Seagate 18FC User Manual

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Barracuda 18FC

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Fibre Channel

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Disc Drive

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ST118273FC

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Installation Guide

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Contents

Preface ........................................................................................ 1

Electrostatic discharge protection ............................................... 1

Important safety information and precautions................. ........... .2

Wichti g e Si c h er h e its h in w ei se .................. ... ................... ... .. ......... 4

Seagate Technology support services......................................... 8

General description ................................................................... 14

Installing the Barracuda 18FC driv e..................................... .....16

Kühlung des Systems................................................................ 17

Troubleshooting......................................................................... 27

©1997, 1998 Seagate Technology, Inc. All rights reserved
Publication Number: 77767525, Rev. A
June 19 9 8

Seagate, Seagate Technology, and the Seagate logo are regis­tered trademarks of Seagate Technology, Inc. Barracuda,
SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either trade­marks or registered trademarks of Seagate Technology, Inc. or
one of its subsidiaries. All other trademarks or registered trade­marks are the property of their respective ow ners.

No part of this publication may be reproduced in any form without

written permission from Seagate Technology, Inc.

Barracuda 18FC Ins tal lation Guide, Re v. A 1

Preface

This manual contains information for users of Seagate Barra-

cuda 18FC (Fibre Channel interface) disc drives. It provides

technical s upport in formation, performance specifi cations, instal-

lation instructions, and a troubleshooting section. Additional

information is available in the Barracuda 18FC Product Manual

(part number 77767524). Contact your Seagate sales represen-

tative if you need to order this publication.

Electrostatic discharge protection

Caution.

All drive electronic assemblies are sensitive to static electricity,

due to the electrostatically sensitive devices used within the

drive cir cui try. Although some devices such as metal-oxide semi-

conductors are extremely sensitive, all semiconductors, as well

as some resi stors and capacitors, may be damaged or deg raded

by exposure to static electricity.

Electrost atic damage t o electr onic de vices may be caus ed 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 expos ed. 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

Removal of circuit boards by personnel not perform­ing depot repair will damage components and may
void the war ranty.

2 Barracuda 18FC Instal lat ion Guide, Re v. A

grounded to avoid potentially damaging static discharges.

• Do not remov e 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
static electricity from the carrier or tray prior to inserting it into
the system.

Important safety information and precautions

Caution.

Use proper safety techniques for safe, reliable operation of this
unit.

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 cautions point out condit ions or practices that m ay dam­age the unit, poss ibly making it unsafe for use.

Always observe the foll owing warnings and pre cautions:

• Follow all cautions and warnings in the procedures.

• Use sound safety practices when operating, installing, or
removing the uni t.

• Use caution when troubleshooting a unit that has voltages
present. Turn off power to the unit before removing i t.

• 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 tem­peratures ar e usually highest.

Use forced-air ventilation when bench-testing the
drive to ensur e proper cooling of drive com ponents.

Barracuda 18FC Ins tal lation Guide, Re v. A 3

• 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
warran ty.

• Do not remove the head and disc assembly (HDA) from the
drive. 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 components and void the war­ranty.

As a component, the drive is designed to be installed and oper­ated in accordance with UL1950, EN60950, CAN\CSA C22.2
950-95, VDE0805 and IEC950.

Seagate takes all reasonable steps to ensure that its products
are certifiable to currently accepted standards. Typical applica­tions of these disc drives include customer packaging and sub­system 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 obtai ning 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 provi sion
for overcurrent protection on drive SELV supply voltages.

4 Barracuda 18FC Instal lat ion Guide, Re v. A
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.

Fremdbelüftung vorzusehen, um eine ausreichende Kühlung der
Laufwerkkomponenten sicher zustellen.

Verwenden Sie geeignete Sicherheits- um den sicheren, zuver­lässigen Betrieb dieser Einheit zu gewährleisten.

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 gewä hlte Verfa hren weder Ihre
persönliche Sicherheit noch die Leistung der Einheit gefährdet.

Beim Testen des Laufwerks auf dem Prüftisch ist

Barracuda 18FC Ins tal lation Guide, Re v. A 5
Beachten Sie in jedem Fall die folgenden Warn-und Vorsicht-

shinweise:

• Beachten Sie alle Warn- und Vorsichtshinweise in diesem
Handbuch.

• Treffen Sie beim Betrieb, bei der Installation oder bei der
Entfernung der Einheit angemessene Sicherheitsvorkehrun­gen.

• Wenn eine Einheit unter Spannung steht, gehen Sie bei der
Fehlerdiagnose besonders vorsichtig vor. Schalten Sie die
Einheit au s, bevor Sie m it den Installations-und Entfernungsar­beiten beginne n.

• 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
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 Laufwerk. Wenn eine
Platine defekt ist, muß das gesamte Laufwerk zur Reparatur
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 führ en.

• Die vormontierte Kopf- und Festplatteneinheit (HDA) nicht aus
dem Laufwerk ne hme n! Falls die HDA beschädigt ist, s chicken
Sie das gesamte Laufwerk zur Reparatur ein.

6 Barracuda 18FC Instal lat ion Guide, Re v. A

• 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 diese s Laufwer k für die Ins tallation und
den Betrieb in Ü bereinstimmung mit UL 1950 , EN60950,
CAN\CSA C22.2 950-95 und VDE0805 vorgesehen.

Seagate ist ständig bemüht, die Zulassungsfähigkeit von
Seagate-P rodukten im Rahme n der gegenw är tig geltend en
Standa rds z u gewäh r leist en. Zu den ty pisch en An wend unge n
dieser Festplattenwerke zählen Systemeinbau durch den
Kunden und die K on strukti on von Unter systemen. Sicherh eitsbe ­hörden gewähren eine bedingte Zulassung für Komponenten wie
das Barracuda-Fest plattenlaufwerk vorbehalt li ch der endgültigen
Zulasssun g im E ndprod ukt. De signer von Unters ysteme n sind
dafür verantwortlich, die Voraussetzungen für die Einhaltung
sicherheits- oder aufsichtsbehördlicher Vorschriften in ihren
Endprodukten und - falls gesetzlich vorgeschrieben - für die
Zulass ung zu sc ha ffen. Eine Gr un dvorau sset zu ng zu r Ei nha l­tung 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 ähn li cher nationaler Behörden
für eigenst ändige Geräte. Technische Testergebnisse zu elektro­magnetische Str ahlung si nd für Design er von Unte rsyst emen auf
Anfrage von der Seagate-Sicherheitsabteilung erhältlich.

Barracuda 18FC Ins tal lation Guide, Re v. A 7

European Union Compliance

If this model has the CE Marking, it complies with the European
Union requirements of the Electromagnetic Compatibility Direc­tive 89/336/EEC of 03 M ay 1989 as amended by Dir ective 92 /31/
EEC of 28 April 1992 and Directive 93/68/EEC of 22 July 1993.

Australian C-Ti ck

If this model has the C-Tick Marking, it complies with the Austra­lia/New Zealand Standard AS/NZS3548 1995 and meets the
Electromagnetic Compatibility (EMC) Framework requirements
of Australia’s Spectrum Management Agency (SMA).

Seagate uses an independent laboratory to confirm compliance
to the above directives. The drive was tested in a representative
system for typical applications. The selected system represents
the most popular characteristics for test platforms. The system
configurations include:

• 486, P entium, and P owerPC Microprocessors

• 3.5-inch Floppy Disc Drive

• Keyboard

• Monitor/Display

• Mouse

• Printer

Although the test system with this Seagate model complies to
the directives, we cannot guarantee that all systems will comply.
The computer manufacturer or system integrator shall confirm
EMC compliance and provide CE Marking for their product.

8 Barracuda 18FC Instal lat ion Guide, Re v. A

Seagate Technology support services

Presales support

To determine which Seagate products are best suited for your
specific application, contact us about configuration and compati­bility and for current product availability. You can leave a voice
message after business hours or send an e-mail message—we
reply during b u siness hours.

Disc Drives 1-877-271-3285 or 405-936-1210

A.M

Fax: [phone]

central time, M-F); e-mail: [e-mail]

(8:00

.

to 12:15 P.M., 1:30 P.M. to 6:00

Tape Product s 1-800-626-6637 or 714-641-2500

A.M

Fax: [phone]

e-mail: [e-mail]

Note.

You can purchase select tape products and tape acces­sories through Seagate Express 24 hours daily by calling
1-800-531-0968 or by faxing your order to 972-481-4812.

(6:00

.

to 5:00

P.M

.,

pacific time, M-F);

T e c hnical 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 ne ed additional assistance with you r Seagate
Seagate products, use one of the Seagate technical support ser­vices list ed below.

SeaFONE® 1-800-SEAG ATE

Seagate’s 800 number (1-800-732-4283) allows toll-free access
to automated self-help services, providing answers to commonly

®

drive or other

P.M

.

,

Barracuda 18FC Ins tal lation Guide, Re v. A 9
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 405-936-1234.

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 Inte rne t fro m Se aga te’s World Wi de We b hom e pa ge
(http://www.seagate.com) or Seagate’s ftp server (ftp://
ftp.seagate.com). You can also send e-mail with your questions
to [e-mail] or [e-mail].

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 st op bit (8-N-1).

Location Phone number

Australia 61-2-9756-2359
France 33 1-48 25 35 95
Germany 49-89-1409331
Taiwan 886-2-2719-6075
Thailand 662-531-8111

10 Barracuda 18FC Installation Guide, Rev. A

Location Phone number

UK 44-1628-478011
USA Disc: 405-936-1600; Tape: 405-936-1630

FAX services

SeaFAX®

You can use a touch-tone telephone to access Seagate’s auto­mated FAX system to receive technical support information by
return FAX. This service is available 24 hours daily.

Location Phone number

Australia 61-2-9756-5170
Germany 49-89-14305102
UK 44-1628-894084
USA 1-800-SEAGATE or

Disc: 405-936-1620; Tape: 405-936-1640

Technical support FAX

You can FAX questions or comments to technical support spe­cialists 24 hours daily. Responses are sent during business
hours.

Location Phone number

Australia 61-2-9725-4052
France 33 1-46 04 42 50
Germany 49-89-14305100
Hong Kong 852-2368 7173
Japan 81-3-5462-2979
Korea 82-2-556-4251/7395
Singapore 65-488-7528
Taiwan 886-2-2715-2923

Barracuda 18FC Ins tal lation Guide, Re v. A 11

Location Phone number

UK 44-1628-890660
USA Disc: 405-936-1685; Tape: 405-936-1683

Direct-support services

Technical support

For one-on-one help, you can talk to a technical support special­ist during local business hours. Before calling, note your system
configuration and drive model number (ST

Location Phone number

Australia 61-2-9725-3366 (9:00

time, M–F)

France 33 1-41 86 10 86 (9:30

2:00

P.M

.

to 5:00

P.M

Germany 49-89-1409332 (9:30

2:00

P.M

.

to 4:00

P.M

Hong Kong 852-2368 9918 (9:00

2:00

P.M

.

to 5:30

P.M

Kore a 82-2-531-5800 (9:00

P.M

1:00

.

to 6:00

Singapore 65-488-7584 (9:00

to 5:00

P.M

.

, M–F)

P.M

A.M

Taiwan 886-2-2514-2237
UK 44-1628-894083 (10: 00

2:00

P.M

.

to 5:00

P.M

USA Please dial 1-800-SEAGATE or 405-936-1234

for the speci fi c product telephone number.
(8:00

A.M

.

to 12:15

P.M

centra l time, M–F)

A.M

A.M

.

, M–F)

A.M

.

.

, M–F)

A.M

.

.

, M–F)

A.M

.

to 12:00

.

, M–F)

.

to 12:00

A.M

.

, M–F)

.

, 1:30

xxxx

).

.

to 5:00

.

to 12:30

to 12:30

to 12:00

P.M

.

to 1:00

P.M

P.M

.

, eastern

P.M

P.M

.

P.M

.

P.M

.

,

.

, 2:00

P.M

.

to 6:00

.

,

,

,

P.M

.

.

,

P.M

.

,

12 Barracuda 18FC Installation Guide, Rev. A

SeaTDD™ 405-936-1687

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 8:00
12:15

P.M

. and 1:30 P.M. to 6:00

P.M

.

(central time) Monday

.

to

through Friday.

Customer service centers

Seagate direct OEM, Distribution, and Systems Integrator cus­tomers should contact their Seagate service representative for
warranty information. Other customers shoul d contact t heir 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 Aus tr alia 65-485-3595 65-488-7503
Middle East and Africa 31-2031-67222 31-2065-34320
Europe 31-2031-67222 31-2065-34320

European toll -free phone nu mbers are availa ble for you to con tact
customer service representatives between 8:30
(European central time) Monday through Friday. The European call
center is located in Amsterdam, The Netherlands.

Location Toll-free phone number

Austria 0 800-20 12 90
Belgium 0 800-74 876
Denmark 80 88 12 66
France 0 800-90 90 52
Germany 0 800-182 6831
Ireland 1 800-55 21 22
Italy 1 677 90 695
Netherlands 0 800-732 4283

. and 5:00 P.M.

A.M

Barracuda 18FC Ins tal lation Guide, Re v. A 13

Location Toll-free phone number

Norway 800-113 91
Poland 00 800-311 12 38
Spain 900-98 31 24
Sweden 0 207 90 073
Switzerland 0 800-83 84 11
Turkey 00 800-31 92 91 40
United Kingdom 0 800-783 5177

Location Phone number FAX number

Japan 81-3-5462-2904 81-3-5462-2979
USA 1-800-468-3472 405-949-6740

Other Americas (Braz il ,

Canada, Mexico) 405-949-6706 405-949-6738

Manufacturer’s represe ntatives

Brazil

MA Informatica 55-21-516-6649 55-21-516-5280

Canada

Memofix
Adtech

905-660-4936
905-812-8099

905-660-4951
905-812-7807

1-800-624-9857

Mexico

Abicom Seamax

SA DE CV 525-546-4888 525-546-4888

Southern Europe

Caesar Italia 39-688-18149 39-688-02103

14 Barracuda 18FC Installation Guide, Rev. A

General description

Barracuda 18FC disc drives are hi gh-speed, r andom -access dig ­ital-data storage devices designed to be used within a Fibre
Channel host system.

The drive is a component for installation in an enclosure
designed for the drive. The disc drive must receive adequate
cooling (refer to “Providing adequate cooling”) and it must be
sufficiently grounded and shielded from emissions. The Barra­cuda 18FC Product Manual (part number 77767524) contains
guidelines for a properly designed enclosure.

Figure 1: Barracuda 18FC disc drive

Barracuda 18FC Ins tal lation Guide, Re v. A 15

Characteristics

ST118273FC

Interface Fibre Channel
Capacity

Unformatted ( Gbytes)
Formatted (Gbytes)

1

23.14

18.21

Recording

Cylinders (user )
Read/write data heads
Avg bytes/t ra ck

7,501
20
155,000

Access time

Average r ead (msec)
Average write (msec)

7.9

8.7

Disc rotation

RPM
Average latency (msec)

7,200

4.17

Data trans fer rate

Maxi mu m instantaneous

106

(Mbytes/sec, per port)

1. The specified formatted capacities are calculated with the standard OEM
sector size (512 bytes per logical block) and sparing.

ST118273FC

1

DC power requirements(±5%)

Maximum start current

Maximum operating current
Average idle current

1. For more detailed power information, refer to the Barracuda
18FC Product Manual, publication number 77767524.

+5 V +12 V

1.70A

3.1A

1.70A

1.30A

1.50A

0.80A

16 Barracuda 18FC Installation Guide, Rev. A

Installing the Barracuda 18FC drive

To install a Barracuda 18FC drive, simply plug the drive directly
into your system’s Fibre Channel backpanel 40-pin single con­nector attachment (FC-SCA). There are no jumpers or termina­tors on the drive, and power is supplied through the connector.
Table 1 on page 25 lists the pin descriptions of the 40-pin FC­SCA.

Read the following general information topics to ensure your
drive is installed properly:

• Providing adequate cooling

• Mounting the drive

• Formatting t he drive

Providing adequate cooling

The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperature is 50
rated MTBF). Refer to Figure 2 on page 18 for an illustration
showing suggested air flow patterns.

The drive’s product manual (77767524) describes how to evalu­ate the air-flow design. The evaluation consists of ensuring that
the case temperatures of certain critical components remain
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 source s.

o

C (30oC for the

Barracuda 18FC Ins tal lation Guide, Re v. A 17
Figure 2 shows one design approach with one or m ore fan s used

to generate air flow. The air-flow pattern can be created by the
fans either pushing or drawing air. The overall flow pattern must
be directed from side to side in most FC-SCA systems.

Kühl ung des Sy stems

Die Gehäusekonstruktion muß eine ausreichende Kühlung des
Laufwerkes gewährleisten. Die Umg ebungstemperatur darf m ax-

o

imal 50
Die Produkthandbuch Barracuda 18FC (Dokument 77767524)

enthalten Anweisungen zur Beurteilung der Luftstromkonstruk­tion. Die Beurteilung muß sicherstellen, daß sich die Gehäuse­temperatur bestimmter kritischer Komponenten bei
Laufwerkbetrieb innerhalb zugelassener Grenzen hält.Wir
empfehlen, das Laufwerk so zu orientieren oder den Luftstrom
so zu lenken, daß der geringste Luftstromwiderstand vonvorne
nach hinten oder von hinten nach vorne verlaufen.

C betragen (30oC für der MTBF).

18 Barracuda 18FC Installation Guide, Rev. A

Above unit

Note. Air flows in the direction shown (back to front)
or in reverse direction (front to back)

Note. Air flows in the direction shown or
in reverse direction (side to side)

Figure 2: Suggested air flow
Abbildung 2. Empfohl ener Luftstromverlauf

Under unit

Above unit

Under unit

Barracuda 18FC Ins tal lation Guide, Re v. A 19

Mounting the drive

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.

You may mount the drive in any orientation (horizontally, verti­cally, or any combination thereof ); however, you must ensure that
the drive rec eives adequate air flow for cooling.

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 mount ing holes in the bottom of the driv e. See
Figure 3.

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.

Installation des Laufwerkes

Beachten Sie bei m Han dhaben 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, ver­tikal oder schräg) installiert werden; jedoch muß dafür gesorgt
werden, daß ein ausreichender Luftstrom zur Kühlung des Lauf­werkes vorhanden ist.

Befestigen Sie das Laufwerk mit vier 6-32-UNC-Schrauben am
Gehäuse des Host-Systems. Die beiden Seiten des Laufwerkes
sind mit jeweils zwei Befestigungslöcher versehen, die

20 Barracuda 18FC Installation Guide, Rev. A
Unterseite des Laufwerkes weist vier weitere Befe stigungslöcher

auf. Siehe Abbiludung 3.
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.

Barracuda 18FC Ins tal lation Guide, Re v. A 21

A

[1]

F

D

Motherboard Ref.

P

R[3]

Common centerline

(X axis) direction

E

B

H

1.875±.0051.875±.005

(.809)

[4]

in the horizontal

of the drive

Pin 1

Notes:

Mounting holes three on each side,

[1]

6-32 UNC. Max screw length into
side of drive is 0.15 in. (3.81 mm).

Mounting holes four on bottom,

[2]

6-32 UNC. Max screw length into
bottom of drive is 0.15 in. (3.81 mm).

Keep-out zone for any components

[3]

J

on backplane.
Connector is centered on module

[4]

and flush with end of base.

K

[2]

Low
Profile

Half
Height

A
B
C
D
E
F

N

H

.136

J
K
L

M
N

P
R

Figure 3: Dimensions
Abbildung 3: Laufwerk abm essungen

M

C

L

Inches Millimeters

5.75

4.00

1.026
.620

4.000
.250

3.750

2.380

1.750

0.181

1.622

1.620

.1215
.1215

±
±

max
ref

±

+
–

±
±
±

+
–
+
–

±

max
max

0.025

0.015

0.010

0.011

0.005

0.010

0.010

0.010

0.013

0.007

0.027

0.021

0.025

146.05

101.6

26.060

15.748

101.600

95.25

60.45

44.450

41.20

41.150

6.350

4.590

3.080

3.080

± .64
± .381

max
ref
± .25
+ .28
– .12

± .25
± .25
± .50

+ .33
– .18
+ .69
– .53
± .64
max
max

22 Barracuda 18FC Installation Guide, Rev. A

Inserting the drive

Most systems provide a way to insert the drive using a carrier or
tray which allows the drive to be hot-plugged into the system’s
Fibre Channel 40-pin single connector attachment (FC-SCA).
Refer to your system documentation about the method they pro­vide and follow their instructions.

When installing the drive on a carrier or tray, discharge the static
electricity from the carrier or tray prior to inserting it into the sys­tem.

Formatting the drive

Warning.

Note.

1. Supply DC pow er to the drive (po w er is supplied to the drive
through the 40-pin FC- S CA).

2. Format the disc drive. This drive is designed to operate with
a variety of operating systems. Refer to your system and
Fibre Channel controller manual for information about
selecting and formatting the drive.

Formatting a drive erases all user data. Be s ure that
you understand this principle before formatting any
hard disc drive (it is not necessary to format a drive
which has previously been used to store data
unless you int end to erase all user dat a).

Seagate is not responsible for lost user data.

Barracuda 18FC Ins tal lation Guide, Re v. A 23

Enabling write cache

Write caching is a feature that allows the drive to transfer write
data to its own cache, tell the controller that the task is complete,
and then actually complete the write at a later time. This
improves write performance by freeing the CPU to go on to its
next command.

Warning.

OEM drives are shipped with write cache disabled by default to
enhance data integrity. If you want to enable the write cache,
refer to your system’s drive controller and software utility docu­mentation. Seagate pr ovide s an ASPI utility that you can use in a
PC compatible system to enable the write cache. It is available
on Seagate’ s CompuServe f orum and on the Seagate BBS (refe r
to “Seagate Technology support services” on page 8).

Information can be lost if you enable write cache
and there is a system failure (for example, power
failure) before the data has actually been physically
written to the disc.

Connecting remote LEDs

You can connect remote LEDs using J6 (see Figure 4).
Connect the anode (usually the longer LED connector) to the

+5V pin, and the cathode to the appropriate LED output pin. For
example, if you want to attach an LED which indicates drive
activity, connect the LED’s anode connector to J6 pin 11 and the
cathode to J6 pin 12 or connect to J6 pin 8 through an appropri­ate external curr ent-limitin g resi stor.

Note.

The LED is on when the drive is idle and off when the
drive is proc essing commands .

24 Barracuda 18FC Installation Guide, Rev. A

Drive
Front

Pin 1

J6

Reserved

Port A Bypass LED [1]
Port B Bypass LED [1]
Fault LED [1]
Reserved
Active LED [2]
+5V
Active LED [1]
Ground [3]

[1] The drive has a 2.2K ohm re sisto r in serie s with this LED driver .

Tie the minus side o f an exter nal hi gh- effici ency LE D (i.e., 2ma)
to this pin. Connect the plus side of the LED to +5V.

[2] An external cu rrent-l imitin g r esist or is r equi red whe n c onne cti ng

an LED to this pin. Connect the mi nus side of the resisto r/LED
combination to this pin. Connect the plus side to +5V. This pin is
connected in parallel wi th the s ignal of the s ame na me in the in­terface connector (J1).

[3] Jumper storage location (across pins 2 and 4).

Figure 4: LED indicator connector (J6)

Barracuda 18FC Ins tal lation Guide, Re v. A 25

Table 1: FC-SCA pin descriptions

Pin/contact Signal name Signal type

1* –EN bypass port A TTL output
2* 12 Volts
3* 12 Volts
4* 12 Volts
5* –Parallel ESI
6* Ground
7* Active LED out Open collector out
8* Reserved
9* Start_1 TTL input
10* Start_2 TTL input
11* –EN bypass port B TTL output
12* SEL_6 TTL input/output
13* SEL_5 TTL input/output
14* SEL_4 TTL input/output
15* SEL_3 TTL input/output
16* F ault LED out Open collector out
17* Reserved NC
18* Reserved NC
19* 5 Volts
20* 5 Volts
21 12 Volts charge
22 Ground
23 Ground
24* +Port A_in Diff. PECL input pair
25* –Port A_in

[1]

26 Barracuda 18FC Installation Guide, Rev. A

Pin/contact Signal name Signal type

26 Ground
27* +Port B_in Diff. PECL input pair
28* –Port B_in
29 Ground
30* +Port A_out Diff. PECL output pair
31* –Port A_out
32 Ground
33* +Port B_out Diff. PECL output pair
34* –Port B_out
35 Ground
36 SEL_2 TTL input/output
37 SEL_1 TTL input/output
38 SEL_0 TTL input/output
39 Reserved NC
40 5 Volts charge

*Short pins in mating backpanel connector.
[1] This pin may be connected to external logic to detect the presence of the drive.

The drive connects this pin to the common ground.

Barracuda 18FC Ins tal lation Guide, Re v. A 27

T roubleshooting

Before calling Seagate Technical Support, please read the pos­sibilities discussed below. The suggestions presented here will
resolve the majority of instal lat ion problems .

General installation troubleshooting

Check system compatibility.

•

device. Check your system documentation to ensure that it
supports FC devices.

Check the physical attachment.

•

properly mated with the backpanel Fibre Channel single con­nector attachment (FC-SCA).

Check to ensure that drive is receiving power.

•

drive into your system. Listen carefully for the sound of the
drive motor spinning up. If the drive motor does not spin up,
check the power supply. If your power supply is functioning
properly, but the drive does not spin up, contact the company
from which you pur chased the drive .

Check your system or backpanel documentation to

•

ensure you have set options in accordance with the man­ufacturer’s recommendations.

addresses, are set at the backpanel within the host system or
through system soft wa re. Chec k y our host syst em documenta ­tion about how to set th ese options in your particular system.

This is a Fibre Channel (FC)

Ensure that the drive is

Inser t the

All device options, including

Seagate Technology, Inc.
920 Disc Drive, Scotts Valle y, CA 95066-4544, USA

Publicat ion Number: 77767525, Rev. A, Printed in USA