Seagate ST423451N, ST423451W, ST423451WD User Manual

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Elite 23

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Disc Drive

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ST423451N/W/WD

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Installation Guide

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Contents

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

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

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

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

European Union Compliance.......................................................6

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

General description....................................................................12

Initial setup information............................ ..................................16

Kühlung des Systems................................................................25

Installation des Laufwerkes

und Anschluß der Kabel..........................................................27

N drives section.........................................................................34

W/WD drives section .................................................................38

All drives ....................................................................................42

©1996 Seagate Technology, Inc. All rights reserved
Publication Number: 83329130, Rev. A
September 1996

Seagate, Seagate Technology, and the Seagate logo are regis-

tered trademarks of Seagate Technology, Inc. Elite, SeaFAX,
SeaFONE, SeaNET, SeaTDD, and SeaBOARD are either trade­marks or registered trademarks of Seagate Technology, Inc. All
other trademarks or registered trademarks are the propery of
their respective owners.

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

Elite 23 Installation Guide, Rev. A 1

Preface

This manual contains information for users of the Seagate®
ST423451 Elite 23 SCSI disc drives. It provides support ser­vices, performance specifications, and initial setup inform ation.
Additional information is available in the
(part number 83329140). Contact your Seagate sales represen­tative if you need to order this publication.

Electrostatic disch arge protecti 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
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 general rule,
remember that you and the drive electronics must all be
grounded to avoid potentially damaging static discharges.

Elite 23 Product Manual

2 Elite 23 Installation Guide, Rev. A

• Turn off the power before removing or installin g the DC power

cable.

• Do not remove any circuit boards from the drive.

• Never use an ohmmeter on any circuit boards.

• When installing th e drive on a carrier or t ray, discharge the

carrier or tray prior to inserting it into the system.

Important safety inform ati on and precau tion s

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 oth­ers. The cautions point out conditions or practices that may dam­age 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 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.

Elite 23 Installation Guide, Rev. A 3

• Follow the precautions listed above in “Electrostatic discharge

protection.”

• Do not remove any circuit boards from the drive. 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.

• Return the entire drive for depot repair if the HDA is defective.

• Do not attempt to disassemble the HDA. It is n ot field repair-

able. If the sealed HDA is opened by personnel not performing
depot repair, this will damage components and void the
warranty.

As a component, this drive is d esigned to be installe d and op er­ated in accordance with UL1950, EN60950, CSA C22.2 950­M89, and VDE0805.

Seagate takes all reasonable steps to ensure that its products
are certifiable to currently accepted standards. Typical applica­tions of these disc drives include customer packaging and sub­system design. Safety agencies conditionally certi fy component
assemblies, such as the Elite 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 volta ges.

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

4 Elite 23 Installation Guide, Rev. A
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, zuver­lässigen Betrieb dieser Einheit zu gewährleisten.

Die Verfahren in diesem Handbuch und die Aufkleber auf de m
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.

Beachten Sie in jedem Fall die folgenden Warn-und Vorsicht­shinweise:

Elite 23 Installation Guide, Rev. A 5

• Beachten Sie alle Warn- und Vorsichtshinweise in diesem

Handbuch.

• Treffen Sie beim Betrieb, bei der Installation oder bei der

Entfernung der Einheit angemessene Sicherheitsvorkehrun­gen.

• Wenn eine Einheit unter Spannung steht, gehen Sie bei der

Fehlerdiagnose besonders vorsichtig vor. Schalten Sie die
Einheit aus, bevor Sie mit den In stallations-und Entfernung­sarbeiten 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 vorgege­benen Grenzwerte nicht übersteigt. Wenn Einheiten vertikal
übereinander betestigt werden, achten Sie besonders auf den
oberen Stapelbereich, da dort die Temperatur gewöhnlich am
höchsten ist.

• Befolgen Sie die oben unter “Electrostatic Discharge Protec-

tion” 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 andere Personen als die für die wer kseitige 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 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 zustän-

6 Elite 23 Installation Guide, Rev. A

digen hat eine Beschädigung der Komponenten und
Erlöschen des Garantieanspruchs zur Folge.

Als Teilkomponente ist dieses Laufwerk für die Inst allation un d
den Betrieb in Übereinstimmung mit UL 1950, EN60950, CSA
C22.2 950-M89 und VDE0805 vorgesehen.

Seagate ist ständig bemüht, die Zulassungsfähigkeit von
Seagate-P rodukten im Rahmen der gegenwä rtig gelten den
Standards zu gewährleisten. Zu den typischen Anwendungen
dieser Festplattenwerke zählen Systemeinbau durch den
Kunden un d die Ko nstruk tion von Unt ersystemen. Sicherheits­behörden gewähren eine bedingte Zulassung für Komponenten
wie das Elite-Fe stplattenl aufwer k vorbehaltlich d er endgül tigen
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 - f ür die
Zulassung zu schaffen. Eine Grundvoraussetzung zur Einhal­tung der Sicherheitsanforderungen ist die Bereitstellung eines
Überlastschutzes für die SELV-Versorgungsspannungen des
Laufwerks.

Dieses Gerät ist ei ne Baugruppe und unt erliegt als solche nicht
den Anforderungen der FCC oder ähnlicher nationaler Behörden
für eigenstä ndige G eräte. T echnische Te sterge bnisse z u elek­tromagnetische Strahlung sind für Designer von Unt ersystemen
auf Anfrage von der Seagate-Sicherheitsabteilung erhältlich.

European Uni on Compl i ance

If this model has the CE Marking, it complies with the European
Union requirements of the Electromagnetic Compatibility Di rec-

Elite 23 Installation Guide, Rev. A 7
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.
Seagate uses an independent laboratory to confirm c ompliance

to the above directives. The drive was tested in a representative
system for typical applications. The sele cted 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
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 Elite 23 Installation Guide, Rev. A

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 ser­vices listed below.

SeaFONE at 1-800-SEAGATE (1-800-732-4283)

Seagate’s 800 number allows toll-fre e access to automated self­help services, providing answers to commonly-asked questions,
troubleshooting tips, and specifications for disc drives and ta pe
drives. This service is available 24 hours daily and requires a
touchtone phone. If you need to speak to a technical support
engineer, use this number to determine the correct access num­ber to dial. (International callers may also reach this automated
self-help service by dialing 408-456-4496).

Seagate Techno logy On line serv ice s

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

Seagate’s Intern et connections—you can obtain technical infor­mation on Seagate drives, Seagate software, and much more
over the Internet from Seagate’s World Wid e Web home page
(http://www.seagate.com) or Seagate’s ftp server (ftp://ftp.
seagate.com).

Elite 23 Installation Guide, Rev. A 9

SeaBOARD

SeaBOARD is a computer bulletin board system that contains
information about Seagate Technology disc and tape drive prod­ucts and is available 24 hours daily. Set your communications
software to ei ght data bits, no parity, and one sto p bit (8-N-1).
SeaBOARD phone numbers are listed in the following table.

BBS Location Modem number

United States Disc: 408-434-1081;

Tape: 408-456-4415
England 44-1628-478011
France 33 1-48 25 35 95
Germany 49-89-140-9331
Singapore 65-292-6973
Thailand 662-531-8111
Australia 61-2-9756-2359
Taiwan 886-2-719-6075

Seagate Technology Forum on CompuServe

Online technical support for Seagate products is available on
CompuServe. To access our technical support forum, type

seagate

SeaBOARD. In addition, you can type questions or browse
through previous questions and answers on the forum mes­sages.

. This forum provides information similar to that found on

go

10 Elite 23 Installation Guide, Rev. A

Seagate Techno logy FAX servi ces

SeaFAX

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

Location Telephone number

United States 1-800-SEAGATE or 408-456-4496
England 44-1628-894084
Australia 61-2-9756-5170

Seagate technical support FAX

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

Location Fax number

United States 408-944-9120 (8:00

Pacific time, M–F)
England 44-1628-894089
France 33 1-48 25 28 61; 33 1-46 04 42 50

(9:00

A.M.–6:00 P.M., M–F)

Germany 49-89-149-8916-6
Australia 61-2-9725-4052
Singapore 65-293-4722
Hong Kong 852-2689-7173
Taiwan 886-2-715-2923
Korea 82-2-556-7294/4251

A.M.–5:00 P.M.

Elite 23 Installation Guide, Rev. A 11

Seagate technical support line

You can talk to a technical support specialist during business
hours Monday through Friday for one-on-one technical help.
Before calling, note your system confi guration and drive model
number (ST

xxxx

). There are several technical support phone

numbers available for various Seagate products.

Location Telephone number

United States Please dial 1-800-SEAGATE for the

specific product telephone number.

(6:00

A.M.–5:00 P.M., M–F)

England 44-1628-894083
France 33 1-41 86 10 86 (9:30

12:30

P.M., 2:00 P.M. –5:00 P.M., M–F)

A.M.–

Germany Disc: 49-89-140-9332;

Tape: 49-89-140-9333
Australia 61-2-9725-3366

Singapore 65-290-3998
Hong Kong 852-2368 9918
Taiwan 886-2-514-2237
Korea 82-2-556-8241

SeaTDD 408-944-9121

Using a telecommunications device for the deaf (TDD), you can
send questions or comments 24 hours daily and exchange mes­sages with a technical support specialist between 6:00
5:00

P.M. (Pacific time) Monday through Friday.

A.M. and

12 Elite 23 Installation Guide, Rev. A

General description

Elite 23 SCSI disc drives are high-speed, random-access digital­data storage devices.

The drive i s a componen t for installation in an enclos ure
designed for the drive. This is often a rack within the system or
an external enclosure designed to hous e one or more disc drives
or other peripheral units. In either case, the disc drive must
receive adequate cooling (refer to “Providing ad equate cooling” )
and it must be sufficiently grounded and shielded from emis­sions. The
contains guidelines for a properly designed enclosure.

Elite 23 Product Manual

(part number 83329140)

Figure 1. Elite 23 disc drive

(N model shown)

Elite 23 Installation Guide, Rev. A 13

Table 1: Drive characteristics

Interface UltraSCSI

1

Capacity

Unformatted 29.6 Gbytes
Formatted

2

23.4 Gbytes

Recording

Cylinders (user) 6,880
Read/write data heads 28
Servo heads Embedded

Seek time (typical)

3

Average read 13.2 msec
Average write 14.2 msec

Disc rotation

r/min 5,400 +

0.5%

Average latency 5.55 msec

Internal transfer rate 85.9 to 123

(Mbits/sec, variable with zone)

Max sync. SCSI transfer rate

N 20 Mbytes/sec
W/WD 40 Mbytes/sec

Multi-segmented cache 2,048 Kbytes

1

Can also be operated according to SCSI-1 and SCSI-2 proto-

cols.

2

Standard factory units are f ormatted as follows:

512 data bytes per sector
6 cylinders per region
82 spares per region

3

Not including on-board controller overhead.