Seagate ST136403LW/LC,Cheetah 36,ST136403LW,ST136403LC Installation Manual
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Cheetah 36
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Disc Drive
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ST136403LW/LC
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Installation Guide
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Contents
Preface..................................................................................... 1
Electrostatic discharge protection ............................................ 2
Important safety informati on and precautions.. ....... .. ........... .... 3
Wich tige S ic h er h e itshin w ei se............. ... .......... .. ..... .. ... ..... .. ...... 5
Regula tory agency compliance................. ....... .. ....... ............... 8
General description ................................................................ 10
Kühlung des Systems............................................................. 13
How to install the drive ........................................................... 17
Seagate Technology support services.................................... 41
©1999 Seagate Technolog y, Inc. All rights res erved
Publication Number: 83329450, Rev. A
March 1999
Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seag ate 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 for m with-
out writt en permission from Seaga te Technology, Inc.
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-
ti ons, and cooling requiremen ts.
Additional information is available in the
Manual
(part number 83329440). Contact your Seagate sales
Cheetah 36 Product
representative if you need to order this publication.
2 Cheetah 36 Installation Gui de, 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
ins tall 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 t he circuit board or
the top of t he drive.
Electrostatic discharge protection
Caution.
performing depot repair will damage components and
may void the warranty.
Removal of cir cuit boards by personnel not
All drive electronic assemblies are sensitive to static electricity
due to the electrostatically sensitive devices used within the
drive circui try. Althou gh som e devices such as metal-ox ide semiconductors are extremely sensitive, all semiconductors, as well
Cheetah 36 Installation Guide, Rev. A 3
as some resistors and capacitors, ma y be damaged or degra ded
by exposure to static electricity.
Elect rost atic damage t o electr onic 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 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 inst alli ng the drive on a carrier or t ra y, di scharge the car-
rie r o r tray pr io r to ins e rting it into th e syst e m .
Importan t safety information and precau tions
Caution.
ing the drive to ensure proper cooling of drive components.
Use forced-air ventilation when bench- test-
Use proper safety techniques for safe, reliable operation of this
unit.
• The procedures in this manual and l abels on the unit contain
warnings and cautions that must be carefully read and fol-
4 Cheetah 36 Installation Gui de, 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 ma y damage the unit , possibly m aking it unsafe for use.
Always observe the following warnings and precautions:
• Follow al l cautions and war nings 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 befo re re mo ving 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 temperatures are usual ly 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
repai r will damage compo nents and may void the w arranty.
• 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-
abl e. If t he sealed HDA is opened by personn el not performing
depot repair, this will damage components and void the
warranty.
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 applications of these disc drives include customer packaging and subsystem design. Safety agencies conditionally cer tify 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 requirement s 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 Depar tment to assist the subsystem
designer.
Wichtige Sicherheitshinweise
Vorsicht.
belüftung vorzusehen, um eine ausreichende Kühlung der Laufwer kkom po ne n te n sich er zust el len.
Verwenden Sie geeignete Sicherheits- um den sicheren, zuverlässigen Betrieb dieser Einheit zu gewährleisten.
Beim Testen des Laufwerks auf dem Prüftisch ist Fremd-
Die Verfahren in diesem Handbuch und die Aufkleber auf dem Gerät
enthalten Warn- und Vorsichtshinweise. Diese Hinweise sind sorgfältig durchzulesen und zu beachten, um das Risiko von Verletzungen auf ein Mindestmaß zu beschränken oder ganz zu ver meiden.
Die Warnhinweise machen auf Situationen oder Praktiken aufmerk-
6 Cheetah 36 Installation Gui de, Rev. A
sam, die Sie oder ander e gefährden könn ten. Die Vorsi chtshinweise
mac hen a uf Situ at ione n ode r Prak tiken aufm erks am, die E inh eit
bes chädi gen kö nnen, so da ß dere n Gebr auch mit Risik o behaf tet ist .
Di e Warn- und Vorsichtsh inweise sind nicht allumfassend! Es ist uns
einfach nicht möglich, alle Wartungsmethoden oder die eventuellen
Risiken jeder Methode zu kennen, zu beurteilen und Sie entsprechend z u bera ten . Aus die sem Gru nd haben wir auf ei ne de rar tige
umfassende Beurteilung verzichtet. Falls Sie ein hier nicht beschr iebenes Verfahren oder Werkzeug verwenden, stellen Sie zuerst
sicher, daß das gewählte Verfahren weder Ihre persönliche Sicherheit noch die Leistung der Einheit gef ährdet .
Beachte n Sie in jedem Fall die folgende n Wa rn-un d Vorsich tshinwe i se:
• Beachten Sie alle Warn- und Vorsichtshinweise in diesem Handbuch.
• Treffen Sie beim Betrieb, bei der Installation oder bei der Entfernung
der Einheit angemessene Si cherheitsvorke hrungen.
• Wenn eine Einheit unter Spannung steht, gehen Sie bei der Fehlerdiagnose besonders vorsichtig vor. Schalten Sie die Einheit aus,
bevor Sie mit den Instal lations-un d Entfernungsarbeite n 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 S icherheitsmaßnahmen.
• 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-
Cheetah 36 Installation Guide, Rev. A 7
chädigung der Komponenten und Erlöschen des Garantieanspruchs
führen.
• Die vor montierte Kopf- und Festplatteneinheit (HDA) nicht aus dem
Laufwerkgehäuse nehmen! Falls die HDA beschädigt ist, schicken
Sie das gesamte Laufwerk zur Repara tur ein.
• Die HDA ist nicht vor Ort reparierbar und darf nicht auseinandergenommen werden! Öffnen der versiegelten HDA durch ander e Personen als die für die werkseitige Reparatur zuständigen hat eine
Beschädigung der Komponenten und Erlöschen des Garantieanspr uc h s zu r Folg e.
Als Teilkomponente ist dieses Laufwerk für die Installation und den
Betrieb in Übereinstimmung mit UL 1950, EN60950, CAN\CSA
C2 2.2 950-M 95 und VDE0 805 vorgesehen.
Seagate ist ständig bemüht, die Zulassungsfähigkeit von SeagateProdukten im Rahmen der gegenwär tig geltenden Standards zu
gewährleisten. Zu den typischen Anwendungen dieser Festplattenwerke zählen Systemeinbau durch den Kunden und die Konstruktion
von Untersystemen. Sicherheitsbehörden gew ähren eine bedingte
Zulassung für Komponenten w ie das Cheetah-Festplattenlaufwerk
vorbehaltlich der endgültigen Zulasssung im Endprodukt. Designer
von Untersystemen sind dafür verantwortlich, die Voraussetzungen
für die Einhaltung s icherheits- oder aufsichtsbehördlicher Vorschrift en in ihren Endprodukten und - falls gesetzlich vorgeschrie ben
- für die Zulassung zu schaffen. Eine Grundvoraussetzung zur Ein-
haltung de r Sicherhei tsanforderu ngen ist die Be reitstellung e ines
Überlastschutzes für die SELV-Versorgungsspannungen des Laufwerks.
Dieses Gerät ist eine Baugruppe und unterliegt als solche nicht den
Anforderungen der FCC oder ähnlicher nationaler Behörden für
eigenständige Geräte. Technische Testergebniss e zu elektromagnetis che Str ahlung s ind für Design er von Un tersystemen auf
Anfrage von der Seagate-Sicherheitsabteilung erhältlich.
8 Cheetah 36 Installation Gui de, Rev. A
Regulatory agency compliance
Elect romagneti c susceptibil ity
As a component assembly, the drive is not required to meet any
susceptibili ty perform ance requi rem ents. It is the r esponsibilit y of
those integrating the drive within their systems to perfor m those
tests required and design their system to ensure that equipment
operating in the same system as the drive or external to t he system does not adversely affect the performance of the drive. See
DC power requirements on page 16.
Elect romagnetic compliance
Seagate uses an independent laboratory to confirm compliance
to the dir ectives/standard(s) for CE Marking and C- Tick Marking .
The drive was tested in a representative system for typic al appl ications. The selected system represents the most popular characteristics for test platforms. The sy stem configurations include:
• 486, Pentium, and PowerPC microprocessors
• 3 . 5 -inc h floppy di sc dr ive
• Keyboard
• Monitor/display
• Printer
• External mo dem
• 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 CTic k M arki ng for their product.
Cheetah 36 Installation Guide, Rev. A 9
Elect romagn etic compliance for the European Union
If this model has the CE Marking it complies with the European
Union requirements of the Electromagnetic Compatibility Directi ve 89/336/EEC of 03 M ay 1989 as am ended by Directiv e 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 (SMA).
10 Cheetah 36 Installation Guide, Rev. A
General description
Cheetah 36 SCSI disc drives are high-speed, random-access
digital-data storage devices capab le of operating in single-en ded
(SE) or low voltage di fferential (LVD) modes.
This multimode capability allows you to use this drive in systems
that use the traditional SE technology or in LVD-capable systems.
Figur e 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
suff iciently grounded and shielded from emissions. The
36 Product Manual
(part number 83329440) contains guidelines
for a properly designed enclosure.
Cheetah
Cheetah 36 Installation Guide, Rev. A 11
Single-ended and low voltage differential mod es
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 lengt hs.
• 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
configur e 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
de vices on th e same bus must be running i n 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 of
reaching Ultra2 SCSI transfer rates.
Cauti on.
devic es having high volt age diffe rential (HV D) int erface
Do not mix LVD drives on the same bus with
circuits. The circuits are not compatible and drive dam-
age may occu r.
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 pr ovide proper
termination to the upper eight data li nes. This is often referred to
as providing “hi gh-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 cir cuits.
Table 1. SE and LVD b us configurations
Maximum
SCSI
number of
driver
type
I/O tran sfer rate
(Mbytes/s)
devices on
bus
Ma xi mum ca ble
length allowed
SE 20 16 6 meters (19.7 f t.)
SE 40 4 3 me te rs (9.8 ft.)
SE 40 8 1.5 meters (4.9 ft.)
LVD 80 16 12 meters (39.4 ft.)
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 evaluate the air-flow desi gn. 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 36 Installation Guide, Rev. A 13
by t he fans either pushing or drawing air. The overall flow pattern
can be directed from fr ont to back, back to front, or side to side.
Kühlung des Systems
Die Gehäusekonstruktion muß eine ausreichende Kühlung des Laufwerkes gew ährleisten. Die Umgebungstemperatur darf maximal
50°C betragen.
Die Produkthandbuch Cheetah 36 (Dokument 83329440) enthalten
Anwe isunge n zur Beu rt eilung d er Lufts tromkons truktio n. Die
Beur te ilung muß s iche rstell en, da ß sic h die Geh äuset empe ratur
bestimmter kritischer Komponenten bei Laufwerkbetrieb innerhalb
zugelassener Grenzen hält .
Abbildung 2 zeigt zwei Kon struktionsmöglichkeiten, bei denen ein
oder mehrere Lüfter den Luftstrom erzeugen. Der Luftstromverlauf
wird durch die Lüfter gesteuer t, die entweder Luft einblasen ode r
abzieh en. Ge nerell ka nn d er Luftstr om e ntweder von vo rne na ch
hinten oder von hinten nach vorne verlaufen.
14 Cheetah 36 Installation Guide, Rev. A
.
Above 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
Abbildu ng 2. Empfohle ne r Luftst romve rla uf
Under unit
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