Seagate CHEETAH 9 ST19101N/W/WC/WD/DC, CHEETAH 9 ST19101N, CHEETAH 9 ST19101W, CHEETAH 9 ST19101WC, CHEETAH 9 ST19101WD Installation Manual
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Cheetah 9
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Disc Drive
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ST19101N/W/WC/WD/DC
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Installation Guide
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Contents
Preface ........................................................................................1
Electro static discharge protection................................................2
Imp ortant safety informatio n and pre cautions. .............................3
Wichtige Sicherheitshinweise ....................... .. .............................5
Regulatory agency compliance....................................................8
Seagate technical support se rvices..... ...... ........... .....................10
General description ....................................................................15
Initial setup informati on............................ ..... .............................20
Kühlung des Systems................................................................30
Installati on des Laufwerkes und Anschluß der Kabel................32
N drives section .........................................................................39
W/WD drives section ........................................................ .........43
WC/DC drives sectio n. ...............................................................48
All drives (LED connections)................. .....................................50
©1997 Seagate Technology, Inc. All rights reserved
Publicatio n Number: 83329160, Rev. B
June 1997
Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology, Inc. Cheetah, SeaFAX,
SeaFONE, SeaNET, SeaTDD, and SeaBOARD are either trademarks or registered trademarks of Seagate Technology, Inc. or
one of its subsidiaries. All other trademarks or registered trademark s are the property of thei r respective owners.
No part of this p ublication may be repro duced in any form without
written permission from Seagate Technology, Inc.
Cheetah 9 Installation Guide, Re v. B 1
Preface
This manual contains information for users of the Seagate®
Cheetah 9 SCSI disc drives. It provides support services, performance specifications, and initial setup information. Additional
information is available in the
Cheetah 9 Product Manual
(part
number 83329170). Contact your Seagate sales representative
if you need to order this publication.
Attention. This high performance Cheetah disc drive MUST
have proper power and cooling considerations for
reliable operation.
Why is ther e a differ ence between 10,000 RPM and 7,200 RPM
disc drives?
• Cheetah disc drives spinning at 10,000 RPM will dissipate
more heat than 7,200 RPM class disc drives (typical power
dissipation is 22.5 watts).
• The increased heat is primarily d ue to incre ased motor power
dissipated inside the drive.
• The increase in heat dissipation requires that the Cheetah
10,000 RPM disc drives receive more cooling consideration
than 7,200 RPM class disc drives.
• Proper consideration of enhanced cooling by conduction (heat
transfer thru material) ca n reduce the convection cooling (heat
transfer by air motion) requirem ents.
Note. Please contact Seagate technical support services or
your distributor ’s technical support if you have questions.
2 Cheetah 9 Installation Guide, Rev. B
Electros tatic disch arge p rotecti on
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 the
drive circuitry. Although some devices such as metal-oxide
semiconductors are extremely sensitive, all semiconductors, as
well as some resistors and capacitors, may be damaged or
degraded by exposure to static elect ricity.
Electrostatic damage to electronic devices may be caused by
the direct discharge of a charged conductor or by exposure to
the static fields surrounding charged objects. To avoid dam aging
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 cir cui t boards.
• When installing the drive on a carrier or tray, discharge the
carrier or tray prior to inserting it into the system.
Cheetah 9 Installation Guide, Re v. B 3
Impo rtant safety inform ati on and precau tion s
Caution. Use forced-air ventilation when bench-testing the
drive to ensure proper cooling of drive components.
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 follo wed
to minimize or eliminate the risk of personal injury. The warnings
point out conditio ns or practices that may endanger you or others. The cautions point out conditions or practices that may damage the unit, possibly making it unsafe for use.
Always observe the following warnings and pre cautions:
• Follow all cautions and warnings in the procedures.
• Use sound safety practices when operating, installing, or
removing the unit.
• Use caution when troubleshooting a unit that has voltages
present. Turn off power to the unit before removing it.
• Ensure that the internal temperature of the rack or cabinet
does not exceed the limit s defined for the drive w hen the drive
is mounted in an equipment rack or cabinet. When units are
stacked vertically, pay special attention to the top where temperatures are usually highest.
• Follow the precautions listed above in “Electr ostatic discharge
prote ction.”
• Do not remove any circuit boards from the drive. Return the
entire drive for depot repair if any circuit board is defective.
Removal of circuit boards by personnel not performing depot
repair will d amage components and may void the warranty.
4 Cheetah 9 Installation Guide, Rev. B
• Do not separate the he ad and disc as sembl y (HDA) from t he
PCB. Return the entire drive for depot repair if the HDA is
defective.
• Do not attempt to disassemble the HDA. It is n ot field repair-
able. 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 i s designed to be install ed an d operated in accordance with UL1950, EN60950, CSA C22.2 950M89, 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 de sign. Safety agencies conditionally certi fy 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 requir ements is the provision for overc urrent prot ection on drive SELV supply voltages.
This unit is a component part and as such is not meant to comply
with FCC or similar national requirement s as a stand-alone unit.
Engineering radiated emissions test results are available
throu gh the Seagate Safety Department to assist the subsystem
designer.
Cheetah 9 Installation Guide, Re v. B 5
Wichti ge S ich erh eitsh inwei s e
Vorsi cht . Beim Testen des Laufwerks auf dem Prüftisch ist
Fremdbelüftung vorzusehen, um eine ausreichende Kühlung der
Laufwerkkomponenten sicherzustellen.
Verwenden Sie geeignete Sicherheits- um d en sicheren, zuverlässigen Betrieb dieser Einheit zu gewährlei sten.
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 Warnhinweise 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 behaftet ist.
Die Warn- und Vorsichtshinweise sind nicht allumfa ssend! Es ist
uns einfach nicht möglich, alle Wartungsmethoden oder die
eventuellen Risiken jeder Methode zu kennen, zu beurteilen und
Sie entsprechend zu beraten. Aus diesem 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 no ch die Leistung der Einheit gefährdet.
Beachten Sie in jedem Fall die folgenden Warn-und Vorsichtshinweise:
• Beachten Sie alle Warn- und Vorsichtshinweise in diesem
Handbuch.
6 Cheetah 9 Installation Guide, Rev. B
• 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 aus, bevor Sie mit den Installations-und Entfernungsarbeiten beginnen.
• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse
montiert i st, sorgen Sie dafür, daß die Temperatur im In neren
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 Protec-
tion” 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 führen.
• Die vormontierte Kopf- und Festplatteneinheit (HDA) nicht aus
dem Laufwerkgehäuse nehmen! Falls die HDA beschädigt ist,
schicken Sie das gesamte Laufwerk zur Reparatur ein.
• Die HDA ist nicht vor Ort reparierbar und darf nicht auseinan-
dergenommen werden! Öffnen der versiegelten HDA durch
andere Personen als die für die werkseitige Reparatur zustän-
Cheetah 9 Installation Guide, Re v. B 7
digen hat eine Beschädigung der Komponenten und
Erlöschen des Garantieanspruchs zur Folge.
Als Teilkomponente ist dieses Laufwerk für die Installation und
den Betrieb in Übereinstimmung mit UL 1950, EN60950, CSA
C22.2 950-M89 und VDE0805 vorgesehen.
Seagate i st st ändig bemüht, die Zulassungsfähigkeit von
Sea gate-Pro dukten im R ahmen d er gegenw ärtig gel tenden
Standards zu gewährleisten. Zu den typischen Anwendungen
dieser F estplattenwerke zählen Systemeinbau durch den
Kun den un d die Konst ruktio n von Untersystemen. Sicherheitsbehörden gewähren eine bedingt e Zulassung für Komponenten
wie das Cheet ah-Festplattenlauf werk vor b ehaltlich der endgültigen Zulasssung im Endprodukt. Designer von Untersystemen
sind dafür verantwortlich, die Vo raussetzungen f ür die Einhaltung sicherheits- oder aufsichtsbehördlicher Vorschri ften in ihren
Endprodukten und - falls gesetzlich vorgeschrieben - für die
Zulassung zu schaffen. Eine Grundvoraussetzung zur E inhaltung der Sicherheitsanforderungen ist die Bereitstellung eines
Überlastschutzes für die SELV- Versorgungsspannungen des
Laufwerks.
Dieses G erät ist ei ne Baugr uppe und unterl iegt als solche ni cht
den Anforderungen der FCC oder ähnlicher nationaler Behörden
für eigenständige Geräte. Technische Testergebnisse zu elektromagnetische Strahlung sind für Designer von Untersystemen auf
Anfrag e von der Seagate-Sicherheitsabteilu ng erhältlich.
8 Cheetah 9 Installation Guide, Rev. B
Regulatory agency compliance
Electromagnetic susceptibility
As a component assembly, the drive is not requir ed to meet any
susceptibility performance requirements. It is the respons ibility of
those integrating the drive within th eir sy stems to perform those
tests required and de sign their system to en sure that equipment
operatin g in the same system as the drive or external to the system does not adversely affect the performance of the drive. See
Table 2, DC power requirements.
Electromagnetic compli ance
Seagate uses an independent laboratory to confirm compliance
to the directives/standard(s) for CE Marking and C-Tick Marking.
The drive was tested in a representative system for typical applications. The selected system represents the most popular characteristics for test platforms. The system conf igurations include:
• 486, Pentium, and PowerPC microprocessors
• 3.5-inch floppy disc drive
• Keyboard
• Monitor/display
• Printer
• External modem
• Mouse
Although the test system with this Seagate model complies to
the directives/standard(s), we ca nnot guarantee that all systems
will comply. The computer manufacturer or system integrator
shall confirm EMC compliance a nd provide CE M arking and CTick Marking for their product.
Cheetah 9 Installation Guide, Re v. B 9
Electromagnetic compli ance for the European Unio n
If this model has the CE Marking it complies with the European
Union requirements of the Electromagnetic Compatibility Di rective 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.
Australi an C-Tick
If this model has the C- Tick Marking it complies with the A ustralia/New Zealand Standard AS/NZS3548 1995 and meets the
Electromagnetic Compatibility (EMC) Framework requirements
of Australi a’s Spectrum Management Agency (SMA).
10 Cheetah 9 Installation Guide, Rev. B
Seagate technical 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 conflict s and other technical issues. If
you need additional assistance with your Seagate
other Seagate products, use one of the Seagate te chnical support services listed below.
SeaFONE® 1-800-SEAGATE
Seagate’s 800 number (1-8 00-732-4283) allows toll -free a ccess
to automated self-help services, providing answers to commonly
asked questions, troubleshooting tips, and specificat ions for disc
drives and tape drives. This service is available 24 hours daily
®
drive or
and requires a touch-to ne phone. International callers can reach
this automated self-help service by dialing 408-456-4496.
Online services
Using a modem, you can obtain tro ubleshooting tip s, 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 t he I nter net fr om Se ag ate ’s Wo rld W id e We b ho me pa ge
(http://www.seagate.com) or Seagate’s ftp server (ftp://
ftp.seagate.com) . You can also send E-mail with your questions
to DiscSupport @ Seagate.com or TapeSupport @
Seagate.com.
Cheetah 9 Installation Guide, Re v. B 11
Seagate CompuServe forum
Online technical support for Seagate products is available on
CompuServe. To access our technical support forum, type
seagate
. This forum provides information similar to that found on
go
SeaBOARD. In addition, you can type questions or browse
through previous questions and answers on the forum messages.
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 communications software to
eight data bits, no parity, and one stop bit (8-N-1).
Location Phone number
Australia 61-2-9756-2359
England 44-1628-478011
France 33 1-48 25 35 95
Germany 49-89-140-9331
Singapore TBA
Taiwan 886-2-719-6075
Thailand 662-531-8111
USA Disc: 408-434-1080; Tape: 408-456-4415
12 Cheetah 9 Installation Guide, Rev. B
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. T his service is available 24 hours dail y.
Location Phone number
Australia 61-2-9756-5170
England 44-1628-894084
USA 1-800-SEAGATE or 408-456-4496
Seagate te chnical support FAX
You can FAX questions or comments to technical support specialists 24 hours daily. Responses are sent during business
hours.
Location Phone number
Australia 61-2-9725-4052
England 44-1628-890660
France 33 1-46 04 42 50
Germany 49-89-1430-5100
Hong Kong 852-2368 7173
Japan 81-3-5462-2979
Korea 82-2-556-7294/4251
Singapore 65-488-7 528
Taiwan 886-2-715-2923
USA 408-944-9120
Cheetah 9 Installation Guide, Re v. B 13
Direct-su pp ort servi ces
Seagate te chnical support
For one-on-one help, you can talk to a technical support specialist during local business hours. Before c alling, note your system
configuration and drive model number (ST
Location Phone number
xxxx
).
Australia 61-2-9725-3366 (9:00 A.M. to 5:0 0 P.M. , M–F)
England 44-1628-894083 (10:00
2:00
P.M. to 5:00 P.M., M–F)
France 33 1-41 86 10 86 (9:30
2:00
P.M. to 5:00 P.M., M–F)
A.M. to 1:00 P.M.,
A.M. to 12:30 P.M.,
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.,
M–F)
Hong Kong 852-2368 9918
Korea 82-2-556-8241
Singapore 65-488-7584 (9:00
A.M. to 12:00 P.M., 2:00 P.M.
to 5:00
P.M., M–F)
Taiwan 886-2-514-2237
USA Pleas e dial 1-800-SEAGATE or 40 8-456-4496 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, M–F)
SeaTDD™ 408-944-9121
Using a telecommunications device for the deaf (TDD), you c an
send questions or comments 24 hours daily and exchange messages with a technical support specialist between 6:00
11:15
A.M. and 12:30 P.M. to 5:00 P.M. (Pacific time) Monday
A.M. to
through Friday.
14 Cheetah 9 Installation Guide, Rev. B
Customer service centers
Seagate direct OEM, Distribution, and System Integrator customers should contact their Seagate service representative for
warranty information. Other customers should contact their 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 65-485-4980
Europe, Middle East,
and Afri ca 31-2 0 31-67300 31-2065-34320
Japan 81-3-5462-2904 81-3-5462-2979
USA 1-800-468-3472 405-949-6740
Other Americas (Brazil,
Canada, Mexico) 405-949-6706 405-949-6738
Manufacturer’s representatives
Brazil
MA Informatica 55-11-810-7794 55-21-253-6467
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 525-546-6965 525-546-48 88
Cheetah 9 Installation Guide, Re v. B 15
General description
Cheetah 9 SCSI disc drives are high-speed, random-access digital-data storage devices.
The d rive is a componen t for installa tion in an enclos ure
designed for the drive. This is often a rack within the system or
an external enclosure designed to house one or more disc drives
or other peripher al units. In either case, the disc drive must
receive adequate cooling (refer t o “Pro viding adequate cooling”)
and it must be sufficiently grounded and shielded from emissions. The
Cheetah 9 Product Manual
(part number 83329170)
contains guidelines for a properly designed enclosure.
*Mode l “N” version with 50-pin SCSI I/O connector
Figure 1. Cheetah 9 family dri v e
16 Cheetah 9 Installation Guide, Rev. B
Table 1. Drive characteristics
Characteristics of the various drives covered by this ma nual are
given in the following tables.
Interface type: SCSI Fast-20 (also called
Ultra SCSI
1
)
Cylinders (user accessable): 6,526
Disk rotation: 10,033 r/min ±.5%
Avg. latency: 2.99 msec
Seek time
2
Average read (typical) 8.2 msec
Average write (typical) 9.7 mse c
Internal transfer rat e 122 to 177 Mbits/sec
(variable with zone)
Multi-segmented cache 442 Kbytes of the .5 Mbyte
physical buffer space
1
Also operates per SCSI-1/SCSI-2/SCSI-3 protocols.
2
Includes on-board controller overhead.
Cheetah 9 Installation Guide, Re v. B 17
Table 1a. Additional drive characteristics
Legend for followin g table listing other drive charact eristi cs:
A = capacity, unformat ted, G b ytes
B = capacity, formatted, Gbytes
1
C = number of read/write data heads
D = max. synchronous SCSI interface transfer rate, Mbytes/sec
Model ABCD
ST19101N 11.7 9.1 16 20
ST19101W 11.7 9.1 16 40
ST19101WC 11.7 9.1 16 40
ST19101WD 11.7 9.1 16 40
ST19101DC 11.7 9.1 16 40
1
Standard OEM units formatted with 512 bytes per sector. The
drive is di vided into six-cylin der-wi de regions. Each region ha s
108 spares when formatted f or 512-byte sectors.
18 Cheetah 9 Installation Guide, Rev. B
Table 2. DC power requirements (Amps)
ST19101
N, W, WC models WD, DC models
Volta ge regulation
+5V
5
± 5% ± 5%
8, 10
+12V
8
2
+5V
± 5% ± 5%
8
+12V
Max. start current
Peak DC
3, 6, 9
0.93 3.22 0.99 3. 22
Delayed motor start
(max)
1, 4
0.79 0.12 0.83 0. 12
Peak operating current
Typical DC
Maximum (peak)
1
Measured with an average reading DC ammeter. Instanta-
1
7
0.89
1.03
1.48
2.7
1.1
—
1.48
2.7
neous +12V current peaks will exceed these values.
8
2
2
A –10% tolerance is permissible during i nitial start of the spindle but must return to ±5% before reaching 10,000 RPM. The
±5% must be maintained after the drive signifies that its
power-up sequence has been com pleted and that the drive is
able to accept selection by the host initiator.
3
See the +12V current profile in the
Cheetah 9 Product Manual
(publication number 83329170).
4
This condition occurs when the Motor Start optio n is enabled
and the drive has not yet received a Start Motor command.
5
See “Conducted noise immunity” in the
Manual.
The specified voltage toler ance is inclusive of ripple,
Cheetah 9 Product
noise, and transient re sponse.
Cheetah 9 Installation Guide, Re v. B 19
6
At power-up, the motor current regulator limits the +12V current to an average value of less than value shown in table,
although instantaneous peaks may exceed this value. These
peaks should measure 5 msec duration or less.
7
Minimum current loading for each supply voltage is not less
than 4% of the maximum operating current shown.
8
Use separate ground returns for +5V and +12V supplies.
9
Where power is provided to multiple drives from a common
supply, carefully consider individual-drive power requirements.
Where multiple units are powered on simultaneously, be sure
the peak starting current is available to each device.
10
No terminator power. See 11.7.3.4 in the
Manual.
Table 3. Dimensions of the drive
in mm
Height 1.62 41.1
Width 4.00 101.6
Depth 5.75 146.05
Weight 2.3 lb (1.04 kg)
Cheetah 9 Product
20 Cheetah 9 Installation Guide, Rev. B
Initial setup information
The general information beginning on this page applies to all of
the Cheetah 9 drive models. After reading the general information topics, refer to the appropriate drive-specific section listed
below for additional information about configur ing and i nstalling
your particular model.
Drive models Page
ST19101N 39
ST19101W/WD 4 3
ST19101WC/DC 48
Gener al inform a tion
The following general information topics are discussed:
• SCSI ID jumpers
• Drive termination
• Ter minator p ower
• Interface drivers and data path width notes
• Other applicable jumper options
• Providing adequate cooling
• Mounting the drive and connecting cables
• Formatting the drive
1
This mounting pro cedure does not apply to “WC” or “DC” model
drives. To mount a “WC” or “DC” drive, plug the drive into the
1
system’s single connector attachment (SCA) position on the
system’s back panel.
Cheetah 9 Installation Guide, Re v. B 21
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 is lowest priority in an 8-bit I/O system. ID8 is
lowest priority in a 16-bit I/O system. The lower priority SCSI IDs
are normall y used for ot her SCSI devices such as this C heetah
disc drive.
Note. Most SCSI controller s (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 controller user’s manual
for details about its requirements for pro per SCSI d evice
inst allati on.
Note. This drive is a SCAM (SCSI Configured Auto Magically)
compliant drive. 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 automatically 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 C heetah disc driv es are factory set wi th the SCSI ID s et at
0. To change the SCSI ID, refer to the appropr iate drive section
for your model.
If, after completing the installation pro cess, the drive’s LED does
not show on/off activity when the host is t rying to comm unicate
with the drive, a duplicate SCSI ID may be the problem. If this is
22 Cheetah 9 Installation Guide, Rev. B
the case, change the ID so that ea ch d evice on the SCSI chain
has its own unique ID. Also check your system or controller
user ’s m anual to ensure that you have not violated its SCSI ID
numbering recommendations.
Drive term i nati on
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.
The top example in Figure 2 shows an internal 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 controll er is no longer on the end of the SCSI chain and should not
be terminated.
Note. Some controllers prefer to remain terminated e ven i f t he y
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.
For information about how to terminate your drive, refer to the
appropriate drive-specific section.
Cheetah 9 Installation Guide, Re v. B 23
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
Term in a tor po wer
You usually will not need to change this option and can normally
leave the drive config ured as it was shipped from the factory. For
informati on about how to change the terminator power o ption on
your drive, refer to the appropriat e drive-specific section.
I/O circu its an d data path widths
• “WD” and “DC” models use differ ent ial I/O circui ts. You c annot
mix these models with single-ended models (“N,” “W,” “WC”)
on the same SCSI bus. The circuits are incompatible with
each other.
• “W,” “WD,” and “WC ” models have a “wide” (16-bit) SCSI data
bus rather than the standard (non-wide) 8-bit SCSI data bus;
however, you can use these wide drives on a standard (nonwide) 8-bit data bus.
24 Cheetah 9 Installation Guide, Rev. B
Figures 3a, 3b, 3c, and 3d show typical drive connections. The
following table lists the maximum cable lengths and number of
devices with single-ended I/O circuits allowed on a daisy-chain
cable for 5 and 20 Mbyt es/ sec I/O data transfer rates.
Table 4. Cable characteristics for single-ended circuits
I/O transfer
rate
Maximum number of
devices on line
Maxi mum cabl e
length allowed
5 Mbytes/s 8 (reg. SCSI bus) 6 meters (1 9.7 ft.)
5 Mbytes/s 16 (wide SCSI bus) 6 meters (19.7 ft.)
20 Mbytes/s 4 (reg. SCSI bus) 3 meters (9.8 ft.)
20 Mbytes/s 8 (reg. SCSI bus) 1.5 meters (4.9 ft.)
20 Mbytes/s (wide SCSI bus)
1
See system documentation. ANSI spec does not specify a
11
value here.
For devices having differential I/O circuits, a maximum cable
length of 25 meters (82 feet) is allowed. A maximum of 8 devices
can be connected on an 8-bit wide data bus, and a maximum of
16 devices can be connected on a 16-bit wide data bus.
Cheetah 9 Installation Guide, Re v. B 25
Figure 3a. 50-pin I/O connectio n to drive
Figure 3b. 68-pin I/O connection to drive
26 Cheetah 9 Installation Guide, Rev. B
“N” Model
Drive
2 through X SCSI devices [1]
Pin 1
(check your
adapter for Pin 1 location)
SCSI ID 1
[2]
SCSI ID 0
SCSI ID 7
Host Adapter
PCB
[1] “X” means up to 6 or the maximum allowable number of devices on
the SCSI bus. See system documentation.
Figure 3c. Multiple drive connection to host adapter
Cheetah 9 Installation Guide, Re v. B 27
“W” Model
Drive
SCSI ID 1
2 through X
SCSI devices [1]
“WD” Model
Drive
Note:
Do not mix
“W” and “WD”
model drives
on the daisy
chain.
Pin 1
(check your
adapter for Pin 1 location)
[2]
Terminator
SCSI ID 7
Host Adapter
SCSI ID 0
PCB
[1] “X” means up to 15 or the maximum allowable number of devices on
the SCSI bus. See system documentation and Table 4.
[2] Exte rnal termina tor. Used only on end “WD” drive.
Figure 3d. Multiple-drive connection to host adapter
28 Cheetah 9 Installation Guide, Rev. B
80-pin
SCSI I/O
Connector
Pin 1
J2
J6
Note. This drive model plugs directly into a backplane connec-
tor and therefore uses no cables.
Figure 3e. Drive model “WC” or “DC” wi th single 80-pin I/O
and power connector
Cheetah 9 Installation Guide, Re v. B 29
Pro vid ing adequ ate cool ing
The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperatur e is 50°C.
The drive’s product manual (83329170) describes how to evaluate the air-f low design. The evaluation consists of ensuring that
the case temperature of certain critical components remains
within acceptable limits during drive operation.
We recommend orienti ng the drive or dire ct ing 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 heated by the drive and by other nearby
heat sources.
Figure 4 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 direct ed from front to back, back to front, or side to side.
30 Cheetah 9 Installation Guide, Rev. B
Kühl un g des System s
Die Gehäusekonstr uktion mu ß eine ausreiche nde Kühlung de s
Laufw erkes g ewährle isten. Die U mgebun gstempera tur darf
maximal 50°C betragen.
Die Produkthandbuc h Cheetah 9 (Dokument 83329170)
enthal ten Anweisung en zur Beurteilu ng der Luftstromk onstruktion. Die Be urteilung muß si cherstellen, daß sich die Gehäusetemperatur bestimmter kritischer Komponenten bei
Laufwerkbetrieb innerhalb zugelassener Grenzen hält.
Wir empfehlen, das Laufwerk so zu orientieren oder den Luftstrom so z u lenken, daß der gering ste Luf tstromw iderstand
erzeugt wird und gleichzeitig 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 Laufwer k
und anderen nahegelegenen Hitzequellen aufgewärmte Luft
zurücklegt, auf ein Minimum beschränkt.
Abbildung 4 zeigt zwei Konstruktionsmöglichkeiten, bei denen
ein oder mehrere Lüfter den Luftstrom erzeugen. Der L uftstromverlauf wird durch die Lüfter gesteuert, die entweder Luft einblasen oder abziehen. Generell kann der Luftstrom entweder von
vorne nach hinten oder von hinten nach vorne verlaufen.
Cheetah 9 Installation Guide, Re v. B 31
(
)
.
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
Figure 4. Suggested air flow
Abbild ung 4. Em pfohlener Luftst rom verlauf
Under unit
side to side
32 Cheetah 9 Installation Guide, Rev. B
Mou nti ng the drive and co nne ctin g cabl es
Do not touch the c onnector pins or any components on the control board without observing static-discharge precautions.
Alw ays handle the drive by the frame only.
The drive may be mounted in an y orientation (horizontally, verti cally, and any combination thereof); however, you must ensure
that the drive receives adequate 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
driv e and there are four mounting holes in the bottom of the
drive.
The maximum length that the screws should extend into the
drive mounting holes is 0.15 inch (3.81 mm), measured
from the outer surf ace of the drive. Tighten the screws down
evenly. Do not over-tighten or force the screw if it does not
seem to screw in easily, because this means the threads
are not properly aligned. In this case, back the screw out
and try again.
Instal latio n des Laufwer kes
und Anschluß der Kabel
Beachten Sie beim Handhaben und Anfassen der Anschlußstifte
und Komponenten die Vorsichtsmaßnahmen zur Verhinderung
statischer Aufladung. Fassen Sie das Laufwerk nur am Ra hmen
an.
Das Laufwerk kann in beliebiger Orientierung (horizontal, vertikal oder schräg) installiert werden; jedoch muß dafür gesorgt
werden, daß ein ausreichender Luftstrom z ur Kühlung des Laufwerkes vorhanden ist.
Cheetah 9 Installation Guide, Re v. B 33
1. Befestigen Sie das Laufwerk mit vier 6-32-UNC-Schr auben
am Geh äuse des Host-Systems. Di e beiden Seiten des
Laufwerkes sind mit jeweils zwei Befestigungslöchern
versehen, die Unterseite des Laufwerkes weist vier weitere
Befestigungslöcher auf.
Geme ssen von der Außenfläche des Gehä uses dürfen die
Schrauben maximal 3,81 mm in die Befestigungslöcher des
Geh üuses hi neinr agen. Die S chrau ben müs sen gle ichmäßig, jedoch nicht zu fest, angezogen werden. Wenn sich
eine Schraube nicht ohne Widerstand einschrauben läßt,
sind di e Gewinde ni cht korrekt anei nander ausger ichtet. In
diesem Fall die Schraube nicht in das Gewindeloch
forcieren, so ndern die Schraube herausnehmen und erneut
in das Gewindeloch einführen.
2. Verify that all connections between the drive and the host
system are correctl y installed.
2. Prüfen Sie, ob alle Verbindungen zwischen dem Laufwerk
und dem Host-S ystem korrekt hergestellt sind.
3. Verif y that you have corr ectly installe d 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 stretch or crimp this cable, and do not
block the system’s cooling air flow with the cable.
The drive receives DC power through a 4-pin connector
mounted next to th e SCSI connector. The output of a power
supply must meet SELV (safety extra low voltage) as
34 Cheetah 9 Installation Guide, Rev. B
Pin
1
2
3
4
Power
+12V
+12V return
+ 5V return
+ 5V
4321
Pin
1
2
3
4
Gleichstrom
+12 V
+12 V Rückleitung
+ 5 V Rückleitung
+ 5 V
defined in IEC 950. Figure 5 provides the pin inf ormation 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-Kabel an den SCSI-Steckverbinder
des L aufwerke s an. Das Ka bel darf nicht gedehn t oder
gedrückt werden und es darf den Luftstrom zur Kühlung des
Systems nicht b ehindern.
Das Laufwerk wird über einen 4-poligen, neben dem SCSIAnschluß befestigte n Steckverbinder mit Gleichstrom versorgt. Der Ausgang eines Netzteils muß SELV (safety extra
low vo ltage) nac h IE C 950 entspre chen. Abbi ldung 5 zeigt
die Steckerbelegung für den G leichstromanschluß. Zum
Anschluß des Gleichstromkabels an das Laufwerk das
Kabelende in den Gleichstromanschluß des Laufwerkes
stecken.
Figure 5. DC power connector
Abbildu ng 5. Gleichstr omanschluß
Cheetah 9 Installation Guide, Re v. B 35
Note. Signal ground on the power control board (PCB) and t he
head and disc assembly (HDA) are connec ted 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 PCB 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 connect ed to
the HDA/PCB ground, you must provide a nonconducti ve
(electrically isolating) method 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 (PCB) und
der Kopf- und Festplatteneinheit (HDA) sind in diesem
Laufwerk miteinander verbunden und können nicht
getrennt werden. Das Gerät, in das Si e das Laufwerk
eingebaut haben, ist ohne elektrisch isolierende
Stoßdämpfer direkt an die HDA und PCB angeschlos sen.
Die elektromagnetische Strahlung kann reduziert werden, indem Sie eine möglichst große leitende Kontakfläche zwischen der HDA-Erdung und der System erdung
vorsehen.
Wenn Sie das Systemgehäuse nicht an die HDA/PCBErdung anschließ en wollen, müssen Sie das Laufwerk
auf nichtleitende Weise (galvanisch isoliert) im Host-System einbauen. Die daraus u.U. resultierende verstärkte
36 Cheetah 9 Installation Guide, Rev. B
elektromagnetische Strahlung fäll t in den Zuständigkeitsbereich des Systemdesigners.
5. Replace the host system’s cover.
5. Setzen Sie das Gehäuseoberteil des Host-Systems wieder
auf.
Cheetah 9 Installation Guide, Re v. B 37
N
P
A
[1]
[3]
R
C
[2]
[4]
K
F
D
G
E
M
L
Notes:
[1]
Mounting holes three on each side,
6-32 UNC. Max screw length into
side of drive 0.15 in. (3.81 mm).
B
J
H
S
[2]
Mounting holes four on bottom,
6-32 UNC. Max screw length into
bottom of drive 0.15 in. (3.81 mm).
[3]
Power and interface connections.
[4]
Decorative front panel.
Inches Millimeters
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
5.750
4.000
1.640
0.625
4.000
0.250
2.375
3.750
2.375
1.750
0.181
0.340
0.190
0.015
1.720
4.100
±
±
±
±
±
±
±
±
±
±
±
±
±
max
±
±
0.010
0.010
0.020
0.020
0.005
0.005
0.010
0.010
0.010
0.020
0.015
0.015
0.010
0.010
0.010
146.05
101.60
41.68
15.87
101.60
6.35
60.32
95.25
60.32
44.45
4.55
8.64
4.83
0.381
43.69
104.14
±
±
±
±
±
±
±
±
±
±
±
±
±
max
±
±
.25
.25
.50
.50
.13
.13
.25
.25
.25
.50
.38
.38
.25
.25
.25
Figure 6. Mounting confi gurati on dimensions
38 Cheetah 9 Installation Guide, Rev. B
Formatting the drive
Warning. 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 dri ve
that previously has been used to store data, unless
your intention is to era se all user data.
Note. Seagate is not responsible for lost user data.
1. Turn on DC power.
2. Boot the system from a system flo ppy disc or from a previously installed hard disc drive if there is one.
3. Format the disc drive. Cheetah 9 disc drives are designed 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.
Quick reference desktop system notes
Note. Refer to your system or utility manual for detailed instruc-
tions)
• DOS. Set the drive type in CMOS to “
hard drive installed
.” Use FDISK.EXE and FORMAT.EXE. Sys-
Zero,” “None,”
or “
No
tems that have operating system Windows 95 release 950B or
later do not need to partition the drive.
• Macintosh. Use a third-party drive utility (Apple’s HD Setup
utility only works with drives having special Apple firmware).
Cheetah 9 Installati on Guide, Rev. B 39
N driv es
N drives sectionSettin g the SCSI ID jumpe rs
Use the J6 connector to set the SCSI ID (see Figure 7). To
change the SCSI ID, install jumpers on the appropriate pins as
shown in the illustration.
Jumper Plug
(enlarged to
show detail)
SCSI ID = 0 (default)
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
J2
J6 [4]
Pin 1
End
Pin 1
J6
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
Figure 7. Set ting the SCSI ID on model “N” drives
40 Cheetah 9 Installation Guide, Rev. B
N driv es
Term i na tin g th e dri ve
“N” model drives are terminated with permanently mounted IC
active terminators. If you install one of these drives and it is not
on the end of the SCSI bus, disable the terminators by removing
the jumper “TE” from pins 15 and 16 of connector J2 (see Fig-
ure 8). If you install the drive on the end of the SCSI bus, enable
termination by installing a jumper on pins 15 and 16 of connector
J2.
Pin 1
J2
T
E
R
D
M
W
P
E
S
E
P
D
S
T
P
2
Pin 2
T
P
1
Enable Terminator (default)
Disable Terminator
J6
J2 Jumper
(enlarged to
show detail)
Drive
Front
Figure 8. Terminating the drive
Pin 1
J2
SCSI I/O
Connector
DC Power
Connector
J1
Cheetah 9 Installati on Guide, Rev. B 41
N driv es
Term in a tor po wer
There are three possible terminator power (TP) configurations
for “N” model drives (see Figure 9). You will not normally need to
change this option and can leave the drive configured as it was
shipped from the factory.
Pin 1
Term. Power from Drive (default)
Term. Power to SCSI Bus
J2
T
E
R
D
M
W
P
E
S
E
P
D
S
T
P
2
Pin 2
T
P
1
Term. Power from SCSI Bus (position A)
Term. Power to SCSI Bus and Drive
Pin 1
J2
J2 Jumper
(enlarged to
show detail)
J6
Drive
Front
SCSI I/O
Connector
DC Power
Connector
Figure 9. Setting term inator power jumpers
J1
42 Cheetah 9 Installation Guide, Rev. B
N driv es
Oth er app licab le jump er opti on s
Several other jumper options are available as illustrated.
J2
Reserved
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).
Pin 1
T
D
M
E
S
R
W
P
E
E
P
D
S
Pin 2
T
T
P
P
2
1
Write protect = On (disables writing).
Parity Check option
Enable parity check of SCSI bus (default).
Disable parity check.
J6
J2 Jumper
(enlarged to
Drive
Front
show detail)
Figure 10. Additional jumper options
Pin 1
J2
SCSI I/O
Connector
DC Power
Connector
J1
Cheetah 9 Installati on Guide, Rev. B 43
W/WD drives
W/WD drives secti onSettin g the SCSI ID jumpe rs
Use the J6 jumper block to set the SCSI ID (Figure 11). To
change the SCSI ID, i nstall jumpers on the appropriate pins as
shown in the illustration. Optional connections to switching circuits in host equipment are provided on J1 auxiliary to set the
SCSI ID (see Figure 12).
Jumper Plug
(enlarged to
show detail)
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
J2
J6 [1]
Pin 1
Pin 1
End
J6
Note:
[1] Do not remove
cover from pins
13 through 20
(darkened area).
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
Figure 11. Setting the SCSI ID on model “W” and “WD”
drives
44 Cheetah 9 Installation Guide, Rev. B
W/WD drives
68 Pin
SCSI I/O Connector
J1
Pin 1
J1A [2][4]
Pin 1
1P2P3P4P
Pin 12
SCSI Address A0
SCSI Address A1
SCSI Address A2
SCSI Address A3
No connection
+5V
Fault LED*
Vendor Unique*
Reserved
Activity LED*
Ground*
J1A Pin 1
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
These pins are driven low for
*
250 ms after PWR ON or
RESET to allow jumper
selectable SCSI ID as shown
to the right.
Figure 12. Model “W” and “WD” drive alternate ID select
and LED connection
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
Cheetah 9 Installati on Guide, Rev. B 45
W/WD drives
Term i na tin g th e dri ve
“W” model drives are terminated with permanently mounted IC
active terminators. If you install one of these drives and it is not
on the end of the SCSI bus, disable the terminators by removing
the jumper “TE” from pins 15 and 16 of connector J2. If you
install the drive on the end of the SCSI bus, enable termination
by installing a jumper on pins 15 and 16 of connector J2 (see
Figure 13).
Note. Use active (ANSI SCSI-2 Alternative 2) ter minators when
terminating the bus.
“WD” model drives do not have internal terminators or any other
way of adding internal termi nation to the drive. You must pro vide
external differential termination to these drives when termination
is required. See Figure 3d.
Pin 1
Enable Terminator (default)
Disable Terminator
J6
J2 Jumper
(enlarged to
show detail)
Drive
Front
J2
T
D
M
W
E
S
E
P
Pin 1
J2
SCSI I/O
Connector
P
D
R
E
S
T
P
2
Pin 2
T
P
1
J1
Figure 13. Terminati ng the drive (“W” model shown)
DC Power
Connector
46 Cheetah 9 Installation Guide, Rev. B
W/WD drives
Term in a tor po wer
There are three possible terminator power (TP) configurations
for “W” model drives (see Figure 14). You will n ot norm ally n e ed
to change this option and can leave the drive configured as it
was shipped from the factory.
There are two po ssible termi nator power (TP) configurations for
“WD” model drives (see Figure 14).
Pin 1
“W” Models
J2
T
E
R
D
M
W
P
E
S
E
P
D
S
T
P
2
Pin 2
T
P
1
Term. Power from Drive (default)
Term. Power to SCSI Bus
Term. Power from SCSI Bus (position A)
Term. Power to SCSI Bus and Drive
“WD” Models
Term. Power to SCSI Bus (default)
Host adapter or other device provides
term. power to external terminator.
J6
J2 Jumper
(enlarged to
show detail)
Drive
Front
Pin 1
J2
SCSI I/O
Connector
DC Power
Connector
J1
Figure 14. Set ting term inator power jumpers
Cheetah 9 Installati on Guide, Rev. B 47
W/WD drives
Oth er app licab le jump er opti on s
Other option jumpers are a vailable as illu strated below.
J2
Reserved
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).
Pin 1
T
D
M
E
S
R
W
P
E
E
P
D
S
Pin 2
T
T
P
P
2
1
Write protect = On (disables writing).
Parity Check option
Enable parity check of SCSI bus (default).
Disable parity check.
J6
J2 Jumper
(enlarged to
Drive
Front
show detail)
Figure 15. Additional jumper options
Pin 1
J2
SCSI I/O
Connector
DC Power
Connector
J1
48 Cheetah 9 Installation Guide, Rev. B
WC/DC drives
WC/DC d rive s sectio nSettin g the SCSI ID jumpe rs
The SCSI ID for “WC” and “DC” model drives is normally set
over the SCSI bus by th e host system using connector contacts
39 (ID0), 40 (ID2), 79 (ID1), and 80 (ID3).
Term i na tin g th e dri ve
“WC” and “ DC” model dr ives do not ha ve internal terminators or
any other way of adding internal termination to the drive. You
must provide exter n al termination t o these dr ives w hen termination is required.
Cheetah 9 Installati on Guide, Rev. B 49
WC/DC drives
Ap plica bl e jum p er op tio ns
Option jumpers are available as illustrated below.
Pin 1
J2
R
R
R
R
E
D
M
W
P
E
E
E
Delay Motor Start option
The host system has complete
control over motor start functions. Do
not install a jumper on these pins.
Enable Motor Start option
The host system has complete
control over motor start functions. Do
not install a jumper on these pins.
S
S
E
P
D
S
S
S
Write Protect option
Write protect = Off
(enables writing – default)
Write protect = On
(disables writing)
Parity Check option
Enable parity check of SCSI bus
(default).
Disable parity check.
J6
Drive
Front
J2
SCSI I/O
Connector
J1
J2 Jumper Type
(enlarged to
show detail)
Figure 16. Jumper options
DC Power
Connector
50 Cheetah 9 Installation Guide, Rev. B
All drives
All drive s (LED co nn ectio ns)Drive Acti ve indi cator
The drive Active LED indicator connections are shown below.
Jumper Plug
(enlarged to
show detail)
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.
J2
J6
Pin 1
Pin 1
End
J6
CATH
Note: On some LEDs the flat
side of indicator is cathode.
Figure 17. Drive Active LED i ndicator connections
Seag ate Techno logy, Inc.
920 Disc Dri ve, Scotts Valley, CA 95066-4544, USA
Publicatio n Number: 83329160, Rev. B, Printed in USA
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