Seagate CHEETAH ST34501FC User manual

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Cheetah 4LP FC
Fibre Channel
Disc Drive
ST34501FC
Installation Guide

Contents
Preface........................................................................................ 1
Electrostatic discharge protection ............................................... 1
Important safety information and precautions............................. 2
Wichtige Sicherheitshinweise...................................................... 4
Regulatory agency compliance................................................... 8
Seagate technical support services .......................................... 10
General description................................................................... 15
Installing the Cheetah 4LP FC drive.......................................... 17
Kühlung des Systems................................................................ 18
Troubleshooting......................................................................... 27
©1996, 1997 Seagate Technology, Inc. All rights reserved
Publication Number: 83329180, Rev. B
September 1997
Seagate, Seagate Technology, and the Seagate logo are regis-
tered trademarks of Seagate Technology, Inc. Cheetah, SeaFAX,
SeaFONE, SeaNET, SeaTDD, and SeaBOARD are either trade-
marks or registered trademarks of Seagate Technology, Inc. or
one of its subsidiaries. All other trademarks or registered trade-
marks 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 4LP FC Installation Guide, Rev. B 1
Preface
This manual contains information for users of Seagate Cheetah
4LP FC (Fibre Channel interface) disc drives. It provides techni-
cal support information, performance specifications, installation
instructions, and a troubleshooting section. Additional informa-
tion is available in the Cheetah 4LP FC Product Manual (part
number 83329190). 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
semiconductors 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 4LP FC Installation Guide, Rev. B
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 and repair techniques for safe, reliable opera-
tion of this unit. Service should be done only by qualified per-
sons. We recommend the procedures in this manual as effective
ways of servicing the unit. Some procedures require the use of
special tools. For proper maintenance and safety, you must use
these tools as recommended.
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.
These warnings and cautions are not exhaustive. We cannot
possibly know, evaluate, and advise you of all the ways in which
maintenance might be performed or the possible risk of each
technique. Consequently, we have not completed any such
broad evaluation. If you use a non-approved procedure or tool,

Cheetah 4LP FC Installation Guide, Rev. B 3
first ensure that the method you choose will not risk either your
safety or unit performance.
Always observe the following warnings and precautions:
• 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.
• Wear safety shoes when removing or replacing heavy parts.
• 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 are usually highest.
• Follow the precautions listed above in “Electrostatic dis-
charge 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 per-
forming depot repair will damage components and may void
the warranty.
As a component, the drive is designed to be installed and oper-
ated in accordance with UL1950, IEC950, CSA C22.2 950-M89,
and VDE0805 and EN60950.
Seagate takes all reasonable steps to ensure that its products
are certifiable to currently accepted standards.

4 Cheetah 4LP FC Installation Guide, Rev. B
Typical applications of these disc drives include customer pack-
aging and subsystem design. Safety agencies conditionally cer-
tify component assemblies, such as the Cheetah disc drive,
based on their final acceptability in the end-use product. The
subsystem designers are responsible for meeting these condi-
tions of acceptability in obtaining safety-regulatory agency com-
pliance in their end-use products and for certifying where
required by law. A necessary part of meeting safety require-
ments is the provision for overcurrent protection on drive SELV
supply voltages.
This unit is a component part and as such is not meant to comply
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- und Reparaturverfahren,
um den sicheren, zuverlässigen Betrieb dieser Einheit zu
gewährleisten. Reparaturen dürfen nur von qualifiziertem Fach-
personal vorgenommen werden. Wir empfehlen die Verfahren in
diesem Handbuch als effektive Methoden zur Wartung und Rep-
aratur der Einheit. Einige Verfahren erfordern Spezial-
werkzeuge; diese müssen zur sachgemäßen Ausführung der
Wartungsarbeiten und aus Sicherheitsgründen den Empfehlun-
gen entsprechend verwendet werden.

Cheetah 4LP FC Installation Guide, Rev. B 5
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 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.
Beachten Sie in jedem Fall die folgenden Warn-und Vorsicht-
shinweise:
• 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.

6 Cheetah 4LP FC Installation Guide, Rev. B
• Tragen Sie Sicherheitsschuhe, wenn Sie schwere Teile
aus- bzw. einbauen.
• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse
montiert ist, sorgen Sie dafür, daß die Temperatur im
Inneren des Gestells oder Gehäuses die für das Laufwerk
vorgegebenen Grenzwerte nicht übersteigt. Wenn Einheiten
vertikal übereinander betestigt werden, achten Sie
besonders auf den oberen Stapelbereich, da dort die Tem-
peratur gewöhnlich am höchsten ist.
• Befolgen Sie die oben unter “Electrostatic Discharge Pro-
tection” angegebenen Sicherheitsmaßnahmen.
• Nehmen Sie keine Platinen aus dem Laufwerkgehäuse.
Wenn 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! Falls die HDA beschä-
digt ist, schicken Sie das gesamte Laufwerk zur Reparatur
ein.
• Die HDA ist nicht vor Ort reparierbar und darf nicht ausein-
andergenommen werden! Öffnen der versiegelten HDA
durch andere Personen als die für die werkseitige Repara-
tur zuständigen hat eine Beschädigung der Komponenten
und Erlöschen des Garantieanspruchs zur Folge.

Cheetah 4LP FC Installation Guide, Rev. B 7
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. Sicherheits-
behörden gewähren eine bedingte Zulassung für Komponenten
wie das Cheetah-Festplattenlaufwerk vorbehaltlich der endgülti-
gen Zulasssung im Endprodukt. Designer von Untersystemen
sind dafür verantwortlich, die Voraussetzungen für die Einhal-
tung 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 elek-
tromagnetische Strahlung sind für Designer von Untersystemen
auf Anfrage von der Seagate-Sicherheitsabteilung erhältlich.

8 Cheetah 4LP FC Installation Guide, Rev. B
Regulatory agency compliance
Electromagnetic susceptibility
As a component assembly, the drive is not required to meet any
susceptibility performance requirements. It is the responsibility of
those integrating the drive within their systems to perform those
tests required and design their system to ensure that equipment
operating in the same system as the drive or external to the sys-
tem does not adversely affect the performance of the drive. See
DC power requirements on page 16.
Electromagnetic compliance
Seagate uses an independent laboratory to confirm compliance
to the directives/standard(s) for CE Marking and C-Tick Marking.
The drive was tested in a representative system for typical appli-
cations. The selected system represents the most popular char-
acteristics for test platforms. The system configurations include:
• 486, Pentium, and PowerPC microprocessors
• 3.5-inch floppy disc drive
• Keyboard
• Monitor/display
•Printer
• External modem
•Mouse
Although the test system with this Seagate model complies to
the directives/standard(s), we cannot guarantee that all systems
will comply. The computer manufacturer or system integrator
shall confirm EMC compliance and provide CE Marking and C-
Tick Marking for their product.

Cheetah 4LP FC Installation Guide, Rev. B 9
Electromagnetic compliance for the European Union
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).

10 Cheetah 4LP FC Installation Guide, Rev. B
Seagate 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 sup-
port services 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
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 408-456-4496.
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 ques-
tions to DiscSupport @ Seagate.com or TapeSupport @
Seagate.com.

Cheetah 4LP FC Installation Guide, Rev. B 11
Seagate CompuServe forum
Online technical support for Seagate products is available on
CompuServe. To access our technical support forum, type
go
seagate
. This forum provides information similar to that found on
SeaBOARD. In addition, you can type questions or browse
through previous questions and answers on the forum mes-
sages.
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
England 44-1628-478011
France 33 1-48 25 35 95
Germany 49-89-140-9331
Singapore TBA
Taiwan 886-2-719-6075
Thailand 662-531-8111
USA Disc: 405-936-1600; Tape: 405-936-1630

12 Cheetah 4LP FC Installation Guide, Rev. B
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.
Seagate technical support FAX
You can FAX questions or comments to technical support spe-
cialists 24 hours daily. Responses are sent during business
hours.
Location Phone number
Australia 61-2-9756-5170
England 44-1628-894084
USA 1-800-SEAGATE or 408-456-4496
Location Phone number
Australia 61-2-9725-4052
England 44-1628-890660
France 33 1-46 04 42 50
Germany 49-89-1430-5100
Hong Kong 852-2368 7173
Japan 81-3-5462-2979
Korea 82-2-556-7294/4251
Singapore 65-488-7528
Taiwan 886-2-715-2923
USA Disc: 405-936-1685; Tape: 405-936-1683

Cheetah 4LP FC Installation Guide, Rev. B 13
Direct-support services
Seagate 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 ).
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
1:15 P.M. and 2:30 P.M. to 7:00 P.M.(Central time) Monday
through Friday.
Location Phone number
Australia 61-2-9725-3366 (9:00 A.M.to 5:00 P.M., M–F)
England 44-1628-894083 (10:00 A.M.to 1:00 P.M.,
2:00 P.M.to 5:00 P.M., 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 82-2-556-8241
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 886-2-514-2237
USA Please dial 1-800-SEAGATE or 408-456-4496
for the specific product telephone number.
(8:00 A.M.to 1:15 P.M., 2:30 P.M.to 7:00 P.M.,
Central time, M–F)

14 Cheetah 4LP FC Installation Guide, Rev. B
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 65-485-4980
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 55-11-810-7794 55-21-253-6467
Canada
Memofix
Adtech 905-660-4936 905-812-8099
1-800-624-9857
905-660-8738
905-812-7807
Mexico
Abicom Seamax
SA DE CV 525-546-6965 525-546-4888

Cheetah 4LP FC Installation Guide, Rev. B 15
General description
Cheetah 4LP FC 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 Cheetah
4LP FC Product Manual (part number 83329190) contains
guidelines for a properly designed enclosure.
Figure 1: Cheetah 4LP FC disc drive

16 Cheetah 4LP FC Installation Guide, Rev. B
1. For more detailed power information, refer to the Cheetah 4LP FC Product Man-
ual, publication number 83329190.
Characteristics ST34501FC
Interface Fibre Channel Arbitrated Loop
Capacity
Unformatted (Gbytes)
Formatted (Gbytes) 5.59 4.52
Recording
Cylinders (user)
Read/write data heads
Servo heads (embedded)
Avg bytes/track
6,526
8
0
115,078
Access time
Average read (msec)
Average write (msec) 7.7 8.7
Disc rotation
RPM
Average latency (msec) 10,033 2.99
Data transfer rate
Maximum instantaneous
(Mbytes/sec) 106.3
DC power requirements (±5%)1
Maximum start current
Maximum operating current
Average idle current
+5 V
1.07A
1.08A
1.00A
+12 V
2.24A
1.08A
0.87A

Cheetah 4LP FC Installation Guide, Rev. B 17
Installing the Cheetah 4LP FC drive
To install a Cheetah 4LP FC 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 drive’s product manual (83329190) 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.

18 Cheetah 4LP FC Installation Guide, Rev. B
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 Produkthandbuch Cheetah 4LP FC (Dokument 83329190)
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.