Seagate ST373455LC - Cheetah 73.4 GB Hard Drive User manual

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Barracuda 18LP
Disc Drive
ST39175LW/LC
ST318275LW/LC
Installation Guide

Contents
Preface.........................................................................................1
Electrostatic discharge protection................................................1
Important safety information and precautions..............................2
Wichtige Sicherheitshinweise ......................................................4
Regulatory agency compliance....................................................7
Seagate Technology support services.........................................9
General description....................................................................15
Initial setup information..............................................................19
Kühlung des Systems ................................................................30
Installation des Laufwerkes
und Anschlußder Kabel..........................................................32
LW drives section.......................................................................40
LC drives section .......................................................................45
©1997-1999 Seagate Technology, Inc. All rights reserved
Publication Number: 77767527, Rev. B
May 1999
Seagate, Seagate Technology, and the Seagate logo are regis-
tered trademarks of Seagate Technology, Inc. Barracuda,
SeaFAX, SeaFONE, SeaBOARD, and SeaTDD 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.

Barracuda 18LP Installation Guide, Rev. B 1
Preface
This manual contains information for users of the Seagate®
Barracuda 18LP SCSI disc drives. It provides support services,
performance specifications, and initial setup information. Addi-
tional information is available in the
Barracuda 18LP Product
Manual
(part number 77767526). Contact your Seagate sales
representative if you need to order this publication.
Note. If any differences exist between specification values in
this guide and the product manual, the product manual
values are the authoritative values.
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,

2 Barracuda 18LP Installation Guide, Rev. B
remember that you and the drive electronics must all be
grounded to avoid potentially damaging static discharges.
•Turn off the power before removing or installing the DC power
cable.
•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 car-
rier 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

Barracuda 18LP Installation Guide, Rev. B 3
stacked vertically, pay special attention to the top where tem-
peratures are usually highest.
•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.
•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
warranty.
As a component, this drive is designed to be installed and oper-
ated in accordance with UL1950, EN60950, CAN/CSA C22.2
950-95, and VDE0805.
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 Barracuda 18LP Installation Guide, Rev. B
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 Mindestmaßzu 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, daßdas gewählte Verfahren weder Ihre
persönliche Sicherheit noch die Leistung der Einheit gefährdet.

Barracuda 18LP Installation Guide, Rev. B 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, daßdie 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, mußdas 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 Barracuda 18LP Installation Guide, Rev. B
•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.

Barracuda 18LP Installation Guide, Rev. B 7
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
Table 2, DC power requirements.
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.

8 Barracuda 18LP Installation Guide, Rev. B
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).

Barracuda 18LP Installation Guide, Rev. B 9
Seagate Technology support services
Online Services
Internet
For online information about Seagate products, visit
www.seagate.com or e-mail your disc or tape questions to:
Presales Support:
Disc: http://www.seagate.com/support/email/
email_presales.shtml
or [e-mail]
Tape: http://www.seagate.com/support/email/
email_tape_presales.shtml
or
[e-mail]
Technical Support :
Disc: http://www.seagate.com/support/email/
email_disc_support.shtml
or [e-mail]
Tape: http://www.seagate.com/support/email/
email_tape_support.shtml
or [e-mail]
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). This service is
available worldwide.
Automated Services
SeaFONE
® (
1-800-SEAGATE)
is Seagate's toll-free number (1-
800-732-4283) to access our automated self-help services.
Using a touch-tone phone, you can find answers to service
phone numbers, commonly asked questions, troubleshooting

10 Barracuda 18LP Installation Guide, Rev. B
tips and specifications for disc drives and tape drives 24 hours
daily. International callers can reach this service by dialing +1-
405-936-1234.
SeaFAX
®
is Seagate's automated FAX delivery system. Using a
touch-tone phone, you can obtain technical support information
by return FAX 24 hours daily. This service is available worldwide.
Presales Support
Our Presales Support staff can help you determine which
Seagate products are best suited for your specific application or
computer system.
Seagate Express
You can purchase select tape products and tape accessories
through Seagate Express 24 hours daily by calling 1-800-531-
0968 or by faxing your order to: [phone].
Technical Support
If you need help installing your drive, consult your dealer. Deal-
ers are familiar with their unique system configurations and can
help you with system conflicts and other technical issues. If you
need additional help, you can talk to a Seagate technical support
specialist. Before calling, note your system configuration and
drive model number (ST
####).
SeaTDD™([phone])
is a telecommunications device
for the deaf (TDD). You can send questions or comments 24
hours daily and exchange messages with a technical support
specialist from 8:00 A.M. to 12:15 P.M. and 1:30 P.M. to 6:00
P.M. (central time) Monday through Friday.

Barracuda 18LP Installation Guide, Rev. B 11
Customer Service (CSO)
Warranty Repair
Seagate offers worldwide customer support for Seagate drives.
Seagate direct OEM, Distribution and System Integrator custom-
ers should contact their Seagate service center representative
for warranty information. Other customers should contact their
place of purchase.
Authorized Service Centers
If you live outside the US, you can contact an Authorized Service
Center for service or repair.
USA/Canada/Latin America Support Services
Presales Support
Disc: 1-877-271-3285 or FAX: [phone]
[phone]
Tape: 1-800-626-6637 or FAX: [phone]
[phone]
Technical Support (SeaFONE)
1-800-SEAGATE or [phone] (for specific product
phone number)
FAX:
Disc: + 1-405-936-1685; Tape: [phone]
SeaFAX 1-800-SEAGATE
SeaTDD [phone]
SeaBOARD
Disc: + 1-405-936-1600; Tape: [phone]

12 Barracuda 18LP Installation Guide, Rev. B
Warranty Repair
USA 1-800-468-3472 FAX: [phone]
Mexico and
Latin America [phone] FAX: [phone]
Authorized Service Centers
Brazil
MA Informatica [phone] FAX: [phone]
Canada
Memofix
1+1-905-660-4936 FAX: [phone]
Adtech
1+1-905-812-8099 or FAX: [phone]
1-800-624-9857
European Support Services
For European customer support, dial the toll-free number for
your specific country for presales support, technical support,
SeaFAX and warranty repair.
If your country is not listed here, dial our European call center at
[phone] from 8:30 A.M. to 5:00 P.M. (European central
time) Monday through Friday. The European call center is
located in Amsterdam, The Netherlands.
Call Center
Austria 0 800-20 12 90
Belgium 0 800-74 876
Denmark 80 88 12 66
France 0 800-90 90 52
Germany 0 800-182 6831
Ireland 1 800-55 21 22
1Authorized Service Centers

Barracuda 18LP Installation Guide, Rev. B 13
Italy 1 677 90 695
Netherlands 0 800-732 4283
Norway 800-113 91
Poland 00 800-311 12 38
Spain 900-98 31 24
Sweden 0 207 90 073
Switzerland 0 800-83 84 11
Turkey 00 800-31 92 91 40
United Kingdom 0 800-783 5177
SeaBOARD
Germany [phone]
Fax Services—All European Countries
Presales/Technical Support/Warranty Repair [phone]
Africa/Middle East Support Services
For presales, technical support, warranty repair and FAX ser-
vices in Africa and the Middle East, dial our European call center
at [phone] from 8:30 a.m. to 5:00 p.m. (European cen-
tral time) Monday through Friday, or send a FAX to +31-20-653-
3513. The European call center is located in Amsterdam, The
Netherlands.
Asia/Pacific East Support Services
Technical Support
Australia [phone] FAX: [phone]
Hong Kong [phone] FAX: [phone]
Japan —FAX: [phone]
Singapore [phone] FAX: [phone]
Taiwan [phone] FAX: [phone]

14 Barracuda 18LP Installation Guide, Rev. B
SeaFAX
Australia [phone]
Warranty Repair
Japan [phone] FAX: [phone]
Asia/Pacific and [phone] FAX: [phone]
Australia

Barracuda 18LP Installation Guide, Rev. B 15
General description
Barracuda 18LP SCSI disc drives are high-speed, random-
access digital-data storage devices.
The drive is a component for installation in an enclosure
designed for the drive. This is often a rack within the system or
an external enclosure designed to house one or more disc drives
or other peripheral units. In either case, the disc drive must
receive adequate cooling (refer to “Providing adequate cooling”)
and it must be sufficiently grounded and shielded from emis-
sions. The
Barracuda 18LP Product Manual (part number
77767526) contains guidelines for a properly designed
enclosure.
*Model “LW”version with 68-pin SCSI I/O connector
Figure 1. Barracuda 18LP family drive
*

16 Barracuda 18LP Installation Guide, Rev. B
Table 1. Drive characteristics
Interface UltraSCSI [1]
Capacity Formatted [2] Max. data blocks [2]
ST39175 9.1 Gbyte [2] 10F59C7h [2]
ST318275 18.2 Gbyte [2] 21EB38Fh [2]
Recording
Cylinders (user) 11,721
Read/write data heads
ST39175 5
ST318275 10
Access time [3]
Average read 6.9 msec
Average write 7.7 msec
Disk rotation
RPM 7,200 r/min
Average latency 4.17 msec
Internal transfer rate (variable with zone)
ST39175 137–240 Mbits/sec
ST318275 137–240 Mbits/sec
Maximum synchronous SCSI transfer rate
LW/LC 80 Mbytes/sec
[1] Operated according to SCSI-2 and SCSI-3 protocols. Referred to
also as “SCSI Fast-20”and “Fast-40.”
[2] Read data capacity. Add one for total capacity. Standard factory
units are formatted 512 data bytes per sector with spare tracks
reserved for reallocating bad sectors.
[3] Includes controller overhead.

Barracuda 18LP Installation Guide, Rev. B 17
Table 2. DC power requirements (Amps), multimode
(SE/LVD)
[1] Measured with an average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
[2] A –10% droop is permissible during initial start of the spindle
but must return to ±5% before reaching 7,200 RPM. The
±5% must be maintained after the drive signifies that its
power-up sequence has been completed and that the drive is
able to accept selection by the host initiator.
[3] See the +12V current profile in the
Barracuda 18LP Product
Manual
(publication number 77767526).
[4] This condition occurs when the Motor Start option is enabled
and the drive has not yet received a Start Motor command.
ST39175LW/LC ST318275LW/LC
Voltage +5V +12V +5V +12V
Regulation [5] ±5% ±5%[2] ±5% ±5%[2]
Avg. idle current
DCX [1] 0.75 0.35 0.75 0.5
Max. starting current
(peak DC) [3]
(peak AC) [3] 1.0 —1.3 2.4 1.05 —1.6 2.4
Delayed motor
start (max) [1][4] 0.65 0.05 0.65 0.05
Peak operating current
Typical DCX [1][6]
Maximum DC [1]
Maximum (peak)
1.0
1.3
1.7
0.7
1.4
2.1
1.05
1.4
1.7
0.8
1.5
2.4

18 Barracuda 18LP Installation Guide, Rev. B
[5] See “Conducted noise immunity”in the Barracuda 18LP
Product Manual.
The specified voltage tolerance is inclusive
of ripple, noise, and transient response.
[6] Operating condition is defined as random seek read opera-
tions with a block count of 64.
General Notes from Table 2.
1. Minimum current loading for each supply voltage is not less
than 4% of the maximum operating current shown.
2. Use separate ground returns for +5V and +12V supplies.
3. Where power is provided to multiple drives from a common
supply, carefully consider individual drive power require-
ments. Where multiple units are powered on simultaneously,
be sure the peak starting current is available to each device.
Table 3 shows the nominal (no tolerance specified) dimensions
and weight of the drive.
Table 3. Dimensions of the drive
inches mm
Height 1.00 25.4
Width 4.00 101.6
Depth 5.75 146.05
Weight 1.5 pounds (0.589 kilograms)