Seagate BARRACUDA 4 Family User manual

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BARRACUDA 4 Family
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ST15150N/ND/DC
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ST15150W/WD/WC
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Installation Guide
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2 Barracuda 4 Installation Guide, Rev. E
Contents
Preface .................................................................. 1
Electrostatic discharge protection ........................ 1
Important safety information and precautions....... 2
WichtigeSicherheitshinweise ............................... 5
Technical support services ..................................... 10
General description ................................................ 13
Initial setup information ........................................... 19
Kühlung des Systems .......................................... 24
Installation des Laufwerkes
und Anschluß der Kabel................................... 27
N/ND drives section................................................ 35
W/WD drives section .............................................. 40
WC/DC drives section ............................................ 46
© 1995 Seagate Technology, Inc. All rights reserved
Publication Number: 83328870, Rev. E
July 1995
Seagate®,SeagateTechnology®,andtheSeagatelogo
are registered trademarks of Seagate Technology, Inc.
Barracuda™, SeaFAX™, SeaFONE™, SeaTDD™,
and SeaBOARD™ are trademarks of Seagate Tech-
nology,Inc.Otherproductnamesareregisteredtrade-
marks or trademarks of their owners.
No part of this publication may be reproduced in any
formwithoutwrittenpermissionfromSeagateTech-
nology, Inc.

Barracuda 4 Installation Guide, Rev. E 1
Preface
ThismanualcontainsinformationforusersofSeagate®
ST15150N/ND/DCand ST15150W/WD/WCBarracuda™4
SCSI disc drives. It provides support services, perfor-
mancespecifications,andinitial setupinformation.Ad-
ditional information is available in the Barracuda 4
ProductManual (partnumber83328880).Contactyour
Seagate sales representative if you need to order this
publication.
Electrostatic discharge protection
Caution. Removalof 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-
tremelysensitive,allsemiconductors,aswellassome
resistors and capacitors, may be damaged or de-
graded by exposure to static electricity.
Electrostatic damage to electronic devices may be
causedbythedirect discharge ofa charged conductor
or by exposure to the static fields surrounding charged
objects. To avoid damaging drive electronic assem-
blies,observethefollowingprecautionswheninstalling
or servicing the drive:

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-
ableoperation of thisunit. Service shouldbe 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.

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-
tionspointoutconditionsorpracticesthatmaydamage
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
usea non-approved procedure ortool, first ensure that
themethodyouchoosewillnotriskeitheryoursafetyor
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.
• Usesound safety practices whenoperating or repair-
ing the unit.
• Use caution when troubleshooting a unit that has
voltages present. Turn off power to the unit before
servicing it.

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
drivewhenthedriveis mountedin anequipment 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
bypersonnelnotperformingdepotrepairwilldamage
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.

Barracuda 4 Installation Guide, Rev. E 5
Seagate takes all reasonable steps to ensure that its
products are certifiable to currently accepted stan-
dards.Typicalapplications ofthese discdrives 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
tocomply withFCC or similarnational requirementsas
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

6 Barracuda 4 Installation Guide, Rev. E
Reparaturverfahren, um den sicheren, zuverlässigen
Betrieb dieser Einheit zu gewährleisten. Reparaturen
dürfen nur von qualifiziertem Fachpersonal
vorgenommenwerden.WirempfehlendieVerfahrenin
diesem Handbuch als effektive Methoden zur
WartungundReparaturderEinheit.EinigeVerfahren
erfordern Spezialwerkzeuge; diese müssen zur
sachgemäßenAusführungderWartungsarbeitenund
aus Sicherheitsgründen den Empfehlungen
entsprechend verwendet werden.
Die Verfahren in diesem Handbuch und die Aufkleber
aufdemGerätenthaltenWarn-undVorsichtshinweise.
Diese Hinweise sind sorgfältig durchzulesen und zu
beachten, um das Risiko von Verletzungen auf ein
Mindestmaßzubeschränken oderganz zuvermeiden.
Die Warnhinweise machen auf Situationen oder
Praktiken aufmerksam, die Sie oder andere gefährden
könnten.DieVorsichtshinweisemachenaufSituationen
oder Praktiken aufmerksam, die Einheit beschädigen
können,sodaßderenGebrauchmitRisikobehaftetist.
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

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
diefürdasLaufwerkvorgegebenenGrenzwertenicht
übersteigt. Wenn Einheiten vertikal übereinander
betestigt werden, achten Sie besonders auf den

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 einePlatinedefekt ist,muß
das gesamte Laufwerk zur Reparatur eingeschickt
werden.DieHerausnahmevonPlatinendurchandere
Personen als die für die werkseitige Reparatur
zuständigen kann zu einer Beschädigung der
KomponentenundErlöschendesGarantieanspruchs
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.

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.

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
installationtroubleshooting.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 [phone]; 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 includesan extensivequestion and
answermessagebase,downloadableutilities,anddocu-
mentationfilesin Adobe™Acrobat™format whichyou
candownload and view fromyourown computer. Type
“Go Seagate” to access this service.

Barracuda 4 Installation Guide, Rev. E 11
SeaFONE: [phone]
Technicalsupportspecialistsareavailable8:00A.M.to
5:00 P.M.PST, Monday through Friday. Recorded tech-
nical information for selected Seagate products is pro-
videdwhileyouareonhold.Recordingsareaccessible
24 hours a day, 7 days a week.
SeaTDD: [phone]
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:
TheSeagateTechnicalSupportBulletinBoardSystem
(BBS) is available 24 hours a day, 7 days a week. A
modemis requiredto access thisservice. Thecommu-
nicationssoftwaremustbe setfor8data bits,noparity,
and 1 stop bit (8N1). All BBS numbers operate at 9600
baud max. With this service you can access:
• SpecificationsandjumperconfigurationsforSeagate
products
• Reprints of Seagate documentation
• A directory of information and helpful utilities that you
can download to your own computer

12 Barracuda 4 Installation Guide, Rev. E
Telephone
Location number
USA, Mexico, Latin America [phone]
England 44-62-847-8011
Germany 49-89-140-9331
Singapore 65-292-6973
Australia 61-2-756-2359
Canada [phone]
France 33-1-40-67-1034
Korea 82-2-556-7294

Barracuda 4 Installation Guide, Rev. E 13
Figure 1. Barracuda 4 disc drive (N/ND)
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
receiveadequatecooling(refer to“Providingadequate
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
DC Power Connector
J4 J01

14 Barracuda 4 Installation Guide, Rev. E
SCSI I/O
Connector
DC Power
Connector
J4 J01
Pin 1
J5
Figure 3. Barracuda 4 disc drive (WC/DC)
Figure 2. Barracuda 4 disc drive (W/WD)
J4
J6

Barracuda 4 Installation Guide, Rev. E 15
Characteristics of ST15150 drives
N/ND W/WD/WC/DC
SCSI-2 Interface1Fast Fast & Wide
Capacity
Unformatted 5,062 Mbytes 5,062 Mbytes
Formatted24,294 Mbytes 4,294 Mbytes
Recording
Cylinders (user accessible) 3,711 3,711
Read/Write heads 21 21
Servo heads 1 1
Avg bytes/track 64,160 64,160
Modulation RLL 1,7 code RLL 1,7 code
Synchronous SCSI rate
Max burst transfer 10 Mbytes/sec 20 Mbytes/sec
Seek time3
Average read 8.0 msec 8.0 msec
Average write 9.0 msec 9.0 msec
Disc rotation
RPM 7,200 7,200
Average latency 4.17 msec 4.17 msec
Multi-segmented cache
Physical 1,024 Kbytes 1,024 Kbytes
Available to user 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.

16 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 10.95 0.95 1.19 0.95
Average idle current
DC X 1, 12 0.63 0.78 0.69 0.78
Max starting current
Peak DC 3σ 3,60.93 2.18 1.02 2.18
Peak AC 3σ3– 3.10 – 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 0.92 0.86 1.13 0.86
Max DC 3σ 10.95 0.95 1.19 0.95
Max (peak) AC 3σ1.08 1.8 1.95 1.8
Track following at
OD DC X 10.91 0.80 0.97 0.80
ID DC X 10.89 0.86 0.96 0.86
Read track
OD DC 3σ 1, 14 0.97 0.89 1.39 0.89
AC 3σ1.05 1.10 1.96 1.10
Seeking
Typical DC X 1, 13 0.91 1.10 0.98 1.10
Max DC 3σ 10.92 1.20 1.07 1.20
Max (peak) AC 3σ1.05 1.87 1.7 1.87

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

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.