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Barracuda 9

Disc Drive

ST19171N/W/WD/WC/DC

Installation Guide

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ContentsPreface.........................................................................................1Electrostatic discharge protection................................................1Important safety information and precautions..............................2

Wichtige Sicherheitshinweise ......................................................4Regulatory agency compliance....................................................8Seagate technical support services...........................................10General description.................................................................... 15Initial setup information .............................................................. 20Khlung des Systems ................................................................25Installation des Laufwerkes

und Anschlu der Kabel.......................................................... 27N drives section ......................................................................... 32W/WD drives section..................................................................36WC/DC drives section................................................................41

1997 Seagate Technology, Inc. All rights reservedPublication Number: 83329020, Rev. BAugust 1997

Seagate, Seagate Technology, and the Seagate logo are regis-tered trademarks of Seagate Technology, Inc. Barracuda,SeaFAX, SeaFONE, SeaNET, SeaTDD, and SeaBOARD areeither trademarks or registered trademarks of Seagate Technol-ogy, Inc. or one of its subsidiaries. All other trademarks or regis-tered trademarks are the property of their respective owners.

No part of this publication may be reproduced in any form withoutwritten permission from Seagate Technology, Inc.

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Barracuda 9 Installation Guide, Rev. B 1

PrefaceThis manual contains information for users of the SeagateST19171 Barracuda 9 SCSI disc drives. It provides support

services, performance specifications, and initial setup informa-tion. Additional information is available in the Barracuda 9 Prod-uct Manual (part number 83329030). Contact your Seagatesales representative if you need to order this publication.

Electrostatic discharge protection

Caution. Removal of circuit boards by personnel not perform-ing 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 thedrive circuitry. Although some devices such as metal-oxide semi-conductors are extremely sensitive, all semiconductors, as wellas some resistors and capacitors, may be damaged or degradedby exposure to static electricity.

Electrostatic damage to electronic devices may be caused by thedirect discharge of a charged conductor or by exposure to thestatic fields surrounding charged objects. To avoid damagingdrive electronic assemblies, observe the following precautionswhen 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 wriststrap (Seagate part number 12263496). Connection may bemade to any grounded metal assembly. As a general rule,remember that you and the drive electronics must all begrounded to avoid potentially damaging static discharges.

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2 Barracuda 9 Installation Guide, Rev. B

Turn off the power before removing or installing the DC powercable.

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-testing thedrive to ensure proper cooling of drive components.

Use proper safety and repair techniques for safe, reliable opera-tion of this unit. Service should be done only by qualified per-sons. We recommend the procedures in this manual as effectiveways of servicing the unit. Some procedures require the use ofspecial tools. For proper maintenance and safety, you must usethese tools as recommended.

The procedures in this manual and labels on the unit contain

warnings and cautions that must be carefully read and followedto minimize or eliminate the risk of personal injury. The warningspoint out conditions or practices that may endanger you or oth-ers. The cautions point out conditions or practices that may dam-age the unit, possibly making it unsafe for use.

These warnings and cautions are not exhaustive. We cannotpossibly know, evaluate, and advise you of all the ways in which

maintenance might be performed or the possible risk of eachtechnique. Consequently, we have not completed any suchbroad evaluation. If you use a non-approved procedure or tool,first ensure that the method you choose will not risk either yoursafety or unit performance.

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Always observe the following warnings and precautions:

Perform all maintenance by following the procedures in thismanual.

Follow all cautions and warnings in the procedures. Use sound safety practices when operating or repairing the

unit. Use caution when troubleshooting a unit that has voltages

present. Turn off power to the unit before servicing it. Wear safety shoes when removing or replacing heavy parts. Ensure that the internal temperature of the rack or cabinet

does not exceed the limits defined for the drive when the driveis mounted in an equipment rack or cabinet. When units arestacked vertically, pay special attention to the top where tem-peratures are usually highest.

Follow the precautions listed above in Electrostatic dischargeprotection.

Do not remove any circuit boards from the drive chassis.Return the entire drive for depot repair if any circuit board isdefective. Removal of circuit boards by personnel not perform-ing depot repair will damage components and may void thewarranty.

Do not remove the head and disc assembly (HDA) from thedrive chassis. Return the entire drive for depot repair if theHDA is defective.

Do not attempt to disassemble the HDA. It is not field repair-able. If the sealed HDA is opened by personnel not performingdepot repair, this will damage components and void thewarranty.

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aratur der Einheit. Einige Verfahren erfordern Spezialwerkzeuge;diese mssen zur sachgemen Ausfhrung der Wartungsarbe-iten und aus Sicherheitsgrnden den Empfehlungen entsprech-end verwendet werden.

Die Verfahren in diesem Handbuch und die Aufkleber auf demGert enthalten Warn- und Vorsichtshinweise. Diese Hinweisesind sorgfltig durchzulesen und zu beachten, um das Risikovon Verletzungen auf ein Mindestma zu beschrnken oderganz zu vermeiden. Die Warnhinweise machen auf Situationenoder Praktiken aufmerksam, die Sie oder andere gefhrden

knnten. Die Vorsichtshinweise machen auf Situationen oderPraktiken aufmerksam, die Einheit beschdigen knnen, so daderen Gebrauch mit Risiko behaftet ist.

Die Warn- und Vorsichtshinweise sind nicht allumfassend! Es istuns einfach nicht mglich, alle Wartungsmethoden oder dieeventuellen Risiken jeder Methode zu kennen, zu beurteilen undSie entsprechend zu beraten. Aus diesem Grund haben wir auf

eine derartige umfassende Beurteilung verzichtet. Falls Sie einhier nicht beschriebenes Verfahren oder Werkzeug verwenden,stellen Sie zuerst sicher, da das gewhlte Verfahren weder Ihrepersnliche Sicherheit noch die Leistung der Einheit gefhrdet.

Beachten Sie in jedem Fall die folgenden Warn-und Vorsicht-shinweise:

Fhren Sie alle Wartungsarbeiten entsprechend denAnweisungen in diesem Handbuch aus.

Beachten Sie alle Warn- und Vorsichtshinweise in diesemHandbuch.

Treffen Sie beim Betrieb oder bei der Reparatur der Einheitangemessene Sicherheitsvorkehrungen.

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Wenn eine Einheit unter Spannung steht, gehen Sie bei derFehlerdiagnose besonders vorsichtig vor. Schalten Sie dieEinheit aus, bevor Sie mit den Reparaturarbeiten beginnen.

Tragen Sie Sicherheitsschuhe, wenn Sie schwere Teile aus-bzw. einbauen.

Wenn das Laufwerk in einem Einbaugestell oder Gehusemontiert ist, sorgen Sie dafr, da die Temperatur im Innerendes Gestells oder Gehuses die fr das Laufwerk vorgege-benen Grenzwerte nicht bersteigt. Wenn Einheiten vertikalbereinander betestigt werden, achten Sie besonders auf denoberen Stapelbereich, da dort die Temperatur gewhnlich am

hchsten ist. Befolgen Sie die oben unter Electrostatic Discharge Protec-

tion angegebenen Sicherheitsmanahmen.

Nehmen Sie keine Platinen aus dem Laufwerkgehuse. Wenneine Platine defekt ist, mu das gesamte Laufwerk zur Rep-aratur eingeschickt werden. Die Herausnahme von Platinendurch andere Personen als die fr die werkseitige Reparaturzustndigen kann zu einer Beschdigung der Komponentenund Erlschen des Garantieanspruchs fhren.

Die vormontierte Kopf- und Festplatteneinheit (HDA) nicht ausdem Laufwerkgehuse nehmen! Falls die HDA beschdigt ist,schicken Sie das gesamte Laufwerk zur Reparatur ein.

Die HDA ist nicht vor Ort reparierbar und darf nicht auseinan-dergenommen werden! ffnen der versiegelten HDA durchandere Personen als die fr die werkseitige Reparatur zustn-digen hat eine Beschdigung der Komponenten undErlschen des Garantieanspruchs zur Folge.

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Als Teilkomponente ist dieses Laufwerk fr die Installation undden Betrieb in bereinstimmung mit UL 1950, EN60950, CSAC22.2 950-M89 und VDE0805 vorgesehen.

Seagate ist stndig bemht, die Zulassungsfhigkeit vonSeagate-Produkten im Rahmen der gegenwrtig geltendenStandards zu gewhrleisten. Zu den typischen Anwendungendieser Festplattenwerke zhlen Systemeinbau durch denKunden und die Konstruktion von Untersystemen. Sicherheitsbe-hrden gewhren eine bedingte Zulassung fr Komponenten wiedas Barracuda-Festplattenlaufwerk vorbehaltlich der endgltigen

Zulasssung im Endprodukt. Designer von Untersystemen sinddafr verantwortlich, die Voraussetzungen fr die Einhaltungsicherheits- oder aufsichtsbehrdlicher Vorschriften in ihrenEndprodukten und - falls gesetzlich vorgeschrieben - fr dieZulassung zu schaffen. Eine Grundvoraussetzung zur Einhal-tung der Sicherheitsanforderungen ist die Bereitstellung einesberlastschutzes fr die SELV-Versorgungsspannungen des

Laufwerks.Dieses Gert ist eine Baugruppe und unterliegt als solche nichtden Anforderungen der FCC oder hnlicher nationaler Behrdenfr eigenstndige Gerte. Technische Testergebnisse zu elektro-magnetische Strahlung sind fr Designer von Untersystemen aufAnfrage von der Seagate-Sicherheitsabteilung erhltlich.

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Regulatory agency compliance

Electromagnetic susceptibility

As a component assembly, the drive is not required to meet any

susceptibility performance requirements. It is the responsibility ofthose integrating the drive within their systems to perform thosetests required and design their system to ensure that equipmentoperating in the same system as the drive or external to the sys-tem does not adversely affect the performance of the drive. SeeDC power requirements on page 17.

Electromagnetic compliance

Seagate uses an independent laboratory to confirm complianceto 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 tothe directives/standard(s), we cannot guarantee that all systemswill comply. The computer manufacturer or system integratorshall confirm EMC compliance and provide CE Marking and C-Tick Marking for their product.

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Electromagnetic compliance for the European Union

If this model has the CE Marking it complies with the EuropeanUnion 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 theElectromagnetic Compatibility (EMC) Framework requirementsof Australias Spectrum Management Agency (SMA).

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Seagate technical support servicesIf 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. Ifyou need additional assistance with your Seagatedrive or otherSeagate products, use one of the Seagate technical support ser-vices listed below.

SeaFONE 1-800-SEAGATE

Seagates 800 number (1-800-732-4283) allows toll-free accessto automated self-help services, providing answers to commonly

asked questions, troubleshooting tips, and specifications for discdrives and tape drives. This service is available 24 hours dailyand requires a touch-tone phone. International callers can reachthis automated self-help service by dialing 408-456-4496.

Online services

Using a modem, you can obtain troubleshooting tips, free utility

programs, drive specifications and jumper settings for Seagatesentire product line. You can also download software for installingand analyzing your drive.

SeaNET

You can obtain technical information about Seagate productsover the Internet from Seagates World Wide Web home page(http://www.seagate.com) or Seagates ftp server (ftp://ftp.seagate.com). You can also send E-mail with your questionsto DiscSupport @ Seagate .com or TapeSupport @Seagate.com.

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Seagate CompuServe forum

Online technical support for Seagate products is available onCompuServe. To access our technical support forum, type goseagate. This forum provides information similar to that found onSeaBOARD. In addition, you can type questions or browsethrough previous questions and answers on the forum mes-sages.

SeaBOARD

SeaBOARD is a computer bulletin board system that containsinformation about Seagate disc and tape drive products and is

available 24 hours daily. Set your communications software toeight data bits, no parity, and one stop bit (8-N-1).

Location Phone number

Australia 61-2-9756-2359England 44-1628-478011France 33 1-48 25 35 95Germany 49-89-140-9331

Singapore TBATaiwan 886-2-719-6075Thailand 662-531-8111USA Disc: 408-434-1080; Tape: 408-456-4415

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FAX services

SeaFAX

You can use a touch-tone telephone to access Seagates auto-

mated FAX system to receive technical support information byreturn FAX. This service is available 24 hours daily.

Seagate technical support FAXYou can FAX questions or comments to technical support spe-cialists 24 hours daily. Responses are sent during businesshours.


Australia 61-2-9756-5170England 44-1628-894084USA 1-800-SEAGATE or 408-456-4496


Australia 61-2-9725-4052

England 44-1628-890660France 33 1-46 04 42 50Germany 49-89-1430-5100Hong Kong 852-2368 7173Japan 81-3-5462-2979Korea 82-2-556-7294/4251Singapore 65-488-7528Taiwan 886-2-715-2923USA 408-944-9120

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Direct-support services

Seagate technical support

For one-on-one help, you can talk to a technical support special-

ist during local business hours. Before calling, note your systemconfiguration and drive model number (STxxxx).

SeaTDD 408-944-9121Using a telecommunications device for the deaf (TDD), you cansend questions or comments 24 hours daily and exchange mes-sages with a technical support specialist between 6:00 A.M. to11:15 A.M. and 12:30 P.M. to 5:00 P.M. (Pacific time) Mondaythrough Friday.


Australia 61-2-9725-3366 (9:00 A.M. to 5:00 P.M., MF)England 44-1628-894083 (10:00 A.M. to 1:00 P.M.,

2:00 P.M. to 5:00 P.M., MF)France 33 1-41 86 10 86 (9:30 A.M. to 12:30 P.M.,

2:00 P.M. to 5:00 P.M., MF)Germany Disc: 49-89-140-9332; Tape: 49-89-140-9333

(9:30 A.M. to 12:30 P.M., 2:00 P.M. to 4:00 P.M.,MF)

Hong Kong 852-2368 9918Korea 82-2-556-8241Singapore 65-488-7584 (9:00 A.M. to 12:00 P.M., 2:00 P.M.

to 5:00 P.M., MF)Taiwan 886-2-514-2237USA Please dial 1-800-SEAGATE or 408-456-4496

for the specific product telephone number.(6:00 A.M. to 11:15 A.M., 12:30 P.M. to 5:00 P.M.,Pacific time, MF)

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Customer service centers

Seagate direct OEM, Distribution, and System Integrator cus-tomers should contact their Seagate service representative for

warranty information. Other customers should contact their placeof purchase. Seagate offers comprehensive customer supportfor all Seagate drives. These services are available worldwide.

Location Phone number FAX number

Asia Pacific and Australia 65-485-3595 65-485-4980Europe, Middle East,

and Africa 31-2031-67300 31-2065-34320

Japan 81-3-5462-2904 81-3-5462-2979USA 1-800-468-3472 405-949-6740

Other Americas (Brazil,Canada, Mexico) 405-949-6706 405-949-6738

Manufacturers representatives

Brazil

MA Informatica 55-11-810-7794 55-21-253-6467Canada

MemofixAdtech

905-660-4936905-812-80991-800-624-9857

905-660-8738905-812-7807

MexicoAbicom Seamax

SA DE CV 525-546-6965 525-546-4888

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General descriptionBarracuda 9 SCSI disc drives are high-speed, random-accessdigital-data storage devices.

The drive is a component for installation in an enclosuredesigned for the drive. This is often a rack within the system oran external enclosure designed to house one or more disc drivesor other peripheral units. In either case, the disc drive mustreceive adequate cooling (refer to Providing adequate cooling)and it must be sufficiently grounded and shielded from emis-sions. The Barracuda 9 Product Manual (part number

83329030) contains guidelines for a properly designedenclosure.

Figure 1. Barracuda 9 disc drive

(N model shown)

Pin 1

SCSI I/OConnector

Pin 1

DC PowerConnector

J6

J1

J2

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Characteristics ST19171

Interface SCSI Fast-20 (also calledUltra SCSI)1

CapacityUnformatted 11.7 GbytesFormatted2 9.1 Gbytes

RecordingCylinders (user) 5,274Read/write data heads 20Servo heads Embedded

Seek time3

Average read 9.7 msecAverage write 10.7 msec

Disc rotationRPM 7,200 0.5%Average latency 4.17 msec

Internal transfer rate 80 to 124

(Mbits/sec, variable with zone)Max sync. SCSI transfer rateN 20 Mbytes/secW/WD/WC/DC 40 Mbytes/sec

Multi-segmented cache 512 Kbytes2,048 Kbytes (optional)

1Can also be operated according to SCSI-1 and SCSI-2 proto-

cols.2Standard factory units are formatted as follows:512 data bytes per sector9 spare sectors per cylinder1 cylinder at the inner track reserved for spares

3Includes on-board controller overhead.

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DC power requirements

1Measured with an average reading DC ammeter. Instanta-neous +12V current peaks will exceed these values.

Single-ended Differential

+5V11

5%

+12V

5%2

+5V11

5%

+12V

5%2

Voltage regulation5

Amps

Maximum operating current1 0.93 0.89 1.17 0.89

Maximum starting currentPeak DC3,6Peak AC3

0.92

2.183.1

1.04

2.183.1

Delayed motor start (max)1,4 0.82 0.08 0.90 0.08Peak operating current

Typical DC1Maximum DC1Maximum (peak)

0.920.931.00

0.840.891.8

1.121.171.89

0.840.891.8

Track following (DC)at OD1

at ID10.840.83

0.730.76

0.960.94

0.730.76

Read trackOD DC1AC

0.961.10

0.780.97

1.491.99

0.780.97

SeekingTypical DC1, 13

Maximum DC1

Maximum (peak) AC

0.91

0.920.96

1.06

1.11.8

0.99

1.051.77

1.06

1.11.8

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2A 10% tolerance is permissible during initial start of the spin-dle but must return to 5% before reaching 7,200 RPM. The5% must be maintained after the drive signifies that itspower-up sequence has been completed and that the drive isable to accept selection by the host initiator.

3See the +12V current profile in the Barracuda 9 Product Man-ual(publication number 83329030).

4This condition occurs when the Motor Start option is enabledand the drive has not yet received a Start Motor command.

5

See Conducted noise immunity in the Barracuda 9 ProductManual. The specified voltage tolerance is inclusive of ripple,noise, and transient response.

6At power-up, the motor current regulator limits the +12V cur-rent to an average value of less than 1.4A, although instanta-neous peaks may exceed this value. These peaks shouldmeasure 5 msec duration or less.

7Minimum current loading for each supply voltage is not lessthan 4% of the maximum operating current shown.

8Use separate ground returns for +5V and +12V supplies.

9Where power is provided to multiple drives from a commonsupply, carefully consider individual-drive power requirements.

Where multiple units are powered on simultaneously, be surethe peak starting current is available to each device.

10 Operating condition is a third-stroke seek at OD and read oneTrack. A command is issued every 0.075 seconds (every 0.063seconds on wide and SCA drives).

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11 No terminator power. See 11.7.3.4 in the Barracuda 9 ProductManual.

12 All power-saving features are enabled; ASA II code only.

13 Seeking is defined as a third-stroke seek at OD. The commandis issued every 20 msec.

14 Read track is defined as repeat reads of track 15 with a dutycycle of: 78% for N drives, 32% for W drives, 48% for WCdrives, 44% for WD drives, and 44% for DC drives.

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Initial setup informationThe general information beginning on this page applies to all ofthe Barracuda 9 drive models. After reading the general informa-

tion topics, refer to the appropriate drive-specific section listedbelow for additional information about configuring and installingyour particular model.

Drive models Page

ST19171N 32

ST19171W ST19171WD 36

ST19171WC ST19171DC 41

General information

The following general information topics are discussed:

SCSI ID jumpers

Drive termination

Terminator power Interface drivers and data path width notes

Other applicable jumper options Providing adequate cooling Mounting the drive and connecting cables* Formatting the drive

*This mounting procedure does not apply to WC or DC modeldrives. To mount a WC or DC drive, plug the drive into the sys-tems single connector attachment (SCA) position on the sys-tems back panel.

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SCSI ID jumpers

Each device on the SCSI chain must have a unique SCSI ID.The host systems SCSI controller usually uses the highest-num-

bered ID available; therefore the lower-numbered SCSI IDs arenormally used for other SCSI devices such as this Barracudadisc drive.

Note. Most SCSI controllers (host adapters) allow you to skip aSCSI ID. For example, you can have ID0, ID1, and ID3(skipping ID2). Other controllers do not allow this so besure to refer to your system or controller users manual

for details about its requirements for proper SCSI deviceinstallation.

Most Barracuda disc drives are factory set with the SCSI ID setat 0. To change the SCSI ID, refer to the appropriate drive sec-tion for your model.

If, after completing the installation process, the drives LED doesnot show on/off activity when the host is trying to communicatewith the drive, a duplicate SCSI ID may be the problem. If this isthe case, change the ID so that each device on the SCSI chainhas its own unique ID. Also check your system or controllerusers manual to ensure that you have not violated its SCSI IDnumbering recommendations.

Drive termination

If you are installing a Barracuda drive in a system that has otherSCSI devices installed, terminate only the end devices on theSCSI chain. A SCSI device is any disc drive, scanner, tapebackup unit, or other piece of hardware connected to your sys-tem using the SCSI bus.

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The top example in Figure 2 shows an internal hard disc at oneend of the SCSI bus with the SCSI controller at the other end(both are terminated). The bottom example shows two additionalSCSI devices connected externallythis means the SCSI con-troller is no longer on the end of the SCSI chain and should notbe terminated.

Note. Some controllers prefer to remain terminated even if theyare in the middle of the chain. Also, some controllers treatthe internal and external chains as separate logicalbuses. This means you may need to terminate both the

first and last devices on both logical buses to achieveproper termination. If necessary, refer to your system orcontroller documentation to see how this is handled inyour particular system.

For information about how to terminate your drive, refer to theappropriate drive-specific section.

Figure 2. SCSI bus termination

InternalSCSI device

InternalSCSI device Controller

ExternalSCSI device

ExternalSCSI device

ExternalSCSIcable

Internal SCSI cable

Terminate

InternalSCSI device

InternalSCSI device Controller

Internal SCSI cable

Terminate

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Terminator power

You usually will not need to change this option and can normallyleave the drive configured as it was shipped from the factory. For

information about how to change the terminator power option onyour drive, refer to the appropriate drive-specific section.

I/O circuits and data path widths

WD and DC models use differential I/O circuits. You cannotmix these models with single-ended models (N, W, WC) on thesame SCSI bus. The circuits are incompatible with each other.

W, WD, and WC models have a wide (16-bit) SCSI data busrather than the standard (non-wide) 8-bit SCSI data bus; how-ever, you can use these wide drives on a standard (non-wide)8-bit data bus.

Providing adequate cooling

The enclosure design must ensure adequate cooling for thedrive. The maximum ambient temperature is 50C.

The drives product manual (83329030) describes how to evalu-ate the air-flow design. The evaluation consists of ensuring thatthe case temperature of certain critical components remainswithin acceptable limits during drive operation.

We recommend orienting the drive or directing the air flow in away that creates the least amount of air-flow resistance while

providing air flow above the circuit boards and around the headand disc assembly (HDA). Also, choose the shortest possiblepath between the air inlet and exit. This minimizes the distancetraveled by air that is heated by the drive and by other nearbyheat sources.

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Figure 3 shows two design approaches with one or more fansused to generate air flow. The air-flow patterns can be createdby the fans either pushing or drawing air. The overall flow patterncan be directed from front to back, back to front, or side to side.

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Khlung des Systems

Die Gehusekonstruktion mu eine ausreichende Khlung desLaufwerkes gewhrleisten. Die Umgebungstemperatur darf max-

imal 50

C betragen.Die Produkthandbuch Barracuda 9 (Dokument 83329030)enthalten Anweisungen zur Beurteilung der Luftstromkonstruk-tion. Die Beurteilung mu sicherstellen, da sich die Gehuse-tempera tu r bes t immte r k r i t i sche r Komponen ten be iLaufwerkbetrieb innerhalb zugelassener Grenzen hlt.

Wir empfehlen, das Laufwerk so zu orientieren oder den Luft-

strom so zu lenken, da der geringste Luftstromwiderstanderzeugt wird und gleichzeitig ein Luftstrom ber den Platinenund um die Kopf- und Festplatteneinheit (HDA) gegeben ist.Whlen Sie einen mglichst kurzen Weg zwischen Lufteinlaund -ausla. Dadurch wird die Strecke, die die vom Laufwerkund anderen nahegelegenen Hitzequellen aufgewrmte Luftzurcklegt, auf ein Minimum beschrnkt.

Abbildung 3 zeigt zwei Konstruktionsmglichkeiten, bei denenein oder mehrere Lfter den Luftstrom erzeugen. Der Luftstrom-verlauf wird durch die Lfter gesteuert, die entweder Luft einbla-sen oder abziehen. Generell kann der Luftstrom entweder vonvorne nach hinten oder von hinten nach vorne verlaufen.

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.

Figure 3. Suggested air flow

Abbildung 3. Empfohlener Luftstromverlauf

SEAG

ATE

SEAG

ATE

Above unitber der Einheit

Under unitUnter der Einheit

Above unitber der Einheit

Under unitUnter der Einheit

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

Hinweis. Luftstrom in der angezeigten Richtung(von vorne nach hinten) oder in umgekehrterRichtung (von hinten nach vorne)

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

Hinweis. Luftstrom in der angezeigten Richtung oder inumgekehrter Richtung (von Seite zu Seite)

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Mounting the drive and connecting cables

Do not touch the connector pins or any components on the con-trol board without observing static-discharge precautions.

Always handle the drive by the frame only.The drive may be mounted in any orientation (horizontally, verti-cally, and any combination thereof); however, you must ensurethat the drive receives adequate air flow for cooling.

1. Mount the drive to the host systems chassis using four 6-32UNC screws. Two mounting holes are in each side of thedrive and there are four mounting holes in the bottom of the

drive.The maximum length that the screws should extend into thechassis mounting holes is 0.15 inch (3.81 mm), measuredfrom the outer surface of the chassis. Tighten the screwsdown evenly. Do not over-tighten or force the screw if it doesnot seem to screw in easily, because this means the threadsare not properly aligned. In this case, back the screw outand try again.

Installation des Laufwerkes

und Anschlu der Kabel

Beachten Sie beim Handhaben und Anfassen der Anschlustifteund Komponenten die Vorsichtsmanahmen zur Verhinderungstatischer Aufladung. Fassen Sie das Laufwerk nur am Rahmenan.

Das Laufwerk kann in beliebiger Orientierung (horizontal, ver-tikal oder schrg) installiert werden; jedoch mu dafr gesorgtwerden, da ein ausreichender Luftstrom zur Khlung des Lauf-werkes vorhanden ist.

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1. Befestigen Sie das Laufwerk mit vier 6-32-UNC-Schraubenam Gehuse des Host-Systems. Die beiden Seiten desLaufwerkes sind mit jeweils zwei Befestigungslchernversehen, die Unterseite des Laufwerkes weist vier weitereBefestigungslcher auf.Gemessen von der Auenflche des Gehuses drfen dieSchrauben maximal 3,81 mm in die Befestigungslcher desGehuses hineinragen. Die Schrauben mssen gleich-mig, jedoch nicht zu fest, angezogen werden. Wenn sicheine Schraube nicht ohne Widerstand einschrauben lt,

sind die Gewinde nicht korrekt aneinander ausgerichtet. Indiesem Fall die Schraube nicht in das Gewindelochforcieren, sondern die Schraube herausnehmen und erneutin das Gewindeloch einfhren.

2. Verify that all connections between the drive and the hostsystem are correctly installed.

2. Prfen Sie, ob alle Verbindungen zwischen dem Laufwerkund dem Host-System korrekt hergestellt sind.

3. Verify that you have correctly installed jumpers.

3. Stellen Sie sicher, da die Kennungsbrcken installiert sind.

4. Connect the SCSI cable into the drives SCSI connector.

Take care not to stretch or crimp this cable, and do not blockthe systems cooling air flow with the cable.

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

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defined in IEC 950. Figure 4 provides the pin information forthe DC power connector. To connect the DC power cable tothe drive, simply insert the cable end into the drives DCpower connector.

4. Schlieen Sie das SCSI-Kabel an den SCSI-Steckverbinderdes Laufwerkes an. Das Kabel darf nicht gedehnt odergedrckt werden und es darf den Luftstrom zur Khlung desSystems nicht behindern.

Das Laufwerk wird ber einen 4-poligen, neben dem SCSI-Anschlu befestigten Steckverbinder mit Gleichstrom ver-

sorgt. Der Ausgang eines Netzteils mu SELV (safety extralow voltage) nach IEC 950 entsprechen. Abbildung 4 zeigtdie Steckerbelegung fr den Gleichstromanschlu. ZumAnschlu des Gleichstromkabels an das Laufwerk dasKabelende in den Gleichstromanschlu des Laufwerkesstecken.

Figure 4. DC power connector

Abbildung 4. Gleichstromanschlu

Pin1234

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

4 3 2 1

Pin1234

Gleichstrom+12 V+12 V Rckleitung+ 5 V Rckleitung+ 5 V

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Note. Signal ground on the power control board (PCB) and thehead and disc assembly (HDA) are connected together inthis drive and you cannot separate them. The equipmentin which you have mounted the drive is connecteddirectly to the HDA and PCB without electrically isolatingshock mounts. Maximizing the conductive contact areabetween HDA ground and system ground may reduceradiated emissions.

If you do not want the system chassis to be connected tothe HDA/PCB ground, you must provide a nonconductive

(electrically isolating) method of mounting the drive in thehost system. This may increase radiated emissions andis the system designers responsibility.

Hinweis:

Die Signalerde auf der Stromregelungskarte (PCB) undder Kopf- und Festplatteneinheit (HDA) sind in diesemLaufwerk miteinander verbunden und knnen nichtgetrennt werden. Das Gert, in das Sie das Laufwerkeingebaut haben, ist ohne elektr isch isol ierendeStodmpfer direkt an die HDA und PCB angeschlossen.Die elektromagnetische Strahlung kann reduziert wer-den, indem Sie eine mglichst groe leitende Kontak-flche zwischen der HDA-Erdung und der Systemerdungvorsehen.

Wenn Sie das Systemgehuse nicht an die HDA/PCB-Erdung anschlieen wollen, mssen Sie das Laufwerkauf nichtleitende Weise (galvanisch isoliert) im Host-Sys-

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N drives

N/ND drives sectionSetting the SCSI ID jumpers

Use the J6 connector to set the SCSI ID (see Figure 5). To

change the SCSI ID, install jumpers on the appropriate pins asshown in the illustration.

Figure 5. Setting the SCSI ID

A2 A1 A0

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

ReservedLED

RES

RES

Jumper Plug(enlarged toshow detail)

J6

DriveFront

Pin 1

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N drives

Terminating the drive

ST19171N drives are terminated with permanently mounted IC

active terminators. If you install one of these drives and it is noton the end of the SCSI bus, disable the terminators by removingthe jumper from pins 15 and 16 of connector J2 (see Figure 6). Ifyou install the drive on the end of the SCSI bus, enable termina-tion by installing a jumper on pins 15 and 16 of connector J2.

Figure 6. Terminating the drive

Disable SCSI terminator

Enable SCSI terminator (default)

SCSI I/OConnector

Pin 1J2

T

E

D

S

M

E

W

P

P

D

RE

S

T

P

T

P

DC PowerConnector

J2

DriveFront

J6J1

J2 Jumper Type(enlarged toshow detail)

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N drives

Terminator power

There are three possible terminator power configurations for

ST19171N drives (see Figure 7). You will not normally need tochange this option and can leave the drive configured as it wasshipped from the factory.

Figure 7. Setting terminator power jumpers

Term. Power to SCSI Bus

Term. Power from Drive (default)

TE

DS

ME

WP

PD

RES

TP

TP

Term. Power from SCSI Bus

Position A

SCSI I/O

Connector

Pin 1J2

DC PowerConnector

J2

DriveFront

J6J1


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N drives

Other applicable jumper options

Several other jumper options are available as illustrated.

Figure 8. Additional jumper options

Enable parity check ofSCSI bus (default).

Disable parity check.

J2 Pin 1

Reserved

Parity Check option

Write protect = Off(enables writing default).

Write protect = On(disables writing).

Write Protect option

Disable the Delay MotorStart option (default).

Motor start delay equalto the SCSI ID multipliedby 12 seconds. Forexample, if the SCSIID = 2, the drive startsin 24 seconds.

Delay Motor Start option(valid only if the EnableMotor Start jumper isnot connected)

Enable motor start. Thedrive waits for the StartUnit command from thehost before starting thespindle motor.

Disable motor start(default). The drivestarts according to theDelay Motor Start option.

Motor Start option

Pin 1End

SCSI I/OConnector

Drive withHDA up, PCBdown, viewed

from front

Pin 1

DC PowerConnector

J2

Drive Front J6

J1

Pin 1HDA

J6

A2A1A0

Reserved

RemoteLED

L

E

D

R

E

S

R

E

S

Reserved

Shipped with cover installed.Do not remove.

Do not install jumperson these four positions.

J6Jumper Type(enlarged toshow detail)

CATH

11

12


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W/WD drives

W/WD drives sectionSetting the SCSI ID jumpers

Use the J6 jumper block to set the SCSI ID (Figure 9). To change

the SCSI ID, install jumpers on the appropriate pins as shown inthe illustration. Optional connections to switching circuits in hostequipment are provided on J1 auxiliary to set the SCSI ID (seeFigure 10).

Figure 9. Setting the SCSI ID

A2A3 A1 A0

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

ReservedLED

RES

SCSI ID = 8

SCSI ID = 9

SCSI ID = 10

SCSI ID = 11

SCSI ID = 12

SCSI ID = 13

SCSI ID = 14

SCSI ID = 15

Jumper Plug(enlarged toshow detail)

J6

DriveFront

Pin 1

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W/WD drives

Figure 10. Using the J1 auxiliary jumper block

A3 A2 A1A0

DC PowerConnector68 PinSCSI I/O Connector

J1 Auxiliary

Pin 1

J1 Auxiliary

Drive HDA (rear view, PCB facing downward)

Pin 1

PCBPin 12

1P2P3P4P

Pins 2, 4, 6, and 8 are driven lowfor 250 ms after PWR ON and resetto allow jumper-selectable SCSI ID.

*

(default)SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

SCSI ID = 7

A3 A2 A1A0

J1 Auxiliary

*Fault LED

*Vendor Unique

*Spindle Sync

*Activity LED

No Connection

Ground

+5V

SCSI ID = 8

SCSI ID = 9

SCSI ID = 10

SCSI ID = 11

SCSI ID = 12SCSI ID = 13

SCSI ID = 14

SCSI ID = 15

Pin 1 Pin 1

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W/WD drives


ST19171W drives are terminated with permanently mounted IC

active terminators. If you install one of these drives and it is noton the end of the SCSI bus, disable the terminators by removingthe jumper from pins 15 and 16 of connector J2. If you install thedrive on the end of the SCSI bus, enable termination by installinga jumper on pins 15 and 16 of connector J2 (see Figure 11).

Note. Use active (ANSI SCSI-2 Alternative 2) terminators whenterminating the bus.

ST19171WD drives do not have internal terminators or any otherway of adding internal termination to the drive. You must provideexternal differential termination to these drives when terminationis required.

Figure 11. Terminating the drive (ST19171W shown)

*Disable SCSI terminator

*ST19171W only

*Enable SCSI terminator (default)

TE

DS

ME

WP

PD

RES

TP

TP

SCSI I/OConnector

DC PowerConnector

J2

DriveFront

J6J1


Pin 1J2

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W/WD drives

Terminator power

There are three possible terminator power configurations for

ST19171W drives (see Figure 12). You will not normally need tochange this option and can leave the drive configured as it wasshipped from the factory.

There are two possible terminator power configurations forST19171WD drives (see Figure 12).

Figure 12. Setting terminator power jumpers

Term. Power to SCSI Bus

Term. Power from Drive (default)

ST19171WTE

DS

ME

WP

PD

RES

TP

TP

Host adapter or other device providesterm. power to external terminator.

Term. Power to SCSI Bus (default)

ST19171WD

Term. Power from SCSI Bus

Position A

SCSI I/OConnector

DC PowerConnector

J2

DriveFront

J6J1


Pin 1J2

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W/WD drives

Other applicable jumper options

Other option jumpers are available as illustrated below.

Figure 13. Additional jumper options

Enable parity check ofSCSI bus (default).


J2 Pin 1

Reserved

Parity Check option

Write protect = Off(enables writing default).

Write protect = On(disables writing).


Disable the Delay MotorStart option (default).

Motor start delay equal

to the SCSI ID multipliedby 12 seconds. Forexample, if the SCSIID = 2, the drive startsin 24 seconds.

Delay Motor Start option(valid only if the EnableMotor Start jumper isnot connected)

Enable motor start. The

drive waits for the StartUnit command from thehost before starting thespindle motor.

Disable motor start(default). The drivestarts according to theDelay Motor Start option.

Motor Start option

Pin 1End

SCSI I/OConnector

Drive withHDA up, PCBdown, viewed

from front

Pin 1

DC PowerConnector

J2

Drive Front J6

J1

Pin 1HDA

J6

A2 A1 A0

Reserved

RemoteLED

LED

RES

RES

Reserved

Shipped with cover installed.Do not remove.

Do not install jumperson these four positions.

J6Jumper Type(enlarged toshow detail)

CATH

11

12


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WC/DC drives

WC/DC drives sectionSetting the SCSI ID jumpers

The SCSI ID for WC and DC drives is normally set over the SCSI

bus by the host system using connector contacts 39 (ID0), 40(ID2), 79 (ID1), and 80 (ID3).


ST19171WC and ST19171DC drives do not have internal termi-nators or any other way of adding internal termination to thedrive. You must provide external termination to these driveswhen termination is required.

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WC/DC drives

Applicable jumper options

Option jumpers are available as illustrated below.

Figure 14. Jumper options

Enable parity check of SCSI bus(default).


Parity Check option

Write protect = Off(enables writing default)Write protect = On(disables writing)


The host system has completecontrol over motor start functions. Donot install a jumper on these pins.

Delay Motor Start option

The host system has completecontrol over motor start functions. Donot install a jumper on these pins.

Enable Motor Start option

RES

DS

ME

WP

PD

RES

RES

RES

SCSI I/OConnector

DC PowerConnector

J2

DriveFront

J6J1


Pin 1J2

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