Seagate ST43402ND User Manual

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.  
iv  
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.  
vi  
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  
2
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  
byheadsthatarepositionedovertherotatingdiscsrecordingsurfaces.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 itsinstallationrefer  
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  

Yamaha CDC 655 User Manual
Toshiba Scorpio WD10TPVT User Manual
Tascam CC 222SLmkII User Manual
Seagate SAVVIO10K4 SAS ST9450304SS User Manual
Seagate Constellation ST32000647SS User Manual
Seagate BARRACUDA 720011 SERIAL ATA ST3500620AS User Manual
Samsung SCH R451C Series User Manual
Roland CD 2i User Manual
Pioneer DEH P6100R User Manual
Philips Xenium CT9A9RBLK User Manual