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Download from Www.Somanuals.com. All Manuals Search And Download.
Barracuda 18FC Installation Guide, Rev. A
1
Preface
This manual contains information for users of Seagate Barra-
cuda 18FC (Fibre Channel interface) disc drives. It provides
technical support information, performance specifications, 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. Removal of circuit boards by personnel not perform-
ing depot repair will damage components and may
void the warranty.
All drive electronic assemblies are sensitive to static electricity,
due to the electrostatically sensitive devices used within the
drive circuitry. Although some devices such as metal-oxide semi-
conductors are extremely sensitive, all semiconductors, as well
as some resistors and capacitors, may be damaged or degraded
by exposure to static electricity.
Electrostatic damage to electronic devices may be caused by the
direct discharge of a charged conductor or by exposure to the
static fields surrounding charged objects. To avoid damaging
drive electronic assemblies, observe the following precautions
when installing or servicing the drive:
• Ground yourself to the drive whenever the drive electronics
are or will be exposed. Connect yourself to ground with a wrist
strap (Seagate part number 12263496). Connection may be
made to any grounded metal assembly. As a general rule,
remember that you and the drive electronics must all be
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2
Barracuda 18FC Installation Guide, Rev. A
grounded to avoid potentially damaging static discharges.
• Do not remove any circuit boards from the drive.
• Never use an ohmmeter on any circuit boards.
• When installing the drive on a carrier or tray, discharge the
static electricity from the carrier or tray prior to inserting it into
the system.
Important safety information and precautions
Caution.
Use forced-air ventilation when bench-testing the
drive to ensure proper cooling of drive components.
Use proper safety 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 oth-
ers. The cautions point out conditions or practices that may dam-
age the unit, possibly making it unsafe for use.
Always observe the following warnings and precautions:
• Follow all cautions and warnings in the procedures.
• Use sound safety practices when operating, installing, or
removing the unit.
• Use caution when troubleshooting a unit that has voltages
present. Turn off power to the unit before removing it.
• Ensure that the internal temperature of the rack or cabinet
does not exceed the limits defined for the drive when the drive
is mounted in an equipment rack or cabinet. When units are
stacked vertically, pay special attention to the top where tem-
peratures are usually highest.
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Barracuda 18FC Installation Guide, Rev. 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 perform-
ing depot repair will damage components and may void the
warranty.
• 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 repair-
able. If the sealed HDA is opened by personnel not performing
depot repair, this will damage components and void the war-
ranty.
As a component, the drive is designed to be installed and oper-
ated 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 applica-
tions of these disc drives include customer packaging and sub-
system design. Safety agencies conditionally certify component
assemblies, such as the Barracuda disc drive, based on their
final acceptability in the end-use product. The subsystem
designers are responsible for meeting these conditions of
acceptability in obtaining safety-regulatory agency compliance in
their end-use products and for certifying where required by law.
A necessary part of meeting safety requirements is the provision
for overcurrent protection on drive SELV supply voltages.
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4
Barracuda 18FC Installation Guide, Rev. 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.
Beim Testen des Laufwerks auf dem Prüftisch ist
Fremdbelüftung vorzusehen, um eine ausreichende Kühlung der
Laufwerkkomponenten sicherzustellen.
Verwenden Sie geeignete Sicherheits- um den sicheren, zuver-
lässigen 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 gewählte Verfahren weder Ihre
persönliche Sicherheit noch die Leistung der Einheit gefährdet.
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Barracuda 18FC Installation Guide, Rev. 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 Sicherheitsvorkehrun-
gen.
• Wenn eine Einheit unter Spannung steht, gehen Sie bei der
Fehlerdiagnose besonders vorsichtig vor. Schalten Sie die
Einheit aus, bevor Sie mit den Installations-und Entfernungsar-
beiten beginnen.
• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse
montiert ist, sorgen Sie dafür, daß die Temperatur im Inneren
des Gestells oder Gehäuses die für das Laufwerk vorgege-
benen Grenzwerte nicht übersteigt. Wenn Einheiten vertikal
übereinander betestigt werden, achten Sie besonders auf den
oberen Stapelbereich, da dort die Temperatur gewöhnlich am
höchsten ist.
• Befolgen Sie die oben unter “Electrostatic Discharge Protec-
tion” angegebenen Sicherheitsmaßnahmen.
• Nehmen Sie keine Platinen aus dem 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 zustän-
digen kann zu einer Beschädigung der Komponenten und
Erlöschen des Garantieanspruchs führen.
• Die vormontierte Kopf- und Festplatteneinheit (HDA) nicht aus
dem Laufwerk nehmen! Falls die HDA beschädigt ist, schicken
Sie das gesamte Laufwerk zur Reparatur ein.
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6
Barracuda 18FC Installation Guide, Rev. A
• Die HDA ist nicht vor Ort reparierbar und darf nicht auseinan-
dergenommen werden! Öffnen der versiegelten HDA durch
andere Personen als die für die werkseitige Reparatur zustän-
digen hat eine Beschädigung der Komponenten und
Erlöschen des Garantieanspruchs zur Folge.
Als Teilkomponente ist dieses Laufwerk für die Installation und
den Betrieb in Übereinstimmung mit UL 1950, EN60950,
CAN\CSA C22.2 950-95 und VDE0805 vorgesehen.
Seagate ist ständig bemüht, die Zulassungsfähigkeit von
Seagate-Produkten im Rahmen der gegenwärtig geltenden
Standards zu gewährleisten. Zu den typischen Anwendungen
dieser Festplattenwerke zählen Systemeinbau durch den
Kunden und die Konstruktion von Untersystemen. Sicherheitsbe-
hörden gewähren eine bedingte Zulassung für Komponenten wie
das Barracuda-Festplattenlaufwerk vorbehaltlich der endgültigen
Zulasssung im Endprodukt. Designer von Untersystemen sind
dafür verantwortlich, die Voraussetzungen für die Einhaltung
sicherheits- oder aufsichtsbehördlicher Vorschriften in ihren
Endprodukten und - falls gesetzlich vorgeschrieben - für die
Zulassung zu schaffen. Eine Grundvoraussetzung zur Einhal-
tung der Sicherheitsanforderungen ist die Bereitstellung eines
Überlastschutzes für die SELV-Versorgungsspannungen des
Laufwerks.
Dieses Gerät ist eine Baugruppe und unterliegt als solche nicht
den Anforderungen der FCC oder ähnlicher nationaler Behörden
für eigenständige Geräte. Technische Testergebnisse zu elektro-
magnetische Strahlung sind für Designer von Untersystemen auf
Anfrage von der Seagate-Sicherheitsabteilung erhältlich.
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Barracuda 18FC Installation Guide, Rev. A
7
European Union Compliance
If this model has the CE Marking, it complies with the European
Union requirements of the Electromagnetic Compatibility Direc-
tive 89/336/EEC of 03 May 1989 as amended by Directive 92/31/
EEC of 28 April 1992 and Directive 93/68/EEC of 22 July 1993.
Australian C-Tick
If this model has the C-Tick Marking, it complies with the Austra-
lia/New Zealand Standard AS/NZS3548 1995 and meets the
Electromagnetic Compatibility (EMC) Framework requirements
of Australia’s Spectrum Management Agency (SMA).
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, Pentium, and PowerPC 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.
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8
Barracuda 18FC Installation Guide, Rev. A
Seagate Technology support services
Presales support
To determine which Seagate products are best suited for your
specific application, contact us about configuration and compati-
bility and for current product availability. You can leave a voice
message after business hours or send an e-mail message—we
reply during business hours.
Disc Drives 1-877-271-3285 or 405-936-1210
A.M.
P M
P M
P.M.
Fax: 405-936-1683 (8:00
to 12:15 . ., 1:30 . . to 6:00 ,
central time, M-F); e-mail: [email protected]
Tape Products 1-800-626-6637 or 714-641-2500
A.M.
P.M.,
pacific time, M-F);
Fax: 714-641-2410 (6:00
to 5:00
Note. You can purchase select tape products and tape acces-
sories through Seagate Express 24 hours daily by calling
1-800-531-0968 or by faxing your order to 972-481-4812.
Technical support services
If you need assistance installing your drive, consult your dealer.
Dealers are familiar with their unique system configurations and
can help you with system conflicts and other technical issues. If
®
you need additional assistance with your Seagate drive or other
Seagate products, use one of the Seagate technical support ser-
vices listed below.
SeaFONE® 1-800-SEAGATE
Seagate’s 800 number (1-800-732-4283) allows toll-free access
to automated self-help services, providing answers to commonly
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Barracuda 18FC Installation Guide, Rev. 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 Internet from Seagate’s World Wide Web home page
ftp.seagate.com). You can also send e-mail with your questions
SeaBOARD®
SeaBOARD is a computer bulletin board system that contains
information about Seagate disc and tape drive products and is
available 24 hours daily. Set your communications software to
eight data bits, no parity, and one stop bit (8-N-1).
Location
Australia
France
Germany
Taiwan
Phone number
61-2-9756-2359
33 1-48 25 35 95
49-89-1409331
886-2-2719-6075
662-531-8111
Thailand
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10
Barracuda 18FC Installation Guide, Rev. A
Phone number
Location
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 auto-
mated FAX system to receive technical support information by
return FAX. This service is available 24 hours daily.
Location
Australia
Germany
UK
Phone number
61-2-9756-5170
49-89-14305102
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 spe-
cialists 24 hours daily. Responses are sent during business
hours.
Location
Australia
France
Phone number
61-2-9725-4052
33 1-46 04 42 50
49-89-14305100
Germany
Hong Kong 852-2368 7173
Japan
Korea
Singapore
Taiwan
81-3-5462-2979
82-2-556-4251/7395
65-488-7528
886-2-2715-2923
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Barracuda 18FC Installation Guide, Rev. A
11
Location
UK
Phone number
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 special-
ist during local business hours. Before calling, note your system
configuration and drive model number (STxxxx).
Location
Phone number
A.M.
P.M.
Australia
61-2-9725-3366 (9:00
time, M–F)
to 5:00
, eastern
A.M.
P.M.
France
33 1-41 86 10 86 (9:30
to 12:30
,
P.M.
P.M.
2:00
49-89-1409332 (9:30
P.M. P.M.
to 5:00
, M–F)
A.M.
P.M.
Germany
to 12:30
, M–F)
A.M.
,
2:00
Hong Kong 852-2368 9918 (9:00
P.M. P.M.
to 4:00
P.M.
to 12:00
, M–F)
A.M.
,
2:00
82-2-531-5800 (9:00
P.M. P.M.
to 5:30
P.M.
,
Korea
to 12:00
, M–F)
A.M.
1:00
65-488-7584 (9:00
P.M.
to 6:00
P.M.
to 12:00 , 2:00
P.M.
Singapore
to 5:00
, M–F)
Taiwan
UK
886-2-2514-2237
44-1628-894083 (10:00
A.M.
P.M.
,
to 1:00
P.M.
P.M.
, M–F)
2:00
to 5:00
USA
Please dial 1-800-SEAGATE or 405-936-1234
for the specific product telephone number.
A.M.
P.M.
P.M.
P.M.
to 6:00 ,
(8:00
central time, M–F)
to 12:15
, 1:30
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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
to
P.M.
12:15 P.M. and 1:30 P.M. to 6:00
through Friday.
(central time) Monday
Customer service centers
Seagate direct OEM, Distribution, and Systems Integrator cus-
tomers should contact their Seagate service representative for
warranty information. Other customers should contact their place
of purchase. Seagate offers comprehensive customer support
for all Seagate drives. These services are available worldwide.
Location
Phone number
65-485-3595
31-2031-67222
31-2031-67222
FAX number
Asia Pacific and Australia
Middle East and Africa
Europe
65-488-7503
31-2065-34320
31-2065-34320
European toll-free phone numbers are available for you to contact
customer service representatives between 8:30 A.M. and 5:00 P.M.
(European central time) Monday through Friday. The European call
center is located in Amsterdam, The Netherlands.
Location
Toll-free phone number
0 800-20 12 90
0 800-74 876
Austria
Belgium
Denmark
France
Germany
Ireland
80 88 12 66
0 800-90 90 52
0 800-182 6831
1 800-55 21 22
1 677 90 695
Italy
Netherlands
0 800-732 4283
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Barracuda 18FC Installation Guide, Rev. A
13
Location
Toll-free phone number
Norway
800-113 91
Poland
Spain
00 800-311 12 38
900-98 31 24
Sweden
Switzerland
Turkey
0 207 90 073
0 800-83 84 11
00 800-31 92 91 40
0 800-783 5177
United Kingdom
Location
Phone number
FAX number
Japan
USA
81-3-5462-2904 81-3-5462-2979
1-800-468-3472 405-949-6740
Other Americas (Brazil,
Canada, Mexico)
405-949-6706
405-949-6738
Manufacturer’s representatives
Brazil
MA Informatica
55-21-516-6649 55-21-516-5280
Canada
Memofix
Adtech
905-660-4936
905-812-8099
1-800-624-9857
905-660-4951
905-812-7807
Mexico
Abicom Seamax
SA DE CV
Southern Europe
Caesar Italia
525-546-4888
39-688-18149
525-546-4888
39-688-02103
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14
Barracuda 18FC Installation Guide, Rev. A
General description
Barracuda 18FC disc drives are high-speed, random-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 Barra-
cuda 18FC Product Manual (part number 77767524) contains
guidelines for a properly designed enclosure.
Figure 1:
Barracuda 18FC disc drive
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Barracuda 18FC Installation Guide, Rev. 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/track
7,501
20
155,000
Access time
Average read (msec)
Average write (msec)
7.9
8.7
Disc rotation
RPM
Average latency (msec)
7,200
4.17
Data transfer rate
Maximum instantaneous
(Mbytes/sec, per port)
106
1. The specified formatted capacities are calculated with the standard OEM
sector size (512 bytes per logical block) and sparing.
ST118273FC
DC power requirements(±5%)1
+5 V
+12 V
Maximum start current
Maximum operating current
Average idle current
1.70A
1.70A
1.50A
3.1A
1.30A
0.80A
1. For more detailed power information, refer to the Barracuda
18FC Product Manual, publication number 77767524.
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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 con-
nector attachment (FC-SCA). There are no jumpers or termina-
tors on the drive, and power is supplied through the connector.
Table 1 on page 25 lists the pin descriptions of the 40-pin FC-
SCA.
Read the following general information topics to ensure your
drive is installed properly:
• Providing adequate cooling
• Mounting the drive
• Formatting the drive
Providing adequate cooling
The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperature is 50oC (30oC for the
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 evalu-
ate 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 sources.
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Barracuda 18FC Installation Guide, Rev. A
17
Figure 2 shows one design approach with one or more fans 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.
Kühlung des Systems
Die Gehäusekonstruktion muß eine ausreichende Kühlung des
Laufwerkes gewährleisten. Die Umgebungstemperatur darf max-
imal 50oC betragen (30oC für der MTBF).
Die Produkthandbuch Barracuda 18FC (Dokument 77767524)
enthalten Anweisungen zur Beurteilung der Luftstromkonstruk-
tion. Die Beurteilung muß sicherstellen, daß sich die Gehäuse-
temperatur
bestimmter
kritischer
Komponenten
bei
Laufwerkbetrieb innerhalb zugelassener Grenzen hält.Wir
empfehlen, das Laufwerk so zu orientieren oder den Luftstrom
so zu lenken, daß der geringste Luftstromwiderstand vonvorne
nach hinten oder von hinten nach vorne verlaufen.
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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)
Above unit
Under unit
Note. Air flows in the direction shown or
in reverse direction (side to side)
Figure 2: Suggested air flow
Abbildung 2. Empfohlener Luftstromverlauf
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Barracuda 18FC Installation Guide, Rev. A
19
Mounting the drive
Do not touch the connector pins or any components on the con-
trol board without observing static-discharge precautions.
Always handle the drive by the frame only.
You may mount the drive in any orientation (horizontally, verti-
cally, or any combination thereof); however, you must ensure that
the drive receives 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 mounting holes in the bottom of the drive. 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 beim Handhaben und Anfassen der Anschlußstifte
und Komponenten die Vorsichtsmaßnahmen zur Verhinderung
statischer Aufladung. Fassen Sie das Laufwerk nur am Rahmen
an.
Das Laufwerk kann in beliebiger Orientierung (horizontal, ver-
tikal oder schräg) installiert werden; jedoch muß dafür gesorgt
werden, daß ein ausreichender Luftstrom zur Kühlung des Lauf-
werkes vorhanden ist.
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
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20
Barracuda 18FC Installation Guide, Rev. A
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
Schraube nicht ohne Widerstand einschrauben läßt, sind die
Gewinde nicht korrekt aneinander ausgerichtet.
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Barracuda 18FC Installation Guide, Rev. A
21
A
[1]
F
M
C
L
D
E
Notes:
B
Mounting holes three on each side,
6-32 UNC. Max screw length into
side of drive is 0.15 in. (3.81 mm).
[1]
H
1.875±.005
1.875±.005
Mounting holes four on bottom,
6-32 UNC. Max screw length into
bottom of drive is 0.15 in. (3.81 mm).
[2]
Keep-out zone for any components
on backplane.
[3]
[4]
J
Connector is centered on module
and flush with end of base.
Inches
Millimeters
K
A
B
C
D
E
F
5.75 ± 0.025 146.05 ± .64
4.00 ± 0.015 101.6 ± .381
1.026 max
.620 ref
26.060 max
15.748 ref
[2]
4.000 ± 0.010 101.600 ± .25
.250
+
–
0.011
0.005
6.350 + .28
– .12
N
H
J
K
L
3.750 ± 0.010 95.25 ± .25
2.380 ± 0.010 60.45 ± .25
1.750 ± 0.010 44.450 ± .50
.136
Motherboard Ref.
P
(.809)
[4]
0.181
+
–
+
–
0.013
0.007
4.590 + .33
– .18
Pin 1
M
1.622
0.027 41.20 + .69
0.021 – .53
Low
Common centerline
in the horizontal
(X axis) direction
of the drive
[3]
R
Profile
N
P
R
1.620 ± 0.025 41.150 ± .64
.1215 max
.1215 max
3.080 max
3.080 max
Half
Height
Figure 3: Dimensions
Abbildung 3: Laufwerkabmessungen
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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 pro-
vide 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 sys-
tem.
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
unless you intend to erase all user data).
Note. Seagate is not responsible for lost user data.
1. Supply DC power to the drive (power is supplied to the drive
through 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.
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Barracuda 18FC Installation Guide, Rev. 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.
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.
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 docu-
mentation. 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 “Seagate Technology support services” on page 8).
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 appropri-
ate external current-limiting resistor.
Note. The LED is on when the drive is idle and off when the
drive is processing commands.
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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 resistor in series with this LED driver.
Tie 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 external current-limiting resistor is required when connecting
an LED to this pin. Connect the minus side of the resistor/LED
combination to this pin. Connect the plus side to +5V. This pin is
connected in parallel with the signal of the same name in the in-
terface connector (J1).
[3] Jumper storage location (across pins 2 and 4).
Figure 4: LED indicator connector (J6)
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Barracuda 18FC Installation Guide, Rev. A
25
Table 1:
FC-SCA pin descriptions
Signal name
Pin/contact
Signal type
1*
–EN bypass port A
12 Volts
TTL output
2*
3*
12 Volts
4*
12 Volts
5*
–Parallel ESI
Ground[1]
Active LED out
Reserved
Start_1
6*
7*
Open collector out
8*
9*
TTL input
10*
11*
12*
13*
14*
15*
16*
17*
18*
19*
20*
21
Start_2
TTL input
–EN bypass port B
SEL_6
TTL output
TTL input/output
TTL input/output
TTL input/output
TTL input/output
Open collector out
SEL_5
SEL_4
SEL_3
Fault LED out
Reserved NC
Reserved NC
5 Volts
5 Volts
12 Volts charge
Ground
22
23
Ground
24*
25*
+Port A_in
–Port A_in
Diff. PECL input pair
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26
Pin/contact
Barracuda 18FC Installation Guide, Rev. A
Signal name
Signal type
26
Ground
27*
28*
29
+Port B_in
–Port B_in
Ground
Diff. PECL input pair
30*
31*
32
+Port A_out
–Port A_out
Ground
Diff. PECL output pair
Diff. PECL output pair
33*
34*
35
+Port B_out
–Port B_out
Ground
36
SEL_2
TTL input/output
TTL input/output
TTL input/output
37
SEL_1
38
SEL_0
39
Reserved NC
5 Volts charge
40
*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.
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Barracuda 18FC Installation Guide, Rev. A
27
Troubleshooting
Before calling Seagate Technical Support, please read the pos-
sibilities discussed below. The suggestions presented here will
resolve the majority of installation problems.
General installation troubleshooting
• 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 con-
nector 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 drive.
• Check your system or backpanel documentation to
ensure you have set options in accordance with the man-
ufacturer’s recommendations. All device options, including
addresses, are set at the backpanel within the host system or
through system software. Check your host system documenta-
tion about how to set these options in your particular system.
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Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, CA 95066-4544, USA
Publication Number: 77767525, Rev. A, Printed in USA
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