low voltage) as defined in IEC 950. Figure 9
provides the pin information for the DC power con-
nector. 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 50-polige SCSI-Kabel an den
SCSI-SteckverbinderdesLaufwerkesan(wiebereits
inAbbildung1,2undAbbildung3gezeigt).DasKabel
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32
Barracuda 4 Installation Guide, Rev. E
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 versorgt. Der Ausgang eines Netzteils
muß SELV (safety extra low voltage) nach IEC 950
entsprechen.Abbildung9zeigtdieSteckerbelegund
für den Gleichstromanschluß. Zum Anschluß des
Gleichstromkabels an das Laufwerk das Kabelende
indenGleichstromanschlußdesLaufwerkesstecken.
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 9. DC power connector
Abbildung 9. Gleichstromanschluß
Note. Signal ground on the power control board (PCB)
and the head and disc assembly (HDA) are con-
nected together in this drive and you cannot
separatethem. Theequipmentinwhichyouhave
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Barracuda 4 Installation Guide, Rev. E
33
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)undderKopf-undFestplatteneinheit(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
werden, indem Sie eine möglichst große leitende
Kontakfläche zwischen der HDA-Erdung und der
Systemerdung vorsehen.
Wenn Sie das Systemgehäuse nicht an die HDA/
PCB-Erdung anschließen wollen, müssen Sie
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34
Barracuda 4 Installation Guide, Rev. E
dasLaufwerkaufnichtleitendeWeise(galvanisch
isoliert) imHost-Systemeinbauen.Diedarausu.U.
resultierende verstärkte elektromagnetische
Strahlung fällt in den Zuständigkeitsbereich 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 you understand this principle before
formatting any hard disc drive.
It is not necessary to format a drive that
has been previously used to store data, un-
less your intention is to erase all user data.
1. Turn on DC power.
2. Boot the system from a system floppy disc or from a
previously installed hard disc drive if there is one.
3. Format the drive. The Barracuda 4 disc drive is
designed to operate with a variety of operating sys-
tems. Your system or SCSI controller manuals have
informationaboutformattingandsettingupthedrive.
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Barracuda 4 Installation Guide, Rev. E
35
Setting the SCSI ID jumpers
Use the J4 connector to set the SCSI ID (Figure 10). To
change the SCSI ID, install jumpers on the appropriate
pins as shown in the illustration.
SCSI
Connector
DC Power
Connector
Pin 1
J4
ID1
ID2
ID0
Select SCSI ID by placing
jumpers as shown below.
J4
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 10. Setting the SCSI ID
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36
Barracuda 4 Installation Guide, Rev. E
Terminating the drive
To terminate the ST15150N drive, enable the perma-
nently mounted IC active terminators by installing an
Enable Drive Terminator jumper on J01 pins 1 and 2 as
shown in Figure 11. If you install one of these models
and it is not on the end of the SCSI bus, remove the
jumpertodisablethepermanentlymountedICtermina-
tors and thereby remove internal termination from the
drive.
The ST15150ND drive does not have internal termina-
torsoranywayofaddinginternaltermination. Youmust
provideexternalactivetermination(ANSISCSI-2Alter-
native 2) to the drive when termination is required.
J4
Pin 1
J01
Pin 3
Pin 1
J01
Pin 2
Enable drive terminator.
Disable drive terminator.
Figure 11. Terminating the drive
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Barracuda 4 Installation Guide, Rev. E
37
Terminator power
Therearefourpossibleterminatorpowerconfigurations
for the ST15150N drive (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.
The ST15150ND drive should be configured with a
jumper connecting J01 pins 1 and 3 (and no jumper on
J01 pins 2 and 4) as illustrated in Figure 12.
Power
Connector
J4
J01
Pin 3
Pin 1
J01
ST15150N
Pin 2
Term. power from drive (default).
Term. power from SCSI bus.
Term. power to SCSI bus.
Term. power to SCSI bus and drive.
Pin 3
J01
Pin 1
Pin 2
ST15150ND
Term. power to SCSI bus. (All other
J01 jumper positions are invalid for
ST15150ND drives.)
Figure 12. Setting terminator power jumpers
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Barracuda 4 Installation Guide, Rev. E
Synchronizing spindles
Use pins 1 and 2 on the J4 connector to attach the
spindle sync cable. See Figure 13.
SCSI
Connector
DC Power
Connector
Pin 1
Pin 2
SSC
J4
Spindle Sync Cable Connector
(SSC). These pins are used to
connect a spindle sync cable.
J4
Spindle sync reference index signal
(REFSIG+).
Ground (GND).
Figure 13. Spindle sync connectors
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Barracuda 4 Installation Guide, Rev. E
39
Other applicable jumper options
Several other jumper options are available as illustrated.
SCSI
Connector
DC Power
Connector
Pin 1
MTR
RES
WP RES
PAR DMS LED
J4
J4
Reserved (RES)
Reserved for future use.
Parity Check option (PAR)
Enable parity check of SCSI bus data (default).
Disable parity check.
Motor Start option (MTR)
Enable motor start. The drive waits for the Start Unit command
from the host before starting the spindle motor.
Disable motor start (default). The drive starts according to the
Delay Motor Start option setting as described below.
Delay Motor Start option (DMS)
(valid only if the Motor Start jumper is not connected)
Motor start delay equal to the SCSI ID multiplied by 10 seconds.
For example, if the SCSI ID=2, the drive starts in 20 seconds.
Disable the delay motor start option (default).
Write Protect option (WP)
Write Protect = On (disables writing).
Write Protect = Off (enables writing – default).
Remote LED Connector*
Pin 5 (top pin) is negative (cathode), Pin 6 (bottom pin)
is positive (anode).
*Note to subsystem designers: In Europe, a red LED indicates an error or warning condition.
For this reason, you may want to use a color other than red with this connection.
Figure 14. Additional jumper options
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40
Barracuda 4 Installation Guide, Rev. E
Setting the SCSI ID jumpers
Use the J5 connector to set the SCSI ID (Figure 15). To
change the SCSI ID, install jumpers on the appropriate
pins as shown in the illustration.
SCSI I/O
Connector
DC Power
Connector
Pin 1
Pin 1
J5
4P
3P 2P
1P
ID3 ID1
ID2 ID0
J5
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 15. Setting the SCSI ID
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Barracuda 4 Installation Guide, Rev. E
41
Terminating the drive
To terminate the ST15150W drive, enable the perma-
nently mounted IC active terminators by installing an
EnableDriveTerminatorjumperonJ4pins11and12as
shown in Figure 16. If you install one of these models
and it is not on the end of the SCSI bus, remove the
jumpertodisablethepermanentlymountedICtermina-
tors and thereby remove internal termination from the
drive.
The ST15150WD drive does not have internal termina-
torsoranywayofaddinginternaltermination. Youmust
provideexternalactivetermination(ANSISCSI-2Alter-
native 2) to the drive when termination is required.
Pin 1
J01
J4
Pin 1
J4
Enable drive terminator.
Disable drive terminator.
Figure 16. Terminating the drive.
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42
Barracuda 4 Installation Guide, Rev. E
Terminator power
Therearefourpossibleterminatorpowerconfigurations
for the ST15150W drive (see Figure 17). You will not
normally need to change this option and can leave the
drive configured as it was shipped from the factory.
The ST15150WD drive should be configured with a
jumper connecting J01 pins 1 and 3 (and no jumper on
J01 pins 2 and 4) as illustrated in Figure 17.
Power
Connector
J01
J4
Pin 1
Pin 3
J01
Pin 1
Pin 2
ST15150W/WD
*
*
Term. power from drive.
Term. power from SCSI bus.
Term. power to SCSI bus.
*
Term. power to SCSI bus and drive.
* Valid for single-ended drives only.
Figure 17. Setting terminator power jumpers
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Barracuda 4 Installation Guide, Rev. E
43
Synchronizing spindles
Use pins 11 and 12 on the J5 connector to attach the
spindle sync cable. See Figure 18.
SCSI I/O
Connector
DC Power
Connector
Pin 1
J5
SSC
Spindle Sync Cable Connector (SSC)
These pins are used to connect a
spindle sync cable.
J5
Spindle sync reference index signal
(REFSIG+).
Ground (GND).
Figure 18. Spindle sync connectors
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44
Barracuda 4 Installation Guide, Rev. E
Other applicable jumper options
Other option jumpers are available as illustrated in
Figures 19 and 20.
Pin 1
J01
Power
Connector
J4
RES RES
WP
J4
Write Protect option (WP)
Write Protect = On (disables writing).
Write Protect = Off
(enables writing – default).
Reserved (RES)
Reserved for future use.
Pin 1
J5
J5
Remote LED Connector*
Pin 9 (top pin) is negative (cathode),
Pin 10 (bottom pin) is positive (anode).
*Note to subsystem designers: In Europe, a red LED
indicates an error or warning condition. For this reason,
you may want to use a color other than red with this
connection.
Figure 19. Additional jumper options
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Barracuda 4 Installation Guide, Rev. E
45
Pin 1
J01
J4
MTR
PAR DMS
J4
Parity Check option (PAR)
Enable parity check of SCSI bus data
(default).
Disable parity check.
Motor Start option (MTR)
Enable motor start. The drive waits for
the Start Unit command from the host
before starting the spindle motor.
Disable motor start (default). The drive
starts according to the Delay Motor
Start option setting as described below.
Delay Motor Start option (DMS)
(valid only if the Motor Start
jumper is not connected)
Motor start delay equal to the SCSI ID
multiplied by 10 seconds plus 3 seconds.
For example, if the SCSI ID = 2, the drive
starts in 23 seconds ((2x10)+3 = 23).
Disable the delay motor start option
(default).
Figure 20. Additional jumper options
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46
Barracuda 4 Installation Guide, Rev. E
Setting the SCSI ID jumpers
The SCSI ID for WC and DC drives is normally set over
the SCSI bus by the host system using connector
contacts 39 (ID0), 40 (ID2), 79 (ID1), and 80 (ID3).
Systems designers may, optionally, install a remote
operator panel connection to set the SCSI ID. Figure 21
illustrates the SCSI ID pins used for this purpose.
Terminating the drive
ST15150WC and ST15150DC drives do not have inter-
nal terminators or any other way of adding internal
terminationtothedrive. Youmustprovidesingle-ended
external active termination (ANSI SCSI-2 Alternative 2)
to these drives when termination is required.
Synchronizing spindles
Spindle synchronization for WC and DC drives is nor-
mallyhandledontheSCSIbusbythehostsystemusing
connector contact 37 for the spindle sync reference
signal.Systemdesignersmay,optionally,installaspindle
sync cable using pin 6 on the J4 connector to provide
+SSREF (see Figure 21).
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Barracuda 4 Installation Guide, Rev. E
47
Connecting remote LEDs
Remote LED connections are provided on the J4 con-
nector (see Figure 21). You can connect 2-pin remote
LEDsusingtheseconnections. Attachthe(-)leadtothe
appropriate pin and then attach the (+) lead to the pin
labelled +5V.
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Barracuda 4 Installation Guide, Rev. E
Pin 1
Pin 1
J4
J4
SCSI ID0
Fault LED pin (–)
SCSI ID1
Vendor Unique
SCSI ID2
Spindle Sync
SCSI ID3
Drive Activity LED (–)
NC
+5V
Ground
Write Protect
Parity Enable
Reserved
Figure 21. Jumper options
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Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, CA 95066-4544, USA
Publication Number: 83328870, Rev. E, Printed in USA
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