seagate ST318233LWV, ST39133LWV, ST318203LW, ST39103LW Installation Guide
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Cheetah 18LP
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Disc Drive
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ST318203LW/LWV/LC/LCV
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ST39103LW/LWV/LC/LCV
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ST318233LWV/LCV
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ST39133LWV/LCV
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Installation Guide
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Contents
Preface..................................................................................... 1
Electrostatic discharge protection ............................................ 2
Important safety information and precautions.......................... 3
Wichti g e Sic h er h e itshinwei se ........... .......... .......... ......... .......... . 5
Regulatory agency compl iance..................... .................... ....... 8
General description ................................................................ 10
Kühlung de s Sy s te ms. ... ......... .......... .......... .......... ......... ......... 13
How to install the drive ........................................................... 17
Seagate Technology supp o rt ser v ic e s........ .......... .. .......... ...... 41
©1998-2000 Seagate Technology, Inc. All rights reserved
Publication Number: 83329410, Rev. C
June 20 0 0
Seagate, Seagate Technology, and the Seagate logo are registered tra demarks 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 with-
out written permission from Seagate Technology, Inc.
Cheetah 18LP Installation Guide, Rev. C 1
Preface
This manual contains handling information, support services,
performance specifications, and installation information for
Seagate® Cheetah 18LP SCSI disc driv es.
Although you can jump ahead to the installation instructions to
get up and running quickly, you may want to read the “General
description” section beginning on page 10 to learn more about
this drive’s multimode capabilities, data bus details, specifica-
tions, and coo li ng requirements .
Additional information is available in the Cheetah 18LP Product
Manual (part number 83329400). Contact your Seagate sales
representative if you need to order this publication.
2 Cheetah 18LP Installation Guid e, Rev. C
Handling precautions
• Disc drives are fragile. Do not drop or jar the drive. Use a
padded surface during installation to avoid damaging the
drive.
• Keep the drive in its antistatic bag until you are ready to
install it .
• Protect the drive from static discharge by making sure you
are well grounded before touching the drive. We recommend
wearing a grounded wrist strap (Seagate part number
12263496) throughout the installation process. Do not touch
the connectors or any part of the printed circuit board.
• Always handle the drive by its edges or frame.
• Do not apply pressure or attach labels to the circuit board or
the top of the drive.
Electrostatic discharge protection
Caution.
performing dep ot repair will damage comp onents and
may void the warranty.
Removal of circuit boards by personnel not
All drive electronic assemblies are sensitive to static electricity
due to the electrostatically sensitive devices used within the
drive circuitry. Althou gh som e devices such as metal -oxide semi conductors are extremely sensitive, all semiconductors, as well
Cheetah 18LP Installation Guide, Rev. C 3
as some resistors and capacitors, may be damaged or degraded
by ex posure to static elec tricity.
Electrost atic damage t o electroni c de vices may be caus ed 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 yourse lf 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.
• 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 th e drive on a carrier or t ra y, discharge the car-
rier or tray pr io r to ins e rtin g it into th e sy st e m.
Important safety information and precautions
Caution.
ing the drive to e nsure prop er cooli ng of dr ive components.
Use forc ed-air vent ilation when be nch-test-
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 fol-
4 Cheetah 18LP Installation Guid e, Rev. C
lowed 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 dam age the unit, possibl y m aking it unsafe for use.
Always observe the foll owing 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 bef ore removing i t.
• 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 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 separate the head and disc assembly (HDA) from the
PCB. 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. I f the sealed HD A is opened by personn el not performing
depot repair, this will damage components and void the
warranty.
Cheetah 18LP Installation Guide, Rev. C 5
As a component, this drive is designed to be installed and oper-
ated in accordance with UL1950, EN60950, CAN/CSA C22.2
950-M95, 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 certify 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 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.
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 Sicherheit shinweise
Vorsicht.
belüftung vorzusehen, um eine ausreichende Kühlung der Laufwerkko m ponente n si ch erzust el len.
Verwenden Sie geeignete Sicherheits- um den sicheren, zuverläs-
sigen 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 Ver letzungen auf ein Mindestmaß zu beschränken oder ganz zu vermeiden.
Die Warnhinweise machen auf Situationen oder Praktiken aufmerk-
Beim Testen des Laufwerks auf dem Prüftisch ist Fremd -
6 Cheetah 18LP Installation Guid e, Rev. C
sam, di e Sie oder and e r e ge fährden könnten. Die Vorsichtshinweise
mache n auf Situ atio nen o de r Prak tiken au fmer ksam , die Ei nhei t
beschädigen können, so da ß deren Gebrauch mit Risiko behaftet ist.
Die Warn- und Vorsichtshinweise sind nicht allumfassend! Es ist uns
einfac h nic ht möglich, alle Wartungsmethoden oder die eventuellen
Risiken jeder Methode zu kennen, zu beurteilen und Sie entsprechend zu beraten . Aus d iese m G rund ha ben wir au f eine dera rt ige
umfasse nd e Beur te ilu ng verzich t et . Fall s Si e ein hier n ic ht b es c hriebenes 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:
• Beachten Sie alle Warn- und Vorsichtshinweise in diesem Handbuch.
• Treffen Sie beim Betrieb, bei der Installation oder bei der Entfernung
der Einheit an gemesse ne Sicherheitsvorkehrungen.
• Wenn eine Ei nh ei t u nt e r S p an nu ng steht , g eh en Sie bei der Feh le r diagnose besonders vorsichtig vor. Schalten Sie die Einheit aus,
bevor Sie mit den Installations- und Entf ernungsarbeiten beginnen.
• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse montiert
ist, sorgen Sie dafür, daß di e Temperat ur im Inner en des G estells
oder Gehäuses die für das Laufwerk vorgegebenen Grenzwerte
nicht übersteigt. Wenn Einheiten vertikal übereinander betestigt
werden, achten Sie be sonders auf den ober en Stapelbereich, da
dort di e Temperatur gew öhnlich am höchsten ist.
• Befolgen Sie die oben unter “Electrostatic Discharge Protection”
angegebenen Sicherheitsmaßnahmen.
• Nehmen Sie keine Platinen aus dem Laufwerk. Wenn eine Platine
defekt ist, muß das gesamte Laufwerk zur Re paratur e ingeschi ckt
werden. Die Herausnahme von Platinen durch andere Personen als
die für die werkseitige Reparatur zuständigen kann zu einer Bes-
Cheetah 18LP Installation Guide, Rev. C 7
chädigung der Komponenten und Erlöschen des Garantiea nspruchs
führen.
• Die vormontierte Kopf- und Festplatteneinheit (HDA) nicht aus dem
Laufwerkgehäuse nehmen! Falls die HDA beschädigt ist, sc hicken
Sie das gesamte Laufwerk zur Reparatur ein.
• Die HDA ist nicht vor Ort reparierbar und darf nicht auseinandergenomm en werden! Öffnen der versiegelten HDA durch andere Personen als die für die werkseitige Reparatur zuständigen hat eine
Beschädigu ng der Komponen ten und Er löschen des Garantieanspruch s zu r Folge.
Als Teilkomponente ist dieses Laufwerk für die Installation und den
Betrieb in Übereinstimmung mit UL 1950, EN60950, CAN\CSA
C22.2 950-M95 und VDE0 805 vorgesehen.
Seagate ist ständig bemüht, die Zulassungsfähigkeit von Seagate-
Produkten im Rahmen der gegenwär tig gelt enden St andard s zu
gewährleisten. Zu den typischen Anwendungen dieser Festplattenwerke zählen Systemeinbau durch den Kunden und die Konstruktion
von Untersystemen. Sicherheitsbehörden 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 aufsichtsbehördliche r Vorschriften in ihren Endprodu kten und - fa lls gesetzlich vorgeschrie ben
- für die Zulassung zu schaffen. Eine Grundvoraussetzung zur Ein-
haltung der Sic herheitsanfor derungen ist die Be reitstell ung eines
Überlastschutzes für die SELV-Versorgungsspannungen des Laufwerks.
Dieses Gerät ist eine B a ug r u pp e und unterlieg t a ls s olche ni ch t d en
Anforderungen der FCC oder ähnlicher nationaler Behörden für
eigenständige Geräte. Technische Testergebniss e zu elektromagnetisch e Strah lung sin d für Design er von U ntersy stem en auf
Anfrage von der Seagate-Sicherheitsabteilung erhältlich.
8 Cheetah 18LP Installation Guid e, Rev. C
Regulatory agency compliance
Electromagnetic susceptibility
As a component assembly, the drive is not required to meet any
susceptibility performance requirements. It is the responsibili ty 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 system 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-Tic k Marking.
The drive was tested in a representative system for typical applications. The selected system represents the most popular characteristics for test platforms. The syste m con figurations i nclude:
• 486, P entium, and P owerPC 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 CTick Marking for their product.
Cheetah 18LP Installation Guide, Rev. C 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 Directive 89/336/EEC of 03 May 1989 as amended by Dir ective 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 Australia/New Zealand Standard AS/NZS3548 1995 and meets the
Electromagnetic Compatibility (EMC) Framework requirements
of Australia’s Spectrum Management Agency (SM A).
10 Cheetah 18LP Installat ion Guide, Re v. C
General description
Cheetah 18LP SCSI disc drives are high-speed, random-access
digital-data storage devices capable of operat ing in single-en ded
(SE) or low volt age different ial (LVD) modes.
This multimode capability allows you to use this drive in systems
that use the traditional SE technology or in LVD-capable systems.
Figure 1. Cheetah 18LP family drive (LW model shown)
This drive should be mounted in an enclosure designed for the
drive. This is often within the host system case or an external
enclosure designed to house one or more disc drives or other
devices. In either case, the disc drive must receive adequate
cooling (refer to “Providing adequate cooling”) and it must be
sufficientl y grounded and shielded from emissions. The Cheetah
18LP Product Manual (part number 83329400) contains guidelines f or a properly designed enclos ure.
Cheetah 18LP Installation Guide, Rev. C 11
Single-ended and low voltage differential modes
This drive incorporates two different transceivers to allow you to
use it in systems which use single-ended (SE) drivers and
receivers, or in low voltage differential (LVD) capable systems
which use LVD drivers and receivers.
The primary benefits of LVD technology
• Fast er transfer rates.
• Reduces power consumption.
• Increases allowable cable lengths.
• Improv es device connect ivity.
You can configure the drive to switch between SE and LVD
modes automatically or force it to operate in SE mode only. To
configure t his option, use the jum per illustrati on on page 24 (LW/
LWV models) or page 34 (LC/LCV models).
Note.
To operate at the Ultra2 or Ultra160 SCSI rates in LVD
mode, all devices on the same bus must be running in
LVD mode. If you add any single-ended device to a bus
that is operating in LVD mode, all devices drop back to
operating in single-ended mode. This eliminates the possibility o f r eaching Ultra2 or Ultra160 SCSI transfer rates.
Caution.
devices hav ing high voltage di fferent ial (HV D) interf ace
circui ts. T he c ircui ts are n ot comp ati ble an d dr ive d am-
age ma y occur.
Do not mix LVD drives on the same bus with
12 Cheetah 18LP Installat ion Guide, Re v. C
Data bus widths
These drives have a wide (16-bit) SCSI data bus. You can use
these drives on a non-wide (8-bit) data bus if you provide proper
termination to the upper eight data lines. This is often referred to
as providing “high-9 termin ati on” (the other bit is for parity).
The following table lists the maximum cable lengths and number
of devices using single-en ded and LVD I/O circuits.
T able 1. SE and LVD bus configurations
SCSI
driver
type
I/O tran sfer rate
(Mbytes/s)
Maximum
number of
devices on
bus
Maxi mum ca bl e
length allowed
SE 20 16 6 meters (19.7 ft.)
SE 40 4 3 mete rs (9 .8 ft.)
SE 40 8 1.5 mete rs (4.9 ft.)
LVD 80 and 160 16 12 meters (39.4 ft.)
Providing adeq uate cooling
The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperature allowed is 50°C.
The drive’s product manual (83329400) describes how to evalu-
ate the air-flow design. The evaluation consists of ensuring that
the case temperature of certain critical components remains
within acceptable limits during drive operation.
Figure 2 shows two design approaches with one or more fans
used to generate air flow. The air-flow patterns can be created
Cheetah 18LP Installation Guide, Rev. C 13
by the fans either pushing or drawing air. The overall flow pattern
can be directed from front to back, back to front, or side to side.
Kühlung des Sys tems
Die Gehäusekonstruktion muß eine aus rei ch en de Kühlung des Laufwerkes gew ährleisten. Die Umgebungstemperatur darf maximal
50°C betragen.
Die Produkthandbuch Cheetah 18LP (Dokument 83329400)
enthalten Anweisungen zur Beurteilung der Luftstromkonstruktion.
Die Beurteilung muß siche r st ellen, da ß s ic h di e G eh äusetemperatur
bestimmter kritischer Komponenten bei Laufwerkbetrieb innerhalb
zugelassener G renzen hält.
Abbildung 2 zeigt zwei Konstruktionsmöglichkeiten, bei denen ein
oder mehrere Lüfter den Luftstrom erzeugen. Der Luftstromverlauf
wird durch die Lüf ter gesteuer t, die entweder Luf t einblasen ode r
abziehen. Genere ll kann d er Lu ftstro m entwe der von vor ne na ch
hinten oder von hinten nach vorne verlaufen.
14 Cheetah 18LP Installat ion Guide, Re v. C
.
Above unit
Note. Air flows in the direction shown (back to front)
or in reverse direction (front to back)
Note. Air flows in the direction shown or
in reverse direction (side to side)
Figure 2. Suggested air flow
Abbildung 2. Empfohlener Luftst romve rla uf
Under unit
Above unit
Under unit
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