Seagate Computer Drive ST136403LW LC User Guide

Cheetah 36  
Disc Drive  
ST136403LW/LC  
Installation Guide  
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Cheetah 36 Installation Guide, Rev. A  
1
Preface  
This manual contains handling information, support services,  
performance specifications, and installation information for  
Seagate® Cheetah 36 SCSI disc drives.  
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 cooling requirements.  
Additional information is available in the Cheetah 36 Product  
Manual (part number 83329440). Contact your Seagate sales  
representative if you need to order this publication.  
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2
Cheetah 36 Installation Guide, Rev. A  
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. Removal of circuit boards by personnel not  
performing 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  
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Cheetah 36 Installation Guide, Rev. A  
3
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.  
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-test-  
ing the drive to ensure proper cooling of drive compo-  
nents.  
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-  
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4
Cheetah 36 Installation Guide, Rev. A  
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 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 when the drive  
is mounted in an equipment rack or cabinet. When units are  
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 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. If the sealed HDA is opened by personnel not performing  
depot repair, this will damage components and void the  
warranty.  
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Cheetah 36 Installation Guide, Rev. A  
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 applica-  
tions of these disc drives include customer packaging and sub-  
system 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 overcur-  
rent protection on drive SELV supply voltages.  
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  
Beim Testen des Laufwerks auf dem Prüftisch ist Fremd-  
Vorsicht.  
belüftung vorzusehen, um eine ausreichende Kühlung der Lauf-  
werkkomponenten sicherzustellen.  
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 sorg-  
fältig durchzulesen und zu beachten, um das Risiko von Verletzun-  
gen auf ein Mindestmaß zu beschränken oder ganz zu vermeiden.  
Die Warnhinweise machen auf Situationen oder Praktiken aufmerk-  
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6
Cheetah 36 Installation Guide, Rev. A  
sam, 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 entsprech-  
end zu beraten. Aus diesem Grund haben wir auf eine derartige  
umfassende Beurteilung verzichtet. Falls Sie ein hier nicht beschrie-  
benes Verfahren oder Werkzeug verwenden, stellen Sie zuerst  
sicher, daß das gewählte Verfahren weder Ihre persönliche Sicher-  
heit noch die Leistung der Einheit gefährdet.  
Beachten Sie in jedem Fall die folgenden Warn-und Vorsichtshin-  
weise:  
• Beachten Sie alle Warn- und Vorsichtshinweise in diesem Hand-  
buch.  
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 Fehler-  
diagnose besonders vorsichtig vor. Schalten Sie die Einheit aus,  
bevor Sie mit den Installations-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 Protection”  
angegebenen Sicherheitsmaßnahmen.  
• Nehmen Sie keine Platinen aus dem Laufwerk. Wenn eine Platine  
defekt ist, muß das gesamte Laufwerk zur Reparatur eingeschickt  
werden. Die Herausnahme von Platinen durch andere Personen als  
die für die werkseitige Reparatur zuständigen kann zu einer Bes-  
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Cheetah 36 Installation Guide, Rev. A  
7
chädigung 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 auseinander-  
genommen werden! Öffnen der versiegelten HDA durch andere Per-  
sonen als die für die werkseitige Reparatur zuständigen hat eine  
Beschädigung der Komponenten und Erlöschen des Garantieans-  
pruchs zur 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 VDE0805 vorgesehen.  
Seagate ist ständig bemüht, die Zulassungsfähigkeit von Seagate-  
Produkten im Rahmen der gegenwärtig geltenden Standards zu  
gewährleisten. Zu den typischen Anwendungen dieser Festplatten-  
werke 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 aufsichtsbehördlicher Vor-  
schriften in ihren Endprodukten und - falls gesetzlich vorgeschrieben  
- für die Zulassung zu schaffen. Eine Grundvoraussetzung zur Ein-  
haltung der Sicherheitsanforderungen ist die Bereitstellung eines  
Überlastschutzes für die SELV-Versorgungsspannungen des Lauf-  
werks.  
Dieses Gerät ist eine Baugruppe und unterliegt als solche nicht den  
Anforderungen der FCC oder ähnlicher nationaler Behörden für  
eigenständige Geräte. Technische Testergebnisse zu elektromag-  
netische Strahlung sind für Designer von Untersystemen auf  
Anfrage von der Seagate-Sicherheitsabteilung erhältlich.  
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8
Cheetah 36 Installation Guide, Rev. A  
Regulatory agency compliance  
Electromagnetic susceptibility  
As a component assembly, the drive is not required to meet any  
susceptibility performance requirements. It is the responsibility of  
those integrating the drive within their systems to perform those  
tests required and design their system to ensure that equipment  
operating in the same system as the drive or external to the sys-  
tem does not adversely affect the performance of the drive. See  
DC power requirements on page 16.  
Electromagnetic compliance  
Seagate uses an independent laboratory to confirm compliance  
to the directives/standard(s) for CE Marking and C-Tick Marking.  
The drive was tested in a representative system for typical appli-  
cations. The selected system represents the most popular char-  
acteristics for test platforms. The system configurations include:  
• 486, Pentium, and PowerPC microprocessors  
• 3.5-inch floppy disc drive  
• Keyboard  
• Monitor/display  
• Printer  
• External modem  
• Mouse  
Although the test system with this Seagate model complies to  
the directives/standard(s), we cannot guarantee that all systems  
will comply. The computer manufacturer or system integrator  
shall confirm EMC compliance and provide CE Marking and C-  
Tick Marking for their product.  
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Cheetah 36 Installation Guide, Rev. A  
9
Electromagnetic compliance for the European Union  
If this model has the CE Marking it complies with the European  
Union requirements of the Electromagnetic Compatibility Direc-  
tive 89/336/EEC of 03 May 1989 as amended by Directive 92/31/  
EEC of 28 April 1992 and Directive 93/68/EEC of 22 July 1993.  
Australian C-Tick  
If this model has the C-Tick Marking it complies with the Austra-  
lia/New Zealand Standard AS/NZS3548 1995 and meets the  
Electromagnetic Compatibility (EMC) Framework requirements  
of Australia’s Spectrum Management Agency (SMA).  
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10  
Cheetah 36 Installation Guide, Rev. A  
General description  
Cheetah 36 SCSI disc drives are high-speed, random-access  
digital-data storage devices capable of operating in single-ended  
(SE) or low voltage differential (LVD) modes.  
This multimode capability allows you to use this drive in systems  
that use the traditional SE technology or in LVD-capable sys-  
tems.  
Figure 1. Cheetah 36 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  
sufficiently grounded and shielded from emissions. The Cheetah  
36 Product Manual (part number 83329440) contains guidelines  
for a properly designed enclosure.  
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Cheetah 36 Installation Guide, Rev. A  
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  
• Faster transfer rates.  
• Reduces power consumption.  
• Increases allowable cable lengths.  
• Improves device connectivity.  
You can configure the drive to switch between SE and LVD  
modes automatically or force it to operate in SE mode only. To  
configure this option, use the jumper illustration on page 24 (LW  
models) or page 34 (LC models).  
Note.  
To operate at the Ultra2 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 operat-  
ing in LVD mode, all devices drop back to operating in  
single-ended mode. This eliminates the possibility of  
reaching Ultra2 SCSI transfer rates.  
Caution. Do not mix LVD drives on the same bus with  
devices having high voltage differential (HVD) interface  
circuits. The circuits are not compatible and drive dam-  
age may occur.  
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12  
Cheetah 36 Installation Guide, Rev. A  
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 termination” (the other bit is for parity).  
The following table lists the maximum cable lengths and number  
of devices using single-ended and LVD I/O circuits.  
Table 1.  
SE and LVD bus configurations  
Maximum  
number of  
devices on  
bus  
SCSI  
driver  
type  
I/O transfer rate  
(Mbytes/s)  
Maximum cable  
length allowed  
SE  
SE  
SE  
LVD  
20  
40  
40  
80  
16  
4
6 meters (19.7 ft.)  
3 meters (9.8 ft.)  
1.5 meters (4.9 ft.)  
12 meters (39.4 ft.)  
8
16  
Providing adequate cooling  
The enclosure design must ensure adequate cooling for the  
drive. The maximum ambient temperature allowed is 50°C.  
The drive’s product manual (83329440) 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  
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Cheetah 36 Installation Guide, Rev. A  
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 Systems  
Die Gehäusekonstruktion muß eine ausreichende Kühlung des Lauf-  
werkes gewährleisten. Die Umgebungstemperatur darf maximal  
50 C betragen.  
°
Die Produkthandbuch Cheetah 36 (Dokument 83329440) enthalten  
Anweisungen zur Beurteilung der Luftstromkonstruktion. Die  
Beurteilung muß sicherstellen, daß sich die Gehäusetemperatur  
bestimmter kritischer Komponenten bei Laufwerkbetrieb innerhalb  
zugelassener Grenzen hält.  
Abbildung 2 zeigt zwei Konstruktionsmöglichkeiten, bei denen ein  
oder mehrere Lüfter den Luftstrom erzeugen. Der Luftstromverlauf  
wird durch die Lüfter gesteuert, die entweder Luft einblasen oder  
abziehen. Generell kann der Luftstrom entweder von vorne nach  
hinten oder von hinten nach vorne verlaufen.  
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14  
Cheetah 36 Installation Guide, Rev. A  
.
Above unit  
Under unit  
Note. Air flows in the direction shown (back to front)  
or in reverse direction (front to back)  
Above unit  
Under unit  
Note. Air flows in the direction shown or  
in reverse direction (side to side)  
Figure 2. Suggested air flow  
Abbildung 2. Empfohlener Luftstromverlauf  
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Cheetah 36 Installation Guide, Rev. A  
15  
Characteristics  
ST136403LW/LC  
Interface  
Ultra2 SCSI1  
Capacity  
Unformatted (Gbytes)  
Formatted (Gbytes)2  
43.2  
36.4  
Recording  
Cylinders (user)  
Read/write data heads  
Avg bytes/track  
9,801  
24  
153,284 -  
229,045  
Access time3  
Average read (msec)  
Average write (msec)  
6.15  
6.85  
Disc rotation  
RPM  
Average latency (msec)  
10,016  
2.99  
Synchronous data transfer rate  
Maximum instantaneous  
(Mbytes/sec)  
40 (SE mode)  
80 (LVD mode)  
Asynchronous data transfer rate  
Maximum instantaneous  
(2 bytes wide) (Mbytes/sec)  
10.0  
Multi-segmented cache (kbytes) 1,024 standard  
4,096 optional  
1.  
2.  
Also operates per SCSI-1/SCSI-2/SCSI-3 protocols.  
The specified formatted capacities are calculated with the standard OEM  
sector size (512 bytes per logical block) and sparing.  
Includes on-board controller overhead.  
3.  
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16  
Cheetah 36 Installation Guide, Rev. A  
Low voltage  
Single-ended (SE)  
mode  
differential  
(LVD) mode  
DC power requirements (±5%)1  
+5 V  
+12 V  
+5 V  
+12 V  
ST136403LW/LC  
Maximum start current  
Maximum operating current  
Average idle current  
0.83  
0.84  
0.75A  
2.3  
1.6  
0.99A  
0.85  
0.88  
0.77A  
2.3  
1.6  
0.99A  
1.  
For more detailed power information, refer to the Cheetah 36 Product  
Manual, publication number 83329440.  
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Cheetah 36 Installation Guide, Rev. A  
17  
How to install the drive  
This installation guide provides step-by-step instructions to make  
your drive installation as easy as possible. Follow the installation  
steps listed for your drive model as listed below:  
LW models (use the installation steps beginning below).  
LC models (use the installation steps beginning on page 30).  
LW model installation  
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 SCAM (SCSI Configured AutoMati-  
cally) compliant. If you are installing this drive in a  
SCAM compliant system, you can skip this step  
because the system automatically assigns the drive SCSI  
ID.  
• The host system’s SCSI controller usually uses SCSI ID 7  
so this SCSI ID is not usually available for disc drives or  
other devices.  
• Most ST136403LW drives are factory set with the 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 termina-  
tor that is connected to the SCSI cable.  
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18  
Cheetah 36 Installation Guide, Rev. A  
Drive  
Front  
Jumper Plug  
(enlarged to  
show detail)  
Pin 1  
J6  
SCSI ID = 0  
(default)  
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  
Note:  
[1] Do not remove  
cover from pins  
13 through 20  
(darkened area).  
SCSI ID = 10  
SCSI ID = 11  
SCSI ID = 12  
SCSI ID = 13  
SCSI ID = 14  
SCSI ID = 15  
Figure 3. Setting the SCSI ID on LW model drives  
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Cheetah 36 Installation Guide, Rev. A  
19  
2. Configure termination.  
If you are installing 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 configu-  
rations. LW 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) single-  
ended terminators when terminating a bus oper-  
ating in single-ended mode.  
• Use SPI-2-compliant active low voltage differential termina-  
tors when terminating a SCSI Ultra2 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 termi-  
nation. If necessary, refer to your system or controller doc-  
umentation to see how this is handled in your particular  
system.  
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20  
Cheetah 36 Installation Guide, Rev. A  
Internal SCSI cable  
Internal  
SCSI drive  
Controller  
Terminate  
Internal SCSI cable  
Internal  
Internal  
Controller  
SCSI device SCSI device  
Terminate  
Internal SCSI cable  
External  
SCSI  
cable  
Internal  
Internal  
SCSI device SCSI device  
External  
External  
Controller  
SCSI device SCSI device  
Terminate  
Figure 4. SCSI bus termination  
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Cheetah 36 Installation Guide, Rev. A  
21  
3. Configure termination power.  
Terminators have to get power from some source. The  
default configuration results in the drive not suppling termi-  
nation power to the bus. You should normally leave this  
drive set at this default unless your host system requires  
that the drive supply termination power 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 fig-  
ure below.  
Pin 1  
J2  
Pin 2  
R R  
S D MW P E E T  
E S E P D S S P  
Term. Power to SCSI Bus  
Host adapter or other device provides  
term power to external terminator  
J2 Jumper  
(enlarged to  
show detail)  
J2  
J6  
Drive  
Front  
Figure 5. Setting terminator power jumpers  
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22  
Cheetah 36 Installation Guide, Rev. A  
4. Connect the drive activity 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 drive as shown in Figure 6 below.  
Drive  
Front  
Jumper Plug  
(enlarged to  
show detail)  
Pin 1  
J6  
Reserved  
Activity LED  
Reserved  
CATH  
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.  
Figure 6. Drive Active LED indicator connections  
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Cheetah 36 Installation Guide, Rev. A  
23  
5. Check the other available jumper settings (optional)  
This drive provides several features for unique configura-  
tions. 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 options  
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 drive to delay  
spinning up until a certain number of seconds elapse or until  
the drive receives a Start Unit command from the host sys-  
tem. The default settings are with both off so that the drive  
begins spinning up as soon as it receives power.  
Write Protect option  
You can install a jumper connecting J2 pins 9 and 10 to pre-  
vent anyone from writing data to this disc drive (users can  
still read data from the drive). This jumper is normally left off  
to allow users to write data to the drive.  
Parity 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 docu-  
mentation to determine whether your host adapter supports  
parity checking.  
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24  
Cheetah 36 Installation Guide, Rev. A  
Pin 1  
J2  
Pin 2  
R R  
S D MW P E E  
T
E S E P D S S P  
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.  
J2  
J6  
Drive  
Front  
J2 Jumper  
(enlarged to  
show detail)  
Figure 7. Additional jumper options  
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Cheetah 36 Installation Guide, Rev. A  
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 easily. The dimen-  
sions of the drive are provided in Figure 10.  
b. Connect the SCSI cable into the drive’s SCSI connector  
as illustrated in Figure 8 on page 26. Take care not to  
stretch or crimp this cable, and do not block the sys-  
tem’s air flow with the cable. Figure 9 on page 27 shows  
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 system’s cover.  
• Do not touch the connector 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 instructions on page 37 to format the drive.  
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26  
Cheetah 36 Installation Guide, Rev. A  
Figure 8.  
Connecting cables to the drive  
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Cheetah 36 Installation Guide, Rev. A  
27  
“LW” Model  
Drive  
Note:  
Terminator  
Do not mix  
“LW” and “WD”  
model drives  
on the daisy  
chain.  
[2]  
2 through X  
SCSI devices [1]  
Pin 1  
SCSI ID 1  
(check your  
adapter for Pin 1 location)  
SCSI ID 7  
Terminated  
Host Adapter  
PCB  
SCSI ID 0  
[1] “X” means up to 15 devices on the SCSI bus.  
[2] External terminator. Used only on end “LW” drive. Use only SPI-2-  
compliant active LVD terminators on SCSI Ultra2 buses.  
Figure 9. Multiple-drive connection to host adapter  
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28  
Cheetah 36 Installation Guide, Rev. A  
K
//  
T
-Z-  
S
[1]  
-Z-  
H
L
J
B
R
Notes:  
Mounting holes are 6-32 UNC 2B, three  
[1]  
A
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).  
-Z-  
M
U
-X-  
P
Dimension Table  
Inches  
1.654 max  
5.787 max  
Millimeters  
[1]  
G
F
A
B
C
D
E
F
G
H
J
42.01 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  
41.60 ± .25  
4.60 ± .50  
4.000 ± .010  
3.750 ± .010  
.125 ± .010  
1.750 ± .010  
1.625 ± .020  
1.122 ± .020  
4.000 ± .010  
.250 ± .010  
1.638 ± .010  
.181 ± .020  
K
L
M
P
R
S
T
1.625 ± .020  
.265 ± .010  
.315 ± .040  
.015 max  
41.28 ± .50  
6.73 ± .25  
7.00 ± .10  
0.38 max  
0.38 max  
U
.015 max  
E
D
C
-X-  
Figure 10. Mounting configuration dimensions (LW model)  
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Cheetah 36 Installation Guide, Rev. A  
29  
Additional connector on LW model drives  
LW 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 required to use this 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  
4P  
3P 2P  
1P  
J1-DC Power  
Pin 12  
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  
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.  
Figure 11. Alternate SCSI ID select and LED connection  
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30  
Cheetah 36 Installation Guide, Rev. A  
LC 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 SCAM compliant system, you can skip  
this step because the system automatically assigns the  
drive SCSI ID.  
• The host system’s SCSI controller usually uses SCSI ID 7  
so this SCSI ID is not usually available for disc drives or  
other devices.  
• Most ST136403LC drives are factory set with the 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 termina-  
tor that is connected to the SCSI cable.  
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Cheetah 36 Installation Guide, Rev. A  
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  
(default)  
Note:  
[1] Do not remove  
cover from pins  
13 through 20  
(darkened area).  
Figure 12. Setting the SCSI ID on LC model drives  
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32  
Cheetah 36 Installation Guide, Rev. A  
2. Configure termination.  
LC model drives are designed for installation in host sys-  
tems that have a backplane with single connector attach-  
ment (SCA) connections. Termination is normally provided  
on this backplane. Check your host system documentation  
for details.  
You can use this drive in host systems that do  
not have a backplane with SCA connectors by  
using a SCA to wide SCSI-2 adapter. These  
adapters separate the interface lines from the power lines. If  
you use such an adapter, proceed with step 2 of the installa-  
tion instructions provided for LW model drives.  
Note. Host systems designed to use LC drives normally provide  
termination power from the host adapter or other source.  
LC model drives cannot be configured to provide termina-  
tion power to the bus.  
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Cheetah 36 Installation Guide, Rev. A  
33  
3. Check the other available jumper settings (optional)  
This drive provides several features for unique configura-  
tions. 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 options  
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 drive to delay  
spinning up until a certain number of seconds elapse or until  
the drive receives a Start Unit command from the host sys-  
tem. The default settings are with both off so that the drive  
begins spinning up as soon as it receives power.  
Write Protect option  
You can install a jumper connecting J2 pins 9 and 10 to pre-  
vent anyone from writing data to this disc drive (users can  
still read data from the drive). This jumper is normally left off  
to allow users to write data to the drive.  
Parity 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 docu-  
mentation to determine whether your host adapter supports  
parity checking.  
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34  
Cheetah 36 Installation Guide, Rev. A  
Pin 1  
J2  
Pin 2  
R R R  
S D MW P E E E  
E S E P D S S S  
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.  
J2  
J6  
Drive  
Front  
J2 Jumper Plug  
(enlarged to  
show detail)  
Figure 13. Additional jumper options  
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Cheetah 36 Installation Guide, Rev. A  
35  
4. Mount the drive in the host system.  
To mount an LC model drive, plug the drive into the system’s  
single connector attachment (SCA) position on the system’s  
backplane. The SCA connector on the drive contains inter-  
face and power functions, so it does not require a separate  
power connector. The dimensions of the drive are provided  
in Figure 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 (LC model)  
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36  
Cheetah 36 Installation Guide, Rev. A  
K
//  
T
-Z-  
S
[1]  
-Z-  
H
L
J
B
R
Notes:  
N
-Z- -X-  
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).  
A
-Z-  
M
U
-X-  
Dimension Table  
Inches  
Millimeters  
P
A
B
C
D
E
F
G
H
J
1.654 max  
5.787 max  
4.000 ± .010  
3.750 ± .010  
.125 ± .010  
1.750 ± .010  
1.625 ± .020  
1.122 ± .020  
4.000 ± .010  
.250 ± .010  
1.638 ± .010  
.181 ± .020  
.040 max  
42.01 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 ± .50  
1.20 max  
[1]  
G
F
K
L
M
N
P
R
S
T
1.625 ± .020  
2.618 ± .010  
.276 ± .040  
.015 max  
41.28 ± .50  
66.50 ± .25  
7.00 ± 1.02  
0.38 max  
U
.015 max  
0.38 max  
E
D
C
-X-  
Figure 15. Mounting configuration dimensions (LC model)  
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Cheetah 36 Installation Guide, Rev. A  
37  
5. Format the drive.  
Formatting a drive erases all user  
Caution.  
data. Be sure that you understand this principle  
before formatting any hard disc drive. It is not nec-  
essary to format a drive that previously has been used to  
store data unless your intention is to erase all user data.  
Seagate is not responsible for lost user data.  
Important information about formatting the drive  
The drive has been low level formatted at the factory.  
You do not need to perform another low level format on  
this drive unless you decide to perform certain diagnos-  
tics through the host adapter.  
If you do decide to perform a low level format, do not  
abort the format as this is likely to make the drive inoper-  
able. A low level format will typically take less than 30  
minutes.  
Protect against power failure or other power interrup-  
tions during the format.  
Cheetah 36 disc drives are designed to operate with a vari-  
ety of operating systems. Some brief instructions are pro-  
vided 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 instruc-  
tions, please refer to your operating system or drive utility  
documentation.  
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38  
Cheetah 36 Installation Guide, Rev. A  
Note. Hardware platform, operating system, and host  
adapter variations can limit access to the full capac-  
ity of this and other high capacity drives. Refer to  
your system, host adapter, or drive utility documen-  
tation for detailed instructions.  
DOS, Windows 3.1, Windows 95, and Windows 98  
System preparation  
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 spe-  
cial key, such as DELETE, ESC, or F1 during startup.  
See your computer manual for details. Press the appro-  
priate 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  
save 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 A: prompt, type fdisk and press ENTER.  
c. If you have two hard drives installed, the fdisk menu  
displays five options. Option five allows you to select  
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Cheetah 36 Installation Guide, Rev. A  
39  
the drive you want to partition. Make sure that your new  
drive is selected. If you accidently repartition your old  
hard drive, you will erase all data on the drive.  
d. Press 1 to select “Create DOS partition or logical DOS  
drive” and then press the ENTER key.  
e. Press 1 again to select “Create primary DOS partition”  
and then press the ENTER key. Create your first drive  
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 necessary, until all the space on your new hard  
drive has been partitioned.  
g. When the partitioning is complete, fdisk reboots your  
computer.  
Drive formatting  
a. At the A: prompt, type format x where x is the letter of  
your new partition. If this is your boot drive, type format  
x: /s. Make sure you use the correct drive letter. If you  
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!  
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40  
Cheetah 36 Installation Guide, Rev. A  
Macintosh  
Use a third-party drive utility to initialize the drive and follow  
the instructions provided with the utility. Note: versions of  
Apple Drive Setup prior to version 1.3.1 do not recognize  
non-Apple drives.  
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Cheetah 36 Installation Guide, Rev. A  
41  
Seagate Technology support services  
Online Services  
Internet  
For online information about Seagate products, visit  
Presales Support:  
email_presales.shtml or [email protected]  
email_tape_presales.shtml or  
Technical Support:  
email_disc_support.shtml or [email protected]  
email_tape_support.shtml or Ta[email protected]  
®
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  
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42  
Cheetah 36 Installation Guide, Rev. A  
phone numbers, commonly asked questions, troubleshooting  
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: +1-972-481-4812.  
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 (STxxxxx).  
SeaTDD(+1-405-936-1687) is a telecommunications device  
for the deaf (TDD). You can send questions or comments 24  
hours daily and exchange messages with a technical support  
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Cheetah 36 Installation Guide, Rev. A  
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 through Friday.  
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 your live outside the U.S., you can contact an Authorized Ser-  
vice Center for service or repair.  
USA/Canada/Latin America Support Services  
Presales Support  
Disc: 1-877-271-3285 or  
+1-405-936-1210  
FAX: +1-405-936-1683  
Tape: 1-800-626-6637 or  
+1-714-641-2500  
FAX: +1-714-641-2410  
Technical Support (SeaFONE)  
1-800-SEAGATE or +1-405-936-1234 (for specific product  
phone number)  
FAX: Disc: +1-405-936-1685; Tape: +1-405-936-1683  
SeaFAX  
1-800-SEAGATE  
SeaTDD  
+1-405-936-1687  
SeaBOARD  
Disc: +1-405-936-1600; Tape: +1-405-936-1630  
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44  
Cheetah 36 Installation Guide, Rev. A  
Warranty Repair  
USA/Canada  
Latin America  
1-800-468-3472  
+1-405-949-7758  
FAX: +1-405-949-6740  
FAX: +1-405-949-6738  
Authorized Service Centers  
Brazil  
MA Informatica +55-21-516-6649  
FAX: +55-21-516-5280  
FAX: +1-905-660-4951  
Canada  
Memofix  
Adtech  
+1-905-660-4936  
+1-905-812-8099 or FAX: +1-905-812-7807  
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  
+31-20-316-7222 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  
0 800-74 876  
80 88 12 66  
0 800-90 90 52  
0 800-182 6831  
1 800-55 21 22  
1 677 90 695  
0 800-732 4283  
Belgium  
Denmark  
France  
Germany  
Ireland  
Italy  
Netherlands  
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Cheetah 36 Installation Guide, Rev. A  
45  
Norway  
Poland  
Spain  
800-113 91  
00 800-311 12 38  
900-98 31 24  
Sweden  
Switzerland  
Turkey  
0 207 90 073  
0 800-83 84 11  
00 800-31 92 91 40  
United Kingdom 0 800-783 5177  
SeaBOARD  
Germany  
+49-89-1409331  
Fax Services—All European Countries  
Presales/Technical Support/Warranty Repair +31-20-653-3513  
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 +31-20-316-7222 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  
Hong Kong  
Japan  
Singapore  
Taiwan  
+61-2-9725-3366 FAX: +61-2-9725-4052  
+852-2368 9918  
+65-488-7584  
FAX: +852-2368 7173  
FAX: +81-3-5462-2979  
FAX: +65-488-7528  
+886-2-2514-2237 FAX: +886-2-2715-2923  
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46  
Cheetah 36 Installation Guide, Rev. A  
SeaFAX  
Australia  
+61-2-9756-5170  
Warranty Repair  
Japan  
+81-3-5462-2904 FAX: +81-3-5462-2979  
Asia/Pacific and +65-485-3595  
Australia  
FAX: +65-488-7503  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Seagate Technology, Inc.  
920 Disc Drive, Scotts Valley, CA 95066-4544, USA  
Publication Number: 83329450, Rev. A, Printed in USA  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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