seagate ST318233LWV, ST39133LWV, ST318203LW, ST39103LW Installation Guide [en, de]

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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

Cheetah 18LP Installation Guide, Rev. C 15

Characteristics

ST318203
ST39103

Interface Ultra2 SCSI

1

ST318233
ST39133

Ultra160 SCSI

Capacity

Unform atted (Gb ytes)

Formatted (Gbytes)

21.6 (ST 318203)

2

10.8 (ST 39103)

18.2 (ST 318203)

9.10 (ST 39103)

21.6 (S T3 18 23 3)

10.8 (S T3 91 33 )

18.2 (S T3 18 23 3)

9.10 (ST39133)

Recording

Cylinders (us er )
Read/w rite data heads

Avg bytes/t ra ck

Access time

3

Average read (msec)
Average write (msec)

9,801
12 (ST318203)
6 (ST39103)
153,284–229,045

5.4

6.0

9,801
12 (ST318233)
6 (ST39133)
153,284–229,045

5.4

6.0

Disc rotation

RPM
Average latency (msec)

10,016

2.99

10,016

2.99

Synchronous data transfer rate

Maxi mu m instan tan eous
(Mbytes/sec)

40 (SE mode)
80 (LVD mode)

40 (SE mode)
160 (LVD mode)

Asynchronous data transfer
rate
Maximum instan taneous

10.0 10.0

(2 bytes wide) (Mbytes/sec)

Multi-segmented cache
(kbytes)

1. Also operates per SCSI-1/SCSI-2/SCSI-3 protocols.

2. The specified formatted capacities are calculated with the standard
OEM sector size (512 bytes per logical block) and sparing.

3. Includes on-board controller overhead.

1,024 (LW/LC)
4,096 (LWV/LCV)

4,096 (LWV/LCV)

1

16 Cheetah 18LP Installat ion Guide, Re v. C

Low voltage
Single-ended
(SE) mode
(amps)

1

DC pow er requirements (±5%)

+5 V+12 V +5 V+12 V

ST318203LW/LWV/LC/LCV

Maxi mu m star t cur r e n t
Maxi mu m op er a t in g cu r rent
Av erage idle curre nt

0.79

0.79

0.69

1.53

1.13

0.6

ST39103LW/LWV/LC/LCV

Maxi mu m star t cur r e n t
Maxi mu m op er a t in g cu r rent
Av erage idle curre nt

0.81

0.80

0.71

1.4

0.84

0.34

ST318233LWV/LCV

Maxi mu m star t cur r e n t
Maxi mu m op er a t in g cu r rent
Av erage idle curre nt

0.82

0.83

0.8

1.61

1.13

0.65

ST39133LWV/LCV

Maxi mu m star t cur r e n t
Maxi mu m op er a t in g cu r rent
Av erage idle curre nt

1. For more detailed power information, refer to the Cheetah 18LP Product
Manual, publication number 83329400.

0.81

0.83

0.8

1.71

0.98

0.45

differential
(LVD) mode
(amps)

0.81

0.84

0.71

0.82

0.85

0.72

0.90

0.93

0.88

0.89

0.93

0.88

1.53

1.13

0.6

1.4

0.84

0.34

1.61

1.13

0.65

1.71

0.98

0.45

Cheetah 18LP Installation Guide, Rev. C 17

How to install the drive

This inst all a tion guide provides s tep-by-step instructions to make
your driv e installation as easy as possible. F ollow the installation
steps listed for your driv e m odel as listed below:

LW/LWV models (use the installation steps beginning below).
LC/LCV models (use the installation steps beginning on page

30).

LW and LWV model installa t ion

1. Set the SCSI ID on the drive.

Determine which SCSI IDs are already being used in the
system and then assign this disc drive a SCSI ID that isn’t
already being used. Use the J6 connector located on the
front of the drive to set the SCSI ID (see Figure 3).

• This drive is SC AM (SCS I Configured Auto Mag­ically) compliant. If you are installing this drive in a

SCAM compliant system, you can skip this step
becaus e the s ystem auto matica lly assign s the d rive SC SI
ID.

• The host system’s SCSI controller usually uses SCSI ID 7
so this SC SI ID is not usu ally available for disc drives or
other devices.

• Most LW and LWV drives are factory set with the SCSI ID
set at 0. I f this is the on ly SCSI dr ive in your sy stem and
there are no other SCSI devices on the daisychain, you can
leave this drive’s SCSI ID set to 0 and proceed to the next
step. A device is any hardware other than an inline termina­tor that is connected to the SCSI cable.

18 Cheetah 18LP Installat ion Guide, Re v. C

Drive
Front

Jumper Plug
(enlarged to
show detail)

Pin 1

J6

SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15

Figure 3. Setting the SCSI ID

Cheetah 18LP Installation Guide, Rev. C 19

2. Configure termination.

If you are instal lin g the drive in a system that has other SCSI
devices installed, terminate only the end devices on the
SCSI bus.

Figure 4 shows the three most common termination configu­rations. LW and LWV model drives do not have internal ter­minators or any other way of adding internal termination on
the drive. You must provide external termination to these
drives when termination is required. This is normally done
by adding an in-line terminator on the cable. See Figure 9
on page 27 for an illustration showing a system configura­tion that uses an inline terminator.

• Use active (ANSI SCSI-2 Alternative 2) single­ended t erminator s when terminat ing a bus ope r­ating in single-ended mode.

• Use SPI-2-compliant active low voltage differential termina­tors wh en termina ting a SCSI U l t ra2 or Ul t ra1 60 bus oper­ating in LVD mode.

• Some controllers prefer to remain terminated even if they
are in the middle of the chain. Also, some controllers treat
the internal and external chains as separate logical buses.
This means you may need to terminate both the first and
last devices on both logical buses to achieve proper termi­nation. If necessary, refer to your system or controller doc­umentation to see how this is ha ndled in your par ticular
system.

20 Cheetah 18LP Installat ion Guide, Re v. C

Internal SCSI cable

Internal

SCSI device

Internal

SCSI drive

Internal SCSI cable

Internal

SCSI device

Internal SCSI cable

Internal

SCSI device

Terminate

SCSI device

Terminate

Controller

Internal

Terminate

Controller

Controller

External

SCSI
cable

External

SCSI device

External

SCSI device

Figure 4. SCSI bus termination

Cheetah 18LP Installation Guide, Rev. C 21

3. Configure terminati on power.

Terminators have to get power from some source. The
default configuration results in the drive not suppling termi­nation power to the bus. You should normally leave this
drive set at this default unless your host system requires
that the drive supply termination pow er to the bus.

To configure this drive to supply termination power to the
bus, place a jumper on J2 pins 1 and 2 as shown in the fig­ure below.

Pin 1
Pin 2

R

R

E

EST

D

S

P
Term. Power to SCSI Bus
Host adapter or other device provides

term power to external terminator

J2 Jumper

(enlarged to

show detail)

J6

Drive
Front

J2

SEDSMEWPP

J2

Figure 5. Setting terminator power jumpers

22 Cheetah 18LP Installat ion Guide, Re v. C

4. Connect the drive activi ty remote LED (optional)

This drive provides connections for a remote drive activity
LED. This step is optional because the drive will work fine
without an LED connected, but many people find this to be
helpful to determine when the drive is actively reading or
writing data.

Most host systems provide this LED which is a small “bulb”
(actually a light-emitting diode) located on the host’s front
panel. Simply locate this LED and connect the attached pair
of wires to the pins on the driv e as shown in Figure 6 below.

Drive
Front

Jumper Plug

(enlarged to
show detail)

Pin 1

CATH

Reserved
Activity LED

Reserved
The shaded pins are shipped
with a cover installed. Do not
install jumpers on these pins.
Retain the cover unless you
install a 20-pin plug.

Note: On some LEDs the flat
side of indicator is cathode.

J6

Figure 6. Drive Active LED indicator connections

Cheetah 18LP Installation Guide, Rev. C 23

5. Check the other available jumper settings (optional)

This drive provides several features for unique configura­tions. You will not normally need to change from the default
settings for normal operation. See Figure 7 on page 24.

Single-ended mode option

You can force the drive to operate only in SE mode by
installing a jumper on J2 pins 15 and 16. The default is to
allow the drive to automatically detect and use SE or LVD
mode. See page 11 for a description of these two modes.

Delay Motor Start and Motor Start opt ions

You can control when the drive’s motor starts spinning the
media using these two jumper positions (J2 pins 11 and 12
and J2 pins 13 and 14). You can configure the driv e to delay
spinning up until a certain number of seco nds elapse or unt il
the drive receives a Start Unit command from the host sys­tem. The default settings are with both off so that the drive
begins spinni ng up as soon as it receives power.

Write Prot e c t option

You can install a jumper connecting J2 pins 9 and 10 to pre­vent anyone from writing data to this disc drive (users can
still read dat a from the drive). This jumper is normall y left off
to allow users to write dat a to th e driv e.

Pari ty Check option

You can disable parity checking by installing a jumpers on
J2 pins 7 and 8. Most systems prefer that parity checking
remain enabled. Refer to your host adapter or system docu­mentation to determine whether your host adapter supports
parity check ing.

24 Cheetah 18LP Installat ion Guide, Re v. C

J2

Reserved
Single-Ended Mode option

Use single-ended or low voltage differential mode.
Force the drive to operate only in single-ended mode.

Delay Motor Start option
(valid only if the Enable Motor Start jumper is not connected)

Disable the Delay Motor Start option (default).
Motor start delay equal to the SCSI ID multiplied by 12 seconds.

For example, if the SCSI ID = 2, the drive starts in 24 seconds.
Motor Start option

Disable motor start (default). The drive starts according to the
Delay Motor Start option.

Enable motor start. The drive waits for the Start Unit command
from the host before starting the spindle motor.

Write Protect option
Write protect = Off (enables writing – default).
Write protect = On (disables writing).

Parity Check option
Enable parity check of SCSI bus (default).
Disable parity check.

J6

Drive

J2 Jumper

(enlarged to

show detail)

Front

SEDSMEWPP

J2

Pin 1
Pin 2

R

R

E

EST

D

S

P

Figure 7. Additional jumper options

Cheetah 18LP Installation Guide, Rev. C 25

6. Mount the drive in the host system and connect
cabling.

a. Mount the drive to the host system’s chassis using four

6-32 UNC screws. Two mounting holes are in each side
of the drive and there are four mounting holes in the
bottom of the drive. Do not over-tighten or force the
screw if it does not seem to screw in easil y. The dimen­sions of the drive are provided in Figure 10.

b. Connect the SCSI cable into the drive’s SCSI connecto r

as illustrated in Figure 8 on page 26. Take care not to
stretch or crimp this cable, and do not block the sys­tem’s air flow with the cab le . Figure 9 on page 27 sho ws
an example of how to connect multiple drives on the
same bus.

c. Connect the DC power cable to the drive as illustrated

in Figure 8.

d. Replace the host sys tem’s cover.

• Do not to uc h the conn ec t o r pins or any compo ­nents on the circuit board.

• Observe static-discharge precautions.

• Always handle the drive by the frame only.

• The drive may be mounted in any orientation; however, you

must ensure that the drive receives adequate air flow for
cooling.

7. Format the drive.

Follow the instruction s on page 37 to format the drive.

26 Cheetah 18LP Installat ion Guide, Re v. C

Power

Cable

Figure 8. Connecting cables to the drive

Cheetah 18LP Installation Guide, Rev. C 27

“LW” Model

Drive

Note:

Do not mix
“LW” and “WD”
model drives
on the daisy
chain.

SCSI ID 1

[2]

SCSI ID 0

Inline

Terminator

2 through X
SCSI devices [1]

Pin 1

(check your

adapter for Pin 1 location)

SCSI ID 7

Terminated

Host Adapter

PCB

[1] “X” means up to 15 devices on the SCSI bus.
[2] External t e rm inator. Used on ly on end dr i ve. Us e only SPI -2- c o mp li -

ant active LVD terminators on SCSI Ultra2 and Ultra160 buses.

Figure 9. Multiple-drive connection to host adapter

28 Cheetah 18LP Installat ion Guide, Re v. C

-Z-T//

S

HL

A

-Z-

M

-X-

U

P

[1]

G

F

[1]

B

R

DE

C

-X-

K

-Z-

J

Notes:

Mounting holes are 6-32 UNC 2B, three

[1]

on each side and four on the bottom.
Max screw penetration into side of drive
is 0.15 in. (3.81 mm). Max screw
tightening torque is 6.0 in-lb (3.32 nm)
with minimum full thread engagement of

0.12 in. (3.05 mm).

Dimension Table

Inches

A

1.028

max

B

5.787

max

C

4.000

± .010

D

3.750

± .010

E

.125

± .010

F

1.750

± .010

G

1.625

± .020

H

1.122

± .020

J

4.000

± .010

K

.250

± .010

L

1.638

± .010

M

.181

± .020

P

1.625

± .020

R

.265

± .010

S

.315

± .040

T

.015

max

U

.015

max

Millimeters

26.10

max

147.00

max

101.60

± .25

92.25

± .25

3.18

± .25

44.45

± .25

41.28

± .50

28.50

± .50

101.60

± .25

6.35

± .25

41.61

± .25

4.60

41.28

6.73

7.00

0.38

0.38

± .50
± .50

± .25
± .10

max
max

Figure 10. Mounting configuration dimensions

Cheetah 18LP Installation Guide, Rev. C 29

Additional connector on LW and LWV model drives

LW and LWV model drives have a connector located between
the SCSI I/O connector and the DC power connector to allow
you to set the SCSI ID and connect LEDs from the back of the
drive. You are not requ ir ed to use thi s connector, but it’s available
if you want to use it. Refer to Figure 11 for pin assignments.

68 Pin

SCSI I/O Connector

J1

Pin 1

J5/J1A [2][4]

Pin 1

1P2P3P4P

Pin 12

J1A Pin 1

SCSI Address A0
SCSI Address A1
SCSI Address A2
SCSI Address A3
No connection
+5V
Fault LED*
Vendor Unique*
Reserved
Activity LED*
Ground

These pins are driven low for

*

250 ms after PWR ON or
RESET to allow jumper
selectable SCSI ID as shown
to the right.

J1-DC Power

SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15

Figure 11. Alternate SCSI ID select and LED connection

30 Cheetah 18LP Installat ion Guide, Re v. C

LC and LCV model installation

1. Set the SCSI ID on the drive.

Determine which SCSI IDs are already being used in the
system and then assign the disc drive a SCSI ID that isn’t
already being used. Use the J6 connector located on the
front of the drive to set the SCSI ID (see Figure 12).

• This drive is SCAM (SCSI Configured Auto
Magically) compliant. If you are installing this
drive in a S CA M compl ia nt sy stem , y o u can sk ip

this step because the system automatically assigns the
drive SC SI ID.

• The ho st sy stem’s SCS I contro ller u sually uses S CSI ID 7
so th is SCSI ID is not usu ally available for disc dr ives or
other devices.

• Most LC an d L CV mo del d riv e s a re factory set wit h th e SCSI
ID set at 0. If this is the only SCSI drive in your system and
there are no other SCSI devices on the daisychain, you can
leave this drive’s SCSI ID set to 0 and proceed to the next
step. A device is any hardware other than an inline termina­tor that is connected to the SCSI cable.

Cheetah 18LP Installation Guide, Rev. C 31

Drive

Front

Jumper Plug

(enlarged to
show detail)

Pin 1

J6

SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15

Figure 12. Setting the SCSI ID

32 Cheetah 18LP Installat ion Guide, Re v. C

2. Configure termination.

LC and LCV model drives are designed for installation in
host systems that have a backplane with single connector
attachment (SCA) connections. Termination is normally pro­vided on this backplane. Check your host system documen­tation for det a ils.

• You can use this drive in host syst ems that do
not have a backplane with SCA connectors by
using a SCA to wide SCSI-2 adapter. These

adapter s se pa rat e the in te rface lines from the pow e r lin es . If
you use such an adapter, proceed with step 2 of the installa­tion inst r u ctions provided for LW and LWV model drives .

Note. Host systems designed to use LC and LCV drives nor-

mally provide termination power from the host adapter or
other sourc e. LC and LCV model driv es cannot be config­ured to provide termination power to the bus.

Cheetah 18LP Installation Guide, Rev. C 33

3. Check the other available jumper settings (optional)

This drive provides several features for unique configura­tions. You will not normally need to change from the default
settings for normal operation. See Figure 13 on page 34.

Single-ended mode option

You can force the drive to operate only in SE mode by
installing a jumper on J2 pins 15 and 16. The default is to
allow the drive to automatically detect and use SE or LVD
mode. See page 11 for a description of these two modes.

Delay Motor Start and Motor Start opt ions

You can control when the drive’s motor starts spinning the
media using these two jumper positions (J2 pins 11 and 12
and J2 pins 13 and 14). You can configure the driv e to delay
spinning up until a certain number of seco nds elapse or unt il
the drive receives a Start Unit command from the host sys­tem. The default settings are with both off so that the drive
begins spinni ng up as soon as it receives power.

Write Prot e c t option

You can install a jumper connecting J2 pins 9 and 10 to pre­vent anyone from writing data to this disc drive (users can
still read dat a from the drive). This jumper is normall y left off
to allow users to write dat a to th e driv e.

Pari ty Check option

You can disable parity checking by installing a jumpers on
J2 pins 7 and 8. Most systems prefer that parity checking
remain enabled. Refer to your host adapter or system docu­mentation to determine whether your host adapter supports
parity check ing.

34 Cheetah 18LP Installat ion Guide, Re v. C

Reserved
Single-Ended Mode option

Use single-ended or low voltage differential mode.
Force the drive to operate only in single-ended mode.

Delay Motor Start option
(valid only if the Enable Motor Start jumper is not connected)

Disable the Delay Motor Start option (default).
Motor start delay equal to the SCSI ID multiplied by 12 seconds.

For example, if the SCSI ID = 2, the drive starts in 24 seconds.
Motor Start option

Disable motor start (default). The drive starts according to the
Delay Motor Start option.

Enable motor start. The drive waits for the Start Unit command
from the host before starting the spindle motor.

Write Protect option
Write protect = Off (enables writing – default).
Write protect = On (disables writing).

Parity Check option
Enable parity check of SCSI bus (default).
Disable parity check.

J6

Drive

J2 Jumper

(enlarged to

show detail)

Front

Figure 13. Additional jumper options

J2

SEDSMEWPP

J2

Pin 1
Pin 2

R

R

E

EST

D

S

P

Cheetah 18LP Installation Guide, Rev. C 35

4. Mount the drive in the host system.

To mount the drive, plug it into the system’s single connector
attachment (SCA) position on the system’s backplane. The
SCA connector on the drive contains interface and power
functions, so it does not require a separate power connec­tor. The dimensions of the drive are provided in Fi gure 15.

Some host systems require that you first mount the drive to
a sliding tray or courier before inserting it into the system.

This drive model plugs directly into a backplane connector
and therefore does not use cables.

80-pin

SCSI I/O

Connector

Pin 1

J2

J6

Figure 14. 80-pin I/O connection to drive

36 Cheetah 18LP Installat ion Guide, Re v. C

-Z-T//

S

HL

A

-Z-

M

-X-

U

P

[1]

G

F

DE

[1]

B

R

-Z- -X-N

C

-X-

K

-Z-

J

Notes:

Mounting holes are 6-32 UNC 2B, three

[1]

on each side and four on the bottom.
Max screw penetration into side of drive
is 0.15 in. (3.81 mm). Max screw
tightening torque is 6.0 in-lb (3.32 nm)
with minimum full thread engagement of

0.12 in. (3.05 mm).

Dimension Table

Inches

A

1.028

max

B

5.787

max

C

4.000

± .010

D

3.750

± .010

E

.125

± .010

F

1.750

± .010

G

1.625

± .020

H

1.122

± .020

J

4.000

± .010

K

.250

± .010

L

1.638

± .010

M

.181

± .020

N

.040

max

P

1.625

± .020

R

2.618

± .010

S

.276

± .040

T

.015

max

U

.015

max

Figure 15. Mounting configuration dimensions

Millimeters

26.10

147.00

101.60

92.25

3.18

44.45

41.28

28.50

101.60

6.35

41.61

4.60

1.20

41.28

66.50

7.00

0.38

0.38

max
max
± .25

± .25

± .25

± .25
± .50
± .50
± .25
± .25
± .25
± .50

max

± .50
± .25
± 1.02

max
max

Cheetah 18LP Installation Guide, Rev. C 37

5. Format the drive.

Caution.

data. Be sure that you understand this principle

before formatting any hard disc drive. It is not nec­essar y to format a drive that pr eviously has been us ed to
store da ta unless you r intention i s to erase all user data.
Seagate is not responsible for lost user data.

Formatting a drive erases all user

Important information about formatti ng the drive

• The drive has been low level formatted at the factory.
You do not need to perform another low level for mat on
this drive unless you decide to perform cer tain diagnos­tics through the host adapter.

• If you do decide to perform a low level format, do not
abort the f ormat as this is l ikely to m ake the drive inoper ­able. A low level format will typically take less than 30
minutes.

• Protect against power failure or other power interrup­tions during the format.

Cheetah 18LP disc drives are designed to operate with a
variety of operating systems. Some brief instructions are
provided below for DOS, Windows 3.1, Windows 95, Win­dows 98, and Macintosh systems. For more detailed instruc­tions, or if your operating system is not covered by these
instructions, please refer to your operating system or drive
utility documentation.

38 Cheetah 18LP Installat ion Guide, Re v. C

Note. Hardware platform, operating system, and host

adapter vari ations can limit access to the full capac­ity of this and other high capacity drives. Refer to
your system, host adapter, or drive utility do c um e n­tation for detailed instructions.

DOS, Windows 3.1, Windows 95, and Windows 98

System p reparation

a. Turn your computer on. As your computer starts up,

watch the screen for a message describing how to run
the system setup program (sometimes called BIOS or
CMOS setup). This is usually done by pressing a spe­cial key, such as

DELETE, ESC

, or F1 during startup.
See your comp uter manual for details. P ress the appro­priate key to run the system setup program.

b. Set the drive type in your BIOS or CMOS setup to

“Zero,” None,” or “No hard drive installed” and then
sav e and exit from your setup program.

Drive partitioning

Partitioning a hard drive divides it into sections (partitions)
that act as separate logical drives (labeled C, D, E, etc.). To
partition your new drive:

a. Insert a bootable DOS diskette into your diskette drive

and restart your computer.

b. Insert a DOS program diskette that contains the

fdisk.exe and format.com programs into your diskette
drive. At the

prompt, type fdisk and press

A:

ENTER

.

c. If you have two hard drives installed, the fdisk menu

displays five options. Option five allows you to select

Cheetah 18LP Installation Guide, Rev. C 39

the drive y ou want to partition . Make sure that your new
drive is selected. If you accidently repartition your old
hard drive , you will erase all dat a on the dri ve.

d. Press

drive” and then press the

e. Press

and then press the

to select “Create DOS partition or logical DOS

1

key .

ENTER

again to select “Create primary DOS partition”

1

key. Create your first drive

ENTER

partition.
If you are creating a partition that will be used to boot
your computer (drive C:), make sure that the partition is
marked active.

f. Create an extended partition and additional logical

drives, if necess ary, until all the space on your ne w hard
drive has been partioned.

g. When the partitioning is complete, fdisk reboots your

computer.

Drive formatting

a. At the A: prompt, type

your new partiti on. If this is your boot drive, type

x: /s

. Make sure you use the correct drive letter. If you

format x

where x is the le tter of

format

format a drive that already contains data, you will erase
all data on the drive.

b. Repeat this process for all the new partitions you have

created.

After you format your new drive, it is ready to use. You’re
done!

40 Cheetah 18LP Installat ion Guide, Re v. C

Macintosh

Use a th ir d -p a rty dr ive u t ility to in itialize th e d r ive a n d follo w
the instructions provided with the utility. Note: versions of
Apple Drive Setup prior to version 1.3.1 do not recognize
non-Apple drives.

Cheetah 18LP Installation Guide, Rev. C 41

Seagate Technology support services

Online Se r vices

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.html or [email protected]

Tape: http://www.seagate.com/support/email/

email_tape_presales.html or
[email protected]

Technical Support:
Disc: http://www.seagate.com/support/email/

email_disc_support.html or [email protected]

Tape: http://www.seagate.com/support/email/

email_tape_support.html or [email protected]

SeaBOARD

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).

Automated S er vices

SeaFONE® (1-800-SEAGATE)

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

®

is a computer bulletin board system that contains

is Seagate's toll-free number (1-

42 Cheetah 18LP Installat ion Guide, Re v. C
tips and specifications for disc drives and tape drives 24 hours

daily. International callers can reach this service by dialing +1­405-936-1234.

SeaFAX

touch-tone phone, you can obtain technical support information
by retu rn FAX 24 hours daily. This service is available worldwi de.

®

is Seagate's automated FAX delivery system. Using a

Presales Support

Presales Support

Our Presales Support staff can help you determine which
Seagate products are best suited for your specific application or
computer sys tem. Disc: 1-877-271-3285; Tape: 1-800-626-6637.

Onli ne Tape Purchases

US customers can purchase Seagate data cartridges, tape sup­plies, accessories and select Seagate tape drive products 24
hours daily at http://buytape.seagate.com.

T e c hnical Support

If you need help 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 additi onal 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

Cheetah 18LP Installation Guide, Rev. C 43
specialist from 8:00 A.M. to 12:15 P.M. and 1:30 P.M. to 6:00

P.M. (central time) Monday thr ough Friday.

Customer Service (C SO)

Warranty Service

Seagate offer s worldwide customer support for Seagate drives.
Seagate direct OE M , Di stribution and Sys tem Integrator custom­ers should contact their Seagate service center representative
for warranty information. Other customers should contact their
place of purchase.

Authorized Service Centers

If you l ive outside the US, you can contact an Authorized Servi ce
Center for service.

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 Suppor t (Se aFONE)

1-800-SEAGATE or [phone] (for specific product
phone number)

FAX: Disc: [phone]; Tape: [phone]

SeaFAX 1-800-SEAGATE
SeaTDD [phone]
SeaBOARD Disc: [phone]; Tape: [phone]

44 Cheetah 18LP Installat ion Guide, Re v. C

Warranty Service

USA 1-800-468-3472 FAX: [phone]
Mexico an d
Latin America [phone] FAX: [phone]

Canada

Memofix

1

[phone] FAX: [phone]
or 1-800-636-6349 http://www.memofix.com

1

Adtech

[phone] FAX: [phone]
or 1-800-624-9857 http://www.adt ech1.com

Brazil

MA Informatica [phone] FAX: [phone]

e-mail: sgt_cs [email protected]

European Support Services

For European customer support, dial the toll-free number for
your specific country for presales support, technical support,
SeaFAX and warranty service.

If your country is not listed here, dial our European call center at
[phone] from 8:30
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
Fr ance 0 800-90 90 52

A.M

. to 5:00 P.M. (European central

1

Authorized Service Centers

Cheetah 18LP Installation Guide, Rev. C 45
Germany 0 800- 182 6831

Ireland 1 800-55 21 22
Italy 800-790695
Netherlands 0 800-732 4283
Norwa y 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 Service [phone]

Africa/Middle East Support Services

For presales, technical support, warranty service and FAX ser­vices in Af rica and the Middle Eas t, dial our Euro pean call center
at [phone] from 8:30 a.m. to 5:00 p.m. (European cen­tral 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 Suppor t

Australia [phone] FAX: [phone]
Hong Kong [phone] FAX: [phone]

46 Cheetah 18LP Installat ion Guide, Re v. C
Japan — F AX: [phone]

Singapore [phone] FAX: [phone]
Taiwan [phone] FAX: [phone]

SeaFAX

Australia [phone]

Warranty Service

Japan [phone] FAX: [phone]
Asia/Pacific and [phone] FAX: [phone]

Australia

Seagate Technology, Inc.
920 Disc Drive, Scotts Valle y, CA 95066-4544, USA

Publication Number: 83329410, Rev. C, Printed in USA