Seagate HAWK 2 Installation Guide

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HAWK 2 Family:

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ST12400N/ND/NC

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ST11900N/ND/NC

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Installation Guide

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Contents

Introduction ........................................................ 1

Electromagnetic interference ............................ 1

Before you begin ................................................ 2

Installation overview .......................................... 7

Product repair information ................................ 9

Shipping ......................................................... 10

Product repair and return information............. 10

Technical support services ............................... 11

Drive specifications............................................ 14

Initial set-up information.................................... 17

Drive configuration.............................................23

Drive installation................................................. 33

Drive Setup ......................................................... 37

© 1994 Seagate Technology, Inc. All rights reserved
Publication Number: 77767451, Rev. C.
March 1994

Seagate®, Seagate Technology® and the Seagate logo
are registered trademarks of Seagate Technology, Inc.
HawkTM, SeaFAXTM, SeaFONETM, SeaTDDTM,
SeaBOARDTM are trademarks of Seagate Technology,
Inc. Other product names are registered trademarks or
trademarks of their own.

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 of Seagate Technology, Inc.

Hawk 2 Family Installation Guide, Rev. C 1

Introduction

Before attempting any installation, please read through
all applicable sections of this document, including all
warnings and cautions.

Warning. This equipment generates, uses, and can

radiate radio frequency energy and if not
installed in accordance with these instruc­tions, may cause interference to radio com­munications.

Electromagnetic interference (EMI) con­siderations

The drive(s) described herein, as delivered, are de­signed for system integration and installation into a
suitable enclosure prior to use. As such, the drive(s)
described herein are supplied as a sub-assembly and
are not subject to Subpart J of Part 15 of the FCC Rules
and Regulations nor the Radio Interference Regula­tions of the Canadian Department of Communications.
However, the unit has been tested using proper shield­ing and grounding and found to be compliant with the
Class A limits of the FCC Rules and the Regulations of
the Canadian Department of Communications.

2 Hawk 2 Family Installation Guide, Rev. C
The physical design characteristics of the drive(s)

described herein, serve to minimize EMI radiation
when installed in an enclosure that provides reason­able shielding. As such, the drive(s) are capable of
meeting the Class B limits of the FCC Rules and the
Regulations of the Canadian Department of Communi­cations.

Note. It is the end users' responsibility to assure that

the drive(s) described herein meet the appropri­ate EMI requirements of their system. Shielded
I/O cables may be required if the enclosure does
not provide adequate shielding. If I/O cables are
external to the enclosure, shielded cables should
be used, with the shields grounded to the enclo­sure and to the host controller.

Before you begin

Verify that the system is switched off and discon­nected from main power before any installation is
attempted.

Protect yourself, the drive, and your valuable pro­grams and data by reading the following cautions
and warnings.

Hawk 2 Family Installation Guide, Rev. C 3

• Do not unpack drive from its static shielded bag until
you are ready to install it in the system.

• Always handle the drive by the frame or casting.

• Do not touch printed circuit board (PCB) or the I/O
connector pins.

• Never apply pressure to the PCB or to the drive top
cover.

• Do not tamper with sealed top cover. Doing so voids
your warranty. The drive contains no user service­able components. See Product Repair section for
more information.

• Visually inspect the shipping container for any obvi­ous damage.

• Inspect drive for possible shipping damage. All claims
of this type should be filed promptly with the trans­porter involved. Save original packing materials to be
used when reshipping.

• Verify all parts listed on shipping bill are received with
the equipment. Discrepancies or damage should be
reported to the shipping company.

• When transporting or shipping a drive or system,
please ensure that they are correctly packed in
original Seagate approved (or equivalent) container
and shipped via an air-ride carrier experienced in
handling computer equipment.

4 Hawk 2 Family Installation Guide, Rev. C

Caution. The circuit assemblies and components con-

tained in this equipment can be degraded or
destroyed by Electrostatic Overstress (EOS)
or by Electrostatic Discharge (ESD).

Static electrical charges can accumulate
quickly on personnel, clothing and synthetic
materials. The electrostatic fields due to these
charges when brought in close proximity to
susceptible circuit assemblies and compo­nents, can result in degraded reliability or
immediate failure of the affected component
or assembly.

To insure optimum reliable equipment opera­tion, it is required that technical support per­sonnel discharge themselves by wearing a
grounding strap around the wrist and be
connected to a grounding terminal while work­ing in the vicinity of, and while handling EOS/
ESD susceptible assemblies/parts. If unavail­able, ground yourself frequently by touching
the metal chassis of the system before han­dling any components (this helps only if the
system is connected to a ground).

static-inducing carpeted areas.

dure is especially important when handling
printed circuit boards (PCBs).

Avoid

This proce-

Hawk 2 Family Installation Guide, Rev. C 5

Safety instructions

1. The disc drive(s) are to be installed in a customer

supplied enclosure where the surrounding air does
not exceed 50oC.

2. Four (4) 6-32 UNC-2A screws are required for

installation. Maximum screw length into side of
drive is 0.15 inches (3.81 mm). Maximum screw
length into bottom is 0.20 in. (5.08 mm). Maximum
screw tightening torque is 8.0 in-lb (0.90 NM) with
minimum thread engagement of 0.12 in. (3.0 mm).

3. The power requirements are shown in Section 1.0

Product Information.

4. The power supply must satisfy the safety require-

ments for SELV (Safety Extra Low Voltage) cir­cuits.

5. Service is to be provided by trained Seagate ser-

vice personnel.

6. The incorporation of the disc drives listed in this

guide into a customer enclosure must meet the
appropriate safety requirements of the country in
which it is used (e.g. UL 1950, CAN/CSA-C22.2
No. 950-M89, DIN VDE 0805/05.90 and EN60950:
1988 (IEC 950).

6 Hawk 2 Family Installation Guide, Rev. C

Sicherheitsanleitung

1. Däs Gerät ist ein Einbaugerät, vorgesehen für eine
maximale Umgebungstemperatur von 50oC.

2. Zur Befestigung der Drive werden 4 Schrauben
benötigt (6-32 UNC-2A). Die maximale Länge der
Schrauben in der unteren Seite des Chassis darf
nicht mehr als 0.20 in (5.08 mm) betragen, die in
der oberen 0.15 in (3.81 mm). Maximalle
Schraubenaziehung Von 8.0 in-lb (0.90 NM) mit
minimalem Gewindeansperuch 0.12 in. (3.0 mm).

3. Die Versorgungsspannungen werden im Kapitel

1.0 (Produkt Information) gezeigt.

4. Die Versorgungsspannung muss SELV entspre­chen.

5. Alle Arbeiten dürfen nur von ausgebildetem Seagate
Service-Personal durchgefürhrt werden.

6. Der Einbau des Drives muss den Anforderungen
gemäss DIN VDE 0805/05.90 oder EN60950: 1988
(IEC 950).

Hawk 2 Family Installation Guide, Rev. C 7

Installation Overview

Installation of the drive can be divided into distinct
phases as outlined below. Some of these may not be
applicable to your particular installation requirements.
Refer to the individual drive installation sections for
specific information on your drive model.

• Drive configuration: The user must select which of
the drive features are appropriate to enable for instal­lation in their system. This is done by way of the user
configuration jumpers found on the drive PCB.

• Mechanical installation: After setting up the drive
configuration the drive must be mechanically in­stalled into the host system and the power and
I/O cables attached. Previously mentioned precau­tions should be observed

• SCSI drives should not be defined in the CMOS:
The SCSI Host adapter has its own BIOS to handle
the Input/output procedures. The CMOS setting for
SCSI drive is either drive type zero, or the "no drive
installed" option.

8 Hawk 2 Family Installation Guide, Rev. C

• Low-level formatting: After the drive has been
properly configured for the system, it does not need
to be low-level formatted, as this has been done by
the factory and does not require this step during
installation. (The low-level format writes the sector
boundaries and track information to the drive). Defect
management information is read from the drive by the
host system when required in the installation proce­dure. If an installed drive is low-level formatted, all
user data stored on the drive will be lost.

Note. Seagate Technology assumes no liability for

lost user data.

• Partitioning and high level formatting: A drive
can be sub-divided into "partitions" which behave as
individual drives within the system. See your system
documentation. Present day drive installation pro­grams have menus that lead you through these
installation procedures.

Hawk 2 Family Installation Guide, Rev. C 9

Product repair information

Service requirements
The special facilities required for the manufacture of

these drives generally prohibit repair in the field. If
problems occur during installation, please contact your
supplier for assistance. Do not attempt to disassemble
or repair. Drives should be sent to the repair depot
through the purchase source, if possible. Please ob­serve the following cautions.

Caution.

• Handle drive with care. Do not drop or bump hard.

• Never remove the cover of these disc drives. Serv-
icing items in the sealed HDA (heads, media, actua­tor, etc.) require special facilities. The drive contains
no user purchasable parts or PCBs.

• Opening the sealed HDA voids the drive warranty.

• Applying a soldering device to the components on the
PCB voids the drive warranty.

10 Hawk 2 Family Installation Guide, Rev. C

• Place drive on a flat, static dissapative surface and
handle with extreme care. Always follow all EOS/
ESD precautions to avoid damage to he electrical
assemblies.

Shipping: When transporting or shipping a drive, a
Seagate approved container must be used. Keep your
original box. They are easily identified by the Seagate
Approved Package label. Shipping a drive in a non­approved container voids the drive warranty.

Seagate repair centers may refuse receipt of compo­nents improperly packaged or obviously damaged in
transit. Contact your Authorized Seagate Distributor to
purchase additional boxes. Seagate recommends ship­ping by an air-ride carrier experienced in handling

computer equipment.

Product repair and return information

Seagate customer service centers are the only facili­ties authorized to service Seagate drives. Seagate
does not sanction any third-party repair facilities. Any
unauthorized repair or tampering with the factory-seal
voids the warranty.

Warranty:

Contact your Seagate Authorized Distributor, Dealer
or other purchase source for warranty information.

Hawk 2 Family Installation Guide, Rev. C 11
If the drive is no longer under warranty contact pur-

chase source for repair information or refer to numbers
listed in the following paragraph .

Technical support services

Please contact your dealer for technical support and
installation troubleshooting. Product Technical Sup­port is available for all Seagate products by calling the
SeaFAX, SeaFONE or SeaBOARD services. These
are toll calls.

SeaFAX: 408/438-2620

You can use a Touch-Tone telephone to access
Seagate's automated FAX delivery 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

The enhanced phone system provides recorded tech­nical information on selected Seagate products while
you are on hold. Technical support specialists are
available to answer questions from 8:00 AM to 5:00PM
PST, Monday through Friday. Recordings are acces­sible 24 hours a day, 7 days a week.

12 Hawk 2 Family Installation Guide, Rev. C

SeaTDD: 408/438-5382

TDD is a Telecommunication Device for the Deaf
where two people can communicate using a keyboard
that is connected to the phone line. A TDD device is
required to access this service. This service is available
from 8:00 AM to 5:00 PM 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 eight data bits, no
parity and one stop bit (8N1).

Hawk 2 Family Installation Guide, Rev. C 13
With this service you can access:

• Specifications and jumper configurations for all
Seagate products.

• Reprints of Seagate documentation.

• A directory of information and helpful utilities that you
can download to your own computer.

BBS Modem Maximum
Location Number Baud Rate

United States 408-438-8771 9600
England 44-62-847-8011 9600
Germany 49-89-140-9331 2400
Singapore 65-227-2217 9600
Australia 61-2-756-2359 9600

Note: These are toll calls

14 Hawk 2 Family Installation Guide, Rev. C

Drive specifications

Product Hawk 2 Family
Information ST12400N/NC ST12400ND

Interface [7] SCSI-2 Fast SCSI-2 Fast
Cache Type Multi-segmented, 256 Kb
Capacity MB

Unformatted 2537 2537

Formatted [1] 2148 2148
Cylinders 2621 2621
Heads 19 19
Sectors/track (Avg.) 84 84
Recording method RLL (1,7) RLL (1,7)
Rev/min 5411 5411

Seek time (ms typ.)[2]

Average Read 9.0 9.0

Write 10.5 10.5

Operating environment

Ambient temp. [4] ------ 5oC to 50oC----­HDA max temp. [3] -----------60oC----------

Power requirements (Versorgungsspannungen)

+12 V+/-5% (Max [6] 1.0 A 1.0 A

(Max Start) [5] 2.0 A 2.0 A
+5 V +/-5% (Max) [6] 0.8 A 1.0 A

(Max Start) 0.8 A 0.9 A
Power Idle (Typ) 9.0 W 10 W

Oper. (Typ) 11.0 W 12 W

Hawk 2 Family Installation Guide, Rev. C 15

Product Hawk 2 Family
Information ST11900N/NC ST11900ND

Interface [7] SCSI-2 Fast SCSI-2 Fast
Cache Type Multi-segmented, 256 Kb
Capacity MB

Unformatted 2003 2003

Formatted [8] 1700 1700
Cylinders 2621 2621
Heads 15 15
Sectors/track (Avg.) 84 84
Recording method RLL (1,7) RLL (1,7)
Rev/min 5411 5411

Seek time (ms typ.)[2]

Average Read 9 9

Write 10.5 10.5

Operating environment

Ambient temp. [4] ------5oC to 50oC-----­HDA max temp. [3] -----------60oC----------

Power requirements (Versorgungsspannungen)

+12 V+/-5% (Max [6] 1.0 A 1.0 A

(Max Start) [5] 2.0 A 2.0 A
+5 V +/-5% (Max) [6] 0.8 A 1.0 A

(Max Start) 0.8 A 0.9 A
Power Idle (Typ) 9.0 W 10 W

Oper. (Typ) 11.0 W 12 W

16 Hawk 2 Family Installation Guide, Rev. C

Notes.

[1] Standard Hawk 2 units are factory formatted with

512 data bytes per sector with twelve spare sectors
per cylinder and 2 cylinders at inner tracks re-

served for spares in addition to capacity listed.
[2] Does not Include on-board controller overhead.
[3] Maximum measured at any location on top cover.
[4] For best reliability keep below 35oC (95oF).
[5] A droop of up to -10% is permissible for a maximum

of 10 seconds at power up. (abfall van -10% is

erlaubt für 10 Sekunden max).
[6] Measured with an average reading DC ammeter.

Instantaneous +12 V current peaks will exceed

these values.
[7] Can be commanded to operate according to SCSI-

1 protocol.
[8] Standard ST11900 units are factory formatted with

512 data bytes per sector with six spare sectors per

cylinder and 2 cylinders at inner tracks reserved for

spares in addition to capacity listed.

Hawk 2 Family Installation Guide, Rev. C 17

Initial setup information

For the initial setup connect the cables, set the SCSI
bus address and remove, install, or leave as is the SCSI
I/O line terminator resistor packs. These procedures
are described in paragraphs following. Before continu­ing, note whether drive model number letter suffix
contains N, ND or NC.

SCSI interface cable connection

Hawk 2 family model drives are SCSI interface drives.
System connection is via a 50 pin, SCSI connector,
except for "NC" models which have an 80 pin combined
SCSI I/O and power connector, Pin 1 is noted in Figure
1 for the 50 pin connector. Some cables have a con­trasting color stripe on one edge to indicate pin 1.
Because of the non-symmetrical shape of the 80 pin
connector there is only one way that it can mate with the
input connector. Strain relief is recommended for the
cable.

Do not block system cooling air flow in routing of

cables.

18 Hawk 2 Family Installation Guide, Rev. C

SCSI address selection

On "N/ND" drives, make sure that the SCSI bus ad­dress jumper(s) are properly set for the bus address
assigned to the drive. See figures at beginning of
Section 3 showing the bus address select header and
the jumper configurations that select addresses 0
through 7. Typically the primary boot device is set to ID
0, and the subsequent SCSI drives are jumpered in
ascending order. Bus addresses 0 through 6 should be
used (the host adapter usually uses address 7). If the
drive LED shows no on/off activity when the host is
trying to communicate with it, an incorrect bus address
selection at the drive should be suspected.

On "NC" model drives the SCSI ID can be, and presum­ably will be set over the 80 pin interface by the host
computer. Unless directed to do so by the host system
documentation, no jumpers should be installed for
address selection. On "NC" models, the host has also
complete control over motor start functions, so no
motor start or delayed motor start jumpers should be
installed.

Hawk 2 Family Installation Guide, Rev. C 19

Resistor terminator packs

If you are installing a single drive, the Terminator
Enable (TE) jumper must be installed. See option
select jumper header in Figure 2a . If you are installing
multiple hard disc drives, remove the Terminator En­able (TE) jumper from all the drives but the one
connected to the end of the SCSI I/O cable.

Model numbers that end in "ND" have differential I/O
circuits and these drives have no provisions for termi­nators that plug into the drive PCB. The user, systems
integrator or system manufacturer must provide some
external means of I/O line termination.

Read/write head auto-park

Seagate disc drives described herein park the heads
automatically at power off. This feature requires no
operator intervention.

20 Hawk 2 Family Installation Guide, Rev. C

Optional parity bit enable

Some systems require parity bit checking. Consult the
system documentation for the specific requirements.
See figures in Section 3 for location of Parity Bit Enable
jumper. Jumper-on enables parity reporting by the
SCSI bus.

DC power connection

Drive model numbers terminating with "N" or "ND"
receive DC power through a 4 pin connector mounted
on the PCB next to the SCSI I/O connector. See Figure

1.
Drive models terminating in "NC" receive DC power

through the 80 pin I/O connector from the host com­puter. No separate DC power connection is available
on the drive.

Hawk 2 Family Installation Guide, Rev. C 21

Pin 1

SCSI I/O

Connector

J4

Pin 1

DC Power
Connector

J6

*

J5

J1

Pin 1 End

J2

I/O Terminator Module

("N" models only)

(not removable)

J1

*

4 3 2 1

Pin

1
2
3
4

Power

+12V
+12V ret
+ 5V ret
+ 5V

* "NC" model drives have a single, 80 pin I/O connector

that also provides DC power. It does not have J5.

Figure 1a. "N" and "ND" model drives physical inter­ face (50 pin SCSI I/O connector)

80 Pin

SCSI I/O

Connector

J4

J6

J2

Pin 1

22 Hawk 2 Family Installation Guide, Rev. C

Figure 1b. "NC" model drive physical interface (80 pin

I/O and DC power connector)

Hawk 2 Family Installation Guide, Rev. C 23

Drive configuration

Each disc drive has option select header connectors on
the sides and front where jumper plugs are installed to
select the way that the drive is to be configured or to
select its ID on the I/O bus.

SCSI I/O drives

On SCSI I/O model "N/ND" drives either J6 (on the front
of the drive) or J5 (on the side behind the SCSI I/O
connector) may be used to set the drive ID. To avoid
possible incorrect ID setting, do not use both J5 and J6
for ID selection. The following figures show where
these headers are located on the different drives cov­ered by this manual. There are notes following where
explanations are given about the purpose of each
jumper and specify the standard factory (called "de­fault") settings of these jumpers (i.e., settings used for
most common single drive application). Changes to
these settings should be made only if it is known that the
system requires a different configuration.

SCSI model "NC" drives do not have J5 for ID selection.
The ID signals come in the 80 pin I/O connector, so
drive ID selection can be made over the interface from
the host. J6 can be used but probably is not to be used.

See Figure 2b

DC Power
Connector

J2

Drive Front

Pin 1

End

J6

J5

Pin 1

SCSI I/O

Connector

J1

Pin 1

J2

Pin 1

HDA

Drive with HDA up,

PCB down,

viewed from front

J6

A2A1A

0

SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

SCSI ID = 7

Sync

Spindle
Remote

LED

Delay

Motor Start

Enable

Motor Start

Write Protect

Parity Option

Term. Power

from Drive

Term. Power

to SCSI Bus

Term. Power

from SCSI Bus

Jumper

Positions

Position A

Reserved

R
ESDSMEWPPETETPT

P

Enable

Terminators

S
S
P

L
E
D

R
E
S

Reserved

CATH

3
4

*

**

24 Hawk 2 Family Installation Guide, Rev. C

* PCB part number label here
** See Note [2] following Figure 2c.

Figure 2a. Drive configuration for Hawk 2 family

N/ND model

Hawk 2 Family Installation Guide, Rev. C 25

DC Power
Connector

J2

Drive Front

Pin 1

End

J6

J5

Pin 1

SCSI I/O

Connector

J1

1 2 3

Pin 1

HDA

Side View of Drive

J1

SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

SCSI ID = 7

J5

A0A1A

2

*

**

**

* PCB part number label here
** See Note [2] following Figure 2c.

Figure 2b. Drive configuration for Hawk 2 family

N/ND model

J2

Drive Front

Pin 1

End

J6

80 Pin
SCSI I/O 
Connector

Pin 1

J2

Pin 1

HDA

Drive with HDA up,

PCB down,

viewed from front

J6

A2A1A

0

SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

SCSI ID = 7

Sync

Spindle

Remote

LED

Delay

Motor Start

Enable

Motor Start

Write Protect

Parity Option

Term. Power

from Drive

Not Used

Not Used

Jumper

Positions

Reserved

R
ESDSMEWPPETETPT

P

Enable

Terminators

S
S
P

L
E
D

R
E
S

Reserved

CATH

3
4

*

U5

**

**

26 Hawk 2 Family Installation Guide, Rev. C

* See Note [2] following this figure.
** These two functions apply only on "NC" drives that

have terminator module U5 installed (factory installed

only).

Figure 2c. Drive configuration for Hawk 2 family

NC model

Hawk 2 Family Installation Guide, Rev. C 27

Notes for Figure 2a, 2b and 2c:

[1] Notes explaining the functions of the various

jumpers on jumper header connectors J2, J5 and
J6 are given below in left to right order of jumper
position. The term "default" means as standard
OEM units are configured when shipped from
factory. "Off" means no jumper is installed; "On"
means a jumper is installed. Off or On underlined
is factory default condition.

[2] The PCB on "NC" models does not have connector

J5, and has a single 80 pin combined SCSI I/O and
DC power connector instead of the normal 50 pin
SCSI I/O and 4 pin DC power connectors. Included
among the 80 pins are the SCSI ID, Motor Start and
Delayed Motor Start select functions, and the syn­chronous spindle master sync signal and the re­mote LED signals. Do not use J2 and J6 for these
five functions if the host uses the ones included in
the 80 pin connector.

28 Hawk 2 Family Installation Guide, Rev. C

J2 Jumper
Installation Jumper Function Description
RES

Off/On Reserved. Default is no jumper installed.

DS ME

Off Off Spindle starts immediately after power up -

Default setting.

Off On Drive spindle does not start until Start Unit

command received from host.

On Off Spindle Startup is delayed by SCSI ID times

12 seconds after power is applied, i.e., drive
0 spindle starts immediately when DC power
connected, drive 1 starts after 12 second
delay, drive 2 starts after 24 second delay,
etc.

On On Drive spindle starts when Start Unit com-

mand received from host. Delayed start
feature is overridden and does not apply
when ME jumper is installed.

WP

On Entire drive is write protected.
Off Drive is not write protected. Default is no WP

jumper installed.

PE

On Parity checking and parity error reporting by

the drive is enabled. Default is PE jumper
installed.

Off Drive does not report result of parity check-

ing to host.

Hawk 2 Family Installation Guide, Rev. C 29

J2 Jumper
Installation Jumper Function Description
TE

On With the jumper installed, the On-board (non-

removable) terminator circuits are enabled
(connected to the I/O lines). Default is jumper
installed only on "N" models and "NC" mod­els having factory installed terminator mod­ule U5.

Off Terminator circuits not connected to I/O

lines.

TP TP

Off Off No terminator power is connected to drive

terminators or SCSI bus I/O pin 26.

On Off Drive supplies its own terminator power

only. Jumper on this position is factory de-
fault only for "N" models and "NC" models
that have terminator module U5 (factory
installed only).

Off On Jumper in this position is default for "ND"

drives. Drive supplies power only to I/O pin
26 of SCSI bus. When drives have differen­tial I/O circuits, a jumper on the right TP
position may be needed to power external
terminators (see system documentation).
The ND model drives have differential I/O
circuits which have no terminator circuits on
the drive.

On On Drive supplies terminator power to itself

(internal connection) and to I/O pin 26 of
SCSI bus. This is a legal jumper setting.

30 Hawk 2 Family Installation Guide, Rev. C

TP Position A

On This horizontally positioned jumper across

the two TP positions nearest PCB edge,
connects terminator power from SCSI bus I/
O pin 26 to the drive's internal terminators
(for single-ended I/O only).

Off See above explanations for TP jumpers.

J5 Jumper
Installation Jumper Function Description
1,2,3 Drive ID on SCSI Bus (J6 may be used

instead).

(A0,A1,A2) The drive ID is binary coded positionwise i.e.,

jumper in position A2 is drive ID 4, in position A
is ID 2, position A0 is ID 1 and no jumpers is ID
0, Default is ID = 0. "NC" drives do not have J5.

1

Hawk 2 Family Installation Guide, Rev. C 31

J6 Jumper
Installation Jumper Function Description
1,2,3 Drive ID on SCSI bus. Either J5 or J6 (optional)
(A2,A1,A0) may be used to select drive ID. Both should not

be used at the same time, because at some
future time when the ID is changed the user
could fail to configure both J5 and J6 the same.
(See note [2]).

SSP A jumper is installed when not used as a cable

connection for the reference index signal
(REFIND+) (J6 Pin 6, bottom) for sync spindle
feature. J6 pin 5 is GRD.

LED No jumper ever installed. These pins used to

connect a cable for a remote LED indicator.
Pin 3 (top, nearest HDA), the anode connec­tion, connects in the drive to the +5V supply
through a pull-up resistor. Pin 4 (bottom), the
cathode connection connects in the drive to
signal common through the emitter-collector
junction of a transistor switch that controls the
LED on/off condition.

32 Hawk 2 Family Installation Guide, Rev. C

Master Sync

Source

Host

(or other drive)

Spindle
Control

Drive 1

+5V

R

T

J6

4

3

Spindle
Control

Drive 2

+5V

R

T

J6

4

3

Spindle
Control

Drive n

+5V

R

T

J6

4

3

Sync Interface

SCSI Bus

System

Interface

REFIND +

J1

37
[2]

[1]

J1

37
[2]

[1]

J1

37
[2]

[1]

[1] Configuration select header. See Figure 2.
[2] Applies to "NC" models only.

Figure 3. Synchronized spindle interconnection

diagram for Hawk 2 family

Hawk 2 Family Installation Guide, Rev. C 33

Drive installation

This section describes the physical mounting of the
drive in the host cabinet and the logical installation as
a system member, which is called drive setup.

Disc drive mounting

Do not touch the connector pins or any PCB compo­nents without observing static-discharge precautions.
Always handle the drive by the frame only.

The drive may be mounted in any orientation. Drive
models with the "NC" suffix may plug directly into a
permanently mounted connector, in which case there is
only one orientation that is correct. Note the shape of
both Drive and host system connectors and orient drive
to allow it to properly plug in.

34 Hawk 2 Family Installation Guide, Rev. C

• Mount to host system chassis using four 6-32 UNC

screws. Three mounting holes are in each side and
four in the bottom of the drive. See Figure 4. The
maximum length that the screws should extend into
the side chassis mounting holes is 0.150 inch (3.81
mm), and 0.20 inch (5.08 mm) into bottom holes,
measured from the outer surface of the chassis. The
minimum thread engagement for all mounting screws
is .12 inch (3.0 mm). Tighten the screws evenly to a
maximum torque of 8 in-lb. Do not over tighten or
force when screw does not seem to screw in easily
(threads not correctly engaged).

• Verify that all connections between the drive and the

host system are correctly installed. Most cables have
a contrasting color stripe indicating pin 1. Pin 1 on the
drive I/O connector and the DC power connector are
indicated in Figure 1. The "NC" drive 80 pin I/O
connector is keyed by virtue of its shape.

• Verify option select and drive ID select jumpers and

installation of terminator resistor packs where appli­cable. See Sections 2 and 3.

Hawk 2 Family Installation Guide, Rev. C 35

Do not power up the host system until the drive is
mounted and the system cover is replaced.

• Connect DC power connector to the drive, except on
"NC" model drives which do not have a separate DC
power connector.

• Replace the Host System cover.

• Turn on DC power.

• Boot the system from the floppy drive or from a
previously installed hard-drive if there is one.

• Proceed with drive setup of the new hard drive.

Grounding

Signal ground (PCB) and HDA ground are connected
together in the Hawk 2 family of drives and cannot be
separated by the user. The equipment in which the
drive is mounted is connected directly to the HDA and
PCB with no electrically isolating shock mounts. If it is
desired for the system chassis to not be connected to
the HDA/PCB ground, the systems integrator or user
must provide a nonconductive (electrically isolating)
method of mounting the drive in the host equipment.

36 Hawk 2 Family Installation Guide, Rev. C

A

F

D

E

C

[1]

[3]

B

G

J

H

K

[2]

Notes:

[1] Mounting holes three on each side, 6-32 UNC. 
Max screw length into side of drive 0.15 in. 
(3.81 mm). See "Disc Drive Mounting" paragraph.

[2] Mounting holes four on bottom, 6-32 UNC. 
Max screw length into bottom of drive 0.20 in. 
(5.08 mm). See "Disc Drive Mounting" paragraph.

[3] Power and interface connections may extend 
past the "A" dimension by 0.040 in. (1.02 mm).

[4] On "NC" model drives the I/O and DC power 
are combined in a single 80 pin connector 
(not shown), which is centered within ±0.20 in. 
(.51 mm) side to side on the PCB.

Inches Millimeters

5.74 

4.00 

1.62 

2.362
.620

4.000
.250

1.750

3.750

2.370

145.80

101.60

41.15

60.00

15.75

101.60

6.35

44.45

95.25

60.20

A
B
C
D
E
F
G
H

J

K

[4]

Figure 4. Hawk 2 family drive mounting dimensions

Hawk 2 Family Installation Guide, Rev. C 37

Drive setup

SCSI interface drives

The SCSI interface handles both drive geometry and
defect management internally or the "no drive installed"
option can be selected for systems with SCSI drives.

All SCSI interface drives are low-level formatted at the
factory. If you wish to low-level format the drive to
optimize its performance for your system, consult the
controller documentation for information on low-level
formatting. Partitioning and high-level formatting can
be done through DOS by way of the FDISK utility for
partitioning, and FORMAT for high-level formatting.
Consult your DOS manual for FORMAT and FDISK
command options.

Warning. If an installed drive is low-level format-

ted, all user data stored on the drive is
lost.

Seagate Technology assumes no liability for lost
user data.

Seagate Technology, Inc.
920 Disc Drive
Scotts Valley, CA 95066-4544, USA

Publication Number: 77767451, Rev. C
Printed in USA