Elite Disc Drive
ST43401N/ND
ST43402ND
User’s Manual
ST43401N/ND, ST43402ND User’s Manual, Rev. B
iii
Preface
This manual contains information for users of Seagate® ST43401N/ND and
ST43402ND Elite™ disc drives. It provides instructions to all personnel who
operate the drive and to customer engineers who install and check out the
drive. Additional information is available in the reference manual (publication
83327730).
Electrostatic discharge protection
Caution. Removalofcircuitboardsbypersonnelnotperformingdepotrepair
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
dischargeofachargedconductor,orbyexposuretothestaticfieldssurround-
ing charged objects. To avoid damaging drive electronic assemblies, service
personnel must observe the following precautions when 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 power before removing or installing the DC power cable.
• Do not remove any circuit boards from the drive.
• Never use an ohmmeter on any circuit boards.
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ST43401N/ND, ST43402ND User’s Manual, Rev. B
Important safety information and precautions
Caution. Use forced-air ventilation when bench-testing the drive to ensure
proper cooling of drive components.
Usepropersafetyandrepairtechniquesforsafe,reliableoperationofthisunit.
Service should be done only by qualified persons. We recommend the
procedures in this manual as effective ways of servicing the unit. Some
procedures require the use of special tools. For proper maintenance and
safety, you must use these tools as recommended.
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
riskofpersonalinjury. Thewarningspointoutconditionsorpracticesthatmay
endanger you or others. The cautions point out conditions or practices that
may damage the unit, possibly making it unsafe for use.
You must also understand that these warnings and cautions are not exhaus-
tive. We cannot possibly know, evaluate, and advise you of all the ways in
whichmaintenancemightbeperformedorthepossibleriskofeachtechnique.
Consequently, we have not completed any such broad evaluation. If you use
anon-approvedprocedureortool,firstensurethatthemethodyouchoosewill
not risk either your safety or unit performance.
Always observe the following warnings and precautions:
• Perform all maintenance by following the procedures in this manual.
• Follow all cautions and warnings in the procedures.
• Use sound safety practices when operating or repairing the unit.
• Usecautionwhentroubleshootingaunitthathasvoltagespresent.Remove
power from the unit before servicing it.
• Wear safety shoes when removing or replacing heavy parts.
• Ensure that the internal temperature of the rack or cabinet will not exceed
the limits defined for the drive when the drive is mounted in an equipment
rack or cabinet. When units are stacked vertically, pay special attention to
the top where temperatures are usually highest.
• Follow the precautions listed under “Electrostatic discharge protection.”
ST43401N/ND and ST43402ND User’s Manual, Rev. B
v
• Do not remove any circuit boards from the drive chassis. 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.
• Do not remove the head and disc assembly (HDA) from the drive chassis.
Return the entire drive for depot repair if the HDA is defective.
• DonotattempttodisassembletheHDA.Itisnotfieldrepairable.Ifthesealed
HDA is opened by personnel not performing depot repair, this will damage
components and void the warranty.
• As a component, this drive is designed to be installed and operated in
accordancewithUL1950,IEC950,EN60950,CSAC22.2950,andVDE0805.
• Ensure that the power supply meets the specifications in this manual and
isdesignedtobeusedinaccordancewithUL1950,IEC950,EN60950,CSA
C22.2 950, 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 condi-
tionally certify 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 in certifying
whererequiredbylaw.Anecessarypartofmeetingsafetyrequirementsisthe
provision for overcurrent protection on drive SELV supply voltages.
This unit is a component part and as such is not meant to comply with FCC
or similar national requirements as a stand-alone unit. Engineering radiated
and conducted emissions test results are available through the Seagate
Safety Department to assist the subsystem designer.
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ST43401N/ND, ST43402ND User’s Manual, Rev. B
Wichtige Sicherheitshinweise
Vorsicht. Beim Testen des Laufwerks auf dem Prüftisch ist Fremdbelüftung
vorzusehen, um eine ausreichende Kühlung der Laufwerkkomponenten
sicherzustellen.
Verwenden Sie geeignete Sicherheits- und Reparaturverfahren, um den
sicheren,zuverlässigenBetriebdieserEinheitzugewährleisten.Reparaturen
dürfen nur von qualifiziertem Fachpersonal vorgenommen werden. Wir
empfehlen die Verfahren in diesem Handbuch als effektive Methoden zur
Wartung und Reparatur der Einheit. Einige Verfahren erfordern
Spezialwerkzeuge; diese müssen zur sachgemäßen Ausführung der
Wartungsarbeiten und aus Sicherheitsgründen den Empfehlungen
entsprechend verwendet werden.
DieVerfahrenindiesemHandbuchunddieAufkleberaufdemGerätenthalten
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,diedieEinheitbeschädigenkönnen,sodaßderenGebrauchmit
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
diesemGrundhabenwiraufeinederartigeumfassendeBeurteilungverzichtet.
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:
• Führen Sie alle Wartungsarbeiten entsprechend den Anweisungen in
diesem Handbuch aus.
• Beachten Sie alle Warn- und Vorsichtshinweise in diesem Handbuch.
• Treffen Sie beim Betrieb oder bei der Reparatur der Einheit angemessene
Sicherheitsvorkehrungen.
• WenneineEinheitunterSpannungsteht,gehenSiebeiderFehlerdiagnose
besonders vorsichtig vor. Schalten Sie die Einheit aus, bevor Sie mit den
Reparaturarbeitenbeginnen.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
vii
• TragenSieSicherheitsschuhe,wennSieschwereTeileaus-bzw.einbauen.
• Wenn das Laufwerk in einem Einbaugestell oder Gehäuse montiert ist,
sorgen Sie dafür, daß die Temperatur im Inneren des Gestells oder
GehäusesdiefürdasLaufwerkvorgegebenenGrenzwertenichtübersteigt.
Wenn Einheiten vertikal gestapelt werden, achten Sie besonders auf den
oberenStapelbereich, dadortdieTemperaturgewöhnlichamhöchstenist.
• Befolgen Sie die oben unter “Electrostatic Discharge Protection”
angegebenenSicherheitsmaßnahmen.
• 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
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.
• DieHDAistnichtvorOrtreparierbarunddarfnichtauseinandergenommen
werden!ÖffnenderversiegeltenHDAdurchanderePersonenalsdiefürdie
werkseitigeReparaturzuständigenhateineBeschädigungderKomponenten
und Erlöschen des Garantieanspruchs zur Folge.
• Als Teilkomponente ist dieses Laufwerk für die Installation und den Betrieb
in Übereinstimmung mit UL 1950, IEC950, EN60950, CSA C22.2 950 und
VDE0805 vorgesehen.
• Achten Sie darauf, daß Ihr Netzteil den technischen Daten in diesem
Handbuch entspricht und für den Betrieb in Übereinstimmung mit UL 1950,
IEC950, EN 60950, CSA C22.2 950 und VD0805 vorgesehen ist.
Seagateistständigbemüht,dieZulassungsfähigkeitvonSeagate-Produkten
im Rahmen der gegenwärtig geltenden Standards zu gewährleisten. Zu den
typischenAnwendungendieserFestplattenwerkezählenSystemeinbaudurch
den Kunden und die Konstruktion von Untersystemen. Sicherheitsbehörden
gewähren eine bedingte Zulassung für Komponenten wie das Elite-
FestplattenlaufwerkvorbehaltlichderendgültigenZulasssungimEndprodukt.
DesignervonUntersystemensinddafürverantwortlich,dieVoraussetzungen
für die Einhaltung sicherheits- oder aufsichtsbehördlicher Vorschriften in
ihren Endprodukten und - falls gesetzlich vorgeschrieben - für die Zulassung
zu schaffen. Eine Grundvoraussetzung zur Einhaltung der
Sicherheitsanforderungen ist die Bereitstellung eines Überlastschutzes auf
den SELV-Versorgungsspannungen des Laufwerks.
viii
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Dieses Gerät ist eine Baugruppe und unterliegt als solche nicht den
AnforderungenderFCCoderähnlichernationalerBehördenfüreigenständige.
Technische Testergebnisse zu Frequenz- und Elektrizitätsemissionen sind
für Designer von Untersystemen auf Anfrage von der Seagate-
Sicherheitsabteilungerhältlich.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
ix
Technical support services
Seagate Technology provides technical support literature and diagnostic
utilities to authorized distributors. Please contact your dealer for technical
support and installation troubleshooting. Product technical support is avail-
able for all Seagate products by calling the SeaFAX™, SeaFONE™,
SeaTDD™, or SeaBOARD™ services. These are toll calls if you dial from
outside of the number’s local dialing area.
SeaFAX:
USA (408) 438-2620; England 44-62-847-7080
Useatouch-tonetelephonetoaccessSeagate’sautomatedFAXsystemand
select technical support information by return FAX. This service is available
24 hours a day, 7 days a week.
SeaFONE: (408) 438-8222
Technical support specialists are available between 8:00 A.M. and 5:00 P.M.
PST, Monday through Friday. Recorded technical information for selected
Seagate products is accessible 24 hours a day, 7 days a week.
SeaTDD: (408) 438-5382
TDD is a telecommunication device for the deaf where two people can
communicate using a keyboard connected to the phone line. A TDD device is
required to access this service, which is available from 8:00A.M. to 5:00 P.M.
PST, Monday through Friday.
SeaBOARD:
The Seagate Technical Support Bulletin Board System (BBS) is available 24
hours a day, 7 days a week. A modem is required to access this service. The
communications software must be set for 8 data bits, no parity, and 1 stop bit
(8N1). All BBS numbers operate at 9600 baud max. With this service you can
access:
• Specifications and jumper configurations for Seagate products
• Reprints of Seagate documentation
• A directory of information and helpful utilities that you can download to your
own computer
x
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Telephone
number
Location
USA, Mexico, Latin America
England
Germany
Singapore
Australia
Canada
(408) 438-8771
44-62-847-8011
49-89-140-9331
65-292-6973
61-2-756-2359
(416) 856-5581
33-1-40-67-1034
82-2-556-7294
France
Korea
ST43401N/ND, ST43402ND User’s Manual, Rev. B
1
Section 1. General description
Seagate ST43401N/ND and ST43402ND Elite 3 disc drives are high speed,
random access digital data storage devices. They communicate with an
initiator using the fast and wide (16-bit) Small Computer System Interface
(SCSI-2). The ST43401N/ND disc drive is shown in Figure 1, and the
ST43402ND (dual port) disc drive is shown in Figure 2. Specifications for
these drives are listed in Table 1 following the figures.
Thedriveisacomponentforinstallationinanenclosuredesignedforthedrive.
The enclosure design must ensure adequate cooling for the drive, and it must
address the requirements for grounding and for shielding of emissions. The
reference manual (publication 83327730) presents guidelines for a properly
designed enclosure.
Power
Board
Control
Board
Optional
Bezel
Option Jumpers and
Spindle Sync
Connector
Option
Jumpers
Option
Jumpers
Option
Jumpers
Pin 1
I/O
Connector
Chassis
Head and Disc
Assembly (HDA)
DC Power
Connector
Figure 1. ST43401N/ND disc drives
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ST43401N/ND, ST43402ND User’s Manual, Rev. B
Power
Board
Control
Board
Optional
Bezel
Spindle Sync
Connector
Remote Operator
Panel Connector
I/O Board
Power
DC Power
Connector
Pin 1
Port B
I/O Connector
Chassis
Option
Head and Disc
Assembly (HDA)
Option
Jumpers
Jumpers
Port B
Terminator
Power
I/O
Board
Port A
I/O Connector
Port A
Terminator
Power
Figure 2. The ST43402ND disc drive
ST43401N/ND, ST43402ND User’s Manual, Rev. B
3
Table 1. Drive specifications
Characteristics Conditions
Specifications
Size
Dimensions
See “Space requirements”
in Section 2
Weight (drive only)
3.6 kg (8.0 lb)
Interface
Fast and wide (16-bit) SCSI-2
Recording
Total capacity (unformatted) 3,554,871,600 bytes
Bytes per track (unformatted)
Inner track
49,000 bytes
72,800 bytes
Outer track
Formatted capacity*
(256-byte sectors)
(512-byte sectors)
(1,024-byte sectors)
Number of discs
Recording heads
Servo heads
2,536,189,440 bytes
2,912,484,864 bytes
3,142,281,216 bytes
11
21
1
Physical heads per surface
1
Cylinders per head/disc assy 2,738
Cylinders available to user
Spare cylinders
2,735
1 (default/programmable)
System cylinders
1
Diagnostic cylinders
Spare sectors per cylinder
Modulation
1
9 (default/programmable)
RLL 1,7 code
* Excluding spare sectors, spare cylinders, diagnostic cylinders, and
system cylinders.
continued
4
ST43401N/ND, ST43402ND User’s Manual, Rev. B
continued from previous page
Characteristics
Conditions
Specifications
SCSI transfer rate, burst
20.0 Mbytes/sec max
Seek time (time required
to move heads to a different Typical average
track address—excluding
SCSI I/O overhead)
Typical full
23.5 msec
11.5 msec
1.7 msec
Typical one-track
Typical access times
Write Read
msec msec
Single track seek
Average seek
Maximum seek
1.7
11.5
23.5
0.9
10.5
22.5
Latency (time required
to reach a particular
track address after head
positioning is complete)
Average
(disc rotation
at 5,400 RPM)
5.55 msec
Maximum
11.17 msec
(disc rotation
at 5,373 RPM)
Start time**
Stop time
30 sec max
30 sec max
** Following the power sequence delay, once DC power is applied and
start conditions are present.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
5
Thedrivecontainsallthecircuitsandmechanicaldevicesnecessarytorecord
dataonandrecoveritfromitsdiscs.ThedriverequiresDCvoltageinputsfrom
an external power supply, which you must supply. The DC power cable is
available as an accessory.
TheST43401N/NDdrivesconsistofaheadanddiscassembly(HDA)withtwo
circuit boards, and the ST43402ND drive consists of an HDA and three circuit
boards. Each drive’s HDA and circuit boards are mounted on a common
chassis. The circuit boards contain the electronics required for drive opera-
tion. The HDA is a sealed unit containing the electromechanical components
used for data retrieval and storage . These components include the discs,
spindle, drive motor, actuator, heads, and preamplifiers.
The eleven discs provide the recording medium for the drive. These discs are
mounted on a spindle, and the spindle is coupled directly to the drive motor.
The drive motor rotates the discs at 5,400 RPM and produces a circulation of
air within the sealed HDA.
The built-in SCSI controller directs all drive functions, receives commands
from the initiator (host computer), interprets them, and then transfers the
necessarycommandstothedrive. Thecontrollerthereforeallowstheinitiator
to start an operation and then disconnect to service another device. Refer to
the reference manual for a description of interface functions.
All drive operations are related to data recovery and storage (normally
referredtoasreadingandwriting).Theactualreadingandwritingisperformed
byheadsthatarepositionedovertherotatingdiscs’recordingsurfaces.There
isoneheadforeachdatasurface.Theheadsarepositionedinsuchawaythat
data is written in concentric tracks around the disc surfaces (see Figure 3).
Before any read or write operation can be performed, the controller must
instruct the drive to position the heads over the desired cylinder (called
seeking)andusetheheadlocatedoverthesurface(headselection)wherethe
operation is to be performed.
The heads are mounted on the actuator, and the actuator moves the heads
over the rotating discs. There are 22 heads—a servo head to sense actuator
positioning, and 21 data heads used for data transfers to and from the discs.
The actuator has a voice coil that moves in a permanent magnetic field in
response to signals from the servo positioning circuitry. The voice coil moves
the heads in an arc across the rotating discs.
6
ST43401N/ND, ST43402ND User’s Manual, Rev. B
When the drive is not powered on, the heads rest on the disc surface in a
preassigned landing zone beyond the data zone. The actuator automatically
latches in this position at shutdown for moving or shipping protection. When
the drive is activated to bring the discs up to speed, the heads fly on a cushion
of air close to the disc surface.
After arriving at the data track and selecting a head, the controller locates the
portion of the track where the data is to be read or written. This is called track
orientation. Signals from the drive indicate the beginning of each track. The
controllerusesthesesignalstodeterminethepositionoftheheadonthetrack.
When the head is above the desired track location, the controller commands
the drive to actually read or write the data. During a read operation, the drive
retrieves data from the discs, processes it, and transmits it to the controller.
Duringawriteoperation,thedrivereceivesdatafromthecontroller,processes
it, and stores it on the discs.
The drive can recognize certain errors that may occur during its operation.
When an error is detected, it is indicated to the initiator by the SCSI controller.
Data recorded in
concentric tracks
Unit
Selection
Logic
Head
Selection
Logic
Heads
SCSI
Controller
Read/Write
Logic
Discs
I/0 Lines
Initiator
Seek
Logic
Track
Orientation
Logic
Error
Detection
Logic
Power Supply
Figure 3. Drive functional block diagram
ST43401N/ND, ST43402ND User’s Manual, Rev. B
7
Section 2. Installation/Abschnitt 2. Installation
The information contained in this section describes installation and initial
checkout of the drive.
Site requirements
The site requirements considered are environment, airflow, space, power,
grounding, and interface.
Voraussetzungen am Aufstellungsort
Zu den Voraussetzungen am Aufstellungsort gehören Umgebung,
Luftfluß, Raum, Strombedingungen, Erdung und Schnittstelle.
Environmental requirements
All environmental requirements for the drive are listed in Table 2.
Umgebungsbedingungen
Alle Umgebungbedingungen für das Laufwerk sind in der
nachstehenden Tabelle 2 aufgelistet.
8
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Table 2. Environmental requirements
Conditions
Specifications
Operating environment
Temperature
Range of 5°C to 50°C (41°F to 122°F) with a
maximum change of 20°C (36°F) per hour
Humidity
Range of 5% to 95% relative
A maximum wet bulb temperature of 26°C (79°F)
Barometric pressure
–305 m to 3,048 m (–1,000 ft to 10,000 ft)
104 kPa to 69 kPa (30 in Hg to 20 in Hg)
Non-operating environment (unpacked)
Temperature
Range of –40°C to 60°C (–40°F to 140°F) with a
maximum change of 20°C (36°F) per hour
Humidity
Range of 5% to 95% relative
A maximum wet bulb temperature of 26°C (79°F)
Barometric pressure
–305 m to 12,192 m (–1,000 ft to 40,000 ft)
104 kPa to 19 kPa (30 in Hg to 6 in Hg)
Transit and storage environment (packed)
Temperature
Range of –40°C to 60°C (–40°F to 140°F) with a
maximum change of 20°C (36°F) per hour
Humidity
Range of 5% to 95% relative
Barometric pressure
–305 m to 12,192 m (–1,000 ft to 40,000 ft)
104 kPa to 19 kPa (30 in Hg to 6 in Hg)
ST43401N/ND, ST43402ND User’s Manual, Rev. B
9
Tabelle 2. Umgebungsbedingungen des Laufwerkes
Bedingungen
Technische Daten
Betriebsumgebung
Temperatur
5°C bis 50°C mit einer maximalen
Schwankung von 20°C pro Stunde
Relative Luftfeuchtigkeit
5% bis 95%
Maximale Naßthermometertemperatur
von 26°C
Luftdruck
–305 m bis 3.048 m; 104 kPa bis 69 kPa
Umgebungsbedingungen bei Nichtbetrieb (unverpackt)
Temperatur
–40°C bis 60°C mit einer maximalen
Schwankung von 20°C pro Stunde
Relative Luftfeuchtigkeit
5% bis 95%
Maximale Naßthermometertemperatur
von 26°C
Luftdruck
–305 m bis 12.192 m; 104 kPa bis 19 kPa
Lager-/Transportbedingungen (verpackt)
Temperatur
–40°C bis 60°C mit einer maximalen
Schwankung von 20°C pro Stunde
Relative Luftfeuchtigkeit
Luftdruck
5% bis 95%
–305 m bis 12.192 m; 104 kPa bis 19 kPa
10
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Air-flow requirements
The enclosure design must ensure adequate cooling for the drive. Note that
the fan in the power supply cools only the power supply’s internal parts.
The drive’s product specification (document 64403603) describes how to
evaluatetheair-flowdesign.Theevaluationconsistsofensuringthatthecase
temperatures of certain critical components remain within acceptable limits
during drive operation.
We recommend orienting the drive or directing the air flow in a way that
creates the least amount of air-flow resistance while providing air flow
above the circuit boards and around the head and disc assembly (HDA).
Also, choose the shortest possible path between the air inlet and exit. This
minimizes the distance traveled by air that is heated by the drive and by
other nearby heat sources.
Figure 4 shows two design approaches with one or more fans used to
generate airflow. 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.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
11
Above unit
Under unit
Note. Air flows in the direction shown (front to back)
or in reverse direction (back to front)
Above unit
Under unit
Note. Air flows in the direction shown or
in reverse direction (side to side)
Figure 4. Suggested air flow/Empfohlener Luftstromverlauf
12
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Space requirements
The drive is designed to be mounted in one of the three orientations shown in
Figure 5. The drive may be mounted on its base or on either side. The
physical dimensions of the drive are shown in Figure 6. The drive weighs
3.6 kg (8.0 lb).
For details about designing an enclosure to match the drive mounting
dimensions, refer to the drive’s product specification.
Räumliche Anforderungen
Das Laufwerk ist für die Montage in einer der drei in Abbildung 5
gezeigtenOrientierungenvorgesehen.DasLaufwerkkannentweder
auf der Bodenplatte oder auf einer der beiden Seiten montiert
werden. Andere als die hier gezeigten Orientierungen sind nicht
zulässig. Die Abmessungen des Laufwerkes sind in Abbildung 6
gezeigt. Das Laufwerk wiegt 3,6 kg.
Einzelheiten zur Konstruktion eines auf die Montageabmessungen
des Laufwerkes abgestimmten Gehäuses entnehmen Sie bitte den
Produktspezifikationen für das Laufwerk.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
13
Up
Up
Up
Figure 5. Mounting orientations/
Montageorientierungen
14
ST43401N/ND, ST43402ND User’s Manual, Rev. B
82.55 mm
3.25 in
203.20 mm
8.00 in max
149.35 mm
5.88 in
Figure 6. Dimensions of the drive/
Laufwerkabmessungen
ST43401N/ND, ST43402ND User’s Manual, Rev. B
15
Power requirements
Thevoltageandcurrentrequirementsforasingledriveatcylinder0areshown
in Table 3. Ensure that your power supply meets these requirements.
Table 3. Single drive voltage and current requirements
Current without Internal
Terminator
Current with Internal
Terminator
Seeking
and
Reading
Contin-
Seeking
and
Reading
Contin-
uous
uous
Voltage
Idle
Reading
Idle
Reading
SCSI single-ended interface (ST43401N)
+5V
+12V
Watts
1.8A
1.8A
30.6W
1.9A
1.8A
31.1W
1.9A
1.8A
31.1W
1.8A
1.8A
30.6W
1.9A
1.8A
31.1W
1.9A
1.8A
31.1W
SCSI differential interface (ST43401ND)
+5V
+12V
Watts
1.9A
1.8A
31.1W
2.2A
1.8A
32.6W
2.3A
1.8A
33.1W
SCSI dual-port differential (ST43402ND)
+5V
+12V
Watts
3.0A
1.8A
36.6W
3.6A
1.8A
39.6W
3.7A
1.8A
40.1W
continued
16
ST43401N/ND, ST43402ND User’s Manual, Rev. B
continued from previous page
Without Internal
Terminator
With Internal
Terminator
Maximum Current Limits
+5V5,7 +12V5,7
+5V5,7 +12V5,7
Amps
Amps
Regulation ± 5%3,4,8,9
SCSI single-ended interface (ST43401N)
Maximum operating current1,2,6
Average idle current1
Maximum starting current1,2
Maximum seek current2
1.9
1.8
1.9
1.9
1.8
1.8
4.5
3.2
2.3
1.9
2.3
1.9
1.8
1.8
4.5
3.2
SCSI differential interface (ST43401ND)
Maximum operating current1,2,6
Average idle current1
Maximum starting current1,2
Maximum seek current9
1.9
1.8
1.9
1.9
1.8
1.8
4.5
3.2
SCSI dual-port differential (ST43402ND)
Maximum operating current1,2,6
Average idle current1
2.3
1.9
2.3
2.2
1.8
1.8
4.5
1.8
Maximum starting current1,2
Maximum seek current2
1
Measured with an average reading DC ammeter.
2
Instantaneous +12V current peaks will exceed these values by up to 0.8A. The +12V average
current during a 15 ms portion of the actuator signal does not exceed 4.0A.
3
4
A ±10% tolerance on +12V is permissible during power-up.
Inclusive of ripple, noise, transient response (except for +12V), load variation, and environ-
mental conditions. An overvoltage of the +5V (greater than 6V) must cause the power supply
to interrupt all DC voltages. Transient response assumes +12V changing from 1.0A to 7.2A
within 200 microsecs and all other voltages at a steady state.Transient response frequencies
above 30 kHz are now allowed.
5
6
7
The +12V ground return must be isolated from the +5V ground return in the power supply. The
+5V and +12V ground are shorted together in the drive. Where multiple units are powered on
simultaneously, the peak starting current must be available to each drive.
The drive requires overcurrent protection on all voltages. An overcurrent on the +12V must
cause the power supply to interrupt all DC voltages. Overcurrent on the +5V must reduce the
output current to zero and interrupt all DC voltages.
All voltages must meet specifications within 100 msecs after the first voltage reaches 10% of
its specified value.
8
9
Transient response frequencies above 30 kHz are not allowed.
Transient response assumes +12V changing from 1.0A to 7.2A within 200 microsecs and all
other voltages at a steady state.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
17
Grounding requirements
A safety ground must be provided by the site AC power system. The green
wire(orgreenwirewithyellowstripe)intheACpowercordprovidesthesafety
ground connection between the power supply and the site AC power system.
The site AC power system must provide the safety ground to earth ground
connection.
All site AC power connection points, including convenience outlets for test
equipment, must be maintained at the same safety ground potential.
Interface requirements
An important part of site preparation is planning the layout and routing ofI/O
cables. All drives and other SCSI devices are connected together and to
the host with an I/O cable. TheSCSIbuscanhaveupto16devicesattached
toitasshowninFigure 7.TheI/Ocablingschemeusediscalledadaisychain.
Each end of the SCSI bus must be terminated.
Term
Term
SCSI
Device
0
SCSI
Device
15
SCSI
Device
1
SCSI
Device
14
SCSI
Device
2
SCSI
Device
13
SCSI
Device
3
SCSI
Device
12
Figure 7. SCSI bus configuration
18
ST43401N/ND, ST43402ND User’s Manual, Rev. B
A connector (J6) at the back of the drive accepts the I/O cable that connects
it to the system. The daisy-chain cable is a continuous unshielded cable
having one connector for each drive it connects to.
Refer to the reference manual (publication 83327730) for guidelines on I/O
cabling. These guidelines discuss the use of unshielded cabling inside
cabinets and shielded cabling running between cabinets. They also contain
informationaboutconstructingcontinuousdaisy-chaincabling(includingpart
numbers for the required cabling components).
Table 4 shows the pin assignments and signal names for the unshielded
single-ended I/O P cable. Table 5 shows the pin assignments and signal
names for the unshielded differential I/O P cable. Detailed information about
interface lines is provided in the reference manual.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
19
Table 4. Unshielded single-ended I/O cabling (P cable)
Even pin
numbers
Odd in
numbers
Signal name
Signal name
DB– (12)
DB– (13)
DB– (14)
DB– (15)
DB– (P1)
DB– (0)
DB– (1)
DB– (2)
DB– (3)
DB– (4)
DB– (5)
DB– (6)
DB– (7)
DB– (P)
GROUND
GROUND
TERMPWR
TERMPWR
RESERVED
GROUND
ATN–
2
4
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
TERMPWR
TERMPWR
RESERVED
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
GROUND
1
3
6
8
5
7
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
GROUND
BSY–
ACK–
RST–
MSG–
SEL–
C/D–
REQ–
I/O–
DB– (8)
DB– (9)
DB– (10)
DB– (11)
Note. A minus sign indicates active low.
20
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Table 5. Unshielded differential I/O cabling (P cable)
Even pin
Odd pin
Signal name
numbers
Signal name
numbers
DB– (12)
DB– (13)
DB– (14)
DB– (15)
DB– (P1)
GROUND
DB– (0)
DB– (1)
DB– (2)
DB– (3)
DB– (4)
DB– (5)
DB– (6)
DB– (7)
DB– (P)
GROUND
TERMPWR
TERMPWR
RESERVED
ATN–
2
4
6
DB (12)
DB (13)
DB (14)
DB (15)
DB (P1)
GROUND
DB (0)
DB (1)
DB (2)
DB (3)
DB (4)
DB (5)
DB (6)
DB (7)
DB (P)
DIFFSENS
TERMPWR
TERMPWR
RESERVED
ATN
1
3
5
8
7
9
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
GROUND
BSY–
ACK–
GROUND
BSY
ACK
RST–
MSG–
RST
MSG
SEL–
C/D–
SEL
C/D
REQ–
I/O–
REQ
I/O
Note. A minus sign indicates active low.
continued
ST43401N/ND, ST43402ND User’s Manual, Rev. B
continued from previous page
21
Even pin
numbers
Odd pin
numbers
Signal name
Signal name
GROUND
DB– (8)
60
62
64
66
68
GROUND
DB (8)
59
61
63
65
67
DB– (9)
DB– (10)
DB– (11)
DB (9)
DB (10)
DB (11)
Notes:
1. A minus sign indicates active low.
2. Eight-bit devices connected to the P cable must leave the following
signals open:
DB– (12)
DB– (13)
DB– (14)
DB– (15)
DB– (P1)
DB– (8)
DB (12)
DB (13)
DB (14)
DB (15)
DB (P1)
DB (8)
DB– (9)
DB (9)
DB– (10)
DB– (11)
DB (10)
DB (11)
22
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Unpacking, inspection, and repacking
After removing the packing material, inspect the drive for shipping damage.
Save all packing materials for future use.
The drive is shipped separately from any other items ordered for the
installation.
Unpacking
1. Allow the drive temperature to approach the ambient temperature of the
unpacking area. Ensure that the temperature stabilization period meets
the requirements printed on the drive container.
2. Open the package and remove the drive from its conductive static
shielding bag, using precautions described in “Electrostatic discharge
protection” in the preface.
3. Check all items against the shipping bill for the required equipment and
hardware to complete installation. Discrepancies, missing items, dam-
aged equipment, etc. should be reported to the sales representative from
whom the drive was purchased.
Inspection
Inspect the drive for possible shipping damage. All claims for shipping
damage should be filed with the carrier involved.
Repacking
If it is necessary to ship the drive, repack the drive with the original packing
materials (saved during unpacking). Refer to Section 5 for instructions.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
23
Installation procedures
With the site requirements completed, the enclosure designed, and the drive
unpackedyouarereadytobegintheinstallation.Thefollowingproceduresare
included in drive installation:
• Setting the circuit board jumpers
• Installing a power supply
• Attaching an optional bezel
• Mounting the drive
• Connecting the system I/O cabling
• Grounding the system
• Synchronizing the spindle
Setting the control board jumpers
Caution. Do not remove the circuit boards to set jumpers.
The circuit boards on the drive contain a number of jumpers that must be set
correctly for normal operation of the drive. The termination must also be set
correctly for normal operation.
ST43401N and ST43401ND drives have two circuit boards—one control
board and one power board—but all of the necessary jumpers, including the
terminationjumper and terminator resistor-pak sockets, areon the control
board. See Figure 8 to configure an ST43401N or ST43401ND drive.
The ST43402ND drive has two circuit boards—one control board and one
I/O board—which must be configured correctly for normal drive operation.
See Figures 9, 10, 11, and 12 to configure an ST43402ND drive.
Note. TheoptionpinheadersonJ10(seeFigure11)areprovidedformanual
driveconfiguration.Thishelpsyouconnectthediscdrivetoanexternal
device such as a switch or connection. Ground should be provided by
the external device.
24
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Terminator Resistor-Paks (3)
Write Protect/Enable (WRT)
(must be installed if drive is at
either end of the daisychain)
= Jumper
connected
Fault LED connector
Ready LED connector
Slave Select (SLV)
= Jumper not
connected
Pin 1
Pin 1
Pin 1
= Non-applicable
jumper (not
relevant to the
option discussed)
SLV
WRT
J4A
Write Protect/Enable (WRT)
Write protect (disable writing)
Write enable (enable writing)
Slave Select (SLV)
Master (master drive for spindle sync)
Slave (slave drive unless selected as
the master by a SCSI command)
Spinup Delay Option (SDO)
Start Command Option (SCO)
ID3
ID2
ID1
ID0
SCSI Bus Parity Check Option (SCPAR)
Sweep Cycle Option (SWP)
SDO SCPAR
Unit Selectors
SCO SWP
Motor (MTR)
J4B
Ground (GND)
Key (no pins)
Spinup Delay Option (SDO)
Immediate spinup
Spindle Sync Clock – (SSCLK–)
Spindle Sync Clock + (SSCLK+)
(if the Start Command Option jumper is disconnected)
Spinup delay equal to the SCSI bus ID multiplied
by 10 seconds (if the Start Command Option
jumper is disconnected)
ID3 ID1 MTR Spindle
Sync Pins
ID2 ID0
J7
Start Command Option (SCO)
Start spindle according to the Spinup Delay
Option jumper
SCSI Unit Selectors
Unit Select ID = 0
Start spindle after the SCSI bus sends a Start
Unit command
Unit Select ID = 1
Unit Select ID = 2
Unit Select ID = 3
Unit Select ID = 4
Unit Select ID = 5
Unit Select ID = 6
Unit Select ID = 7
Unit Select ID = 8
Unit Select ID = 9
Unit Select ID = A
Unit Select ID = B
Unit Select ID = C
Unit Select ID = D
Unit Select ID = E
Unit Select ID = F
SCSI Bus Parity Check Option (SCPAR)
Enable parity check of SCSI bus data
Ignore parity
Sweep Cycle Option (SWP)
Disable sweep cycles (recommendation – sweep cycles
should be enabled at the system or subsystem level)
Enable sweep cycles at the drive level
4
3
J01
2
Terminator Power Source Jumper
1
2
1
4
3
Assign the terminal power jumpers as shown below.
Internal terminator power source.
External terminator power source.
Internal terminator power to I/O.
Figure 8. ST43401N/ND control board jumpers
ST43401N/ND, ST43402ND User’s Manual, Rev. B
25
= Jumper
connected
= Jumper not
connected
= Non-applicable jumper
(not relevant to the
option discussed)
Not used
Spinup Delay Option (SDO)
Not used
Start Command Option (SCO)
SCSI Bus Parity Check Option (SCPAR)
Sweep Cycle Option (SWP)
Not used
Write Protect/Enable (WRT)
Slave Select (SLV)
SDO SCPAR
SCO SWP
J4A
J4B
N/A WRT
N/A N/A SLV
Spinup Delay Option (SDO)
Immediate spinup
(if the Start Command Option jumper
is disconnected)
Write Protect/Enable (WRT)
Write protect (disable writing)
Write enable (enable writing)
Spinup delay equal to the SCSI bus ID
multiplied by 10 seconds (if the Start
Command Option jumper is disconnected)
Start Command Option (SCO)
Slave Select (SLV)
Start spindle according to the Spinup
Delay Option jumper
Master (master for spindle sync)
Start spindle after the SCSI bus sends
a Start Unit command
Slave (slave drive unless
selected as the master by a
SCSI command)
SCSI Bus Parity Check (SCPAR)
Enable parity check of SCSI bus data
Ignore parity
Sweep Cycle Option (SWP)
Disable sweep cycles (recommendation —
sweep cycles should be enabled at the
system or subsystem level)
Enable sweep cycles at the drive level
Figure 9. ST43402ND control board jumpers
26
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Ground (GND)
Pin 2
Pin 1
J09
SCSI Bus Select Mode (SBS)
ID_A0 (A0)
ID_A1 (A1)
ID_A2 (A2)
Port A SCSI ID Selectors
ID_A3 (A3)
ID_B0 (B0)
ID_B1 (B1)
ID_B2 (B2)
ID_B3 (B3)
= Jumper
connected
= Jumper not
connected
Port B SCSI ID Selectors
= Non-applicable jumper
(not relevant to the
option discussed)
GND
GND
B3
B1
A3
A1 SBS
A2 A0
B2
B0
Port A SCSI ID
B3
B1
A3
A1 SBS
A2 A0
B2
B0
Port B SCSI ID
Port A SCSI ID = 0
Port B SCSI ID = 0
Port A SCSI ID = 1
Port A SCSI ID = 2
Port A SCSI ID = 3
Port A SCSI ID = 4
Port A SCSI ID = 5
Port A SCSI ID = 6
Port A SCSI ID = 7
Port A SCSI ID = 8
Port A SCSI ID = 9
Port A SCSI ID = A
Port A SCSI ID = B
Port A SCSI ID = C
Port A SCSI ID = D
Port A SCSI ID = E
Port A SCSI ID = F
Port B SCSI ID = 1
Port B SCSI ID = 2
Port B SCSI ID = 3
Port B SCSI ID = 4
Port B SCSI ID = 5
Port B SCSI ID = 6
Port B SCSI ID = 7
Port B SCSI ID = 8
Port B SCSI ID = 9
Port B SCSI ID = A
Port B SCSI ID = B
Port B SCSI ID = C
Port B SCSI ID = D
Port B SCSI ID = E
Port B SCSI ID = F
Port B dictates Port A’s SCSI ID
(the drive ignores all Port A
jumpers and assigns Port A the
same SCSI ID as Port B)
Figure 10. ST43402ND I/O board J09 jumpers
ST43401N/ND, ST43402ND User’s Manual, Rev. B
27
LED 4 (L4)
Write Protect/Enable LED (WPL)
Port B Active LED (PB)
Port A Active LED (PA)
Ready LED (RL)
LED 6 N/A (L6)
Pin 2
Pin 1
Spinup Delay Option (SDO)
Fault LED (FL)
Not Assigned (NA)
J10
ID 03 (ID3)
= Ground this pin to the
external device to activate
the option discussed
Panel Start/Stop (PSS)
ID 00 (ID0)
SCSI Bus Select (SBS)
Self-Test (ST)
= Remove ground from this pin
using the external device to negate
this option
ID 01 (ID1)
ID 02 (ID2)
Write Protect/Enable (WRT)
Manual Reset (MR)
= Non-applicable pin (not relevant to the
option discussed)
WPL PA
L6
FL
L4
PB
RL SDO NA
WPL PA
L6
FL
L4
PB
RL SDO NA
MR
ID2
ST
ID0 ID3
WRT ID1 SBS PSS
SCSI Bus ID
SCSI ID = 0
MR
ID2
ST
ID0 ID3
WRT ID1 SBS PSS
Manual Reset (MR)
Ground this pin to manually reset the SCSI board.
Remove ground after reset.
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 = A
SCSI ID = B
SCSI ID = C
SCSI ID = D
SCSI ID = E
SCSI ID = F
Write Protect/Enable (WPL)
Write protect (disable writing)
Write enable (enable writing)
Panel Start/Stop (PSS)
Start spindle after the SCSI bus sends a
Start Unit command.
Start spindle according to the Spinup Delay
Option (SDO) pin on this I/O board.
Spinup Delay Option (SDO)
Used only if the PSS pin jumper is not connected.
Start turning spindle when power is applied.
Start spindle after a delay. The delay
(in seconds) is 10 seconds times the SCSI ID.
For example, when the SCSI ID is 4, a delay
of 40 seconds occurs before spinup starts.
SCSI Bus Select Mode Option (SBS)
Allow ports A and B to have different SCSI IDs.
Assign port A the same SCSI ID that port B has.
Self-Test (ST)
Use this pin to connect an indicator which will flash
when the drive is in the self-test mode of power up.
Figure 11. ST43402ND I/O board J10 jumpers
28
ST43401N/ND, ST43402ND User’s Manual, Rev. B
J01B
= Jumper
connected
Port B I/O
= Jumper not
connected
= Non-applicable jumper
(not relevant to the
option discussed)
J01A
J03
Port A I/O
Enable/Disable Port A (EPA)
Ground (GND)
Enable/Disable Port B (EPB)
Ground (GND)
EPA
J01
(A & B)
GND
EPB
GND
Enable/Disable Port A
4
2
3
1
Enable Port A
Disable Port A
Terminator Power J01A is for
Port A and J01B is for Port B.
Assign the terminal power
jumpers as shown below.
4
2
3
1
Enable/Disable Port B
Enable Port B
Internal terminator power source.
External terminator power source.
Internal terminator power to I/O.
Disable Port B
Enable Port A and Port B
Simultaneously
Use jumpers to connect the four
pins as illustrated.
Figure 12. ST43402ND I/O board J01 and J03 jumpers
ST43401N/ND, ST43402ND User’s Manual, Rev. B
29
Installing a power supply
Apowersupplyisrequiredtoprovidecurrenttothediscdrive.Severalvendors
offer power supplies that meet the disc drive’s power requirements. Ensure
that the power supply you select meets these requirements as specified in
Table 3.
Setting the voltage range
Caution. Most power supplies will be damaged if the voltage select is set for
thelowrange(100–120VAC)andavoltageinthehighrange(208–
240 VAC) is applied.
1. Ensure that the AC power cable is disconnected from the power supply.
2. Refer to the power supply documentation, or contact the supplier for
instructions.
Mounting the power supply
1. Mount the power supply in the desired location.
2. Connectagroundstrapbetweenthepowersupplyandthecabinetground.
3. Attach the AC power cord to the power supply connector. Do not connect
the power cord to site power until directed.
30
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Attaching an optional bezel
Usethefollowingproceduretoattachanoptionalbezeltothedrive.Thebezel
is available as an accessory (see Section 4).
1. Remove the backing from the double-sticky tape attached to the rear
surface of the bezel.
2. Orient the drive and bezel as shown in Figure 13.
3. Align the mounting bosses on the rear of the bezel to the matching holes
in the drive chassis.
4. Press the bezel into place on the drive chassis ensuring that the mounting
bosses extend through the chassis holes and that the double-sticky tape
is in contact with both bezel and chassis.
5. Remove the selected LED (if present) from the LED socket and insert the
LED plug from the bezel into the socket.
Control
Board
LED
Socket
LED
Plug
Chassis
Chassis Mounting Holes (2)
Active
LED
Bezel
Mounting Boss
Figure 13. Attaching a bezel (ST43401N/ND shown)
ST43401N/ND, ST43402ND User’s Manual, Rev. B
31
Mounting the drive
Caution. When installing the drive, observe all precautions listed under
“Electrostatic discharge protection” in the preface. Failure to ob-
serve these precautions can result in serious damage to electronic
assemblies.
Thedrivemaybesecuredtotheenclosureusingthetappedholesineitherthe
sides or the bottom of the drive chassis. Figure 14 shows two of the three
allowable orientations.
Note. The mounting screws must be completely engaged in the drive
chassis, but the portion that extends into the chassis must not exceed
3.5 mm (0.140 in) in length.
1. Place the drive into position in the enclosure and secure with four screws
as shown in Figure 14.
• For bottom mounting, use 6-32 screws.
• For side mounting, use either 6-32 screws or M4 x .70 (metric) screws.
There are tapped holes for each type.
2. Connectthe9-pinconnectoroftheDCpowercabletotheoutputconnector
onthepowersupply. Connectthe4-pinconnectorofthesamecabletothe
DC power connector J15 on the drive.
3. Connect the AC power cord to site power.
32
ST43401N/ND, ST43402ND User’s Manual, Rev. B
1
6-32
Bottom-Mounting
Screws (4)
DC power and pin
connector assignments
2
1
2
3
4
Power Supply
(9 pin)
Pin Number
Drive
Pin
Power
1
2
3
4
+12 VDC
7, 8
6, 9
3, 4
1, 2
Up
+12 Volts return
+5 Volts return
+5 VDC
Up
2
DC Power
Connector
J15
Pin 1
DC Power
Cable
M4 x .70
(metric)
6-32
Screw
Side-Mounting
Screws (2 on
each side)
M4 x .70
(metric)
1
Note:
6-32
Screw
Either side- or bottom-mounting screws
can be used with each drive orientation
1
Figure 14. Mounting the drive (ST43401N/ND shown)
ST43401N/ND, ST43402ND User’s Manual, Rev. B
33
Connecting the system I/O cabling
Make sure the site has been prepared in accordance with the site require-
ments information provided earlier in this section. This procedure describes
how to cable the system in a daisy-chain configuration, which was discussed
earlier in this section in “Interface requirements.”
ST43401N/ND drives
The drive has one I/O connector on the control board. Figure 15 shows how
a typical I/O cable connects to the board.
If the drive is either the first or last device (at either end) in the daisy chain, it
must be terminated. Drives in the middle of the daisy chain must not be
terminated. Drives that are terminated have three terminator resistor-paks
installed as shown in Figures 17 (ST43401N) and 18 (ST43401ND).
I/O
Connector
Pin 1
Daisychain
I/O Cable
Figure 15. ST43401N/ND I/O cable attachment
34
ST43401N/ND, ST43402ND User’s Manual, Rev. B
ST43402ND drives
ST43402ND drives have two I/O connectors as shown in Figure 16. Both of
these I/O connectors (one for Port A and the other for Port B) are located on
theI/Oboard.Figure16showshowtypicalI/OcablesconnecttotheI/Oboard.
Youmustuseanadapter(partnumber70935801)toterminateeachI/Ocable
following the last drive in the daisy chain. Refer to information earlier in this
sectionregardingtheterminatorpowersourcejumpersandinterfacerequire-
ments.
Port B
Daisychain
I/O Cable
Port B
I/O Connector
I/O
Board
Port A
I/O Connector
Port A
Daisychain
I/O Cable
Figure 16. ST43402ND I/O cable attachment
ST43401N/ND, ST43402ND User’s Manual, Rev. B
35
Figure17showshowtheterminatorresistor-paksareattachedonST43401N
drives(single-endedI/O).Theterminatorresistor-paks,whicharesingleinline
packages, mountintherowsofholeslocatedinthecontrolboard. Ensurethat
they are installed with the correct orientation (indicated by a dot above pin 1)
to terminate these drives.
Terminator
Terminator
Resistor-Pak
Resistor-Paks
(note orientation)
(part number
96752447)
Pin
1
Mounting Holes
in Control Board
Terminator
Power
Source Jumper
Figure 17. ST43401N terminator attachment—single-ended I/O
36
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Figure18showshowtheterminatorresistor-paksareattachedonST43401ND
drives (differential I/O). These terminator resistor-paks, which are dual inline
packages, mount in sockets in the control board. These terminators are also
marked with a dot above pin 1.
If the drive is located at either end of the daisy chain, ensure that it has
resistor-pak(s) installed. Refer to information earlier in this section re-
garding the terminator power source jumper.
Terminator
Terminator
Resistor-Paks
(part number
70906701)
Resistor-Pak
(note orientation)
Terminator
Socket
Pin 1
Terminator
Power
Source Jumper
Figure 18. ST43401ND terminator attachment—differential I/O
ST43401N/ND, ST43402ND User’s Manual, Rev. B
37
Grounding the system
Grounding the system through the power cables and I/O cables is usually
sufficient to protect against noise and emissions.
Synchronizing the spindle
Thespindlesyncfeaturemakesitpossibletosynchronizethespindlerotation
ofagroupofdiscdrives.Thisreducesthelatencynormallyencounteredwhen
the initiator switches between multiple disc drives.
Figure 19 shows two system configurations. In one type of system, one of the
disc drives in the system provides the reference clock. In the other type, an
external signal source provides the reference clock.
Internal Source
External Source
Signal Source
Spindle
Sync
Cable
Spindle
Sync
Cable
J05
T
T
Drive
SP
Select
Plug
J05
J05
J05
J05
J05
J05
Drive
(master)
✴
Drive
Drive
Drive
SP
SP
Drive
Drive
SP
32 loads
maximum
32 loads
maximum
T
T
Terminator
Terminator
SP
SP
Master designated by jumper or by initiator
✴
Figure 19. System diagram for spindle sync
38
ST43401N/ND, ST43402ND User’s Manual, Rev. B
To enable the feature, it is necessary to run an additional daisy-chain cable
from drive to drive and to make a master/slave selection for each drive.
Connector J7 is used by ST43401N/ND drives. Connector J5 on the control
board handles the cable connections on ST43402ND drives. Master/slave
selection is made by a jumper on connector J4A. Figure 20 shows the two
connectors for ST43401N/ND drives, and Figure 21 shows the two connec-
tors for ST43402ND drives.
For a drive at the end of the daisy chain, the cable connects to one of the two
rows of pins (row A or row B), and a terminator connects to the other row of
pins. Both ends of the cable must be terminated.
Pin 1
J7
Cable from
Preceding Unit
A
B
Cable to
Next Unit
Control
Board
J4A
Slave Select
Select Plug
(removed = master)
Figure 20. Making ST43401N/ND spindle sync connections
ST43401N/ND, ST43402ND User’s Manual, Rev. B
39
Pin 1
J5
Cable from
Preceding Unit
A
B
Cable to
Next Unit
Control
Board
J4A
Slave Select
Select Plug
(removed = master)
Figure 21. Making ST43402ND spindle sync connections
40
ST43401N/ND, ST43402ND User’s Manual, Rev. B
For each drive in the middle of the daisy chain, the cable from the preceding
unit connects to one row of pins in (row A or row B), and the cable to the next
unit connects to the other row of pins.
There are two ways to establish a drive as a master (supplying the sync
reference signal to all drives connected for spindle sync).
• Remove the jumper connecting the master/slave pins on connector J4A
(the drives are shipped with the pins disconnected).
• IssuethatdriveaModeSelectcommandontheSCSIinterface(Thejumper
must be connecting the master/slave pins). The spindle sync is controlled
by the RPL bits in page 4, byte 17 of the Mode Select (or Mode Sense)
parameters.
Onlyonedriveinthedaisychaincanbeestablishedasthemaster.Themaster
drive can be located anywhere along the daisy-chain cable as long as both
ends of the cable are terminated.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
41
Verification
After installing the drive, follow the sequence outlined below for initial startup.
1. Place the on/standby switch in the on ( l ) position. What follows
depends on the setting of the Start Command option and the Spinup
Delay option jumpers.
• If the Start Command option jumper was connected, the spindle spinup
begins immediately after a Start Unit command is received from the
SCSI bus.
• IftheSpinupDelayoptionjumperandtheStartCommandoptionjumper
were both disconnected, the spindle spinup begins immediately.
• If the Spinup Delay option jumper was connected and the Start Com-
mand option jumper was disconnected, the spindle spinup begins after
a sequence delay interval. The length of this interval equals the SCSI
Bus ID number (Target ID) multiplied by 10 seconds.
For example: SCSI bus ID 0 = 0 second delay
SCSI bus ID 15 = 150 second delay
2. Observe that the Ready LED begins flashing when power is applied to the
spindle motor. The Ready LED is one of two green control board LEDs—
see Figure 22.
3. Observe that the Ready LED lights steadily within 30 seconds after the
power is applied to the spindle motor. This indicates that drive motor is up
to speed and that heads are at track 0.
4. Observe that the Heartbeat LED is blinking. This indicates that the
SCSI controller is operating properly. The Heartbeat LED is the other
green control board LED—see Figure 22.
If all of these events occurred, the drive is now ready for online operation. If
any event did not occur, a problem exists in the drive or itsinstallation—refer
to maintenance information in Section 5.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
43
Section 3. Operation
This section provides the information and instructions to operate the drive. It
is arranged as follows:
• LEDindicators—locatesanddescribestheswitchesandindicatorsusedfor
normal drive operation.
• Operating instructions—describes procedures for operating the drive.
LED indicators
Following initial checkout, the drive normally requires no attention from the
operator. Although power is usually left on, as the operator you should know
where the on/standby switch is located on the power supply. Also, you may
be asked to examine the LED indicators.
Two of the maintenance LEDs are located on the drive’s control board. The
third maintenance LED is located either on the control board or on an optional
bezel (if the bezel is installed). Figure 22 shows the LED indicators on
ST43401N/NDdrives, andtheyareexplainedinTable6. Figure23showsthe
LED indicators on ST43402ND drives; they are explained in Table 7.
44
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Socket for Active LED (red)
Heartbeat LED (green)
Ready LED (green)
Active LED
(on optional
bezel)
Control
Board
Figure 22. LEDs on ST43401N/ND drives
ST43401N/ND, ST43402ND User’s Manual, Rev. B
45
Table 6. LED functions for ST43401N/ND drives
LED indicator
Function
Drive control board
Ready LED
(green)
This LED flashes during the power-on sequence until
the discs are up to speed and the heads are loaded.
Itisonsteadywithpower-oncomplete,assumingthat
there are no fault conditions.
It flashes during a power-off sequence. This occurs
when the drive receives a Start/Stop Unit command
after it has once been started.
Heartbeat LED
(green)
ThisLEDblinkswhentheSCSIcontrollerisoperating
properly.
IftheLEDisconstantlyonoroff,itindicatesoneoftwo
things:
• The SCSI controller is not functioning properly.
• The SCSI controller is executing diagnostics and
should be ready in a few seconds.
Active LED
(socket)
ThisLEDsocketisprovidedforunitswhichdonotuse
the optional bezel. When the active LED is inserted
into this socket, it indicates SCSI command activity.
Whenitison,thedriveisexecutingaSCSIcommand.
When it is off, the drive does not have a SCSI
command to execute.
Optional bezel on drive
Active LED
(color unspecified)
This LED indicates command activity by the drive.
Whenitison,thedriveisexecutingaSCSIcommand.
When it is off, the drive does not have a SCSI
command to execute.
46
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Socket for Active LED (red)
Heartbeat LED (green)
Ready LED (green)
Optional
Bezel
Control
Board
Port A Enabled LED (green)
Port B Active LED (red)
Port B Enabled LED (green)
Figure 23. LEDs on ST43402ND drives
ST43401N/ND, ST43402ND User’s Manual, Rev. B
47
Table 7. LED functions for ST43402ND drives
LED indicator
Function
Drive control board
Ready LED
(green)
This LED flashes during the power-on sequence until
the discs are up to speed and the heads are loaded.
Itisonsteadywithpower-oncomplete,assumingthat
there are no fault conditions.
It flashes during a power-off sequence. This occurs
when the drive receives a Start/Stop Unit command
after it has once been started.
Heartbeat LED
(green)
ThisLEDblinkswhentheSCSIcontrollerisoperating
properly.
IftheLEDisconstantlyonoroff,itindicatesoneoftwo
things:
• The SCSI controller is not functioning properly.
• The SCSI controller is executing diagnostics and
should be ready in a few seconds.
Active LED
(socket)
ThisLEDsocketisprovidedforunitswhichdonotuse
the optional bezel. When the active LED is inserted
into this socket, it indicates SCSI command activity.
Whenitison,thedriveisexecutingaSCSIcommand.
When it is off, the drive does not have a SCSI
command to execute.
Optional bezel on drive
Active LED
(color unspecified)
This LED indicates command activity by the drive.
Whenitison,thedriveisexecutingaSCSIcommand.
When it is off, the drive does not have a SCSI
command to execute.
continued
48
ST43401N/ND, ST43402ND User’s Manual, Rev. B
continued from previous page
LED or indicator
Function
SCSI I/O board
SCSI port A enabled This LED is on steady when port A is enabled to
(green)
receive SCSI commands and to transfer data on
this port.
SCSI port B enabled This LED is on steady when port B is enabled to
(green)
receive SCSI commands and to transfer data on
this port.
SCSI port A active
(red)
This LED is on when port B is actively executing a
SCSI command.
This LED is off when port B does not have a SCSI
command to execute.
Operating instructions
Following initial checkout, the drive normally requires no attention from the
operator. DC power is available to the drive, as the On/Standby switch on the
power supply is normally left in the On ( l ) position.
If you wish to verify that the drive has completed its power-on sequence,
access the drive and then check that its Ready LED is on steady and that the
Heartbeat LED is blinking (see Figure 22 for ST43401N/ND drives or Figure
23 for ST43402ND drives).
If the Start Command option was selected (using a circuit board jumper), the
Stop/Start Unit command must be used to start and stop the drive.
If the Start Command option was not selected, once the drive has been
started, theStop/StartUnitcommandcanbeusedtostopandlaterrestartthe
drive.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
49
Section 4. Parts data
This section lists part numbers of options and accessories that can be used
inadriveinstallation. Becausethedriveisdepotrepairable, therearenofield-
replaceable parts. If the drive requires maintenance, refer to the instructions
in Section 5.
Table 8 lists the part numbers for options and accessories for system
installation.
50
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Table 8. Options and accessories
Part
number
Description
12263496 Static ground wrist strap, 6 1/2 to 8-inch wrist
**
**
I/O cables (unshielded)
External terminators
96752447 Terminator resistor-pak, single-ended
70906701 Terminator resistor-pak, differential
70935801 Terminator adapter cable assembly, differential
75168323 AC power cord set, 100–120V, 60 Hz, 5-15P
75168334 AC power cord set, 208–240V, 60 Hz, 6-15P
75168324 AC power cord set, 208–240V, 50 Hz
89500420 DC power cable, 24 inches (609.6 mm) long
(power supply to drive)
89500422 DC power cable, 6 inches (15.2 cm) long (power supply to drive)
70553701 Bezel, black (with red LED, cable, and double-sticky tape)
70553702 Bezel, black (with green LED, cable, and double-sticky tape)
70703929 Spindle sync cable*, 1.5 feet (0.46 meter) long
70703921 Spindle sync cable*, 3 feet (0.92 meter) long
70703922 Spindle sync cable*, 5 feet (1.52 meter) long
70703923 Spindle sync cable*, 7 feet (2.12 meter) long
70703924 Spindle sync cable*, 10 feet (3.05 meter) long
70703925 Spindle sync cable*, 20 feet (6.10 meter) long
70703926 Spindle sync cable*, 30 feet (9.14 meter) long
70703927 Spindle sync cable*, 40 feet (12.20 meter) long
70703928 Spindle sync cable*, 50 feet (15.24 meter) long
70574221 Spindle sync terminator
97630051 Shunt, two-pin (2 mm)
(used to select options on circuit board jumpers)
70935801 Adapter cable assembly
* Acustomcablemaybeneededforspindlesyncconnectionbetweenadrive
and an external source.
**See the reference manual (publication 83327730) for part numbers of
terminators, complete I/O cables, and connectors and cabling needed to
create custom I/O cables.
ST43401N/ND, ST43402ND User’s Manual, Rev. B
51
Section 5. Maintenance
This section contains the following maintenance information:
• Observing maintenance precautions
• Arranging for depot repair
• Removing and replacing a drive
• Packing a drive for shipment
Observing maintenance precautions
Because the drive is depot repairable, there are no field-replaceable parts.
Before beginning any maintenance activities, observe the following precau-
tions:
• Follow the precautions listed under “Electrostatic discharge protection” in
the preface.
• Do not remove any circuit boards from the drive chassis. 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.
• Do not remove the head and disc assembly (HDA) from the drive chassis.
Return the entire drive for depot repair if the HDA is defective.
• DonotattempttodisassembletheHDA.Itisnotfieldrepairable.Ifthesealed
HDA is opened by personnel not performing depot repair, this will damage
components and void the warranty.
• Use forced-air ventilation when bench-testing the drive to ensure proper
cooling of drive components.
• Do not handle the drive while powered up, due to the gyroscopic motion
produced by discs that have not completed spinning down.
• Do not connect or disconnect I/O cables while power is applied to the drive
or other SCSI devices. If the SCSI bus is active, this will cause errors.
• Do not connect or disconnect the DC power cable while the power supply
is energized.
52
ST43401N/ND, ST43402ND User’s Manual, Rev. B
Arranging for depot repair
Before returning any units to Seagate, it is necessary to obtain a returned
material authorization (RMA) number. To get the number, you will need to
know the part number and serial number of the unit. These numbers appear
on a label located on the side of the HDA. Then contact:
Seagate Technology, Inc.
Customer Services
Phone: 1-800-468-3472
Removing and replacing a drive
Caution. When servicing the drive, observe all precautions listed under
“Electrostatic discharge protection” in the preface. Failure to ob-
serve these precautions can result in serious damage to electronic
assemblies.
Warning. Be sure that the drive has completed spinning down before remov-
ing it from its mounting. You may be physically harmed by the
gyroscopic motion produced by discs which have not completed
spinning down.
To remove a drive for maintenance, perform the following steps:
1. Remove power from the drive by setting the On/Standby switch on the
power supply to the Standby position.
2. Disconnect the AC power cable from site power.
3. Disconnect the I/O cable and spindle sync cables (if used) from the drive.
4. DisconnecttheDCpowercablefromtheDCpowerconnectoronthedrive.
5. Removethemountingscrewsthatsecurethedrivechassistothecabinet.
7. Carefullyliftthedrivefromitsmountingandmoveittothedesiredlocation.
To install a replacement drive, follow the procedures in Section 2.
Packing a drive for shipment
If it is necessary to ship the drive, repack the drive with the original packing
materials (saved during installation). Comply with the packing instructions to
ensure that the drive will be undamaged in shipment.
Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, CA 95066-4544, USA
Publication Number: 83327720, Rev. B, Printed in USA
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