Seagate CHEETAH 18FC User manual

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Cheetah 18FC
Fibre Channel
Disc Drive
ST118202FC
Installation Guide

Contents
Preface........................................................................................ 1
Electrostatic discharge protection ............................................... 1
Important safety information and precautions ............................. 2
Wichtige Sicherheitshinweise...................................................... 4
European Union Compliance ...................................................... 7
Seagate Technology support services......................................... 8
General description ................................................................... 14
Installing the Cheetah 18FC drive............................................. 16
Kühlung des Systems................................................................ 17
Troubleshooting......................................................................... 27
©1998 Seagate Technology, Inc. All rights reserved
Publication Number: 83329320, Rev. A
April 1998
Seagate, Seagate Technology, and the Seagate logo are regis-
tered trademarks of Seagate Technology, Inc. Cheetah, 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 owners.
No part of this publication may be reproduced in any form without
written permission from Seagate Technology, Inc.

Cheetah 18FC Installation Guide, Rev. A 1
Preface
This manual contains information for users of Seagate Cheetah
18FC (Fibre Channel interface) disc drives. It provides technical
support information, performance specifications, installation
instructions, and a troubleshooting section. Additional informa-
tion is available in the Cheetah 18FC Product Manual (part num-
ber 83329330). Contact your Seagate sales representative 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 gen-
eral rule, remember that you and the drive electronics must

2 Cheetah 18FC Installation Guide, Rev. A
all be grounded to avoid potentially damaging static dis-
charges.
• 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-

Cheetah 18FC Installation Guide, Rev. A 3
peratures are usually highest.
• Follow the precautions listed above in “Electrostatic discharge
protection.”
• Do not remove any circuit boards from the drive chassis.
Return the entire drive for depot repair if any circuit board is
defective. Removal of circuit boards by personnel not 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.

4 Cheetah 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.

Cheetah 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.

6 Cheetah 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 Cheetah-Festplattenlaufwerk vorbehaltlich der endgültigen
Zulasssung im Endprodukt. Designer von Untersystemen sind
dafür verantwortlich, die Voraussetzungen für die Einhaltung
sicherheits- oder aufsichtsbehördlicher Vorschriften in ihren End-
produkten und - falls gesetzlich vorgeschrieben - für die Zulas-
sung zu schaffen. Eine Grundvoraussetzung zur Einhaltung der
Sicherheitsanforderungen ist die Bereitstellung eines Überlasts-
chutzes 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.

Cheetah 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.

8 Cheetah 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 405-936-1210 Fax: [phone]
(8:00 A.M.to 12:15 P.M., 1:30P.M. to 6:00 P.M., central time, M-F)
e-mail: [e-mail]
Tape Products 1-800-626-6637 or 714-641-2500
Fax: [phone]
(6:00
A.M.to 5:00 P.M., pacific time, M-F)
e-mail: [e-mail]
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

Cheetah 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
(http://www.seagate.com) or Seagate’s ftp server (ftp://
ftp.seagate.com). You can also send E-mail with your questions
to DiscSupport @ Seagate.com or TapeSupport @
Seagate.com.
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 Phone number
Australia 61-2-9756-2359
France 33 1-48 25 35 95
Germany 49-89-140-9331
Taiwan 886-2-2719-6075
Thailand 662-531-8111

10 Cheetah 18FC Installation Guide, Rev. A
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.
Technical support FAX
You can FAX questions or comments to technical support spe-
cialists 24 hours daily. Responses are sent during business
hours.
UK 44-1628-478011
USA Disc: 405-936-1600; Tape: 405-936-1630
Location Phone number
Australia 61-2-9756-5170
Germany 49-89-1430-5102
UK 44-1628-894084
USA Disc: 405-936-1620; Tape: 405-936-1640
Location Phone number
Australia 61-2-9725-4052
France 33 1-46 04 42 50
Germany 49-89-1430-5100
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
Location Phone number

Cheetah 18FC Installation Guide, Rev. A 11
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 (ST
xxxx ).
UK 44-1628-890660
USA Disc: 405-936-1685; Tape: 405-936-1683
Location Phone number
Australia 61-2-9725-3366 (9:00 A.M.to 5:00 P.M., eastern
time, M–F)
France 33 1-41 86 10 86 (9:30 A.M.to 12:30 P.M.,
2:00 P.M.to 5:00 P.M., M–F)
Germany Disc: 49-89-140-9332; Tape: 49-89-140-9333
(9:30 A.M.to 12:30 P.M., 2:00 P.M.to 4:00 P.M.,
M–F)
Hong Kong 852-2368 9918
Korea 82-2-531-5800 (9:00 A.M.to 12:00 P.M., 1:00
P.M.to 6:00 P.M., M–F)
Singapore 65-488-7584 (9:00 A.M.to 12:00 P.M., 2:00 P.M.
to 5:00 P.M., M–F)
Taiwan 886-2-2514-2237
UK 44-1628-894083 (10:00 A.M.to 1:00 P.M.,
2:00 P.M.to 5:00 P.M., M–F)
USA Please dial 1-800-SEAGATE or 405-936-1234
for the specific product telephone number.
(8:00 A.M.to 12:15 P.M., 1:30 P.M.to 6:00 P.M.,
central time, M–F)
Location Phone number

12 Cheetah 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-
sages with a technical support specialist between 8:00 A.M.to
12:15 P.M. and 1:30 P.M. to 6:00 P.M.(central time) Monday
through Friday.
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 FAX number
Asia Pacific and Australia 65-485-3595 65-488-7503
Europe, Middle East,
and Africa 31-2031-67300 31-2065-34320
Japan 81-3-5462-2904 81-3-5462-2979
USA 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
905-660-8738
905-812-7807

Cheetah 18FC Installation Guide, Rev. A 13
Mexico
Abicom Seamax
SA DE CV 525-546-4888 525-546-4888
Southern Europe
Caesar Italia 39-688-18149 39-688-02103
Location Phone number FAX number

14 Cheetah 18FC Installation Guide, Rev. A
General description
Cheetah 18FC disc drives are high-speed, random-access digi-
tal-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 Cheetah
18FC Product Manual (part number 83329330) contains guide-
lines for a properly designed enclosure.
Figure 1: Cheetah 18FC disc drive

Cheetah 18FC Installation Guide, Rev. A 15
1. The specified formatted capacities are calculated with the standard OEM sec-
tor size (512 bytes per logical block) and sparing.
Characteristics ST118202FC
Interface Fibre Channel
Capacity
Unformatted (Gbytes)
Formatted (Gbytes)122.54
18.2
Recording
Cylinders (user)
Read/write data heads
Avg bytes/track
6,962
24
104,840 to 159,008
Access time
Average read (msec)
Average write (msec) 5.9 6.7
Disc rotation
RPM
Average latency (msec) 10,025 2.99
Data transfer rate
Maximum instantaneous
(Mbytes/sec per port) 106.3
ST118202FC
DC power requirements(±5%)1
1. For more detailed power information, refer to the Cheetah 18FC Product Man-
ual, publication number 83329330.
+5 V +12 V
Maximum start current
Maximum operating current
Average idle current
0.76A
0.80A
0.70A
3.2A
1.41A
1.25A

16 Cheetah 18FC Installation Guide, Rev. A
Installing the Cheetah 18FC drive
To install a Cheetah 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 (83329330) 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.

Cheetah 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 Cheetah 18FC (Dokument 83329330)
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.

18 Cheetah 18FC Installation Guide, Rev. A
Figure 2: Suggested air flow
Abbildung 2. Empfohlener Luftstromverlauf
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)