••••••••••••••••••••••••••
Elite 23
••••••••••••••••••••••••••
Disc Drive
••••••••••••••••••••••••••
ST423451N/W/WD
••••••••••••••••••••••••••
••••••••••••••••••••••••••
Installation Guide
••••••••••••••••••••••••••
Contents
Preface ........................................................................................1
Electrostatic discharge protection....... .................................. .......1
Important safety information and precautions. ...................... .......2
Wichtige Sicherheitshinweise ......................................................4
European Union Compliance.......................................................6
Technical support services..........................................................8
General description....................................................................12
Initial setup information............................ ..................................16
Kühlung des Systems................................................................25
Installation des Laufwerkes
und Anschluß der Kabel..........................................................27
N drives section.........................................................................34
W/WD drives section .................................................................38
All drives ....................................................................................42
©1996 Seagate Technology, Inc. All rights reserved
Publication Number: 83329130, Rev. A
September 1996
Seagate, Seagate Technology, and the Seagate logo are regis-
tered trademarks of Seagate Technology, Inc. Elite, SeaFAX,
SeaFONE, SeaNET, SeaTDD, and SeaBOARD are either trademarks or registered trademarks of Seagate Technology, Inc. All
other trademarks or registered trademarks are the propery of
their respective owners.
No part of this publication may be reproduced in any form without
written permission from Seagate Technology, Inc.
Elite 23 Installation Guide, Rev. A 1
Preface
This manual contains information for users of the Seagate®
ST423451 Elite 23 SCSI disc drives. It provides support services, performance specifications, and initial setup inform ation.
Additional information is available in the
(part number 83329140). Contact your Seagate sales representative if you need to order this publication.
Electrostatic disch arge protecti 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 electricity.
Electrostatic damage to electronic devices may be caused by
the direct discharge of a charged conductor or by exposure to
the static fields surrounding charged objects. To avoid damaging
drive electronic assemblies, observe the following precautions
when installing or servicing the drive:
• Ground yourself to the drive whenever the drive electronics
are or will be exposed. Connect yourself to ground with a wrist
strap (Seagate part number 12263496). Connection may be
made to any grounded metal assembly. As a general rule,
remember that you and the drive electronics must all be
grounded to avoid potentially damaging static discharges.
Elite 23 Product Manual
2 Elite 23 Installation Guide, Rev. A
• Turn off the power before removing or installin g the DC power
cable.
• Do not remove any circuit boards from the drive.
• Never use an ohmmeter on any circuit boards.
• When installing th e drive on a carrier or t ray, discharge the
carrier or tray prior to inserting it into the system.
Important 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 followed
to minimize or eliminate the risk of personal injury. The warnings
point out conditions or practices that may endanger you or others. The cautions point out conditions or practices that may damage the unit, possibly making it unsafe for use.
Always observe the following warnings and precautions:
• Follow all cautions and warnings in the procedures.
• Use sound safety practices when operating, installing, or
removing the unit.
• Use caution when troubleshooting a unit that has voltages
present. Turn off power to the unit before removing it.
• Ensure that the internal temperature of the rack or cabinet
does not exceed the limits defined for the drive 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.
Elite 23 Installation Guide, Rev. A 3
• Follow the precautions listed above in “Electrostatic discharge
protection.”
• Do not remove any circuit boards from the drive. Return the
entire drive for depot repair if any circuit board is defective.
Removal of circuit boards by personnel not performing depot
repair will damage components and may void the warranty.
• 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 is d esigned to be installe d and op erated 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 design. Safety agencies conditionally certi fy component
assemblies, such as the Elite disc drive, based on their final
acceptability in the end-use product. The subsystem designers
are responsible for meeting these conditions of acceptability in
obtaining safety-regulatory agency compliance in their end-use
products and for certifying where required by law. A necessary
part of meeting safety requirements is the provision for overcurrent protection on drive SELV supply volta ges.
This unit is a component part and as such is not meant to comply
with FCC or similar national requirements as a stand-alone unit.
Engineering radiated emissions test results are available
4 Elite 23 Installation Guide, Rev. A
through the Seagate Safety Department to assist the subsystem
designer.
Wichtige Sicherheitshinweise
Vorsicht. Beim Testen des Laufwerks auf dem Prüftisch ist
Fremdbelüftung vorzusehen, um eine ausreichende Kühlung der
Laufwerkkomponenten sicherzustellen.
Verwenden Sie geeignete Sicherheits- um den sicheren, zuverlässigen Betrieb dieser Einheit zu gewährleisten.
Die Verfahren in diesem Handbuch und die Aufkleber auf de m
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 allumfassend! Es ist
uns einfach nicht möglich, alle Wartungsmethoden oder die
eventuellen Risiken jeder Methode zu kennen, zu beurteilen und
Sie entsprechend zu beraten. Aus 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 noch die Leistung der Einheit gefährdet.
Beachten Sie in jedem Fall die folgenden Warn-und Vorsichtshinweise:
Elite 23 Installation Guide, Rev. A 5
• Beachten Sie alle Warn- und Vorsichtshinweise in diesem
Handbuch.
• Treffen Sie beim Betrieb, bei der Installation oder bei der
Entfernung der Einheit angemessene Sicherheitsvorkehrungen.
• Wenn eine Einheit unter Spannung steht, gehen Sie bei der
Fehlerdiagnose besonders vorsichtig vor. Schalten Sie die
Einheit aus, bevor Sie mit den In stallations-und Entfernungsarbeiten beginnen.
• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse
montiert ist, sorgen Sie dafür, daß die Temperatur im Inneren
des Gestells oder Gehäuses die für das Laufwerk vorgegebenen Grenzwerte nicht übersteigt. Wenn Einheiten vertikal
übereinander betestigt werden, achten Sie besonders auf den
oberen Stapelbereich, da dort die Temperatur gewöhnlich am
höchsten ist.
• Befolgen Sie die oben unter “Electrostatic Discharge Protec-
tion” angegebenen Sicherheitsmaßnahmen.
• Nehmen Sie keine Platinen aus dem Laufwerkgehäuse. Wenn
eine Platine defekt ist, muß das gesamte Laufwerk zur Reparatur eingeschickt werden. Die Herausnahme von Platinen
durch andere Personen als die für die wer kseitige 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-
6 Elite 23 Installation Guide, Rev. A
digen hat eine Beschädigung der Komponenten und
Erlöschen des Garantieanspruchs zur Folge.
Als Teilkomponente ist dieses Laufwerk für die Inst allation un d
den Betrieb in Übereinstimmung mit UL 1950, EN60950, CSA
C22.2 950-M89 und VDE0805 vorgesehen.
Seagate ist ständig bemüht, die Zulassungsfähigkeit von
Seagate-P rodukten im Rahmen der gegenwä rtig gelten den
Standards zu gewährleisten. Zu den typischen Anwendungen
dieser Festplattenwerke zählen Systemeinbau durch den
Kunden un d die Ko nstruk tion von Unt ersystemen. Sicherheitsbehörden gewähren eine bedingte Zulassung für Komponenten
wie das Elite-Fe stplattenl aufwer k vorbehaltlich d er endgül tigen
Zulasssung im Endprodukt. Designer von Untersystemen sind
dafür verantwortlich, die Voraussetzungen für die Einhaltung
sicherheits- oder aufsichtsbehördlicher Vorschriften in ihren
Endprodukten und - falls gesetzlich vorgeschrieben - f ür die
Zulassung zu schaffen. Eine Grundvoraussetzung zur Einhaltung der Sicherheitsanforderungen ist die Bereitstellung eines
Überlastschutzes für die SELV-Versorgungsspannungen des
Laufwerks.
Dieses Gerät ist ei ne Baugruppe und unt erliegt als solche nicht
den Anforderungen der FCC oder ähnlicher nationaler Behörden
für eigenstä ndige G eräte. T echnische Te sterge bnisse z u elektromagnetische Strahlung sind für Designer von Unt ersystemen
auf Anfrage von der Seagate-Sicherheitsabteilung erhältlich.
European Uni on Compl i ance
If this model has the CE Marking, it complies with the European
Union requirements of the Electromagnetic Compatibility Di rec-
Elite 23 Installation Guide, Rev. A 7
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.
Seagate uses an independent laboratory to confirm c ompliance
to the above directives. The drive was tested in a representative
system for typical applications. The sele cted system represents
the most popular characteristics for test platforms. The system
configurations include:
• 486, Pentium, and PowerPC Microprocessors
• 3.5-inch Floppy Disc Drive
• Keyboard
• Monitor/Display
Although the test system with this Seagate model complies to
the directives, we cannot guarantee that all systems will comply.
The computer manufacturer or system integrator shall confirm
EMC compliance and provide CE Marking for their product.
8 Elite 23 Installation Guide, Rev. A
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 conflicts and other technical issues. If
you need additional assistance with your Seagate drive or other
Seagate products, use one of the Seagate technical support services listed below.
SeaFONE at 1-800-SEAGATE (1-800-732-4283)
Seagate’s 800 number allows toll-fre e access to automated selfhelp services, providing answers to commonly-asked questions,
troubleshooting tips, and specifications for disc drives and ta pe
drives. This service is available 24 hours daily and requires a
touchtone phone. If you need to speak to a technical support
engineer, use this number to determine the correct access number to dial. (International callers may also reach this automated
self-help service by dialing 408-456-4496).
Seagate Techno logy On line serv ice s
Using a modem, you can obtain troubleshooting tips, free utility
programs, drive specifications and jumper settings for Seagate’s
entire product line. You can also download software for installing
and analyzing your drive.
SeaNET
Seagate’s Intern et connections—you can obtain technical information on Seagate drives, Seagate software, and much more
over the Internet from Seagate’s World Wid e Web home page
(http://www.seagate.com) or Seagate’s ftp server (ftp://ftp.
seagate.com).
Elite 23 Installation Guide, Rev. A 9
SeaBOARD
SeaBOARD is a computer bulletin board system that contains
information about Seagate Technology disc and tape drive products and is available 24 hours daily. Set your communications
software to ei ght data bits, no parity, and one sto p bit (8-N-1).
SeaBOARD phone numbers are listed in the following table.
BBS Location Modem number
United States Disc: 408-434-1081;
Tape: 408-456-4415
England 44-1628-478011
France 33 1-48 25 35 95
Germany 49-89-140-9331
Singapore 65-292-6973
Thailand 662-531-8111
Australia 61-2-9756-2359
Taiwan 886-2-719-6075
Seagate Technology Forum on CompuServe
Online technical support for Seagate products is available on
CompuServe. To access our technical support forum, type
seagate
SeaBOARD. In addition, you can type questions or browse
through previous questions and answers on the forum messages.
. This forum provides information similar to that found on
go
10 Elite 23 Installation Guide, Rev. A
Seagate Techno logy FAX servi ces
SeaFAX
You can use a touch-tone telephone to access Seagate’s automated FAX system to receive technical support information by
return FAX. This service is a vailable 24 hours daily.
Location Telephone number
United States 1-800-SEAGATE or 408-456-4496
England 44-1628-894084
Australia 61-2-9756-5170
Seagate technical support FAX
You can FAX questions or comments to technical support specialists 24 hours daily. Responses are sent during business
hours.
Location Fax number
United States 408-944-9120 (8:00
Pacific time, M–F)
England 44-1628-894089
France 33 1-48 25 28 61; 33 1-46 04 42 50
(9:00
A.M.–6:00 P.M., M–F)
Germany 49-89-149-8916-6
Australia 61-2-9725-4052
Singapore 65-293-4722
Hong Kong 852-2689-7173
Taiwan 886-2-715-2923
Korea 82-2-556-7294/4251
A.M.–5:00 P.M.
Elite 23 Installation Guide, Rev. A 11
Seagate technical support line
You can talk to a technical support specialist during business
hours Monday through Friday for one-on-one technical help.
Before calling, note your system confi guration and drive model
number (ST
xxxx
). There are several technical support phone
numbers available for various Seagate products.
Location Telephone number
United States Please dial 1-800-SEAGATE for the
specific product telephone number.
(6:00
A.M.–5:00 P.M., M–F)
England 44-1628-894083
France 33 1-41 86 10 86 (9:30
12:30
P.M., 2:00 P.M. –5:00 P.M., M–F)
A.M.–
Germany Disc: 49-89-140-9332;
Tape: 49-89-140-9333
Australia 61-2-9725-3366
Singapore 65-290-3998
Hong Kong 852-2368 9918
Taiwan 886-2-514-2237
Korea 82-2-556-8241
SeaTDD 408-944-9121
Using a telecommunications device for the deaf (TDD), you can
send questions or comments 24 hours daily and exchange messages with a technical support specialist between 6:00
5:00
P.M. (Pacific time) Monday through Friday.
A.M. and
12 Elite 23 Installation Guide, Rev. A
General description
Elite 23 SCSI disc drives are high-speed, random-access digitaldata storage devices.
The drive i s a componen t for installation in an enclos ure
designed for the drive. This is often a rack within the system or
an external enclosure designed to hous e one or more disc drives
or other peripheral units. In either case, the disc drive must
receive adequate cooling (refer to “Providing ad equate cooling” )
and it must be sufficiently grounded and shielded from emissions. The
contains guidelines for a properly designed enclosure.
Elite 23 Product Manual
(part number 83329140)
Figure 1. Elite 23 disc drive
(N model shown)
Elite 23 Installation Guide, Rev. A 13
Table 1: Drive characteristics
Interface UltraSCSI
1
Capacity
Unformatted 29.6 Gbytes
Formatted
2
23.4 Gbytes
Recording
Cylinders (user) 6,880
Read/write data heads 28
Servo heads Embedded
Seek time (typical)
3
Average read 13.2 msec
Average write 14.2 msec
Disc rotation
r/min 5,400 +
0.5%
Average latency 5.55 msec
Internal transfer rate 85.9 to 123
(Mbits/sec, variable with zone)
Max sync. SCSI transfer rate
N 20 Mbytes/sec
W/WD 40 Mbytes/sec
Multi-segmented cache 2,048 Kbytes
1
Can also be operated according to SCSI-1 and SCSI-2 proto-
cols.
2
Standard factory units are f ormatted as follows:
512 data bytes per sector
6 cylinders per region
82 spares per region
3
Not including on-board controller overhead.
14 Elite 23 Installation Guide, Rev. A
Table 2: DC power requirements
Single-ended Differential
Voltage regulation
8,10
5
+5V
± 5%
+12V
± 5%
8
2
+5V
± 5%
8,10
+12V
± 5%
Amps
Maximum starting current
Peak DC
Delayed motor start (max)
Peak operating current
Typical DC
Maximum (peak)
1
Measured with an average reading DC ammeter. Instanta-
3, 6, 9
1
1.0 4.8 1.05 4.8
1, 4
.85 .1 .85 .1
7
.98
1.1
1.6
2.8
1.2
1.95
1.6
2.8
neous +12V current peaks will exceed these values.
2
A –10% tolerance is permissible during initial start of the spin-
dle but must return to ±5% before reaching 5400 r/min. The
±5% must be maintained after the drive signifies that its
power-up sequence has been completed and that the drive is
able to accept selection by the host initiator.
3
See the +12V current profile in the
Elite 23 Product Manual
(publication number 83329140).
4
This condition occurs when the Motor Start option is enabled
and the drive has not yet received a Start Motor command.
5
See “Conducted noise immunity” in the
ual.
The specified voltage tolerance is inclusive of ripple,
Elite 23 Product Man-
noise, and transient response.
8
2
Elite 23 Installation Guide, Rev. A 15
6
At power-up, the motor current regulator limits the +12V cur-
rent to an average value of less than 4.8A, although instanta-
neous 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 pr ovided to multiple dri ves from a common
supply, carefully consider individual-drive power requirements.
Where multiple units are powered on simult aneously, be sure
the peak starting current is available to each device.
10
No terminator power. See 11.7.3.4 in the
Elite 23 Product
Manual.
Table 3: Dimensions of the drive
Typical Maximum
inches mm inches mm
Height 3.25 82.6 3.26 83.0
Width 5.75 146.1 5.76 146.3
Depth 8.0 203.0 8.01 203.5
Weight 7.0 pounds (15.5 kilograms)
16 Elite 23 Installation Guide, Rev. A
Initial setup information
The general information beginning on this page applies to all of
the Elite 23 drive models. After reading the general information
topics, refer to the appropriate drive-specific section listed below
for additional information about configuring and installing your
particular model.
Drive models Page
ST423451N 34
ST423451W ST423451WD 3 8
All drives (LED indicator connections) 42
General informa tion
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
Elite 23 Installation Guide, Rev. A 17
SCSI ID jumpers
Each device on the SCSI chain must h ave 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 prior ity in an 8-bit I/O system. ID8 is
lowest priority in a 16-bit I/O system. The lower priority SCSI IDs
are normally used for other SCSI devices such as this Elite disc
drive.
Note. Most SCSI controllers (host adapters) allow you to skip a
SCSI ID. For example, you can have ID0, ID1, and ID3
(skipping ID2). Other controll ers do not allow this so be
sure to refer to your system or controller user’s manual
for details about its requirements for proper SCSI device
installati 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 Elite 23 disc dr ives are factor y set with th e SCSI ID set at
0. To change the SCSI ID, refer to the appropriate drive section
for your model.
If, after completing the install ation process, the dr ive’s LED does
not show on/off activity when the host is trying to comm unicate
with the drive, a duplicate SCSI ID may be the problem. If this is
18 Elite 23 Installation Guide, Rev. A
the case, change the ID so that each d evice on the SCSI chain
has its own unique ID. Also check your system or controller
user’s manual to ensure that you have not violated its SCSI ID
numbering recommendations.
Drive terminati on
If you are installing a Elite 23 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 th e other end
(both are terminated). The bottom example shows two additional
SCSI devices connected externally. This means the SCSI controller is no longer on the end of the SCSI chain and should not
be terminated.
Note. Some controllers prefer to remain terminated even if they
are in the middle of the chain. Also, some controllers treat
the internal and external chains as separate logical
buses. This means you may need to terminate bot h 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.
Elite 23 Installation Guide, Rev. A 19
For information about how to terminate your drive, refer to the
appropriate drive-specific section.
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
Terminator power
You usually will not need to change this option and can normally
leave the drive configured as it was shipped from the factory. For
information about how to change the terminator power option on
your drive, refer to the appropriate drive-specific section.
I/O circuits and data path widths
• WD models use differ ential I/O circuit s. You cannot mix these
models with single-ended models (N, W) on the same SCSI
bus. The circuits are incompatible wi th each other.
• W and WD, models have a “wide” (16-bit) SCSI data bus
rather 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.
20 Elite 23 Installation Guide, Rev. A
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 Mbytes/sec I/O data transfer rates.
Table 4: Cable characteristics for single-ended circuits
I/O transfer
rate
Maximum number of
devices on line
Maximum cable
length allowed
5 Mbytes/s 8 (reg. SCSI bus) 6 meters (19.7 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.
Elite 23 Installation Guide, Rev. A 21
Figure 3a. Fifty-pin I/O connection t o drive
Figure 3b. Sixty-eight pin connection to drive
22 Elite 23 Installation Guide, Rev. A
“N” Model
Drive
*SCSI ID X
SCSI ID 1
(or last drive)
SCSI ID 0
Additional
SCSI devices
*“X” means up to ID6 or the
maximum allowable number
of devices on the SCSI bus.
See Table 1.
Pin 1
(check your adapter
for Pin 1 location)
SCSI ID 7
Host Adapter
PCB
Figure 3c. Multiple drive connection to host adapter
Elite 23 Installation Guide, Rev. A 23
SCSI ID 1
*SCSI ID X
(or last drive)
SCSI ID 0
“W” Model
Drive
Note: Do not mix
“W” and “WD”
model drives on
the daisy chain.
Additional
SCSI devices
*“X” means up to ID15 or the
maximum allowable number
of devices on the SCSI bus.
See Table 1.
Pin 1
(check your adapter
for Pin 1 location)
SCSI ID 7
Host
Adapter
PCB
“WD” Model
Drive
Terminator
Module
Figure 3d. Multiple-drive connection t o host adapter
24 Elite 23 Installation Guide, Rev. A
Providin g adequ ate cool ing
The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperature is 50°C.
The drive’s product manual (83329140) describes how to evaluate the air-flow design. The evaluation consists of e nsuring that
the case temperature of certain critical components remains
within acceptable limits during drive operation.
We recommend orienting the drive or directing the air flow in a
way that creates the l east 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 directed from front to back, back to front, or side to side.
Elite 23 Installation Guide, Rev. A 25
Kühlung des S ystem s
Die Gehäusekonstruktion m uß eine ausr eichende Kühlung d es
Laufwerk es gewährl eisten . Die Umge bungste mperatur darf
maximal 50°C betragen.
Die Produkthandbuch Elite 23 (Dokument 83329140) enthalten
Anweisungen zur Beurteilung der Luftstromkonstruktion. Die
Beurteilung muß sicherstellen, daß sich die Gehäusetemperatur
bestimmter kritischer Komponenten bei Laufwerkbetrieb innerhalb zugelassener Grenzen hält.
Wir empfehlen, das Laufwerk so zu orientieren oder den Luftstrom so zu lenke n, daß der gering ste Luftstrom widerstand
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 Laufwerk
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 Luftstromverlauf wird durch die Lüfter gesteuert, die entweder Luft einblasen oder abziehen. Generell kann der Luftstrom entweder von
vorne nach hinten oder von hinten nach vorne verlaufen.
26 Elite 23 Installation Guide, Rev. A
.
Above unit
Über der Einheit
Under unit
Unter 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 umgekehrter
Richtung (von hinten nach vorne)
Above unit
Über der Einheit
Note. Air flows in the direction shown or
in reverse direction (side to side)
Hinweis. Luftstrom in der angezeigten Richtung oder in
umgekehrter Richtung (von Seite zu Seite)
Under unit
Unter der Einheit
Figure 4. Suggested air flow
Abbildung 4. Empfohlener Luftstromverl auf
Elite 23 Installation Guide, Rev. A 27
Mounti ng the drive and co nne ctin g cable s
Do not touch the connector pins or any components on the control board without observing static-discharge precautions.
Always handle the drive by the frame only.
The drive may be mounted in any orientati on (horizontall y, vertically, 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
HDA and there are four mounting holes in the bottom of the
HDA.
The maximum length that the screws should extend into the
HDA mounting holes is 0.17 inch (4.318 mm), measured
from the outer surface of the HDA. 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.
Installatio 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 Rahmen
an.
Das Laufwerk kann in beliebiger Orientierung (horizontal, vertikal oder schräg) installiert w erden; jedoch muß dafür gesorgt
werden, daß ein ausreichender Luftstrom zur Kühlung des Laufwerkes vorhanden ist.
28 Elite 23 Installation Guide, Rev. A
1. Befestigen Sie das Laufwerk mit vier 6-32-UNC-Schrauben
am Gehäuse des Host- Systems. Die beiden Se iten des
Laufwerkes sind mit jeweils zwei Befestigungslöchern
versehen, die Unterseite des Laufwerkes weist vier weitere
Befestigungslöcher auf.
Gemessen von der Außenfläch e des Gehäuses dürfen die
Schrauben maximal 4,318 mm in die Befestigungslöcher
des Gehüuses hineinragen. Die S chrauben müssen gleichmäßig, jedoch nicht zu fest, angezogen werden. Wenn sich
eine Schraube nicht ohne Widerstand einschrauben läßt,
sind die Gewinde ni cht korrekt aneinander ausger ichtet. In
diesem Fall die Schraube nicht in das Gewindeloch
forcieren, sondern die Schraube herausnehmen und erneut
in das Gewindeloch einführen.
2. Verify that all connections between the drive and the host
system are correctly installed.
2. Prüfen Sie, ob alle Verbindungen zwischen dem Laufwerk
und dem Host-System korrekt hergestellt sind.
3. Verify that you have correctly installed jumpers.
3. Stellen Sie sicher, daß die Kennungsbrücken installiert sind.
4. Connect the SCSI cable into the drive’s SCSI connector.
Take care not to 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 the SCSI connector. The output of a power
supply must meet SELV (safety extra low voltage) as
Elite 23 Installation Guide, Rev. A 29
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 Laufw erkes an. Das Kabel d arf nicht gedehnt ode r
gedrückt werden und es darf den Luftstro m zur K ühlung des
Systems nicht behindern.
Das Laufwerk wird über einen 4-poligen, neben dem SCSIAnschluß befestigten Steckverbinder mit Gleichs trom versorgt. Der Ausgang eines Netzteils muß SELV (safety extra
low voltage) na ch IEC 950 entspr echen. Abbildung 5 zeigt
die Steckerbelegung für den Gleichstromanschluß. Zum
Anschluß des Gleichstromkabels an das Laufwerk das
Kabelende in den Gleichstromanschluß des Laufwerkes
stecken.
Pin
Pin
1
2
3
4
Power
+12V
+12V return
+ 5V return
+ 5V
Gleichstrom
1
+12 V
2
+12 V Rückleitung
3
+ 5 V Rückleitung
4
+ 5 V
4321
Figure 5. DC p ower connector
Abbildung 5. Gleichstromanschluß
30 Elite 23 Installation Guide, Rev. A
Note. Signal ground on the printed circuit board assembly
(PCB) and the head and disc assembly (HDA) are connected together in this drive and you cannot separate
them. Ensure the equipment in which you have mounted
the drive is connected directly to the HDA. Maximizing
the conductive contact area between HDA ground and
system ground may reduce radiated emissions.
If you do not want the system chassis to be connected to
the HDA/PCB ground, you must provide a nonconductive
(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 Sie das Laufwerk
eingebaut haben, ist ohne elektrisch isolierende
Stoßdämpfer direkt an die HDA und PCB angeschlossen.
Die elektromagnetische Strahlung kann reduziert werden, indem Sie eine möglichst große leitende Kontakfläche zwischen der HDA-Erdung und der Systemerdung
vorsehen.
Wenn Sie das Systemgehäuse nicht an die HDA/ PCBErdung anschließen wollen, müssen S ie das Laufwerk
auf nichtleitende Weise (galvanisch isoliert) im Host-System einbauen. Die daraus u.U. resultierende verstärkte
Elite 23 Installation Guide, Rev. A 31
elektromagnetische Strahlung fällt in den Zuständigkeitsbereich des Systemdesigners.
5. Replace the host system’s cover.
5. Setzen Sie das Gehäuseoberteil des Host-Systems wieder
auf.
32 Elite 23 Installation Guide, Rev. A
[3]
L
F
JK
H
D
G
[1]
Notes:
Mounting holes two on each side,
[1]
6-32 UNC. Max screw length into
side of HDA 0.17 in. (4.318 mm).
Mounting holes four on bottom,
[2]
6-32 UNC. Max screw length into
bottom of drive 0.18 in. (4.572 mm).
Power and interface connections.
[3]
Decorative front panel.
[4]
A
E
[2]
C
B
[4]
Inches Millimeters
0.010
8.000
A
B
C
D
E
F
G
H
J
K
L
5.750
2.875
2.950
3.120
0.860
5.500
0.125
3.120
2.950
3.240
±
0.010
±
0.010
±
0.020
±
0.010
±
0.005
±
0.010
±
0.010
±
0.010
±
0.020
±
0.020
±
Figure 6. Mounting configuration dimensions
203.20
145.05
73.02
54.93
79.25
21.84
139.70
2.17
79.24
74.93
82.30
.25
±
.25
±
.25
±
.50
±
.25
±
.13
±
.25
±
.25
±
.25
±
.50
±
.50
±
Elite 23 Installation Guide, Rev. A 33
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 drive
that previously has been used to store data, unless
your intention is to erase all user data.
Note. Seagate is not responsible for lost user data.
1. Turn on DC power.
2. Boot the system from a system floppy disc or from a previously installed hard disc drive if there is one.
3. Format the disc drive. Elite 23 disc dri ves 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
Systems 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).
.” Use FDISK.EXE and FORMAT.EXE.
Zero,” “None,”
or “
No
34 Elite 23 Installation Guide, Rev. A
N drives
N/ND drives sectionSetting the SCSI ID jumpe rs
Use the J4A connector to set the SCSI ID (see Figure 7) on
model ST423451N. To change the SCSI ID, install jumpers on
the appropriate pins as shown in the illustration.
Pin 1
J4A
J01
J4A
Pin 1
SCSI ID = 0 (default)
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
Figure 7. Setting the SCSI ID on N mo dels
J4B
Pin 1
Elite 23 Installation Guide, Rev. A 35
N drives
Terminating the drive
ST423451N 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 TE jumper from pins 19 and 20 of connector J4A (see Figure
7). If you install the drive on t he end of the SCSI bus, enable ter-
mination by installing a jumper on pins 19 and 20 of connector
J4A.
Pin 1
J4A
Pin 1
Terminator Enabled (TE)
Terminator Disabled (TE)
Figure 8. Terminating the drive
J4A
J01
J4B
Pin 1
Pin 19
36 Elite 23 Installation Guide, Rev. A
N drives
Terminator power
There are three possible terminator power configurations for
ST423451N 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 2
Pin 1
J01
Terminator Power Option (TP)
Internal terminator power source.
External terminator power source.
Internal terminator and drive power to I/O.
Figure 9. Setting term inator power jumpers on
N models
Pin 4
Pin 3
J01
Pin 2
Pin 1
Pos. B
Pos. A
Pos. 2
Pos. 1
Pin 4
Pin 3
Elite 23 Installation Guide, Rev. A 37
N drives
Other applicab le jump er opti on s
Several other jumper options are available as illustrated in Figure 10.
Pin 1
J4B
Spinup Delay Option (DS)
Immediate spinup (if the Start Command
option jumper is disconnected)
Spinup delay equal to the SCSI Bus ID
multiplied by 12 seconds (if the Start
Command option jumper is disconnected).
Start Command Option (ME)
Start spindle according to the Spinup
Delay option jumper.
Start spindle after the SCSI Bus sends
a Start Unit command.
SCSI Bus Parity Check (PD)
Check the parity of data bytes read from
the SCSI Bus.
Ignore parity check.
Reserved
Pin 1
Figure 10. Additional jumper options
J4A
J01
J4B
Pin 1
38 Elite 23 Installation Guide, Rev. A
W/WD drives
W/WD drives sectionSetting the SCSI ID jumpe rs
Use the J4A jumper block to set the SCSI ID (Figure 11) on models ST423451W/WD. To change the SCSI ID, install jumpers on
the appropriate pins as shown in the illustration.
J4A
Pin 1
SCSI ID = 0 (default)
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
SCSI ID = 8*
SCSI ID = 9*
SCSI ID = Ah (10)*
SCSI ID = Bh (11)*
SCSI ID = Ch (12)*
SCSI ID = Dh (13)*
SCSI ID = Eh (14)*
SCSI ID = Fh (15)*
Pin 15
Pin 1
Connector
J6
SCSI I/O
DC Power
Connector
J4A
Figure 11. Set ting the SCSI ID on W/WD models
J01
J4B
Pin 1
Elite 23 Installation Guide, Rev. A 39
W/WD drives
Terminating the drive
ST423451W 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 TE jumper from pins 19 and 20 of connector J4A. If you
install the drive on the end of the SCSI bus, enable termination
by installing a jumper on pins 19 and 20 of connector J4A (see
Figure 12).
Note. Use active (ANSI SCSI-2 Alternative 2) terminators when
terminating the bus.
ST423451WD drives do not have internal terminators or any
other way of adding internal termination to the drive. You must
provide external differential termination to these drives when termination is required.
Pin 1
J4A
Pin 1
Terminator Enabled (TE)
Terminator Disabled (TE)
J4A
J01
J4B
Pin 1
Pin 19
Figure 12. Terminating the drive (ST423451W shown)
40 Elite 23 Installation Guide, Rev. A
W/WD drives
Terminator power
There are three possible terminator power configurations for
ST423451W drives (see Figure 13). You will not norm ally need
to change this option and can leave the drive configured as it
was shipped from the factory.
There are two possible terminator power configurations for
ST423451WD drives (see Figure 13).
Pin 2
Pin 1
Pin 4
Pin 3
J01
Pos. B
Pos. A
Pos. 2
Pos. 1
Terminator Power Option (TP)
Pin 2
J01
Pin 1
Internal terminator power source.
External terminator power source.
Internal terminator and drive power to I/O.
Figure 13. Set ting term inator power jumpers on
W models
Pin 4
Pin 3
Elite 23 Installation Guide, Rev. A 41
W/WD drives
Other applicab le jump er opti on s
Other option jumpers are available as illu strated below.
Pin 1
J4B
Spinup Delay Option (DS)
Immediate spinup (if the Start Command
option jumper is disconnected)
Spinup delay equal to the SCSI Bus ID
multiplied by 12 seconds (if the Start
Command option jumper is disconnected).
Start Command Option (ME)
Start spindle according to the Spinup
Delay option jumper.
Start spindle after the SCSI Bus sends
a Start Unit command.
SCSI Bus Parity Check (PD)
Check the parity of data bytes read from
the SCSI Bus.
Ignore parity check.
Reserved
Pin 1
Figure 14. Additional jumper options
J4A
J01
J4B
Pin 1
42 Elite 23 Installation Guide, Rev. A
All drives
Active, Ready, and Fault indicators
The Active, Ready, and Fault LED indicator connections are
shown below.
Pin 1
J4A
Pin 1
Reserved
Active LED Connector
Fault/Ready LED Connector
Terminator Enabled (TE)
Reserved
Note: On some LEDs the flat
side of indicator is cathode.
SCSI I/O
Connector
J4A
J6
DC Power
Connector
Pin 18
Pin 16
Pin 15 Pin 17
J01
Pin 1
CATH
CATH
CATH
J4B
Active
Fault
Ready
Figure 15. LED indicator connections for all drive models
Seagate Techno logy, Inc .
920 Disc Drive, Scotts Valley, CA 95066-4544, USA
Publication Number: 83329130, Rev. A, Printed in USA
Loading...