Seagate ST118202LW-LC User Manual

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Cheetah 18

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ST118202LW/LC

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Installation Guide

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Contents

Preface..................................................................................... 1

Electrostatic discharge protection ............................................ 1

Important safety information and precautions................... ....... 2

Wichti g e Si c h er h e its h in w ei se . ... ......... ... .......... ......... ... .......... ... 4

Regulatory agency compl iance........... ........ .. ........ ...................7

Seagate Technology support services...................................... 9

General description ................................................................ 15

Initial se tup informa tion .......... .......... .. .......... .......... .. .......... .... 19

Kühlung des Systems............................................................. 29

Installa ti on des Laufwerkes und Anschluß der Kabel.............31

LW drives secti on .. ... ......... ... .......... ......... ... .......... ......... ... ...... 3 9

LC drives section.................................................................... 45

Seagate, Seagate Technology, and the Seagate logo are registered tra dem arks of Seagate Technology, Inc. Cheetah, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are eit her trademarks or registered trademarks of Seagate Technology, Inc. or one of its subsidiaries. All other tradem arks 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 18 Installation Guid e, Rev. A 1

Preface

This manual contains information for users of the Seagate®

Cheetah 18 SCSI disc drives. It provides support services, per-

formance specifications, and initial setup infor mation. Additional

infor mat ion i s availa ble in the

number 8332926 0). Contac t your Seagate sal es repres enta tiv e if

you need to order t his publication.

Electrostatic discharge protection

Caution.

All drive electronic assembli es are sensitive to static electricity,

due to the electrostatically sensitive devices used within the

drive cir cui try. Although some devices such as metal-oxide semi-

conductors are extremely sensitive, all semiconductors, as well

as some resi stors and capacit ors, may be damaged or deg raded

by exposure to static electricity.

Electrost 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 expos ed. Connect yourse lf to ground with a wrist strap (Seagat e par t 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.

Removal of circuit boards by personnel not performing depot repair will damage components and may void the war ranty.

Cheetah 18 Product Manual

(part

2 Cheetah 18 Instal lation Guide, Rev. A

• Turn off the power before removing or installing the DC power cable.

• Do not remov e 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 carrier or tray pr io r to ins e rting it into th e sy st e m.

Important safety information and precautions

Caution.

Use proper safety techniques for safe, reliable operation of this unit.

The procedures in this manual and labels on the unit contain warnings and cautions that must be carefully read and followed to minimize or eliminate the risk of personal injury. The warnings point out conditi ons or practices that may endanger you or others. The cautions point out conditions or practices that may damage the unit, poss ibly making it unsafe for use.

Always observe the following warnin gs and precautions:

• Follow all cautions and warnings in the procedures.

• Use sound safety practices when operating, installing, or removing the uni t.

• 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 t he drive is mounted in an equipment rack or cabinet. When units are

Use forced-air ventilation when bench-testing the drive to ensur e proper cooling of driv e com ponents.

Cheetah 18 Installation Guid e, Rev. A 3

stacked ver tically, pay special attention to the top where temperatures ar e 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 boar ds 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 repairable. If the sealed HDA is opened by personnel not performing depot repair, this will damage components and void the warranty.

As a component, this drive is designed to be installed and operated in accordance with UL1950, EN60950, CAN/CSA C22.2 950-95, and VDE0805.

Seagate takes all reasonable steps to ensure that its products are certifiable to currently accepted standards. Typical 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 r equirements is the provision for overcurrent protection on dr ive SELV supply voltages.

4 Cheetah 18 Instal lation Guide, Rev. A This unit is a component par t and as such is not meant to com-

ply with FCC or simil ar 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.

Fremdbelüftung vorzusehen, um eine ausr eichende Kühlung der Laufwerkkomponenten sicherzustellen.

Verwenden Sie geeignete Sicherheits- um den sicheren, zuverlässigen Betrieb dieser Einheit zu gewährleisten.

Die Verfahren in diesem Handbuch und die Aufkleber auf dem Gerät enthalten Warn- und Vorsichtshinweise. Diese Hinweise sind sorgfältig durchzulesen und zu beachten, um das Risiko von Verletzungen auf ein Mindestmaß zu beschränken oder ganz zu vermeiden. Die War nhinweise machen auf Situationen oder Praktiken aufmerksam, die Sie oder andere gefährden könnten. Die Vorsichtshinweise machen auf Situationen oder Praktiken aufmerksam, die Einheit beschädigen können, so daß deren Gebrauch mit Risiko behaf tet ist.

Die Warn- und Vorsichtshinweise sind nicht allumfassend! Es ist uns einfach nicht möglich, alle Wartungsmethoden oder die eventuellen Risiken jeder Methode zu kennen, zu beurteilen und Sie entsprechend zu beraten. Aus di esem Grund haben wir auf eine derartige umfassende Beurteilung verzichtet. Falls Sie ein hier nicht beschriebenes Verfahren oder Werkzeug verwenden, stellen Sie zuerst sicher, daß das gewählte Verfahren weder Ihre persönliche Sicherheit noch die Leistung der Einheit gefährdet.

Beim Testen des Laufwerks auf dem Prüftisch ist

Cheetah 18 Installation Guid e, Rev. A 5 Beachten Sie in jedem Fall die folgenden Warn-und Vorsicht-

shinweise:

• Beachten Sie alle Warn- und Vorsichtshinweise in diesem Handbuch.

• Treffen Sie beim Betrieb, bei der Installation oder bei der Entfernung der Einheit angemessene Sicherheitsvorkehrungen.

• Wenn eine Einheit unter Spannung steht, gehen Sie bei der Fehlerdiagnose besonders vorsichtig vor. Schalten Sie die Einheit au s, bevor Sie mit den Ins tal lations-un d Entfernungsarbeiten beginne n.

• 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 dor t die Temperatur gewöhnlich am höchsten ist.

• Befolgen Si e 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 Beschädigung der Komponenten und Erlöschen des Garantieanspruchs führ en.

6 Cheetah 18 Instal lation Guide, Rev. A

• 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 Or t reparierbar und darf nicht auseinandergenommen werden! Öffnen der versiegelten HDA durch andere Personen als die für die werkseitige Reparatur zuständigen hat eine Beschädigung der Komponenten und Erlöschen des Garantieanspruchs zur Folge.

Als Teil komponente is t dieses Laufwerk f ür die Ins tallation und den Betrieb in Übe reinstim mung mit UL 19 50, EN6 0950, C AN/ CSA C22.2 950-95 und VDE0805 vorges ehen.

Seagate ist ständig bemüht, die Zulassungsfähigkeit von Seagate-P rodukten im Rahme n der gegenw är tig geltend en Standa rds z u gewäh r leist en. Zu den ty pisch en An wend unge n dieser Festplattenwerke zählen Systemeinbau durch den Kunden und die K on strukti on von Unter systemen. Sicherh eitsbe hörden gewähren eine bedingte Zulassung für Komponenten wie das Cheetah-Festplattenlauf werk vorbehaltlich der endgültigen Zulasssun g im E ndprod ukt. De signer von Unters ysteme n sind dafür ver antwortlich, die Voraussetzungen für die Einhaltung sicherheits- oder aufsichtsbehördlicher Vorschriften in ihren Endprodukten und - falls ge setzlich vorgeschrieben - für die Zulass ung zu sc ha ffen. Eine Gr un dvorau sset zu ng zu r Ei nha ltung der Sicherheitsanforderungen ist die Bereitstellung eines Überlastschutzes für die SELV-Versorgungsspannungen des Laufwerks.

Dieses Gerät ist eine Baugruppe und unterliegt als solche nicht den Anforderungen der FCC oder ähnlicher nationaler Behörden für eigenst ändige Geräte. Technische Testergebnisse zu elektro-

Cheetah 18 Installation Guid e, Rev. A 7 magnetische Str ahlung si nd für Design er von Unte rsyst emen auf

Anfrage von der Seagate-Sicherheitsabteilung erhältlich.

Regulatory agency compliance

Electromagnetic susceptibility

As a component assembly, the drive is not required to meet any susceptibility performance requirements. It is the responsi bility o f 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 the system does not adversely affect the perfor mance of the drive. See DC power requirements on page 18.

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 repre sentative system for typical applications. The selected system represents the most popular characteristics for test platforms. The sy stem configurations include:

• 486, P entium, and P owerPC microprocessors

• 3.5 -inch f loppy disc dri ve

• 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

8 Cheetah 18 Instal lation Guide, Rev. A shall confirm EMC compliance and provide CE Marking and C-

Tick Marking for their product.

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 M ay 1989 as amended by Directi ve 92/31/ EEC of 28 April 1992 and Di rective 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).

Cheetah 18 Installation Guid e, Rev. A 9

Seagate Technology support services

Presales support

To determine which Seagate products are best suited for your specific application, cont act us about configuration and compatibility and for current product availabili ty. You can leave a voice message after business hours or send an e-mail message—we reply during b u siness hours.

Disc Drives 405-936-1210 Fax: 405-936-1683

A.M

(8:00 e-mail: DiscPresales@Seagate.com

to 12:15 P.M., 1:30 P.M. to 6:00

Tape Product s 1-800-626-6637 or 714-641-2500

A.M

Fax: 714-641-2410

e-mail: Tape_Sales_Support@Seagate.com

Note.

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 972-481-4812.

(6:00

to 5:00

T e c hnical support services

If you need assistance 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 ne ed additional assistance with you r Seagate Seagate products, use one of the Seagate technical support services list ed below.

SeaFONE® 1-800-SEAG ATE

Seagate’s 800 number (1-800-732-4283) allows toll-free access to automated self-help services, providing answers to commonly

P.M

, central time, M-F)

P.M

pacific time, M-F)

drive or other

10 Cheetah 18 Installation Guid e, Rev. A asked questions, troubleshooting tips, and specifications for disc

drives and tape drives. This service is available 24 hours daily and requires a touch-tone phone. International callers can reach this automated self-help service by dialing 405-936-1234.

Online services

Using a modem, you can obtain troubleshooting tips, free utility programs, drive specifications and jumper settings for Seagate’s entire product line. You can also download software for installing and analyzing your drive.

SeaNET

You can obtain technical information about Seagate products over the Inte rne t fro m Se aga te’s World Wi de We b hom e pa ge

(http://www.seagate.com) ftp.seagate.com)

DiscSupport @ Seagate.com

Seagate.com

. You can also send E-mail with y our questions

or Seagate’s ftp server

TapeSupport @

Seagate CompuServe forum

Online technical support for Seagate products is available on CompuServe. To access our technical support forum, type

seagate

SeaBOARD. In addition, you can type questions or browse through previous questions and answers on the forum messages.

. This f orum provides information s imi lar to that found on

SeaBOARD®

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 com munications software to eight data bits, no parity, and one stop bit (8-N-1).

(ftp://

Cheetah 18 Installation Guid e, Rev. A 11

Location Phone number

Austral ia 61-2-9756-2359 France 33 1-48 25 35 95 Germany 49-89-140-9331 Taiwan 886-2-2719-6075 Thailand 662-531-8111 UK 44-1628-478011 USA Disc: 405- 936-1600; Tape: 405-936-1630

FAX services

SeaFAX®

You can use a touch-tone telephone to access Seagate’s automated FAX system to receive technical support information by return FAX. This service is a vailable 24 hours daily.

Location Phone number

Austral ia 61-2-9756-5170 Germany 49-89-1430-5102 UK 44-1628-894084 USA Disc: 405-936-1620; Tape: 405-936-1640

Technical support FAX

You can FAX questions or comments to technical support specialists 24 hours daily. Responses are sent during business hours.

Location Phone number

Austral ia 61-2-9725-4052 France 33 1-46 04 42 50

12 Cheetah 18 Installation Guid e, Rev. A

Location Phone number

Germany 49-89-1430-5100 Hong Kong 852-2368 7173 Japan 81-3-5462-2979 Korea 82-2-556-4251/7395 Singapore 65-488-7528 Taiwan 886-2-2715-2923 UK 44-1628-890660 USA Disc: 405-936-1685; Tape: 405-936-1683

Direct-support services

Technical support

For one-on-one help, you can talk to a technical support specialist during local business hours. Before calling, note your system configuration and drive model number (ST

Location Phone number

Australia 61-2-9725-3366 (9:00

time, M–F)

France 33 1-41 86 10 86 (9:30

2:00

P.M

to 5:00

P.M

Germany Disc: 49-89-140-9332; Tape: 49-89-140-9333

(9:30

A.M

to 12:30

P.M

M–F) Hong Kong 852-2368 9918 Kore a 82-2-531-5800 (9:00

P.M

to 6:00

Singapore 65-488-7584 (9:00

to 5:00

P.M

, M–F)

A.M

Taiwan 886-2-2514-2237

A.M

, M–F)

, 2:00

A.M

to 12:00

xxxx

to 5:00

to 12:30

P.M

to 4:00

P.M

, eastern

P.M

, 1:00

, 2:00

P.M

Cheetah 18 Installation Guid e, Rev. A 13

Location Phone number

UK 44-1628-894083 (10: 00

2:00

P.M

to 5:00

P.M

, M–F)

A.M

to 1:00

P.M

USA Please dial 1-800-SEAGATE or 405-936-1234

for the speci fi c product telephone number.

(8:00

A.M

to 12:15

P.M

, 1:30

P.M

to 6:00

P.M

centra l time, M–F)

SeaTDD™ 405-936-1687

Using a telecommunications device for the deaf (TDD), you can send questions or comments 24 hours daily and exchange mes-

A.M

sages with a technical suppor t specialist between 8:00 12:15

P.M

. and 1:30 P.M. to 6:00

P.M

(central time) Monday

through Friday.

Customer service centers

Seagate direct OEM, Distribution, and Systems Integrat or customers should contact their Seagate service represent ative for warranty information. Other customers should contact t heir place of purchase. Seagate offers comprehensive customer support for all Seagate drives. These services are available worldwide.

Location Phone number FAX number

Asia Pacific and Australia 65-485-3595 65-488-7503 Europe, Middle East,

and Africa 31-2031-67300 31-20 65-34320 Japan 81-3-5462-2904 81-3-546 2-2979 USA 1-800-468-3472 405-949- 6740

Other Americas (Braz il ,

Canada, Mexico) 405-949-6706 405-949-6738

14 Cheetah 18 Installation Guid e, Rev. A

Location Phone number FAX number

Manufacturer’s representatives

Brazil

MA Informatica 55-21-516-6649 55-21-516-5280 Canada

Memofix

Adtech

905-660-4936 905-812-8099

905-660-8738 905-812-7807

1-800-624-9857

Mexico

Abicom Seamax

SA DE CV 525-546-4888 525-546-4888

Southern Europe

Caesar Italia 39-688-18149 3 9-688-02103

Cheetah 18 Installation Guid e, Rev. A 15

General description

Cheetah 18 SCSI disc drives are high-speed, random-access digital-data storage devices capable of operating in single-en ded (SE) or low volt age differ ential (LVD) modes.

These two modes are offered to allow you to use this dr ive in systems that use the traditional SE technology or to use it in LVD-capable systems. Refer to page 20 for additional information about LVD technology.

The drive is a component for installation in an enclosure designed for the drive. This is often a rack within the system or an external enclosur e desi gned to house one or more di sc driv es or other peripheral units. In either case, the disc drive must receive adequate cooling (refer to “Providing adequate cooling”) and it must be sufficiently grounded and shielded from emissions. The contains guidelines for a properly designed enclosure.

Attention.

Cheetah 18 Product Manual

This high per formance Chee tah disc drive must have proper power and cooling for reliable operation.

(part number 83329260)

16 Cheetah 18 Installation Guid e, Rev. A

Figure 1. Cheetah 18 family drive (ST118202LW shown)

Cheetah 18 Installation Guid e, Rev. A 17

Characteristics ST118202LW/LC

Interface Ultra2 SCSI Capacity

Unformatted (Gbytes) Formatted (Gbytes)

22.54

18.21

Recording

Cylinders (us er) Read/write data heads Avg bytes/t ra ck

Access time

Average read (msec) Average write (msec)

6,962 24 104,840-159,008

5.9

6.7

Disc rotation

RPM Average latency (msec)

10,025

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)

10.0

(Mbytes/sec) Multi-segmented cache (kbytes) 1,024 standard

4,096 optional

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.

18 Cheetah 18 Installation Guid e, Rev. A

ST118202LW/LC

Single-ended (SE) mode

DC power requirements (±5%)

Maximum start current Maximu m operating current Average idle cur re nt

1. For more detailed power informa tion, refer to the Cheetah 18 Product

Manual, publication number 83329260.

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

0.89A

0.88A

0.72A

2.5A

1.22A

0.98A

Low voltage differential (LVD) mode

0.90A

0.95A

0.74A

2.5A

1.22A

0.98A

Cheetah 18 Installation Guid e, Rev. A 19

Initial setup information

The general information beginning on t his page applies to all of the Cheetah 18 drive models. Af ter reading the general information topics, refer to the appropriate drive-specific section listed below for additional infor mation about configuring and installing your particular model.

Drive models Page

ST118202LW 39 ST118202LC 45

General information

The foll owing general information topics are discussed:

• Single-ended and low voltage differential modes

• SCSI ID jumpers

• Drive termination

• Terminator power

• Interf ace drivers and dat a path width notes

• Other applica ble jumper options

• Providing adequate cooling

• Mounting the dr ive and connecting cables

• Formatting t he drive

This mounting procedure does not apply to “LC” model drives. To mount an “LC” drive, plug the drive into the system’s single connector attachment (SCA) position on the system’s back panel.

20 Cheetah 18 Installation Guid e, Rev. A

Single-ended and low voltage differential modes

This drive incorporates two different transceivers to allow you to use it in traditional systems which may use single-ended (SE) drivers and rec eivers, or to use it in lo w voltage differential (LVD) capable systems which use LVD drivers and receivers.

You can configure the drive to switch between SE and LVD modes automatically or force it to operate in SE mode only as described later in this guide.

LVD technology enhances parallel SCSI I/O performance, reduces power consumption, increases allowable cable lengths, and improves device connectivity be yond SE capabilities.

Note.

To operate at the Ultra2 SCSI rates in LVD mode, all devices 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.

Warning.

Do not mix LVD drives on the sam e daisy chain with devices having high voltage differential (HVD) interface circuits.

SCSI ID jumpers

Each device on the SCSI chain must have a unique SCSI ID. The host system’s SCSI controller usually uses the ID that has the highest priority interrupt in the SCSI I/O system. This is always ID7. ID0 has the lowest priority in an 8-bit I/O system. ID8 has the lowest priority in a 16-bit I/O system. The lower priority SCSI IDs are nor mally used for other SCSI devices such as this Cheetah disc dr ive.

Cheetah 18 Installation Guid e, Rev. A 21 Note. Most SCSI controllers (host adapters) allow you to skip a

SCSI ID. For example, you can have ID0, ID1, and ID3 (skipping ID2). Other controllers do not allow this so be sure to refer to your system or control ler user’s m anual for details about its requirements for proper SCSI device installat io n .

Note. This drive is SCAM (SCSI Configured Auto Magically)

compliant. If the system into which you are installing this drive requires SCAM compliant drives, you do not need to be concerned about the drive ID jumper settings, as the system autom atically assigns your new drive the ID it wants it to have. The system may or may not use the existing drive ID jumper settings. Setting the drive ID doesn’t hurt anything, but is not necessary in a SCAM compliant system.

Most Cheetah disc drives are factory set with the SCSI ID set at

0. To change the SCSI ID, refer to the appropriate drive section for your model.

If, after completing the installation process, the drive’s LED does not show on/off activity when the host is trying to communicate with the drive, a duplicate SCSI ID may be the problem. If this is the case, change the ID so that each device on the SCSI chain has its own unique ID. Also check your system or controller user’s manual to ensure that you have not violated its SCSI ID numbering recomm endations.

22 Cheetah 18 Installation Guid e, Rev. A

Drive termination

If you are installing a Cheetah drive in a system that has other SCSI devices installed, terminate only the end devices on the SCSI chain. A SCSI “device” is any disc drive, scanner, tape backup unit, or other piece of hardware connected to your system using the SCSI bus.

Note.

Use active (ANSI SCSI-2 Alternative 2) single-ended terminators when terminating a bus operating in singleended mode. Use SPI-2-compliant active low voltage differential terminators when terminating a SCSI Ultra2 bus operating in LVD mode.

The top example in Figure 2 shows an i nternal hard disc at one end of the SCSI bus with the SCSI controller at the other end (both are terminated). The bottom example shows two additional SCSI devices connected externally—this means the SCSI controller is no longer on the end of the SCSI chain and should not be terminated.

Note.

Some controller s 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 handled in your particular system.

These drives do not have on-bo ard t erminators, so you m ust terminate external to the drive when termination is required. For ST118202LC drives, this is normally accomplished by terminat-

Cheetah 18 Installation Guid e, Rev. A 23 ing the bus at the backpanel. For ST118202LW dri ves, use an in-

line t e rmina tor on t h e cable.

Internal SCSI cable

Internal

SCSI device

Internal

SCSI device

Internal SCSI cable

Internal

SCSI device

Internal

SCSI device

Terminate

Controller

Terminate

Controller

External

SCSI cable

External

SCSI device

External

SCSI device

Figure 2. SCSI bus termination

T erminator po wer

You usually will not need to change this option and can normally leave the drive conf igured as it was shi pped from the factory. For information about how to change the terminator power opti on on your driv e, refer to the appropriate driv e-specific section.

I/O circuits and data path widths

• These drives can be used in single-ended or low voltage differ-

ential interface systems; however, do not attempt to mix these

drives on the same daisy chain with high voltage differential

devices. The circuits are not compatible and drive damage

may occur.

• These drives have a “wide” (16-bit) SCSI data bus rather than

the standard (non-wide) 8-bit SCSI data bus; however, you

24 Cheetah 18 Installation Guid e, Rev. A

can use these wide drives on a st andard (non-wide) 8-bit data

bus if you pr ovide proper termination to the upper 8-bit data

lines. This is often referred to as providing “high-9 termina-

tion.” Figures 3, 4, and 5 show typical drive conne cti ons. The following table lists the maximum cable lengths and num ber

of devices using single-ended and LVD I/O circuits allowed on a daisy-chain cable for 10, 20, and 40 Mtransfers/sec I/O data transfer ra te s.

T able 1. Cable characteristics for SE and LVD circuits

SCSI driver type

I/O transfer rate (Mtran sfers/s)

Maximum number of devices on bus

Maxi mum ca ble length allowed

SE 10 16 6 meters (19.7 ft.) SE 20 4 3 meters (9.8 ft. ) SE 20 8 1.5 meters (4.9 ft.) LVD 40 16 12 meters (39.4 ft .)

A maximum of 16 devices can be connected on a 16-bit wide data bus.

Cheetah 18 Installation Guid e, Rev. A 25

Figure 3. 68-pin I/O connection to drive (LW model)

Figure 4. 80-pin I/O connection to drive (LC model)

26 Cheetah 18 Installation Guid e, Rev. A

“LW” Model

Drive

Note:

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

SCSI ID 1

[2]

SCSI ID 0

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 or the maximum allowable number of devices on

the SCSI bus. See system documentation and Table 1.

[2] Ex ternal terminat or. Used only on end “LW” drive. Use only SPI-2-

compliant active LVD terminators on SCSI Ultra2 buses.

Figure 5. Multiple-drive connection to host adapter

Cheetah 18 Installation Guid e, Rev. A 27

80-pin

SCSI I/O

Connector

Pin 1

Note. This drive model plugs directly into a backplane connec-

tor and therefore does not use cables.

Figure 6. Drive model “LC” with single 80-pin I/O and

power connector

28 Cheetah 18 Installation Guid e, Rev. A

Providing adequate cooling

The enclosure design must ensure adequate cooling for the drive. The maximum ambient temperature al lowed is 50°C.

The drive’s product manual (83329260) describes how to evaluate the air-flow design. The evaluation consists of ensuring that the case temperature of certain critical components remains within acceptable limits during drive operation.

We recommend orienting the drive or directing the air flow in a way that creates the least amount of air-flow resistance while providing air flow above the circuit boards and around the head and disc assembly (HDA). Also, choose the shortest possible path between the air inlet and exit. This minimizes the distance traveled by air that is heat ed by the drive and by other nearby heat source s.

Figure 7 shows two design approaches with one or more fans used to generate air flow. The air-flow patterns can be created 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.

Cheetah 18 Installation Guid e, Rev. A 29

Kühl ung des Systems

Die Gehäusekonstruktion muß eine ausrei chende Kühlung des Laufwerkes gewährleisten. Die Umg ebungstemperatur darf maximal 50°C betragen.

Die Produkthandbuch Cheetah 18 (Dokument 83329260) enthalten Anweisunge n zur Beur teilun g der Luftstr omkonstruktion. Die Beurteilung muß sicherstellen, daß sich die Gehäusetemperatur bestimmter kritischer Komponenten bei Laufwerkbetrieb innerhalb zugelassener Grenzen hält.

Wir empfehlen, das Laufwerk so zu orientieren oder den Luftstrom so zu l enken, d aß d er ger ingste L uftst romwiders tand erzeugt wird und gleichzeit ig ein Luftstrom über den Platinen und um die Kopf- und Festplatteneinheit (HDA) gegeben ist. Wählen Sie einen möglichst kurzen Weg zwischen Lufteinlaß und -auslaß. Dadurch wird die Strecke, die die vom Laufwerk und anderen nahegelegenen Hitzequellen aufgewärmte Luft zurücklegt, auf ein Minimum beschränkt.

Abbildung 7 zeig t zwe i Konstr ukti onsm öglic hkeite n, bei dene n ein oder mehrere Lüfter den Luftstrom erzeugen. Der Luftstromverlauf wird durch die Lüfter gesteuert, die entweder Luft einblasen oder abzie hen . Genere ll kann d er Lu ftstrom entweder von vorne nach hinten oder von hinten nach vorne verlauf en.

30 Cheetah 18 Installation Guid e, Rev. A

Above unit

Note. Air flows in the direction shown (back to front) or in reverse direction (front to back)

Above unit

Note. Air flows in the direction shown or in reverse direction (side to side)

Under unit

Figure 7. Suggested air flow Abbildung 7. Empfohlener Luftstromverlauf

Under unit

Cheetah 18 Installation Guid e, Rev. A 31

Mounting the drive and connecting cables

Do not touch the connector pins or any components on the control board without observing static-discharge precautions. Always handle the drive by the frame only.

The drive may be mounted in any orientation (horizontally, vertically, and any combination thereof); however, you must ensure that the drive receives adeq uate air flow for cooling.

1. 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.

The maximum length that the screws should extend into the chassis mounting holes is 0.15 inch (3.81 mm), measured from the outer surface of the chassis. Tighten the screws down e venly. Do not over -tighten or f orce the screw if it d oes not seem to screw in easily, because this means the thre ads are not properly aligned. In this case, back the screw out and try again.

Installation des Laufwerkes und Ansch lu ß der K abel

Beachten Sie bei m Han dhaben und Anfassen der Anschlußstifte und Komponenten die Vorsichtsmaßnahmen zur Verhinderung statischer Aufladung. Fassen Sie das Laufwerk nur am Rahmen an.

Das Laufwerk kann in beliebiger Orientierung (horizontal, vertikal oder schräg) installiert werden; jedoch muß dafür gesorgt werden, daß ein ausreichender Luftstrom zur Kühlung des Laufwerkes vorhanden ist.

32 Cheetah 18 Installation Guid e, Rev. A

1. Befestigen Sie das Laufwerk mit vier 6-32-UNC-Schrauben

am Gehäuse des Host-Syst ems. Die beiden Seiten des Laufwerkes sind mit jeweils zwei Befestigungslöchern versehen, die Unterseite des Laufwerkes wei st vier weitere Befestigungslöcher auf.

Gemessen von der Außenfläche des G ehäuses dürfen die Schrauben maximal 3,81 mm in die Befestigungslöcher des Gehüus es hinei nragen. D ie Schra uben mü ssen gl eichmäßig, jedoch nicht zu fest, angezogen werden. Wenn sich eine Schraube nicht ohne Widerstand einschrauben läßt, sind die Gewinde nicht korrekt aneinander ausgerichtet. In diesem Fall die Schrau be nich t in da s Gewi ndeloch forcieren, sondern die Schraube herausnehmen und erneut in das Gewindeloch einführen.

2. Verify that all connections between the drive and the host

system are correctly installed.

2. Prüfen Sie, ob alle Verbindungen zwischen dem Laufwerk

und dem Host-System korrekt hergestellt sind.

3. Verify that y ou have correctly installed jumpers.

3. Stellen Sie sicher, daß die Kennungsbrücken installiert sind.

4. Connect the SCSI cable into the drive’s SCSI connector.

Take care not to s tretch or crimp this cable, and do not b lock the system’s cooling air flow with the cable.

The drive receives DC power through a 4-pin connector mounted next to the SCSI connector. The output of a power supply must meet SELV (safety extra low voltage) as

Cheetah 18 Installation Guid e, Rev. A 33

defined in IEC 950. Figure 8 provides the pin information for the DC power connector. To connect the DC power cable to the drive, simply insert the cable end into the drive’s DC power connector.

4. Schließen Sie das SCSI- K abel an den SCSI-Steckverbinder

des Laufwer kes an. Da s Kabel darf nicht ge dehnt oder gedrückt werden und es darf den Luftstrom zur Kühlung des Systems nicht behindern.

Das Laufwerk wird über einen 4-poligen, neben dem SCSIAnschluß befestigten Steckverbinder mit Gleichstrom versorgt. Der Ausgang eines Netzteils muß SELV (safety extra low voltage) nach IEC 950 entsprechen . Abbildung 8 zeig t die Steckerbelegung für den Gleichstromanschluß. Zum Anschlu ß des G leichs tromk abels an das L aufwer k das Kabelende in den Gleichstromanschluß des Laufwerkes stecken .

1 2 3 4

Power

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

Gleichstrom

+12 V

+12 V Rückleitung

+ 5 V Rückleitung

+ 5 V

4321

Figure 8. DC power connector Abbildung 8. Gleichstromanschluß

34 Cheetah 18 Installation Guid e, Rev. A Note. Signal ground on the power control board assembly

(PCBA) and the head and disc assembly (HDA) are connected together in this drive and you cannot separate them. The equipment in which you have mounted the drive is connected directly to the HDA and PCBA without electrically isolating shock mounts. Maximizing the conductive contact area between HDA ground and system ground may reduce radiated emissions.

If you do not want the system chassis to be connected to the HDA/PCB ground, you must provide a nonconductive (electricall y isolating) meth od of mounting the drive in the host system. This may increase radiated emissions and is the system designer’s responsibility.

Hinweis.

Die Signalerde auf der Stromregelungskarte (PCBA) und der Kopf- und Festp latt enein heit (HDA) si nd in di esem Laufwerk miteinander verbunden und können nicht getrennt werden. Das Gerät, in das Sie das Laufwerk eingebaut haben, ist ohne elektrisch isolierende Stoßdämpfer direkt an di e HDA und PCB angeschlossen. Die elektromagnetische Strahlung kann reduziert werden, indem Sie eine möglichst große leitende Kontakfläche zwischen der HDA-Erdung und der Systemerdung vorsehen.

Wenn Sie das Systemgehäuse nicht an die HDA /PCBAErdung anschließen wollen, müssen Sie das Laufwerk auf nichtleitende Weise (galvanisch isoliert) im Host-System einba uen. Die da raus u.U. resultie ren de vers tärkt e

Cheetah 18 Installation Guid e, Rev. A 35

elektromagnetische Strahlung fällt in den Zuständigkeitsbereich des Syste md esigners.

5. Replace the host system’s cover.

5. Setzen Sie das Gehäuseober teil des Host-Systems wieder

auf.

36 Cheetah 18 Installation Guid e, Rev. A

-Z-

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

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

1.625

± .020

.265

± .010

.315

± .040

.015

max

.015

max

Millimeters

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

41.28

6.73

7.00

0.38

± .50 ± .25 ± .10

max max

-Z-T//

-Z-

-X-

[1]

-X-

Figure 9. Mounting configuration dimensions (LW model)

Cheetah 18 Installation Guid e, Rev. A 37

-Z-

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

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

1.625

± .020

2.618

± .010

.276

± .040

.015

max

.015

max

Millimeters

42.01

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

max max

± .25

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

max

± .50 ± .25 ± 1.02

max max

-Z-T//

-Z-

-X-

[1]

-Z- -X-N

-X-

Figure 10. Mounting configuration dimensions (LC model)

38 Cheetah 18 Installation Guid e, Rev. A

Formatting the drive

Warning.

Note.

1. Turn on DC power.

2. Boot the system from a system floppy di sc or from a previ-

3. Format the disc drive. Cheetah 18 disc drives are designed

Quick reference desktop system notes

• Hardware platform, operat ing system, and host adapter var ia-

tions can limit access to the full capacity of this and other high

capacity drives. Refer to your system or utility manual for

detailed in structions.

• DOS/Windows 3.1 /W indows 95. Set the drive type in CMOS to

“

Zero,” “N one,”

and FORMAT.EXE.

• Macintosh. Use a third-party drive utility or Apple’ s Drive Setup

(version 1.3.1 or later) to initialize the drive. Note: versions of

Apple Drive Setup prior to version 1.3.1 do not recognize non-

Apple drives .

Formatting a drive erases all user data. Be sure that you understand this principle before formatting any hard disc drive. It is not necessary 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.

ously installed hard disc drive if there is one.

to operate with a variety of operating systems. Please refer to your system or SCSI controller manual for information about formatting and setting up the drive. Some quick desktop system notes are provided below.

or “

No hard drive installed

.” Use FDISK.EXE

Cheetah 18 Installation Guide, Rev. A 39

LW drives

LW drives sectionSetting the SCSI ID ju mpers

Use the J6 connector to set the SCSI ID (see Figure 11). To change the SCSI ID, install jumpers as shown in the illu str ation.

Drive Front

Jumper Plug

(enlarged to show detail)

Pin 1

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. Setting the SCSI ID on ST118202LW drives

40 Cheetah 18 Installation Guid e, Rev. A

LW drives

Te rminating th e drive

ST118202LW drives do not have internal terminators or any other way of adding internal termination to t he drive. You must provide ex ternal termination to these drives when ter mination is required. This is normally done by adding an in-l ine t erminator on the cable.

Note.

Cheetah 18 Installation Guide, Rev. A 41

LW drives

T erminator po wer

You can configure this drive to supply termination power to the SCSI bus by placing a jumper on J2 pins 1 and 2. The default setting is no jumper, meaning that some other source (other than this drive) i s suppl ing termination power to the SCSI bus.

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

term power to external terminator

TEDSMEWPP

Pin 1 Pin 2

EST

J2 Jumper Plug

(enlarged to show detail)

Drive Front

Figure 12. Setting terminator power jumpers

42 Cheetah 18 Installation Guid e, Rev. A

LW drives

Other appli cabl e jump e r op tions

Sev eral other jumpe r options are available as illustrated.

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.

SEDSMEWPP

Pin 1 Pin 2

EST

J2 Jumper Plug

(enlarged to show detail)

Drive Front

Cheetah 18 Installation Guide, Rev. A 43

LW drives

68 Pin

SCSI I/O Connector

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.

Pin 1

Pin 12

J5/J1A [2][4]

J1A Pin 1

Pin 1

1P2P3P4P

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 13. Additional jumper options Figure 14. Alternate ID select and LED connection

44 Cheetah 18 Installation Guid e, Rev. A

LW drives

Drive Active indicator

The drive Active LED indicator connections are shown 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.

Figure 15. Drive Active LED indicator connections

Cheetah 18 Installation Guide, Rev. A 45

LC drives

LC drives sectionSetting the SCSI ID ju mpers

The SCSI ID for ST118202LC drives is normally set over the SCSI bus by the host system. You can also use the J6 jumper block to set the SCSI ID (see Figure 16).

Drive

Front

Jumper Plug

(enlarged to show detail)

Pin 1

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 SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15

Figure 16. Setting the SCSI ID on ST118202LC drives

Note:

[1] Do not remove cover from pins 13 through 20 (darkened area).

46 Cheetah 18 Installation Guid e, Rev. A

LC drives

Te rminating th e drive

LC model drives do not have internal terminators or any ot her way of adding internal termination to the drive. You must provide external termination to these drives when termination is required. Since this drive is designed to be plugged into a backpanel or other host enclosure without cabling, this is normally done by enab li ng termination on the backpanel or plane.

Note.

T erminator po wer

ST118202LC drives cannot be configured to provide termination power.

Cheetah 18 Installation Guide, Rev. A 47

LC drives

Other a ppl i ca bl e jum p e r op tions

Other option ju mpers are available as illustrated below.