seagate ST43401N, ST43402ND User manual

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

Elite Disc Drive

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

ST43401N/ND

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

ST43402ND

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

Reference Manual

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

Contents

Preface ................................................................................................... iii

Electrostatic discharge protection........................................................... iii

Important safety information and precautions ......................................... iv

Technical support services ..................................................................... vi

Section 1. General maintenance information ......................................... 1

Section 2. Planning the system.............................................................. 5

Section 3. Interface functions ................................................................ 19

Seagate®, Seagate Technology®, and the Seagate logo are registered trademarks of Seagate Technology, Inc. Elite™, SeaFAX™, SeaFONE™, SeaTDD™, and SeaBOARD™ are trademarks of Seagate Technology, Inc. Other product names are registered trademarks or trademarks of their owners.

Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any form without written permission from Seagate Technology, Inc.

ST43401N/ND and ST43402ND Reference Manual, Rev. C iii

Preface

This is a reference manual for users of Seagate® ST43401N/ND and ST43402ND Elite™ disc drives employing the SCSI interface. It supplements the information presented in the user’s manual (publication 83327720). It is intended to aid engineers who design subsystems using the drive and customer engineers who install and check out the drive. This manual should be used in conjunction with the user’s manual.

Electrostatic discharge protection

Caution. Removal of circuit boards by personnel not performing depot repair

will damage components and may void the warranty.

All drive electronic assemblies are sensitive to static electricity due to the electrostatically sensitive devices used within the drive circuitry. Although some devices such as metal-oxide semiconductors are extremely sensitive, all semiconductors, as well as some resistors and capacitors, may be damaged or degraded by exposure to static electricity.

Electrostatic damage to electronic devices may be caused by the direct discharge of a charged conductor, or by exposure to the static fields surrounding charged objects. To avoid damaging drive electronic assemblies, 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 and ST43402ND Reference Manual, Rev. C

Important safety information and precautions

Caution. Use forced-air ventilation when bench-testing the drive to ensure

proper cooling of drive components.

Use proper safety and repair techniques for safe, reliable operation of this unit. 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 contain warnings and cautions that must be carefully read and followed to minimize or eliminate the risk of personal injury. The warnings point out conditions or practices that may endanger you or others. The cautions point out conditions or practices that may damage the unit, possibly making it unsafe for use.

You must also understand that these warnings and cautions are not exhaustive. We cannot possibly know, evaluate, and advise you of all the ways in which maintenance might be performed or the possible risk of each technique. Consequently, we have not completed any such broad evaluation. If you use a non-approved procedure or tool, first ensure that the method you choose will 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.

• Use caution when troubleshooting a unit that has voltages present. 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” above.

ST43401N/ND and ST43402ND Reference Manual, Rev. C 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.

• Do not attempt to disassemble the HDA. It is not field repairable. If the sealed HDA is opened by personnel not performing depot repair, this will damage components and void the warranty.

• As a component, this drive is designed to be installed and operated in accordance with UL1950, IEC950, EN60950, CSA C22.2 950, and VDE0805. Refer to Section 2 for information about installation.

• Ensure that the power supply meets the specifications in this manual and is designed to be used in accordance with UL1950, 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 conditionally 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 where required by law. A necessary part of meeting safety requirements is the 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 and ST43402ND Reference Manual, Rev. C

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 available 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

Use a touch-tone telephone to access Seagate’s automated FAX system and select technical support information by return FAX. This service is available 24 hours a day, 7 days a week.

SeaFONE: (408) 438-8222

Technical sup port specialis ts are available from 8:00 A.M. to 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 8:00 A.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 computer

ST43401N/ND and ST43402ND Reference Manual, Rev. C vii

Location Telephone number

USA, Mexico, Latin America (408) 438-8771 England 44-62-847-8011 Germany 49-89-140-9331 Singapore 65-292-6973 Australia 61-2-756-2359 Canada (416) 856-5581 France 33-1-40-67-1034 Korea 82-2-556-7294

ST43401N/ND and ST43402ND Reference Manual, Rev. C 1

Section 1. General maintenance information

This section contains general information relating to maintenance of the drive. You should be familiar with the information in this section and with drive operation before attempting any maintenance procedures. Information is divided into the following areas:

• Maintenance tools and materials—lists the tools and materials required to perform maintenance on the drive

• Testing the drive—provides information concerning testing drive electronics, including a procedure for checking DC voltages supplied to the drive

• Identifying assemblies in the drive—identifies the various parts of the drive

Note. Refer to the user’s manual (publication 83327720) for information

about arranging for depot repair, removing and replacing a drive or power supply, and packing a drive for shipment.

Maintenance tools and materials

The procedures described in this section require the use of certain special tools, test equipment, and materials. These are listed below along with the Seagate part number. Note that the list includes only special tools. We assume that you have normal maintenance tools.

Description Seagate part number

Static ground wrist strap 12263496

6 1/2 to 8 inch wrist

Volt/ohmmeter Ballantine 345 or equivalent digital voltmeter

Testing the drive

During testing and troubleshooting, the drive normally performs various operations such as reading and writing test data. System software can be used to control the drive during these operations. Refer to manuals or other documentation applicable to the specific system or subsystem for information concerning the system software routines.

The drive also has built-in diagnostic tests. These diagnostic tests may be performed through the interface as described in Section 3.

2 ST43401N/ND and ST43402ND Reference Manual, Rev. C

The following procedure provides an overall check of the DC voltages used by the drive. Before performing this procedure, you should be familiar with the other information in this section and the safety information in the preface.

The illustration to the right shows where the individual voltages appear on the drive’s DC power connector (J15).

Insert your test probe into the contact openings on the back surface of the 4pin DC cable connector.

1. Using system software, command continuous read/write operations

DC Power Connector

J15

Insert Probe

Here

+12 V

Pin 1

+12 V

Return

Pin 2

+5 V

Return

Pin 3

+5 V

Pin 4

with the drive on a single cylinder.

2. Connect the voltmeter ground lead to J15 - Pin 3 (+5 V Return [Ground]).

3. Measure at the appropriate conn ec tion point to check the following

DC

Power

Cable

voltages:

Voltage Connection Specification

+5.0 volts J15 - Pin 4 +4.75 to +5.25 volts +12 volts J15 - Pin 1 +11.4 to +12.6 volts

Identifying assemblies in the drive

The drive’s major assemblies and components are shown in Figures 1 and 2. The components are supported by a chassis, and the head and disc assembly (HDA) is supported by shock mounts attached to the chassis. The control board is mounted above the HDA. The power board has a right-angle connection to one end of the control board. An optional bezel is available.

ST43401N/ND and ST43402ND Reference Manual, Rev. C 3

Control

Board

Option Jumpers and

Spindle Sync

Connector

Option

Jumpers

Option

Jumpers

Option

Jumpers

Pin 1

I/O

Connector

Head and Disc

Assembly (HDA)

DC Power Connector

Figure 1. ST43401N/ND drive components

Power Board

Optional

Bezel

Chassis

4 ST43401N/ND and ST43402ND Reference Manual, Rev. C

Control

Board

Spindle Sync

Remote Operator

Panel Connector

Port B

I/O Connector

Port B

Terminator

Power

Terminator

Figure 2. ST43402ND drive components

Connector

Option

Jumpers

Port A Power

I/O Board

Power

I/O

Board

Pin 1

I/O Connector

DC Power Connector

Port A

Option

Jumpers

Power

Board

Head and Disc

Assembly (HDA)

Optional

Bezel

Chassis

ST43401N/ND and ST43402ND Reference Manual, Rev. C 5

Section 2. Planning the system

This section supplements the installation instructions presented in the user’s manual (publication 83327720). To aid in configuring the drive for specific system requirements, the following subjects are discussed:

• Guidelines for enclosure design

• Guidelines for proper air flow

• Guidelines for I/O cabling

• Using the sweep cycle function

Guidelines for enclosure design

The drive is a component for installation in an enclosure that you have designed. The enclosure design must provide for mounting the drive and power supply, cable routing, and cooling. See the next topic for guidelines on providing proper cooling.

The system designer is responsible for obtaining any needed agency approvals such as UL, CSA, and VDE.

Figure 3 provides mounting dimensions for ST43401N/ND and ST43402ND drives without a bezel. Figure 4 provides the same information for ST43401N/ ND drives with the optional bezel attached. As described in the user’s manual, the drive can be mounted using either side-mounting screws or bottommounting screws.

6 ST43401N/ND and ST43402ND Reference Manual, Rev. C

6-32 Threads (4)

Side

Bottom

C.G.

6-32 Threads (4)

C.G.

M4 x .70 Metric Threads (4)

A B C D E F G H

I

J K L

3.25

0.86

0.39

1.93

3.120

8.60

5.50

5.75

0.12

3.96

1.58

3.13

± ± ± ± ± ± ± ± ± ± ± ±



0.01

0.005

0.03

0.01

0.05

0.05

82.55

21.84

9.91

49.02

79.25

218.44

139.70

146.05

3.05

100.58

40.13

79.50

Figure 3. Mounting dimensions for ST43401N/ND and ST43402ND drives

without a bezel

ST43401N/ND and ST43402ND Reference Manual, Rev. C 7

Side

Bottom

6-32 Threads (4)

C.G.

6-32 Threads (4)

C.G.

M4 x .70 Metric Threads (4)

H

A

3.25

B

0.86

C

0.39

D

1.87

E

3.120

F

8.00

5.50

± ± ± ± ±

max

±

0.01

0.02

0.005



0.01



82.55

21.84

9.91

47.50

79.24

203.20

139.70

5.75

I

0.12

J

0.06

K

3.38

L

5.88

M

0.19

N

3.90

O

1.58

3.13

0.01

±

0.01

±

0.02

±

0.02

±

0.01

±

0.01

±

0.05

±

0.05

±

0.05

±



Figure 4. Mounting dimensions for ST43401N/ND with a bezel

146.05

3.05

1.52

85.85

149.35

4.83

99.06

40.13

79.50

+ 33 hidden pages