Seagate Barracuda 9FC Installation Manual

••••••••••••••••••••••

Barracuda 9FC

••••••••••••••••••••••

Fibre Cha nnel

••••••••••••••••••••••

Disc Drive

••••••••••••••••••••••

ST19171FC

••••••••••••••••••••••

Installation Guide

••••••••••••••••••••••

Contents

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

Electro static discharge protection ............................................ ... 1

Imp ortant safety informatio n and pre cautions............................. 2

Wichtige Sicherheitshinweise...................................................... 4

Technical support services................ ...................... .................... 8

General description................................................................... 10

Installing the ST19171FC drive................................................. 12

Kühlung des Systems................................................................ 13

Troubleshooting.........................................................................23

©1996 Seagate Technology, Inc. All rights reserved
Publicatio n Number: 83329090, Rev. A
July 1996

Seagate

®

, Seagate Technology®, and the Seagate logo are reg­istered trademarks of Seagate Technology, Inc. Barracuda™,
SeaFAX™, SeaFONE™, SeaTDD™, and SeaBOARD™ are
trademarks of Seagate Technology, Inc. Other product names
are registered trademarks or trademarks of their owners.

No part of this publication may be reproduced in any form without
written permission from Seagate Technology, Inc.

Barracuda 9FC Installation Guide, Rev. A 1

Preface

This manual contains information for users of the Seagate
ST19171FC (Fibre Channel interface) Barracuda disc drives. It
provides technical support information, performance specifica­tions, installation instructions, and a troubleshooting section.
Additional information is available in the Barra cuda 9FC Product
Manual (part number 83329100). Contact your Seagate sales
repre sentative if yo u need to order this publication.

Electros tatic disch arge p rotecti on

Caution. Removal of circuit boards by personnel not perform-

ing depot repair will damage components and may
void the warranty.

All drive electronic assemblies are sensitive to
static electricity, due to the electrostatically sensi­tive devices used within the drive circuitry.
Although some devices such as metal-oxide semi-

conductors are extremely sensitive, all semicon­ductors, as well as some resistors and capacitors, may be
damaged or degraded by exposure to static electricity.

Electrostatic damage to electronic devices may be caused by
the direct discharge of a charged conductor or by exposure to
the static fields surrounding charged objects. To avoid damaging
drive electronic assemblies, observe the following precautions
when installing or servicing the drive:

• Ground yourself to the drive whenever the drive
electroni cs are or will be exposed. Connect your­self to ground with a wrist strap (Seagate part
number 12263496). Connection may be made to

2 Barracuda 9FC Installation Guide, Rev. A

any grounded metal assembly. As a general rule, remember
that you and the drive electronics must all be grounded to
avoid potentially damaging static discharges.

• Do not remove any circuit boards from the drive.

• Never use an ohmmeter on any cir cui t boards.

• When installing the drive on a carrier or tray, discharge the

static elect ricity from the c arri er or tray prior to inserting it into
the system.

Impo rtant safety inform ati on and precau tion s

Caution. Use forced-air ventilation when bench-testing the

drive to ensure pr oper cooling of drive components.

Use proper safety and repair techniques for safe, reliable opera­tion of this unit. Service should be done only by qualified per­sons.

This manual and labels on the unit may contain warnings and
cautions that must be carefully re ad and followed t o mini mize or
eliminate the risk of personal injury. The warnings point out con­ditions or practices that may endanger you or others. The cau­tions 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 wa ys in which
maintenance might be performed or the possible risk of each
technique. Consequently, we have not completed any such
broad evaluation. If you use a non-approved procedure or tool,
first ensure that the method you choose will not risk either your
safety or unit performance.

Barracuda 9FC Installation Guide, Rev. A 3
Always observe the following warnings and pre cautions:

• Perform all maintenance by following the procedures in this

manual.

• Follow all cautions and warnings in the procedures.

• Use sound safety practices when operating or repairing the

unit.

• Use caution when troubleshooting a unit that has voltages

present. Turn off power to the unit before servicing it.

• Ensure that the internal temperature of the rack or cabinet

does not exceed the limits defined for the drive w hen the drive
is mounted in an equipment rack or cabinet. When units are
stacked vertically, pay special attention to the top where tem­peratures are usually highest.

• Follow the precautions listed above in “Electr ostatic discharge

prote ction.”

• 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.

As a component, the drive is designed to be installed and oper­ated in accordance with UL1950, IEC950, CSA C22.2 950-M89,
VDE0805 and EN60950.

Seagate takes all reasonable steps to ensure that its products
are certifiable to currently accepted standards.

Typical applications of these disc drives include customer p ack­aging 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

4 Barracuda 9FC Installation Guide, Rev. A
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 overcurr ent protection on dr ive SELV
supply voltages.

This unit is a component part and as such is not meant to c omply
with FCC or similar national requirement s as a stand-alone unit.
Engineering radiated emissions test results are available
throu gh the Seagate Safety Department to a ssist the subsystem
designer.

Wichtige Sicherheitshinweise
Vorsicht.

Fremdbelüftung vorzusehen, um eine ausreichende Kühlung der
Laufwerkkomponenten sicherzustellen.

Verwenden Sie geeignete Sicherheits- und Reparaturverfahren,
um den sicheren, zuverlässigen Betrieb dieser Einheit zu
gewährleisten. Reparaturen dürf en nur von qualifiziertem Fach­personal vorgenommen 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

Beim Testen des Laufwerks auf dem Prüftisch ist

oder Praktiken aufmerksam, die Sie oder andere gefährden
könnten. Die Vorsichtshinweise machen auf Situationen oder
Praktiken aufmerksam, die die Einheit beschädigen können, so
daß deren Gebrauch mit Risiko be haftet ist.

Barracuda 9FC Installation Guide, Rev. A 5
Die Warn- und Vorsichts hinweise sind nicht allumfa ssend! 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 sich er, daß das gewählte Verfahren weder Ihre
persönliche Sicherheit no ch 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.

• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse

montiert i st, 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 b esonders auf den
oberen Stapelbereich, da dort die Temperatur gewöhnlich am
höchsten ist.

• Befolgen Sie die oben unter “Electrostatic Discharge Protec-

tion” angegebenen Sicherheitsmaßnahmen.

6 Barracuda 9FC Installation Guide, Rev. A

• Nehmen Sie keine Platinen aus dem Laufwerkgehäuse. We nn

eine Platine defekt ist, muß das gesamte Laufwerk zur Rep­aratur eingeschickt werden. Die Herausnahme von Platinen
durch anderePersonen als die für die werkseitige Reparatur
zuständigen kann zu einer Beschädigung der Komponenten
und Erlöschen des Garantieanspruchs führen.

• Die vormontierte Kopf- und Festplatteneinheit (HDA) nicht aus

dem Laufwerkgehäuse nehmen! F alls die HDA beschädigt ist,
schicken Sie das gesamte Laufwerk zur Reparatur ein.

• Die HDA ist nicht vor Ort reparierbar und darf nicht auseinan-

dergenommen werden! Öffnen der versiegelten HDA durch
andere Personen als die für die werkseitige Reparatur zustän­digen hat eine Beschädigung der Komponenten und
Erlöschen des Garantieanspruchs zur Folge.

Als Teilkomponente ist dieses Laufwerk für die Installation und
den Betrieb in Übereinstimmung mit UL 1950, IEC950,
EN60950, CSA C22.2 950 und VDE0805 vorgesehen.

Seagate ist ständig bemüht, die Zulassungsfähigkeit von
Seagate-Produkten im Rahmen der gegenwärtig geltenden
Standards zu gewährleisten. Zu den typischen Anwendungen
dieser Festplattenwerke zählen Systemeinbau durch den
Kunden und die Konstruktion von Untersystemen. Sicherheits­behörden gewähren eine bedingte Zulassung für Komponenten
wie das Barracuda-Festplattenlaufwerk vorbehaltlich der
endgültigen Zulasssung im Endprodukt. Designer von Untersys­temen sind dafür verantwortlich, die Voraussetzungen für die
Einhaltung sicherheits- oder aufsichtsbehördlicher Vorschriften
in ihren Endprodukten un d - falls gesetzlich vorgeschrieben - für
die Zulassung zu schaffen. Eine Grundvoraussetzung zur Ein-

Barracuda 9FC Installation Guide, Rev. A 7
haltung 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 A nfrage von der Seagate-Sicherheitsabteilung erhältlich.

8 Barracuda 9FC Installation Guide, Rev. A

Technical support services

Seagate Technology provides technical support literature and
diagnostic utilities to authorized distributors. Please contact your
dealer for technical support and installation troubleshooting.
Pro duct technical support is available for all Seagate products by
calling the SeaFAX™, SeaFONE™, SeaTDD™, or Sea­BOARD™ services. These are toll calls if you dial from outside
of the number’s local dialing area. Seagate also has a forum on
CompuServe and an internet site.

SeaF AX : USA 1-800-SEAGATE ;
England 44-1-62-847-7080; Australia 61-2-756-5170

Use a touch-tone telephone to access Seagate’s automated
FAX system and select technical support information by return
FAX. This service is available 24 hours a day, 7 days a week.

Com pu Se rve foru m

Online support for Seagate products is available on Com­puServe. This includes an extensive question and a nswer mes­sage base, downloadable utilities, and documentation files in
Adobe

TM

AcrobatTM format which you can download and view
from your own computer. Type “Go Seagate” to access this
service.

Intern et site: www.s eaga te .co m; ftp.seag ate. com

Support services, product information, and much more is pro­vided on this web site.

SeaFONE: 1-800-SEAGATE

Technical support specialists are available from 8:00 A.M. to
5:00
informatio n on selected Seagate products is provided while you

P.M. PST, Monday through Friday. Recorded technical

Barracuda 9FC Installation Guide, Rev. A 9
are on hold. Recordin gs are accessible 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 connected to the phone
line. A TDD device is required to access this service. You can
send questions or comments 24 hours a day. One-on-one
exchanges with a technical support specialist ar e av ailable f rom
8:00

A.M. to 5: 0 0 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 communications software must be set
for eight data bits, no parity, and one stop bit (8N1). These oper­ate at 300 to 9600 baud. With this service you can access:

• Specifications and jumper configurations

• Reprints of documentation

• Utilities th at you can download to your own computer

SeaBOARD lo catio n Modem num ber

USA, Mexico, Latin America........................[phone]

England.......................................................44-1-62-847-8011

Germany......................................................49-89-140-9331

Singapore....................................................65-292-6973

Australia ......................................................61-2-756-2359

Canada........................................................[phone]

France .........................................................(+ 33 1) 48-25-35-9 5

Korea. .................................... ......................82-2- 556-7294

Thailand.......................................................662-531-8111

10 Barracuda 9FC Installation Guide, Rev. A

General description

Barracuda 9FC disc drives are high-speed, random-access digi­tal-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 9FC Product Manual (part number 83329100) contains
guidelines for a properly designed enclosure.

Figure 1. Barracuda 9FC di sc drive

Barracuda 9FC Installation Guide, Rev. A 11

Characteristics ST19171FC

Interface Fibre Channel
Capacity

Unformatt ed 11.7 Gbytes
Formatted 9.1 Gbytes

Recording

Cylinders (user) 5,273
Read/write data heads 20
Avg bytes/track (unformatted) 102,000

Seek time

Average read 8.0 msec
Average write 9.5 msec

Disc rotation

RPM 7,200
Average latency 4.17 msec

Data transfer rate

Maximum instantaneous 106.3 Mbytes/sec.

DC power requirements (±5V)

1

+5V +12V
Maximum start current 1.185A 2.180A
Maximum operating current 1.289A 1.105A
Average idle current 1.203A 0.896A

1. For more detailed power information, refer to the ST19171FC Product
Ma nual, publica tio n number 83 32 9100 .

12 Barracuda 9FC Installation Guide, Rev. A

Installing the ST19171FC drive

To install a ST19 171FC drive, simply plug th e drive directly into
your system’s Fibre Channel backpanel 40-pin single c onnector
attachment (FC-SCA). There are no jumpers or terminators on
the drive, and power is supplied through the connector. Table 1
on page 21 lists the pin descriptions of the 40-pin FC-SCA.

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

• Providing adequate cooling

• Mounting the drive

• Formatting the drive

Pro vid ing ade qu ate coolin g

The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperature is 50
maximum allowable head and disc assembly (HDA) case tem­perature is 60

o

C (140oF).

The drive’s product manual (83329100) describes how to evalu­ate the air -flow design. The evaluation consists of ensurin g that
the temperatures of certain critical components remain within
acceptable limits dur ing 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 aro und the head
and disc assembly (HDA). Also, choose the shortest possible

o

C (122oF). The

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.

Barracuda 9FC Installation Guide, Rev. A 13
Figure 2 sho ws one design approac h with one or more fans used

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

Kühl un g des System s

Die Gehäusekonstruktion muß eine ausreichende Kühlung des
Laufwerkes gewährleisten. Die Umgebungstemperatur darf
maximal 50

Die Produkthandbuch Barracuda 9FC (Dokument 83329100)
enthalten Anweisungen zur Beurteilung der Luftstromkonstruk­tion. Die Beurteilung muß sicherstellen, daß sich die Gehäuse-

o

C betragen.

temperatur 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
erzeugt wird und gleichzeitig ein Luftstrom über den Platinen
und um die Kopf- und Festplatteneinheit (HDA) gegeben ist.
Wählen Sie einen möglichst kurzen Weg zwischen Lufteinlaß
und -auslaß. Dadurch wird die Strecke, die die vom Laufwerk
und anderen nahegelegenen Hitzequellen aufgewärmte Luft
zurücklegt, auf ein Minimum beschränkt.

Abbildung 2 zeigt zwei Konstruktionsmöglichkeiten, bei denen
ein oder mehrere Lüfter den Luftstrom erzeugen. Der Luftstro m­verlauf 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.

14 Barracuda 9FC Installation Guide, Rev. A

Above unit

Under unit

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

Above unit

Under unit

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

Figure 2. Suggested air flow
Abbild ung 2. Empfohlener Luftstromver lauf

Barracuda 9FC Installation Guide, Rev. A 15

Mounting the drive

Do not touch the connector pins or any compo­nents on the control b o ard without observing static­discharge precautions. Always handle the drive by
the frame only.

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 dri ve. 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.

Install atio n des Laufwer kes

Beachten Sie beim Handhaben und Anfassen der Anschlußstifte
und Komponenten die Vorsichtsmaßnahmen zur Verhinderung
statischer A ufladung. Fassen Sie das Laufwerk nur am Rahmen
an.

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
Unterseite des Laufwerkes weist vier weitere Befestigungslöcher
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

16 Barracuda 9FC Installation Guide, Rev. A
Schraube nicht ohne Widerstand einschrauben läßt, sind die

Gewinde nicht korrekt a neinander ausgerichtet.

B

H

1.875±.0051.875±.005

D

J

E

K

[2]

F

[1]

A

Motherboard Ref.

P

[4]

R[3]

Common centerline

in the horizontal

(X axis) direction

of the drive

(.809)

Pin 1

Low
Profile

Half
Height

Figure 3. DImensions
Abbildu ng 3: Laufwerkabmessungen

N

.136

L

C

M

Barracuda 9FC Installation Guide, Rev. A 17

Notes:



Mounting holes three on each side, 6-32 UNC. Max screw

[1]

length into side of drive is 0.15 in. (3.81 mm).







Mounting holes four on bottom, 6-32 UNC. 

[2]

Max screw length into bottom of drive is 0.15 in. (3.81 mm).







Keep-out zone for any components on backplane.

[3]





Connector is centered on module and flush with end of base.

[4]

Inches Millimeters

A
B
C
D
E
F

G
H

J

K

L

M
N

P





5.760

4.010

1.026
.620

4.000
.250

1.750

3.750

2.370

1.750

0.181

1.646

1.625

.1215

max
max
max
ref
±
+



–

±
±
±
±

+



–
max
±
max

0.010

0.010

0.005

0.010

0.010

0.010

0.020

0.018

0.013

0.020








146.304

101.854

26.060

15.748 

101.600

6.350

44.45 

95.250 

60.200 

44.450

4.590

41.800 

41.280

3.080

max
max
max
ref
±
+



–

±
±
±
±

+



–
max
±
max






.25 
.25
.12 
.25
.25 
.25 
.50 
.45
.33


.50

R

.1215

max

3.080

max

18 Barracuda 9FC Installation Guide, Rev. A

Inse rtin g the driv e

Most systems pro vide 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
electricit y from t h e carrier or tr a y prior t o inserting it into the sys­tem.

Formatting the drive

Warning. Formatting a drive erases all user data. Be sure that

you understand this principle before formatting any
hard disc drive (it is not necessary to format a drive
which has previously been used to store data).

1. Supply DC power to the drive (power is supplied to the drive
throu gh the 40-pin FC -SCA).

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.

Enabl ing write cache

Write caching is a feature that allows the drive to tra nsf er 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.

Barracuda 9FC Installation Guide, Rev. A 19
Warning. Information can be lo st 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.

OEM driv es are shipped wi th write cache disabled b y default to
enhance data integrity. If you want to enable the write cache,
refer to your system’s drive controll er and software utility docu­mentation. Seagate provides an ASPI utility that you can use in a
PC compatible system to enable the write cache. It is available
on Seagate’s CompuServe forum and on the Seagate BBS
(refer to “Technical support services” on page 8).

Conn ectin g rem o te LED s

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

+5V pin, and th e cathode to the appropriate LED output pin. For
example, if you w ant to at tach an LED which lights up when the
drive is active (reading or writing), connect the LED’s anode con­nector to J6 pin 8 and the cathode to J6 pin 11.

20 Barracuda 9FC Installation Guide, Rev. A

Pin 2

Pin 1

J6

Pin 2
Pin 1

Port A Bypass LED [1]
Port B Bypass LED [1]
Fault LED [2]

J6

Reserved
Active LED [2]
+5V
Ground [3]
Active LED [1]

[1] The drive has a 2.2K ohm resistor in series with this LED driver.

Connect the minus side of an external high-efficiency LED (i.e.
2ma) to this pin. Connect the plus side of the LED to +5V.

[2] An e xternal cu rren t l im iting resistor is re qu ired whe n con ne ct ing a n

LED t o this pin. T he minus sid e of the resi stor/LED co mbination is
connected to this pin. Connect the plus side to +5V. This pin con­nects in parallel with the signal of the same name in the J1 interface
connector.

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

Figure 4. LED indicator connector (J6)

Barracuda 9FC Installation Guide, Rev. A 21

Table 1: FC-SCA pin descriptions

Pin/contact Signal name Signal type

1* –EN bypas s port A TTL output
2* 12 Vol t s
3* 12 Volts
4* 12 Vol t s
5* Reserved NC
6* Reserved NC
7* Active LED out Open collector out
8* Reserved NC
9* RM T_ start TTL input
10* DLYD_ st art TTL in pu t
11* –EN bypas s por t B TTL output
12* SEL_6 TTL in pu t
13* SEL_5 TTL input
14* SEL_4 TTL in pu t
15* SEL_3 TTL input
16* Fault LED out Open collector out
17* Reserved NC TTL input
18* Reserved NC
19* 5 Volts
20* 5 Volts
21 12 Volts charge
22 Ground
23 Ground
24* +CH1_in Diff. PECL input pa ir
25* –CH1_ in

22 Barracuda 9FC Installation Guide, Rev. A

Pin/contact Signal name Signal type

26 Ground
27* +CH2_ in Diff. PECL input pair
28* –CH2_ in
29 Gro un d
30* +CH1_ out Diff. PECL output pair
31* –CH1_ ou t
32 Ground
33* +CH2_ ou t Diff. PECL output pair
34* –CH2_ out
35 Gro un d
36 SEL_2 TTL in pu t
37 S E L_1 TT L inpu t
38 SEL_0 TTL in pu t
39 Reserved NC
40 5 Volts charge

*Shor t pins in the mating backpane l connecto r.

Barracuda 9FC Installation Guide, Rev. A 23

Troubleshooting

Before calling Seagate Technical Support, please read the pos­sibilities discussed below. The suggestions presented here will
re solve the majority of installation probl ems.

Gener al instal lati on troub les ho otin g

• Check system compatibility. This is a Fibre Channel (FC)

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

• Check the physical attachment. Ensure that the drive is

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

• Check to ensure that drive is receiving power. Insert the

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 purchased the driv e.

• Check your system or backpanel documentation to

ensure you have set options in accordance with the man­ufacturer’s recommendations. All device options, including

addresses, are set at the backpanel within the host system or
through system software. Check your host system documen­tation about how to set these options in your particular system.

Seagate Technology, Inc.
920 Disc Dri ve, Scotts Valley, CA 95066-4544, USA

Publicatio n Number: 83329090, Rev. A, Pr inted in USA