Seagate ST34555W, ST34555N/W, Hawk 4XL ST34555N, Hawk 4XL ST34555W Product Manual

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Hawk 4XL Family:

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ST34555N/W

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Product Manual, Volume 1

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Hawk 4XL Fa mily:

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ST34555N/W

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Product Manual, Volume 1

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© 1997, 1998 Seagat e Technology, Inc. All rights reserved

Publication number: 77767508, Rev. A

January 1998

Seagate , Seagate Technology , and the Seagate logo are registered trademarks of Seagate T ech­nology, Inc. Hawk, SeaFAX, SeaFONE, SeaNET, SeaTDD, and SeaBOARD are either trade­marks or registered trademar ks of Seagate Technology, Inc. or one of its subsidiaries. All other
trademarks or registered trademarks are the property of their respective 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 of Seagate Technol-

ogy, Inc.

Revision status summary sheet

Notice.
This manual is volume 1 of a two-volume document with the SCSI interface information in the Volume 2

SCSI Interface Product Manual

, part number 77738479.

If you need the SCSI in terface information, order the volume 2

SCSI Interface Product Manual

, part

number 77738479.

Revision Date Writer/Engineer Sheets Affected

A 01/05/98 D . Ashby/D. Ernst 1/1, v thru viii, 1 thru 70.

Hawk 4XL Prod uct Manual, Rev. A v

Contents

1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0 Applicable standards and reference documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1.1 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1.2 Electromagnetic susceptibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Electromagnetic compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.3 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.0 General descr iption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Standard features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Media characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.4 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.5 Unformatted and formatted capacit ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.6 Programmable drive capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.7 Factory installed accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.8 Options (factory installed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.9 Accessories (user installed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.0 Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Internal drive characteristics (transparent to user) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2 SCSI Seek performance characteristics (visible to user). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2.1 Access time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2.2 Format comm and exec ution time (minutes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.2.3 Generalized performance characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.3 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.4 Prefetch/multi-segmented cache control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.5 Cache operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.5.1 Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.5.2 Prefetch operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.0 Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1 Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.1 Environmental interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.2 Read errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.3 Write errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.4 Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2 Reliability and service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6

5.2.1 Mean time bet ween failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.2 Preve ntive maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.3 Service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.4 Service philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.5 Service tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.6 Hot plugging Hawk 4XL disc drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.7 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.8 Product warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.0 Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.1 AC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.2 DC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.2.1 Conduct ed noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.2.2 Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.2.3 12 V - Current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.3 Power dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1

6.4 Environmental limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.4.1 Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

vi Hawk 4XL Product Manual, Rev. A

6.4.3 Effective altitude (sea level). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

6.4.6 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

6.4.7 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

6.5 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

7.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

7.1 Drive internal defects and errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

7.2 SCSI systems errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

8.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1

8.1 Drive ID/option select header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

8.1.1 Notes for Figures 8, 9, 10 and 11.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

8.1.2 Function description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

8.2 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

8.3 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

8.3.1 Air flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

8.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

8.5 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 9

9.0 Interface requiremen ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.1 General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.2 SCSI interface messages supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.3 SCSI interface commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

9.3.1 Inquiry Vital Product data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

9.3.2 Mode Sense data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

9.4 SCSI bus conditions and miscellaneous features supported . . . . . . . . . . . . . . . . . . . . . . . . .48

9.5 Synchronous data trans fer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.5.1 Synchro nous data transfer periods supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.5.2 REQ/ACK offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.6 Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.6.1 DC cable and connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.6.2 SCSI interface physical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

9.6.3 SCSI interface cable requiremen ts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

9.6.4 Mating connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

9.7 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

9.7.1 “Single-ended drivers /receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

9.8 Terminator requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

9.9 Terminator power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

9.10 Disc drive SCSI timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

10.0 Seagate technical support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Hawk 4XL Product Manual, Rev. A vii

List of Figures

Figure 1. Hawk 4XL family drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Hawk 4XL family drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figu r e 3 . T ypical Hawk 4XL family drive + 5 V and +12 V curren t p r o file . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 4. Locations of printed circuit board (PCB) components listed in Table 3 . . . . . . . . . . . . . . . . . 22

Figure 5. Recommended mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 6. Mounting configuration dimensions for models “N” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 7. Mounting configuration dimensions for models “W” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 8. Hawk 4XL family drive ID select header for model “N”. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 9. Hawk 4XL family drive ID select for model “W” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 10. Hawk 4XL family drive ID select header J1-auxiliary for model “W” (J1-Auxiliary

Pins 1A - 12A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 11. Hawk 4XL family drive option select header for models “N” and “W”. . . . . . . . . . . . . . . . . . . 35

Figure 12. Air flow (suggested) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 13. Physical interface for “N” model drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 14. Physical interface for “W” model drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 15. SCSI daisy-chain interface cabling for “N” and “W” model drives . . . . . . . . . . . . . . . . . . . . . 54

Figure 16. Nonshielded 50 pin SCSI device connector used on “N” model drives . . . . . . . . . . . . . . . . . 55

Figure 17. Non-shielded 68 pin SCSI device connector used on “W” model drives . . . . . . . . . . . . . . . . 56

Figure 18. Single-ended transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Hawk 4XL Prod uct Manual, Rev. A 1

1.0 Scope

This manual describes the Seagate Tec hnolo gy®, Inc. Hawk 4XL™ disc drives.
Hawk 4XL drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-2,

and SCSI-3 (Fast-20) interface specifications to the extent described in this manual. The

SCSI Interface Prod-

uct Manual

(part number 77738479) describes general SCSI interface characteristics of this and other families

of Seagate drives.
From this point on in this product manual the reference to Hawk 4XL models is referred to as “t he drive” (unless

references to individual models are necessary).

.

*Model “N” version with 50 pin SCSI I/O connector

Figure 1. Hawk 4XL family drive

*

Hawk 4XL Prod uct Manual, Rev. A 3

2.0 Applicable standards and reference documentation

The drive has been developed as a system peripheral to the highest standards of design and construction. The
drive depends upon its hos t equipment to provide adeq uate power and environment in order to a chieve opti­mum performance and compliance with applicable industry a nd governmental regulations. Special attention
must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regu­lation. In par ticular, the drive must be securely m ount ed in o rder to guarante e th e spec ified pe rformanc e char­acteristics. Mounting by bottom holes must meet the requirements of Section 8.4.

2.1 Standards

Hawk 4XL family drives comply with Seagate standards as noted in the appropriate sections of this manual and
the Seagate

SCSI Interface Product Manual

, part number 77738479 (Vol. 2).

Hawk 4XL disc drives a re UL recognized com ponents per UL1950, CSA certified to CSA C22.2 No. 950-M89,
and VDE certified to VDE 0805 and EN 60950.

2.1.1 Electromagnetic compatibility

The drive, as delivered, is designed f or system integration and installation into a suitable enclosure prior to use.
As such the drive is supplied as a subassembly and is not subjec t to Subpart B of Part 15 of the FCC Rules
and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications.

The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides
reasonable shielding. As such, the drive is capable of meeting the Class B limits of the FCC Rules and Regula­tions of the Canadian Department of Communications when properly packaged. However, it is the user’s
responsibility to assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O
cables may be required if the enclosure do es not provide adeq uate shielding. If the I /O cables are extern al to
the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host con­troller.

2.1.2 Electromagnetic susceptibility

As a component assem bly, the drive is not required to me et any suscep tibility perform ance requi rements. It is
the responsibility of those integrating the dri ve within their systems to perform t hose t ests req uired a nd des i gn
their system to ensure that equipm ent operating in the same system as the drive or external to the system
does not adversely affect the perf ormance of the drive. S ee Section 5.1.1 and Table 2, DC power requirements.

2.2 Electromagnetic compliance

Seagate uses an independen t laboratory to confirm com pliance to the directives/standard(s) for CE Marking
and C-Tick Marking. The drive was tested in a representative system for typical applications. The selected sys­tem represents the most popular characteristics for test platforms. The system configurations include:

• 486, Pentium, and PowerPC microprocessors

• 3.5-inch floppy disc drive

• Keyboard

• Monitor/display

• Printer

• External modem

•Mouse
Although the test system with this Seagate m odel com pli es to the direct ives/standard(s), we cannot guarantee

that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance
and provide CE Marking and C-Tick Marking for their product.

Electromagnetic compliance for the European Union

If this model has the CE Marking it complies with the European Union requirements of the Electromagnet ic
Compatibility Directive 89/336/EEC of 03 M ay 198 9 as amended by Directive 92/31/EEC of 28 A pri l 19 92 a nd
Directive 93/68/EEC of 22 July 1993.

4 Hawk 4XL Product Manual, Rev. A

Australian C-Ti ck

If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548 1995
and meets the Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Man­agement Agency (SMA).

2.3 Reference documents

Hawk 4XL Installation Guide: Seagate P/N 77767507
SCSI Interface Product Manual: Seagate P/N 77738479
ANSI Small Computer System Interface (SCSI): ANSI3.131-1986 (X3T9/84.40 Rev. 1B)

(X3T9.2/82-2 Rev. 17B), X3T9.2/86-109 Revision 10H (SCSI-2), X3T9.2/91/010 Rev. 10 (SCSI-3) parallel inter­face, X3T9.2-184 Rev. 4 (SCSI-3) and ANSI SCSI-3 Fast-20, X3T10/1071D.

Package Test Specification Seagate P/N 30190-001 (under 100 lb.)
Package Test Specification Seagate P/N 30191-001 (over 100 lb.)
Specification, Acoustic Test Requirements : Seagate P/N 30553-001
In case of conflict between this document and any referenced document, this document takes precedence.

Hawk 4XL Prod uct Manual, Rev. A 5

3.0 General description

Hawk 4XL drives combine magnetoresistive (MR) heads, partial response/maximum likelihood (PRML) read
channel electronics, embedded servo technology, and a SCSI-3 (Fast-20) interface to provide high perfor­mance, high capacity data storage for a variety of systems including engineering workstations, network serv­ers, mainframes, and supercomputers.

Fast-20 (also known as Ultra SCSI) is a negotiated transfer rate. This transfer rate will occur only if your host
adapter also supports Fast-20 data transfer rates. This drive also operates at SCSI-1 and SCSI-2 data transfer
rates for backward compatibility with non-Fast-20 capable SCSI host adapters.

Table 1 lists the features that differentiate the various Hawk 4XL SCSI-3 Fa st-20 (Ultra SCSI) models.

Table 1: Drive model number vs. differentiating features

The drive records and recovers data on 3.5-inch (86 mm) non-removeable discs.
The drive supports the S mall Computer System Interface (SCSI) as describ ed in the ANSI SCSI-2 interface

specifications to the extent described in this manual (volume 1), which defi nes the product performanc e char­acteristics of the Hawk 4XL family of drives, and the

SCSI Interface Product Manual

(volume 2), par t number
77738479, which describes the general interface characteristics of this and other families of Seagate SCSI
drives.

The drive’s interface supports multiple initiators, disconnect/reconnect, self-configuring host software, and
automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets
(logical block addressing is used).

The head and disc assembly (HDA) is sealed at the factory. Air circulates within the HDA through a non­replaceable filter to maintain a contamination-free HDA environment.

Refer to Figure 2 for an exploded view of the drive. This exploded view is for information only—never disassem­ble the HDA and do not attempt to service items in the sealed enclosure (heads, med ia, actuator, etc.) as this
requires special facilities. The drive contains no replaceable parts. Opening the HDA voids your warranty.

Hawk 4XL drives use a dedicated landing zone at the innerm os t radius of the media to elimin ate the possi bilit y
of destroying or degrading data by landing in the data zone. The d rive automatically goes to the landing zone
when power is removed.

An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur­ing shipping and handling. The shipping lock autom atically diseng ages when power is applied t o the drive and
the head load process begins.

Hawk 4XL drives decode track 0 location data from the servo data embedded on ea ch surface to eliminate
mechanical transducer adjustments and related reliability con ce rns.

Model number

Number
of heads I/O circuit type

Number of I/O
connector pins

Number of I/O
data bus bits

ST34555N 8 single-ended 50 8
ST34555W 8 single-ended 68 16

6 Hawk 4XL Product Manual, Rev. A

A high-performance actuator assembly with a low-inertia, balanced, patented, st raight-arm design provides
excellent performance with minimal power dissipation.

Figure 2. Hawk 4XL family drive

Hawk 4XL Prod uct Manual, Rev. A 7

3.1 Standard features

The Hawk 4XL family has the following standard features:

• Integrated SCSI controller

• Single-ended SCSI drivers and receivers

• 8 bit and 16 bit I/O data bus models available

• Asynchronous and synchronous data transfer protocol

• Firmware downloadable via SCSI interface

• Selectable even byte sector sizes from 180 to 4,096 bytes/sector

• Programmable drive capacity

• Programmable sector reallocation scheme

• Flawed sector reallocation at format time

• Programmable auto write and read reallocation

• Reallocation of defects on command (Post format)

• 128-bit Reed-Solomon error correcting code

• Sealed head and disc assembly

• No preventative maintenance or adjustment required

• Dedicated laser textured head landing zone

• Embedded servo data rather than a separate servo data surface

• Self diagnostics performed when power is applied to the drive

• 1:1 Interl eave

• Zoned bit recording (ZBR)

• Vertical, horizontal, or top down mounting

• Dynamic spindle brake

• Active IC terminators enabled by jumpers

• 512 K byte data buffer

• SCAM (SCSI Configured AutoMagically) plug-n-play level 2 compliant, factory set to lev el 1 (not user select-

able)

• Low audible noise for office environment

• Low power consumption

• Audio Visual (A/V) ready

3.2 Media characteristics

The media used on t he drive has a diameter of app roximately 3 .5 inches (86 m m ). The alum inum s ub strate is
coated with a thin film magnetic material, overcoated with a proprietar y protec tive layer for improved durability
and environmental protection.

3.3 Performance

• Supports industry standard Ultra SCSI interface (also called “Fast-20 SCSI”)

• Programmable multi-segmentable cache buffer

• 7200 RPM spindle. Average latency = 4.17 ms

• Command queuing of up to 64 commands

• Background processing of queue

• Supports start and stop commands (spindle stops spinning)

3.4 Reliability

• 800,000 hour MTBF

• LSI circuitry

• Balanced low mass rotary voice coil actuator

• Incorporates Seek To Improve Reliability algorithm (STIR)

• 3-year warranty

8 Hawk 4XL Product Manual, Rev. A

3.5 Unformatted a n d formatted capac iti es

Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per
sector. The following table shows t he st andard OEM model read capacity data. Total LBAs = read capacity data
shown below + 1.

Notes.

[1] Sector size selectable at format time. Users having the necessary equi pment may modify the data block

size before issuing a forma t command and ob tain different formatted capacities than those listed. User
available capacity depends on spare reallocation scheme selected. See Mo de S elect C ommand and For­mat Command in the

SCSI Interface Product Manual

(part number 77738479).

3.6 Programmable drive capacity

Using the Mode Select command, the drive can change its capacity to something less than maximum. See
Table 5.2.1-13 in the

SCSI Interface Product Manual

(part number 77738479). Refer t o the Parameter list block
descriptor, bytes 1, 2 and 3. A value of zero in bytes 1, 2 and 3 indicat es that the drive shall not change the
capacity it is currently formatted to have. A n umber in bytes 1, 2 and 3 that is less than the maximum number of
LBAs changes the total drive capacity to the value in the bloc k descriptor bytes 1, 2 and 3. A value greater than
the maximum number of LBAs is rounded down to the maximum capacity.

3.7 Factory installed accessories

OEM Standard drives are shipped with

Hawk 4XL Installation Guide

(part number 77767507) unless otherwise
specified. The factory also ships with the drive a s mall bag of the two jump er plug types used for the J6, J2,
and J1-Aux option select jumper headers.

3.8 Options (factory installed)

All customer reques ted options are inco rporated during prod uction or packaged at the manufactur ing facility
before shipping. Some of the options available are:

• The capacities shown in Section 3.5. You can order other capacities by selecting other sparing schemes and

sector sizes.

• Single unit shipping pack. The drive normally ships in bulk packaging to provide maximum protection against

transit damage. Units shipped in dividually require additional protection as provided by the singl e unit ship­ping pack. Specify this option if you are planning to ship single units to your customers.

•The

Hawk 4XL Installation Guide

(part number 77767507) is usually included with each standard OEM drive.

You may order additional copies of this publication.

3.9 Accessories (user installed)

The following accessories are available. Qualified individuals can install these accessories in the field.

• Front panel kit (with green rectangular LED lens), part number 73501451.

• Single unit shipping pack.

•

Hawk 4XL Installation Guide

(part number 77767507).

Model

Formatted [1]
data block size
512 byte/sector Unformatted Sparing

ST34555 87A25Bh (4.55 GB) 6.5 GB 118 spares per six cylinder region

Hawk 4XL Prod uct Manual, Rev. A 9

4.0 Performance characteristics

4.1 Internal drive characteristics (transparent to user)

4.2 SCSI Seek performance characteristics (visible to user) [6]*

The values given in Section 4.2.1 apply to all models of the Hawk 4XL family unless otherwise specified. Refer
to Section 9.10 and to the

SCSI Interface Product Manual

(part number 77738479) for additional timing details.

4.2.1 Access time [8]

*[ ] All notes for Section 4.2 are listed at end of Section 4.2.3.

ST34555

Drive Capacity 6.5/4.55 GByte (unformatted/formatted)
Read/Write Heads 8
Bytes/Track 124,000 Bytes (average, unformatted)
Bytes/Surface 812.5 Mbytes (unformatted)
Tracks/Surf ac e , Total 6,311 Tracks (user access ible)
Tracks/Inch 6,800 TPI
Peak Bits/Inch 139,209 BPI
Internal Data Rate 72-115 Mbits/sec (variable with zone)
Disc Rotational Speed 7,200 r/min
Average Rotational Latency 4.17 ms

Including Controller Overhead
(without disconnect) [1] [4]

Drive Level

Read Write

ms

Average – Typical [3] 9.1 10.1

Maximum [2] 10.8 11.9

Single Track – Typical [3] 1.3 1.4

Maximum [2] 1.8 1.9

Full Stroke – Typical [ 3] 17.5 19.5

Maximum [2] 19.7 20.2

10 Hawk 4XL Product Manual, Rev. A

4.2.2 Format command execution time (minutes) [1]*

4.2.3 Generalized performa nce chara cterist ics

Data buffer transfer rate to/from disc media (one 512-byte sector):

Data buffer transfer rate to/from disc media: (< 1 track):

SCSI interface data transfer rate (asynchronous) [5]:
Maximum instantaneous 6.0 Mbytes/sec [6]

Maximum average 6.0 Mbytes/sec [7]
Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI): 1.25 to 20 Mbytes/sec

(8 bit data bus models)
Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI): 2.5 to 40 Mbytes/sec

(16 bit data bus models)
Synchronous transfer rate for fast SCSI-2: 1.25 to 10 Mbytes/sec

(8 bit data bus models)
Synchronous transfer rate for fast SCSI-2: 2.5 to 20 Mbytes/sec

(16 bit data bus models).
Sector Sizes:

Default 512 byte user data blocks
Va riable 180 to 4,096 bytes per sector in even number

of bytes per sector.

If n (number of bytes per sector) is odd, then

n-1 will be us ed .

*[] Note s listed at end of Section 4.2.3.

ST34555

Maxim um (with verif y) 95
Maximum (no verify) 65

Minimum sector interleave 1 to 1

Min. [4]* 11.5 MByte/sec
Avg. [4] 15.5 MByte/sec
Max. [4] 17.5 MByte/sec

Min. [4] 7.86 MByte/sec divided by (interleave factor)
Avg. [4] 11.0 MByte/sec divided by (interleave fac tor)
Max. [4] 12.5 MByte/sec divided by (interleave fact or)

Read/write consecutive sectors on a track Yes
Flaw reallocation performance impact (for flaws reallocated at format time using

the spare sectors per sparing region reallocation scheme.)

Negligible

Overhead time for head switch (512 byte sectors) in sequential mode 1 msec
Overhead time for one track cylinder switch in sequential mode <2.4 msec (typical)
Average rotational latency 4.17 msec

Hawk 4XL Prod uct Manual, Rev. A 11

Notes for Section 4.2.

[1] Execution time is measured from receip t of the last B yte of the Com mand Descri ptor Block (CDB) to the

request for a Status Byte Tr ansf er to the Initiator (excluding connect/disconnect).

[2] Maximum times are specified over the worst case conditions of temperature, voltage margins and dr ive

orientation. When comparing spec ified access times, care should be taken to distinguish between typical
access times and maximum access times. The best comparison is obtained by system benchmark tests
conducted under identical conditions. Maximum times do not include error recovery.

[3] Typical acce ss times are meas ured under nom inal conditions of te mperature, voltage, and horizontal ori-

entation as measured on a representative sample of drives.
[4] Assumes no errors and no sector has been relocated.
[5] Rate measured from the start of the first sector transfer to or from the host.
[6] Assumes system ability to support the rates listed and no cable loss.
[7] Simulated.
[8] Access time = controller overhead + average seek time

Access to data = controller overhead + average seek time + latency time

4.3 S tart/sto p time

After DC power at nominal voltage has been applied, the drive becomes ready within 20 seconds if the Motor
Start Opt ion is disabled (i.e. the m otor star ts as soon as the power has be en applied). If a recoverable error
condition is detected during the star t sequence, the drive executes a recovery procedure which may cause the
time to become ready to exceed 20 seconds. During spin up to read y time the drive responds to some com­mands over the SCSI interface in less than 3 seconds after application of power. Stop time is less than 20 sec­onds from removal of DC power.

If the Motor Start Opt ion is enabled, the internal cont roller accepts the comm ands listed in the SC SI Interface
Product Manual less than 3 seconds after DC power has been applied. After the Motor Start Command has
been received the drive becomes ready for normal operations within 13 seconds typical ly (excluding an error
recovery procedure). The M otor Star t Command can also be used to command t he drive to stop the spindle
(see

SCSI Interface Product Manual

, part number 77738479).

There is no power control switch on the drive.

4.4 Prefetch/multi-segmented cache control

The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many
cases can enhance system performance. “Cache” as used herein refers to the drive buffer storage space when
it is used in “cache” operat ions. To sele ct prefetch and cache features the hos t sends the Mo de Select com­mand with the proper values in the a pplicable bytes in Mode Page 08h (see

SCSI Interface Product Manual

,
part number 7773 8479). Prefetch and cache operation are independent features from the standpoint that each
is enabled and disabled independently via the Mode Select command. However, in actual operation the
prefetch feature overlaps cache operation somewhat as is noted in Section 4.5.1 and 4.5.2.

All default cache and prefetch Mode parameter values (Mode Page 08h) for standard OEM versions of this
drive family are given in Table 8.

4.5 Cache operation

In general, 480 Kbytes of the 512 Kbytes of physical buffer space in the drive can be used as storage space for
cache operations. The buffer can be divided into logical segments (Mode Select Page 08h, byte 13) from which
data is read and to which data is written. The drive maintains a table of logical block disk medium addresses of
the data stored in each segment of the buffer. If cache operation is enabled (RCD bit = 0 in Mode Page 08h,
byte 2, bit 0. See

SCSI Interface Product Manual

(part number 77738479), dat a requested by the host with a
Read command is retrieved from the buffer (if it is there), before any disc access is initiated. If cache operation
is not enabled, the buffer (still seg mented with required number of segm ents) is still used, but onl y as circu lar
buffer segments during disc medium read operations (disregarding Prefetch operation for the moment). That is,
the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to
retrieve it. The retrieved data merely passes through some buffer segment on the way to the host. On a c ache

12 Hawk 4XL Product Manual, Rev. A

“miss”, all data transfers to the host are in accordance with “buffer-full” ratio rules. On a cache “hit” the drive
ignores the “buffer-full” ratio rules. See explanations associated with Mode page 02h (disconnect/reconnect
control) in the

SCSI Interface Product Manual

(part number 77738479).
The following is a simplified description of a read operation with cache operation enabled:
Case A - A Read command is received and the first logical block (LB) is already in cache:

1. Drive transfers to the initiator the first LB requested plus all subsequent contiguous LB’s that are already in

the cache. This data may be in multiple segments.

2. When the requested LB is reached that is not in any cache segment, the drive fetches it and any remaining

requested LBs from the disc and puts them in a segment of the cache. The drive transfers the remaining
requested LBs from t he cac he to the hos t in accordance with the disconnect /reconn ect specifi cation m en­tioned above.

3. If the prefetch feature is enabled, refer to Section 4.5.2 for operation from this point.
Case B - A Read command requests data, the first LB of which is not in any segment of the cache:

1. The drive fetches the requested LB’s from the disc and transfers them into a segment, a nd from there to

the host in accordance with the disconnect/reconnect specification referred to in case A.

2. If the prefetch feature is enabled, refer to Section 4.5.2 for operation from this point.
Each buffer segment is actually a self-contained circular storage (wrap-around occurs), the length of which is

an integer number of disc medium sectors. The wrap-around capability of the individual segments greatly
enhances the buffer’s ov erall performance as a cache storage, allowing a wide range of user selectable config­urations, which includes their use in the prefetch operation (if enabled), even when cache operation is disabled
(see Section 4.5.2). The number of segm ents may be selected using the Mode Select com mand, but the size
can not be directly selected. Size is sel ec ted only as a by-product of sele cting t he s egm ent num ber specifica­tion. The size in Kbytes of each segment is reported by the Mode Sense command page 08h, bytes 14 and 15.
If a size specification is sent by the host in a Mode Select command (bytes 14 and 15) no new segment size is
set up by the drive, and if the “STRICT” bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as
it does for any attempt to change unchangeable parameters (see

SCSI Interface Product Manual

, part number

77738479). The drive supports operation of any integer number of segments from 1 to 16.

4.5.1 Caching write data

Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data t o
be written to the medium is stored in one or more segments while the drive performs the write command.

Write caching is enabled along w ith read c aching. For write caching, the s am e buffer space and segment ation
is used as set up for read functions. The buffer segmentation scheme is set up or changed independently, hav­ing nothing to do with whether or not read and write caching is enabled or disabled. When a write command is
issued, the cache is first checked to see if any logical blocks that are to be written are already stored in the
cache from a previous read or write comm and. If there are, the respective cache segments a re cleared. The
new data is cached for subsequent Read commands.

If the number of write data logical blocks exceeds the size of the segment being written into when the end of
the segment is reached, the data is written into the beginning of the same cache segment, overwriting the data
that was written there at the beginning of the operation. Howev er, the drive does not overwrite data that has not
yet been written to the medium.

Table 8 shows Mode default settings for the drives.

4.5.2 Prefetch operation

If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately beyond that which
was requested by a Read command can be retrieved and stored in the buffer for immedi ate transfer from the
buffer to the host on subsequent Read comm and s that request those logical blocks (this is true even if “cache”
operation is disabled). Though the prefetch operation uses the buffer as a “cache”, finding the requested data
in the buffer is a prefe tch “hit”, not a “cache” operation “hit”. Prefetch is enabled using Mode Select page 08h,
byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch. Since data that is prefetched
replaces data already in some buffer segment(s), the host can limit the amount of prefetch data to optimize

Hawk 4XL Prod uct Manual, Rev. A 13

system performance. The max prefetch field (bytes 8 and 9) limits the am ount of prefetch. The drive does not
use the prefetch “ceiling” field (byt es 10 and 11).

During a prefetch operation, the drive crosses a cylinder bo undary to fetch more data only if the Di scontinuity
(DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.

Whenever prefetch (read look-ahead) is enabled (enabled by DRA = 0), it operates under the control of ARLA
(Adaptive Read Look-Ahead). If the host uses software interleave, A RLA enables prefetch of contiguous blocks
from the disc when it senses t hat a prefetch “hit” w ill l ikely occu r, even if two consecutive read operations were
not for phy sically contiguous bloc ks of data (e .g. “software interleav e”). ARLA disables prefetch when it decides
that a prefetch “hit ” w ill not likely o ccur. If the h ost is not using software int er leave, and if two sequenti al re ad
operations are not for contiguous blocks of data, ARLA disables prefetch, but as long as sequential read oper­ations request contiguous blocks of data, ARLA keeps prefetch enabled.

Hawk 4XL Prod uct Manual, Rev. A 15

5.0 Reliability specifications

The following reliability specifications assume correct host/drive operational interface, including all interface
timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4).

Note.

[1] Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.

5.1 Error rates

The error rates stated in this specification assume the following:

• The drive is operated per this specification using DC power as defined in this manual (see Section 6.2).

• The drive has been formatted with the SCSI FORMAT commands.

• Errors caused by media defects or host system failures are excluded from error rate computations.

5.1.1 Environmental interference

When evaluating systems operation under conditions of Electromagnetic Interference (EMI), the performance
of the drive within the system shall be considered acc eptable if the drive does not g enerate an unrecoverable
condition.

An unrecoverable error, or unrecoverable condition, is defined as one that:

• Is not detected and corrected by the drive itself;

• Is not capable of being detected from the error or fault status provided through the driv e or SCSI interface; or

• Is not capable of being recovered by normal drive or system recovery procedures without operator interven­tion.

5.1.2 Read errors

Before determination or measurement of read error rates:

• The data that is to be used for measurement of read error rates must be v erifi ed as being written correctly on
the m edia.

• All media defect induced errors must be excluded from error rate calculations.

5.1.3 Write erro rs

Write errors can occur a s a result of media defects, environmental interference, or equipment malfunc tion.
Therefore, write errors are not predictable as a function of the number of bits passed.

If a write error unrecoverable occurs because of an equipment malfunction in the drive, the error is classified as
a failure affecting MTBF. Unrecoverable write errors are those which cannot be corrected within two attempts at
writing the record with a read verify after each attempt (excluding media defects).

Seek Errors

Less than 1 in 10

7

seeks

Read Error Rates [1]

Recovered Data Less than 10 errors in 10

11

bits transferred (default settings)

Unrecovered Data Less than 1 sector in 10

14

bits transferred (default settings)

Miscorrected Data Less than 1 sector in 10

21

bits transferred
MTBF 800,000 hours
Service Life 3 years
Preventive Maintenance None required

16 Hawk 4XL Product Manual, Rev. A

5.1.4 Seek errors

A seek error is defined as a failure of the drive to position the heads to the addres sed t rack. There shal l be no
more than ten recoverable seek errors in 10

8

physical seek operations. After detecting an initial seek error, the
drive automatically reseeks to the addressed track up to 3 times. If a reseek is successful, the Extended Sense
reports a seek positioning error (15h), no seek complete error (02h), or track foll ow error (09h), and the sense
key reports a recovered error (1h). If all three reseeks fail, a seek positioning error (15h) is repor ted with a
Medium error (3h) or Hardware error (4h) reported in the Sense Key. This is an unrecoverable seek error. Unre­coverable seek errors are classified as failures for MTBF calculations. Refer to Section 5.1.1.2 of the

SCSI

Interface Product Manual

(part number 77738479) for Request Sense information.

5.2 Reliability and service

You can enhance t he relia bility of Hawk 4X L disc dr ives by ensuring that the drive receives adequa te cooling.
Section 6.4.1 provides temperature measurements and other information that may be used to enhance the ser­vice life of the drive. Section 8.3.1 provides recommended air-flow information.

5.2.1 Mean time between failure

The production disc drive shall achieve an MTBF of 800,000 hours when operated in an environment that
ensures the case temperatures spe cified in Section 6.4.1 are not exceeded. Shor t-term excursions up to the
specification limits of the operating environment will not affect MTBF performance.

The following expression defines MTBF

Estimated power-on operating hours in the period

MTBF per measurement period =

Number of drive failures in the period

Estimated power-on operation hours means power-up hours per disc drive times the total number of disc drives
in service. Each disc drive shall have accumulated at least nine months of operation. Data shall be calculated
on a rolling average base for a minimum perio d of six months.

Drive failure means any stoppage or substandard performance caused by drive malfunction.

5.2.2 Preventive maintenance

No routine scheduled preventive maintenance shall be required.

5.2.3 Service life

The drive shall have a useful service life of three years. Depot repair or replacement of major parts is permitted
during the lifetime (see Section 5.2.4).

5.2.4 Servi c e philosophy

Special equipment is required to repair the drive HDA. In order to achieve the above service life, repairs must
be performed only at a properly equipped and st affed service and repai r facility. Troubleshootin g and repair of
PCBs in the field is not rec ommended, because of the extensive diagnost ic equipment required for effective
servicing. Also, there are no spare parts available for this drive. Drive warranty is voided if the HDA is opened.

5.2.5 Service tools

No special tools are required for site installation or recommended for site maintenance. Refer to Section 5.2.4.
The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not
practical since there are no user purchasable parts in the drive.

Hawk 4XL Prod uct Manual, Rev. A 17

5.2.6 Hot plugging Hawk 4XL disc drives
Caution: Hot-plug drives are not designed for simultaneous power disconnection and physical removal.

During power-up and power-down periods, the hot SCSI connect/disconnect capability does not produce
glitches or any corruptions on an active SCSI bus. Hawk 4XL drives conform to the SCSI-3 standard require­ments for glitch-free power-on and power-off. The dr ive main tains the high - i mpeda n ce stat e a t the dev i c e con­nector contacts during a power cycle until the transceiver is enabled.

Note. The s ystems integrator mus t ensure that no tempe rature, energy, or voltage hazard is pres ented dur-

ing the hot connect/disconnect operation.

Procedure:

1. Configure the drive with no connection between the drive and the TRMPW R signal on the SCSI bus. To
accomplish this, remove all jumpers from connector J2 pins 1, 2, 3, and 4.

2. Ensure that all SCSI devices on the bus have receivers that conform to the SCSI-3 standard.

3. Eliminate all I/O processes for the drive.

4. Wait until the drive motor and discs have come to a complete stop prior to changing the plane of operation,
ensuring data integrity.

5. Insert or remove the drive after meeting the following conditions:

Caution: Do not hot-plug the first or last device on the SCSI bus (the SCSI bus termination must be external

to the drive you are inserting or removing).

a. If you are inse rt ing the dr ive, connect its power groun d and logi c ground at least 1 millisecon d before

coming into contact with the bus conne ctor. Maintain these ground connections d uring and after con­necting the device to the bus.

b. If you are removing the device, maintain its power ground and logic ground connection for at least

1 millisecond after disconnecting the device from the bus.

c. You may simultaneously switch the power to the elec tronics and mechani cs of the dr ive with the bus

contacts, if the power distribution system is able to maintain adequate power stability to other devices
during the transition and if you have met the grounding requirements given in steps 5a and 5b.

d. Ensure that the drive carrier discharges all static electricity prior to inserting the drive into the system.

Note. Do not remove or add terminator power or resistance to the SCSI bus while hot plugging a disc drive.

5.2.7 S.M.A.R.T.

This feature not implemented by this drive family.

5.2.8 Product warranty

Beginning on the da te of shipment to custo mer and continuing for a period of three years, Seagate warrants
that each product (including components and subassemblies) or spare part that fails to function properly under
normal use due to defect in m aterials on wor kman ship or due to n onconformanc e to th e applicable specifica­tions will be repaired or replaced, at Seagate’s option and at no charge to customer, if returned by customer at
customer’s expense to Seagate’s designated facility in accordance with Seagate’s Warranty Procedure.
Seagate will pay for transporting the repair or replacement item to customer. For more detailed warranty infor­mation refer to the Standard terms and conditions of Purchase for Seagate products.

Shipping

When transpor ting or shipping a drive, a Seagate approved container must be us ed. Keep your original box.
They are easily identified by the Seagate App roved Packag e label. Shipping a drive in a non-approved con­tainer voids the drive warranty .

Seagate repair centers may refuse recei pt of components improperly packaged or obvious ly dam age d in tran­sit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends shipping
by an air-ride carrier experienced in handling computer equipment.

18 Hawk 4XL Product Manual, Rev. A

Product repair and return information

Seagate customer service cent ers 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. See Section 10.0.

Hawk 4XL Prod uct Manual, Rev. A 19

6.0 Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of Hawk 4XL drives.

6.1 AC power requirements

None.

6.2 DC power requirements

The voltage and current requirements for a single drive are shown in the following table. V al ues indicated apply
at the drive power connector. The single ended power requirements includes the internal disc drive SCSI I/O
termination. The table shows current values in Amperes.

T able 2: DC power require me nts

Notes.

[1] Measured with average reading DC ammeter. Instantaneous +12 V current peaks will exceed these val-

ues.

[2] A –10% droop is per missible during initial start of spindl e, and must return to ±5% before 7,200 rpm is

reached. The ±5% must be maintained after the drive signifies that its power-up sequence has been com-

pleted and that the drive is able to accept selection by the host initiator.
[3] See +12 V current profile in Figure 3.
[4] This condition occurs when the Motor Star t Option is enabled and the drive has not yet received a Start

Motor co mmand.
[5] See Section 6.2.1 “Conducted Noise I mmunity.” Specified voltage tolerance is inclusive of ripple, noise,

and transient response.
[6] Operating condition is defined as random seek read operations with a block count of 64.

General Notes from Table 2:

1. Minimum current loading for each supply voltage is not less than 4% of the maximum operating current

shown.

2. The +5 and +12 volt supplies shall employ separate ground returns.

3. Where power is provided to multiple drives from a common supply, careful consideration for individual drive

power requirements should be noted. Where multiple units are powered on simultaneously, the peak start­ing current must be available to each device.

Notes

ST34555
N/W

Single-ended

Vol tage +5 V +12 V
Regulation [5] ±5% ±5%[2]
Maximum operating current

DC3σ [1] 0.81 0.95
Average idle current DCX

[1] 0.46 0.54

Maximum starting current

(peak DC) DC3σ
(peak AC) AC3σ

[3]
[3]

0.78 2.44

3.1
Delayed motor start (max) DC3σ [1][4] 0.48 0.20
Peak operating current

Typical DCX
Maximum DC3σ
Maximum (Peak) 3σ

[1][6]
[1]

0.75

0.81

1.5

0.76

0.95

2.5

20 Hawk 4XL Product Manual, Rev. A

6.2.1 Conducted noise immunity

Noise is specified as a per iodic and random distri bution of frequencies covering a band from DC to 10 mHz.
Maximum allowed noise values given below are peak to peak measurements and apply at the drive po wer con­nector.

6.2.2 Power sequencing

The drive does not req uire power sequencing. T he dr ive protects against ina dvertent wr iting duri ng power-up
and down. Daisy-chain operation requ ires that power be mainta ined on the ter minat ed drive to ensure p roper
termination of the peripheral I/O c ables. To automat ically delay motor star t based on the target ID (SCSI ID)
enable the Delay Motor Start option and disable the Enable Motor Star t option on the J2 conne ctor. See Sec­tion 8.1 for pin selection info r mation. To delay the motor until the drive receives a Start Unit command, enable
the Enable Motor Start option on the J2 connector.

6.2.3 12 V - Current profile

Figure 3 identifies the drive +5 V and +12 V current profile. The current during the various times is as shown:

Note. All times and currents are typical. See Table 2 for maximum current requirements.

Figure 3. Typical Hawk 4XL family drive +5 V and +12 V current profile

+5 V = 150 mV pp from 0 to 100 kHz and 100 mV pp from 100 kHz to 10 MHz.

+12 V = 150 mV pp from 0 to 100 kHz and 100 mV pp from 100 kHz to 10 MHz.

T - Power is applied to the drive.
T1 - Controller self tests are performed.
T2 - Spi ndle begi ns to accelerate under current limiting after performing drive internal

diagnostics. See Note 1 of Table 2.
T3 - T he heads move from the landing zone to the data area.
T4 - The adaptive servo calibration sequence is performed.
T5 - Ca libration is complete and the drive is ready for reading and writing.

0.0 2 4 6 8 10 12 14 16

0.0

0.5

1.0

1.5

2.0

2.5

3.0

TIME (seconds)

AC

Component

.5

1.0

+5V

Current

(amps)

+12V

Current

(amps)

5V GND

T

T

T1 T2 T4

T3

T5

Nominal
(average)
DC curve

12V GND

Hawk 4XL Prod uct Manual, Rev. A 21

6.3 Power dissipation
ST34555N/W

Typical operating random read powe r dissipation is 12.9 watts (44 BTUs per hour) of DC power average at
nominal voltages. Typical power dissipation under idle conditions is 8.8 watts (30 BTUs per hour).

6.4 Environment al limi ts

Temperature and h umi dity values experienced by the drive must b e such th at con dens ation do es not occur on
any drive part. Altitude and atmospheric pres sure specifications are referenced to a standard day at 58.7°F
(14.8°C). Maximum Wet Bulb temperature is 82°F (28°C).

6.4.1 Temperature

a. Operating

The drive meets all specifications over a 41°F to 122°F (5°C to 50°C) drive ambient temperature range with
a maximum temperature gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed
such that the temperatures at the locations specified in Table 3, column 1 are not exceeded. Air flow ma y be
needed to achieve these temperature values. Operation at case tem peratures [3] a bove these values may
adversely affec t the dr ives ab ilit y to meet specifica ti on s.

The MTBF specification for the drive is based on operating in an environment that ensures th at the case
temperatures specified in Table 3, column 2 are not exceeded. Occasional excursions to drive ambient tem­peratures of 122°F (50°C) or 41°F (5°C) may occur without impact to specified MTBF. Air flow may be
needed to achieve these temperatures. Continual or sustained operation at case temperatures above these
values may degrade MTBF.

To confirm that the required cooling for the Hawk 4XL electronics and HDA is provided, place the drive in its
final mechanical configuration, perform random write/read operations. After the temperatures stabilize,
measure the case temperature of the components listed in Table 3.

Operation of the drive at the maximum case temperature is intended for short time periods only. Continuous
operation at the elevated temperatures will reduce product reliability.

T able 3: PCB and HDA temperatures

Note.

[1] The temperatures in Column 1 are calculated and may not reflect actual operating values. Sufficient

cooling air may be required to ensure that these values are not exceeded.
[2] Measure HDA temp at point labeled “HDA” on Figure 4.
[3] PCB mounted integrated circuit case.

Items in
Figure 4

Column 1
maximum case
temperatures
operating (50°C ambient) [1]

Column 2
Maximum allowable
case temperature to
meet MTBF spec.

HDA [2] 140°F (60° C) 113°F (45°C)
U2 [3] 178°F (81°C) 142°F (61°C)
U4 [3] 183°F (84°C) 147°F (64°C)
U5 [3] 194°F (90°C) 158°F (70°C)
U13 [3] 174°F (79°C) 138°F (59°C)

22 Hawk 4XL Product Manual, Rev. A

b. Non-operating

–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This
specification assumes that the drive is packaged in the shipping container designed by Seagate for use with
drive.

Figure 4. Locations of printed cir cuit board (PCB) components listed in Table 3

Model “N” PCB

HDA

*

J1

Bottom side of PCB

*

U8

U6

U17

U6

U16

U7

U2

U1

U4

U13

U17

U13

U14

U15

U19

U5

U8

U16

U7

U2

U1

U4

U14

U15

U19

U5

Model “W” PCB

*

PCB 1

PCB 2

J1

Hawk 4XL Prod uct Manual, Rev. A 23

6.4.2 Relative humidity

The values below assume that no condensation on the drive occurs.
a. Operating

5% to 90% relative humidity with a maximum gradient of 10% per hour.

b. Non-operating

5% to 95% relative humidity.

6.4.3 Effective altitude (sea level)

a. Operating

–1,000 to +10,000 feet (–305 to +3,048 meters)

b. Non-operating

–1,000 to +40,000 feet (–305 to +12,210 meters)

6.4.4 Shock and vibration

Shock and vibration limits spe cified in this doc um ent are me as ured di rectly on t he d rive ch assis. If the drive is
installed in an enclosure to which the stated shock and/or vibration criter ia is applied, resonances may occur
internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent,
it may be necessary to modify the enclosure to minimize drive movement.

The limits of shock and vibration defined within this document are specified with the drive mounted by any of
the four methods shown in Figure 5 , and in accordanc e with the restrictions of Section 8.4. Orien tation of the
side nearest the LED may be up or down.

6.4.4.1 Shock

a. Operating—normal

The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not
exceeding 2 g at a maximum duration of 11 ms (half sinewave). Shock ma y be applied in the X, Y, or Z axis.

b. Operating—abnormal

Equipment, as installed for nor mal operation, does not incur physical damage while subjected to inte rmit­tent shock not exceeding 10 g at a maximum duration of 11 ms (half sinewave). Shock occurring at abnor­mal levels may promote degraded operational performance during the abnormal shock period. Specified
operational performance will continue when normal operating shock levels resume. Shock may be applied
in the X, Y, or Z axis. Shock is not to be repeated more than two times per second.

c. Non-operating

The limits of non-operating shock shall apply to all conditions of handling and transportation . This includes
both isolated drives and integrated drives.

The drive subjected to nonrepetitive shock not exceeding 75 g at a maximum duration of 11 ms (half sine­wave) shall not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z
axis.

The drive subjected to nonrepetitive shock not exceeding 100 g at a maximum duration of 2 msec (half sin­ewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z
axis.

d. Packaged

Disc drives shipped as loose load (not p alletized) general freight will be packaged to w ithstand drops from
heights as defined in the table below. For additional details refer to Seagate specifications 30190-001
(under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg).

Package size Packaged/product weight Drop height

<600 cu in (<9,800 cu cm) Any 60 in (1524 mm)

24 Hawk 4XL Product Manual, Rev. A

Figure 5. Recommended mounting

600-1800 cu in (9,800-19,700 cu cm) 0-20 lb (0 to 9.1 kg) 48 in (1219 mm)
>1800 cu in (>19,700 cu cm) 0-20 lb (0 to 9.1 kg) 42 in (1067 mm)
>600 cu in (>9,800 cu cm) 20-40 lb (9.1 to 18.1 kg) 36 in (914 mm)

Package size Packaged/product weight Drop height

Z

Y
X

Z

Y

X

Note. Use four screws (two per side) when

using the mounting holes located on
the sides of the drive.

See Section 8.4 when using the
mounting holes located on the
bottom of the drive.

Hawk 4XL Prod uct Manual, Rev. A 25

6.4.4.2 Vib ration

a. Operating - normal

The drive as installed for normal operation, shall comply with the complete specified performance while
subjected to continuous vibration not exceeding

5-350 Hz @ 0.5 g
Vibration may be applied in the X, Y, or Z axis.

b. Operating - abnormal

5-350 Hz @ 0.75 g (X, Y, or Z axis)

c. Non-operating

The limits of non-operating vibration shall apply to all conditions of handling and transportation. This
includes both isolated drives and integrated drives.

The drive shall not incur physical damage or degraded performance as a result of continuous vibration not
exceeding

5-22 Hz @ 0.081 inches (2.05 mm) displacement
22-350 Hz @ 2.00 g
Vibration may be applied in the X, Y, or Z axis.

6.4.5 Air cleanliness

The drive is designed to operate in a typical office environment with minimal environmental control.

6.4.6 Acoustics

Sound power during idle mode shall be 4.2 bels typical when measured to Seagate’s 30553-001 specification.

6.4.7 Electromagnetic susceptibility

See Section 2.1.2.

26 Hawk 4XL Product Manual, Rev. A

6.5 Mechanical specifications

The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions
of the front panel are shown in figure below. Refer to Figures 6 and 7 for detailed mounting configuration
dimensions. See Section 8.4, “Drive mounting.”

Figure 6. Mounting configuration dimensions for models “N”

Height: 1. 00 in 25.4 mm
Width: 4.00 in 101.6 mm
Depth: 5.74 in 145.8 mm
Weight: 1.5 pounds 0.68 kilograms

A [3]

F

D

E

L

[1]

[3]

B

G

C

[4]

Inches

A
B
C

D
E
F
G

H

J
K
L

M
N

P

R

S
T

U

V

W

145.80

101.60

25.40

60.00

15.75

101.60

6.35

44.45

95.25

60.20

25.4

101.6

4.83

0.381

3.63

6.60

0.76

9.80

57.53

52.71

5.74

4.00

1.00

2.362
.620

4.000
.250

1.750

3.750

2.370

1.00

4.000

0.19

0.015

0.143

0.260

0.030

0.386

2.265

2.075

± .010
± .010

+ .021

– .009

± .010
± .020
± .010

+ .010
– .005

± .010
± .010
± .020
± .010
± .010
± .010

max

± .25
± .25

+ .53

– .22

± .25
± .50
± .25

+ .25
– .12

± .25
± .25
± .50
± .25
± .25
± .25

max

Dimension Table

Millimeters

Mounting holes three on each side, 6-32 UNC. Max
screw length into side of drive 0.15 in. (3.81 mm). Screw tightening
torque 6.0 in-lb (.675 NM) max with minimum thread engagement of

0.12 in. (3.05 mm).
Mounting holes four on bottom, 6-32 UNC. Max screw length into

bottom of drive 0.15 in. (3.81 mm). Screw tightening torque 6.0 in-lb
(.675 NM) max with minimum thread engagement of 0.12 in. (3.05 mm).

Power and interface connectors can extend past the “A” dimension
by 0.040 in. (1.02 mm).

Decorative front panel (optional).
Centerline of pad for Pin 1 of power connector.
Centerline of pad for Pin 1 of J6. Pin ends on J6 are nominally

flush with end of drive.
Centerline of pad for Pin 1 of J2. Dimensions indicated are for

reference only.
Dimensions to Pin 1 of each connector are nominal values.

Notes:

[1]

[2]

[3]

[4]
[5]
[6]

[7]

[8]

J

[5] R

H

S [7]

[7] T

J2

J6 LED

K

W [6]

[2]

M

V

N

[4]

U [6]

P

[8]

[8]

Hawk 4XL Prod uct Manual, Rev. A 27

Figure 7. Mounting configuration dimensions for models “W”

A [3]

F

D

E

L

[1]

[3]

B

G

C

[4]

Inches

A
B
C

D
E
F
G

H

J
K
L

M
N

P

R

S
T

U

V

W

145.80

101.60

25.40

60.00

15.75

101.60

6.35

44.45

95.25

60.20

25.4

101.6

4.83

0.381

3.63

6.60

0.76

9.80

57.53

52.71

5.74

4.00

1.00

2.362
.620

4.000
.250

1.750

3.750

2.370

1.00

4.000

0.19

0.015

0.143

0.260

0.030

0.386

2.265

2.075

± .010
± .010

+ .021

– .009

± .010
± .020
± .010

+ .010
– .005

± .010
± .010
± .020
± .010
± .010
± .010

max

± .25
± .25

+ .53

– .22

± .25
± .50
± .25

+ .25
– .12

± .25
± .25
± .50
± .25
± .25
± .25

max

Dimension Table

Millimeters

J

H

S [7]

[7] T

J2

J6 LED

K

W [6]

[2]

N

P

[8]

[8]

[5] R

Mounting holes three on each side, 6-32 UNC. Max
screw length into side of drive 0.15 in. (3.81 mm). Screw tightening
torque 6.0 in-lb (.675 NM) max with minimum thread engagement of

0.12 in. (3.05 mm).
Mounting holes four on bottom, 6-32 UNC. Max screw length into

bottom of drive 0.15 in. (3.81 mm). Screw tightening torque 6.0 in-lb
(.675 NM) max with minimum thread engagement of 0.12 in. (3.05 mm).

Power and interface connectors can extend past the “A” dimension
by 0.040 in. (1.02 mm).

Decorative front panel (optional).
Centerline of pad for Pin 1 of power connector.
Centerline of pad for Pin 1 of J6. Pin ends on J6 are nominally

flush with end of drive.
Centerline of pad for Pin 1 of J2. Dimensions indicated are for

reference only.
Dimensions to Pin 1 of each connector are nominal values.

Notes:

[1]

[2]

[3]

[4]
[5]
[6]

[7]

[8]

M

V

[4]

U [6]

Hawk 4XL Prod uct Manual, Rev. A 29

7.0 Defect and error management

The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are
not dependent upon use of defect management routines by the host (initiator).

Defect and error management in the SCSI system involves the drive internal defect/error managem ent and
SCSI systems error considerations (errors in communications between Initiator and the dri ve). Tools for use in
designing a defect/error management plan are briefly o utlined in this section, with references to other sections
where further details are given.

7.1 Drive internal defects and errors

Identified defects are recorded on the drive defects list tracks (referred to as the primary o r ETF defect list).
These known defects are reallocated during the initial drive format operation at the factory. (See Section

5.2.1.2, “Format Unit command” in the

SCSI Interface Product Manual

, part number 77738479). Data correc-

tion by ECC will be applied to recover data from additional flaws if they occur.
Details of the SCSI commands support ed by the drive are described in

SCSI Interface Product Manual

.

7.2 SCSI system s errors

Information on the reporting of operational errors or faults across the interface is given in the SCSI I nterface
Product Manual. Message Protocol System is described in the

SCSI Interface Product Manual

. Severa l of the
messages are used in the SCSI systems error manage ment system. The Request Sense command retur ns
information to the host about numerous kinds of errors or faults. The Receive Diagnostic Resul ts reports t he
results of diagnostic operations performed by the drive.

Status returned by the drive to the Initiator is described in the

SCSI Interface Product Manual

. Status reporting
plays a role in the SCSI systems error management and its use in that respect is described in sections where
the various commands are discussed.

Hawk 4XL Prod uct Manual, Rev. A 31

8.0 Installation

The first thing to do wh en installing a dr ive is to set the drive ID (sele ct) on the SCSI bus and set up cer tain
operating options. This is usually done by installing small shorting jumpers on the pins of connector J2 on the
PCB (or J1-Auxiliary on the “W” models), or via the drive to host I/O signals on “WC” models. Some users con­nect cables to J6 or J1-Auxiliary and perform the set-up using remote switches.

If your sys tem is “SCAM” (SCSI Confi gured A ut o Magically ) complia nt, the syst em assign s the driv e ID ov er the
interface, so there is no need to be concerned ab out drive ID. Setting the drive ID jumpers doe sn’t hur t any­thing, but is not necessary .

If your syste m is not “SCAM” compli an t you need to set the drive ID using the ID jumpers.

Configure drive options

For option jumper locations and definitions refer to Figures 8, 9, 10 and 11. Drive default mode parameters are
not normally needed for installation. Refer to Section 9.3.2 for default mode parameters if they are needed.

• Ensure that the SCSI ID of the drive is not the same as the host adapter. Most host adapters use SCSI ID 7.

ID 7 is the highest priority on both 8 and 16 bit data buses.

• If multiple devices are on the bus set the drive SCSI ID to one that is not presently used by other devices on

the bus.

• If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. Permanently installed ter-

minators must be enabled on the drive for “N” and “W” models using jumper plug TE if termination is not pro­vided by the host equipment.

• If the drive is attached to a bus that contains ot her devices, and the new drive is not attached to the end of

the bus, the Terminator Enable jumper (TE) should be removed from the new drive.

Note. For additional information about terminat or requirement s, refer to Sections 9.8 and 9.9.

• Set all appropriate option jumpers for desired operation prior to power on. If jumpers are changed after

power has been applied, recycle the drive power to make the new settings effective.

• Installation instructions are provided by host system document ation or with any additiona lly purchased drive

installation software. If necessary see Section 10 for Seagate support ser vic es telephone numbers.

• Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as

the manufacturer labels contain information required when ser vicing the product.

Formatting

• It is not necessary to low level format this drive. The drive is shipped from the factory low level formatted in

512 byte sectors.

• Reformat the drive if a different spare sector allocation scheme is selected.

• High level format the dr ive involves assigning one or mo re partitions or logical dr ives to the drive volume.

Follow the instructions in the system manuals for the system into which the drive is to be installed.

• Systems that have Windows 95 Operating System version 950B (thi s has FAT 32) or later do not need t o

partition the drive.

8.1 Dri ve ID/optio n select heade r

Figures 8, 9, and 10 show views of the drive ID select jumper connectors. Figure 11 shows the option select
jumper connector for all models. Figure 9 shows a rear view of model drives for the purpose of showing J1-aux­iliary of the dr ive. Both J1-auxiliar y and J6 have pins for selecting drive ID and for connecting the remote LED
cable. Only one or the other should be used, although using both at the same time would not damage the drive.
The notes following the figures describe the functions of the various jumper positions on the connectors J2, J1­Auxiliary and J6. Suggested part number for the jumpers used on J2 is Molex 52747-0211(Seagate P/N

77679052). Suggested part number for the jumpers used on J1-Auxiliary and J6 are Method Electronics 861M­202-70 (Seagate part number 15481851). A bag with the two jumper plug types is shipped with standard OEM
drives.

32 Hawk 4XL Product Manual, Rev. A

Figure 8. Hawk 4XL family drive ID select header for model “N”

Notes for Figures 8 through 11 are in Section 8.1.1.

A2A1A

0

SCSI ID = 0 (default)

Jumper Plug

(enlarged to
show detail)

J6

Drive
Front

SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7

L
E
D

R
E
S

R
E
S

Reserved

Pin 1

Shipped with cover installed.

Do not install jumpers;
retain cover.

1197531

Drive Activity LED

Ground

[4]

Optional connections
to switching circuits in
host equipment to
establish drive ID. [4]

Dashed area is optional host circuitry (external to the drive)
connected to host supplied optional usage plug.

Do not connect anything to pins 13-20.

+5V

Host
Alternate
Usage Plug:

Reserved

Pins

[3]

642

[4]

Hawk 4XL Prod uct Manual, Rev. A 33

Figure 9. Hawk 4XL family drive ID select for model “W”

SCSI ID = 0 (default)

Jumper Plug

(enlarged to
show detail)

J6

Drive
Front

Pin 1

Reserved

A2A1A

0

[4]

[1]

Shipped with cover installed.

Do not install jumpers;
retain cover.

1197531

Drive Activity LED

[4]

Dashed area is optional host circuitry (external to the drive)
connected to host supplied optional usage plug.

Do not connect anything to pins 13-20.

+5V

Host
Alternate
Usage Plug:

Reserved

Pins

6842

[4]

[7]

A

L
E
D

R
E
S

3

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 = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15

Ground

Optional connections
to switching circuits in
host equipment to
establish drive ID. [4]

[3]

34 Hawk 4XL Product Manual, Rev. A

Figure 10. Hawk 4XL family drive ID select header J1-auxiliary for model “W” (J1-Auxiliary Pins 1A - 12A)

SCSI ID = 8
SCSI ID = 9

SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15

A3A2A

1

SCSI ID = 0 (default)
SCSI ID = 1

SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7

A

0

J1-DC Power

68 Pin

SCSI I/O Connector

J1

J1-Auxiliary

Pin 1A

[1] [2]

Drive HDA (rear view, PCB facing downward)

[2]

Pin 1

PCB

Pin 12A

1P2P3P4P

+5V Ground

[4]

[5]

Host Alternate
Usage Plug

Pins 1, 3, 5, and 7 are
optional connections to
switching circuits in host
equipment to establish
drive ID. [4]

Remote Switches

For ID selection use
jumpers as shown or
connect a cable for
remote switching as
shown below.

Dashed area is optional host circuitry (external to the
drive) connected to host supplied optional usage plug.

[4]

[6]

[3]

Pins 2, 4, 6, and 8 are
normally not grounded.
They are driven low (ground)
for 250 ms after a Reset
or PWR ON to allow drive to
read SCSI ID selected. [4]

A0A1A2A

3

1197531

12 10 8 6 4 2

+5V

Drive Activity LED

+5V

N.C.

Ground

220 ohm

Hawk 4XL Prod uct Manual, Rev. A 35

Figure 11. Ha wk 4XL fam ily drive option select header for models “N” and “W”

8.1.1 Notes for Figures 8, 9, 10 and 11.

[1] Notes explaining the functions of the various jum pers on jumper head er connectors J2, J1-Auxiliar y and

J6 are given here a nd in Section 8.1.2. The term “ default” means as standard OEM units are configured
with a jumper on those pos itions when shipped from factory. “Off” means no jumper i s installed; “On”
means a jumper is installed. OFF or ON underlined is factory default condition .

[2] The PCB on “N” mo del drives does not have connector J1-Auxiliar y. The J1-Auxiliary connecto r signals

conform to SFF-8009 Revision 2.0, Unitized Connector for Cabled Drives, signal assignments for auxiliary

connectors. See note [4].
[3] Reserved useage. Do not install any jumpers.
[4] Table 4 summarizes the configuration selection possibi lities available on the different Hawk 4XL model

drives.
[5] Voltage supplied by the drive.
[6] J1A Drive Activity LED—with ser ies resistor built-in pin 12, is the open collector driver that drives the

external LED minus side low to turn it on. This output is capable of driving > 20mA. This is the same signal

as on J6 pin 12, except J1A pi n 8 goes t hrough a 220 Ohm resistor. Tie the minus side of the external LED

to this pin.
[7] J6 Drive Activity LED—without series resistor built-in pin 8, is the open collector driver that drives the

external LED minus side low to turn it on. This output is capable of driving > 20mA. This is the same signal

as on J1A pin 8, except J6 pin 12 does not go through a 220 Ohm resistor. T ie the minus side of the exter-

nal LED to this pin.

Delay Motor Start

Enable Motor Start

Write Protect

Parity Disable

Term. Power from Drive

Term. Power to SCSI Bus

Term. Power from SCSI Bus

TEDSMEWPP

D

R
E
S

T
P
2

T
P
1

Jumper

Positions

Terminator Enable

(default - models
“N” and “W” only)

(Position A)

(default - models
“N” and “W” only)

Pin 1

J2

J2

*

Jumper Plug

(enlarged to
show detail)

[3]

Caution:

Do not use J2 jumper
plugs on J6 or J1­Auxiliary, as the internal
contacts will be deformed
and can not be used on
J2 without them falling off.

*Additional notes on these

functions in section 8.1.2.

J2

Drive
Front

J6

36 Hawk 4XL Product Manual, Rev. A

(“X” means the function selection can be made with jumpers on that connector;

(“Y” means the signal is available to host through that connector.)

Notes for Ta ble 4 [ ]:

[a] Use either J6 or J1-Aux, but not both.
[b] The host can drive a remotely located Drive Activity LED using signal.
[c] The drive reads the ID (asserted low) from J1-Auxiliary pins 1, 3, 5 and 7 for 250 ms after power-on or

drive reset. Jumper plugs can be used on J1-Auxiliary pins 1-2, 3-4, 5-6 and 7-8 to set drive ID if desired,
but usually a connector/cable is plugged to J1-Auxiliary to run these s ignals to the host for remote ID
selection.

Table 4: Drive configuration selections summary

Interface
type Function

Connec tor

Applicable
figureJ1 J6 J1-AUX J2

N Drive ID X, Y none 8
N Drive Activity LED Y [b] none 8
N Opt ion select none X 11
W Drive ID X, Y X, Y [c] 9, 10 [a]
W Drive Activity LED Y [b] Y [b] 9, 10 [a]
W Option select X 11

Hawk 4XL Prod uct Manual, Rev. A 37

8.1.2 Function description

*See Figure 11 for pins used for Term power.

J2
Jumper
Installation Jumper Function Description

TE (Applies to a ll mode ls )

On

With the jumper installed, the On-board (non-removable) terminator circuits are enabled
(connected to the I/O lines). Default is jumper installed.

Off Terminator circuits not enabled (not connected to I/O lines).

DS ME ( A p plies t o a ll mode ls )

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 command received from host. Delayed start feature is

overridden and does not apply when ME jumper is installed.

WP ( Applie s t o a ll mode ls )

On Entire drive is write protected.
Off

Drive is not write protected. Default is no WP jumper installed.

PD (Appli e s to all mo dels)

On Parity checking and parity error reporting by the drive is disabled.
Off

Drive checks for parity and reports result of parity checking to host.

Default is PD jumper not installed.

RES (Applies to all models)

Off

Reserved jumper position. Default is no jumper installed.

TP2 TP1 (Applies to a ll mode ls )

Off O ff No terminator power is connected to drive terminators or SCSI bus I/O cable*.
On

Off Drive supplies its own terminator power only. Jumper on this position is factory default.
Off On Drive supplies power to SCSI bus I/O cable*; none to internal terminators. When drives have

differential I/O circuits, a jumper on the TP1 pos ition may be needed to power external termi­nators (see system documentation).

On On Drive supplies terminator power to itself (internal connection) and to SCSI bus I/O cable*.

This is a legal jumper setting.

TP1 and TP2
“Position A” (Applies to all models)

On This horizontally positioned jumper across the two TP positions furthest from the PCB edge,

connects terminator power from SCSI bus I/O Term powe r cable* to the drive’s internal termi­nators (for single-ended I/O only).

Off See above explanations for TP jumpers.

38 Hawk 4XL Product Manual, Rev. A

8.2 Dri ve orientati on

The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive perfor­mance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on
its side) orientations, and these are the two preferred mounting orientations.

8.3 Cooling

Cabinet cooling must be designed by the customer so that the ambient temp erature immedi ately surrounding
the drive will not exceed temper ature conditions specified in Section 6 .4.1, “Temperature.” Specific consider­ation should be given to make sure adequate air circulation is present around the printed circuit board (PCB) to
meet the requirements of Section 6.4.1, “Tem perature.”

8.3.1 Air flow

The rack, cabinet, or drawer environment for the Hawk 4XL drive must provide heat removal from the electron­ics and head and disc as sembly (HDA). You should confirm that adequa te heat removal is provided using the
temperature measurement guidelines described in Section 6.4.1.

Forced air flow may be required to keep temperatures at or below the specified case temperatures of Table 3,
Column 2, in which case the drive should be or iented, or air flow directed, s o that the least amount of air flow
resistance is created while providing air flow to the electronics and HDA. Also, the shortest possible path
between the air inlet and exit should be chosen to minimize the travel length of air heated by the drive and
other heat sources within the rack, cabinet, or drawer environment.

If forced air is determined to be neces sary, p ossible air-flow patterns are s hown i n Figure 12. The air-flow pat­terns are created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction,
convection, or other forced air-flow patterns are acceptable as long as the temperature measurement guide­lines of Section 6.4.1 are met.

Figure 12. Air flow (suggested)

Note. Air flows in the direction shown (front to back)
or in reverse direction (back to front)

Note. Air flows in the direction shown or
in reverse direction (side to side)

Above unit

Under unit

Above unit

Under unit

Hawk 4XL Prod uct Manual, Rev. A 39

8.4 Dri ve moun ting

Refer to Figure 5 on page 24 for an illustration of the recommended mounting orientations
When mounting the dri ve using the bot tom holes (x-y plane in Figure 5) c are m ust b e taken to ensure that the

drive is not physically distorted due to a stiff non-flat mounting surface. The allowable mounting surface stiff­ness is 80 lb/in (14.0 N/mm). The fol lowing equation and paragraph define the allowable mounting surface stiffness:

where ‘k’ represents the mounting surface stiffness (units of lb/in or N/mm), and ‘x’ represents the out-of-plane
mounting surface distor tion (units of inches or millimeters). T he out-of-plane distor tion (‘x’) is determined by
defining a plane with t hree of the four mount ing points fixed and evaluating the out-of-plan e deflection of the
fourth mounting point when a known force is applied to the fourth point.

Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Tech-

nology that the drive can mee t the shock and vibration specifications given herein while mounted in
such an adapter frame. Adapter frames that are available may not have a mechanical structure capa­ble of mounting the drive so that it can meet the shock and vibration specifications listed in this manual.

8.5 Grounding

Signal ground (PCB) and HDA ground are connected together in the drive 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 i s desired for the system chassis to not be connected to the HDA/PCB ground,
the systems integrator or user must p rovide a nonconductive (electrically isolating) method of moun ting the
drive in the host equipment.

Increased radiated emissions m ay result if you do not provide the maxi mum surface area ground connection
between system ground and drive ground. This is the system designer’s and integrator’s responsibility.

K

F
x

--- 80lb/in (14.0 N/mm)==

Hawk 4XL Prod uct Manual, Rev. A 41

9.0 Interface requirements

This section describes Hawk 4XL interface requirements.

9.1 General description

This section par tially des cri bes the interface requireme nts as im plem ented on the drives. The major portion
of the interface requ irements / implementation is descr ibed in the

SCSI Interface Product Manual

(part num­ber 77738479). This secti on has tables that give the Hawk 4XL family drive's version of the SCSI implement a­tion described in the

SCSI Interface Product Manual

.

9.2 SCSI interface messages supported

Table 5 lists the messages supported by the SCSI-2 and SCSI-3 modes of the Hawk 4XL family drives.

Notes.

[1] Extended messages (see

SCSI Interface Product Manual

, part number 77738479).

[2] Not applicable to “N” models.

T able 5: SCSI messages supported by Hawk 4XL fami ly drives

Message name Message code

Supported by
SCSI-2/3

Abort 06h Y
Abort-tag 0Dh Y
Bus device reset 0Ch Y
Clear queue 0Eh Y
Command complete 00h Y
Continue I/O process 12h Y
Disconnect 04h Y
Extended messages 01h[1] Y
Identify 80h-FFh Y
Ignore wide residue (two bytes) 23h Y
Initiate re covery 0Fh N
Initiator detected error 05h Y
Linked command complete 0Ah Y
Linked command complete with flag 0Bh Y
Message parity error 09h Y
Message reject 07h Y
Modify data pointer [1] N
No operation 08h Y
Queue tag messages (two bytes)

Head of queue tag 21h Y
Ordered queue tag 22h Y

Simple queue tag 20h Y
Release recovery 10h N
Restore pointers 03h Y
Save data pointer 02h Y
Synchronous data transfer req. [1] Y
Target transfer disable 13h Y
Terminate I/O process 11h N
Wide data transfer request [1] [2] Y

42 Hawk 4XL Product Manual, Rev. A

9.3 SCSI interface commands supported

Table 6 following lists the SCSI interface commands that are supp orted in the SCSI-2, and SCSI-3 m odes of
the drive. Hawk 4XL family drives can be changed back and forth between SCSI-1 and S CSI-2/ SC SI-3 m odes
using the Change Definition comm and. OEM standard drives are shipped set to operate in SCSI-2/SCSI-3
mode.

T able 6: Commands supported by Hawk 4XL family drive

Command name

Command
code

Supported by
SCSI-2/3

Change definition 40h Y
Compare 39h N
Copy 18h N
Copy and verify 3Ah N
Format unit [1] 04h Y
Block Format N
Bytes from index Y
Physical sector form at Y
DPRY bit supported N
DCRT bit supported Y
STPF bit supported Y
IP bit supported Y
DSP bit supported Y
IMMED bit supported Y
VS (vendor specific) N
Inquiry 12h Y

Date code page (C1h) Y
Device Behavior page (C3h) Y
Firmware numbers page (C0h) Y
Implemented operating def page (81h) Y
Jumper settings page (C2h) Y
Supported Vital product data page (00h) Y

Unit serial number page (80h) Y
Lock-unlock cache 36h N
Log select 4Ch Y

DU bit N

DS bit Y

TSD bit Y

ETC bit N

TMC bit N

LP bit N
Log sense 4Dh Y

Cache statistics page (37h) Y

Non-medium error page (06h) Y

Pages supported list (00h) Y

Power-on time page (3Eh) Y

Read error counter page (03h) Y

Veri fy error counter page (05h) Y

Write error counter page (02h) Y
Mode select (same pages as Mode Sense comm and) 15h Y [2]
Mode select (10) 55h Y

Capacity Programming Y

Hawk 4XL Prod uct Manual, Rev. A 43

Mode sense 1Ah Y [2]

Caching parameters page (08h) Y
Control mode page (0Ah) Y
Disconnect/reconnect (02h) (DTDC, DIMM not used) Y
Error recovery page (01h) Y
Format page (03h) Y

Information exceptions control page (1Ch) Y

Notch and Partition Page (0Ch) N
Power condition page (1Ah) Y
Rigid disc drive geometry page (04h) Y
Unit attention page (00h) Y

Verify error recovery page (07h) Y
Xor Control page (10h) N
Mode sense (10) 5Ah Y
Prefetch 34h N
Read 08h Y
Read buffer (modes 0, 2, 3 supported) 3Ch Y
Read capacity 25h Y
Read defect data 37h Y
Read extended 28h Y
DPO bit supported Y
FUA bit supported Y
Read long 3Eh Y
Reassign blocks 07h Y
Rebuild 81h N
Receive diagnostic results 1Ch Y

Supported diagnostics pages (00h) Y

Translate page (40h) Y
Regenerate 82h N
Release 17h Y
Release (10) 57h Y
Request sense 03h Y

Actual retry count bytes Y

Deferred error supported Y

Extended sense Y

Field pointer bytes Y
Reserve 16h Y

3rd party reser ve Y

Extent reservation N
Reserve (10) 56h Y
3rd part reserve Y
Extent reservation N
Rezero unit 01h Y
Search data equal 31h N
Search data high 30h N
Search data low 32h N
Seek 0B h Y

T able 6: Commands supported by Hawk 4XL family drive (Continued)

Command name

Command
code

Supported by
SCSI-2/3

44 Hawk 4XL Product Manual, Rev. A

[1] The drive can format to any even number of bytes per sector from 180 to 4,096.
[2] Table 8 shows how individual bits are set and which are changeable by the host.
[3] WARNING: A power loss during flash programming can result in firmware corr upt ion. This u sually makes

the drive inoperable.

Seek extended 2Bh Y
Send diagnostics 1Dh Y

Supported diagnostics pages (00h) Y

Translate page (40h) Y
Set limits 33h N
Start unit/stop unit (spindle ceases rotating) (1CH) 1Bh Y
Synchronize cache 35h Y
Test unit ready 00h Y
Verify 2Fh Y
BYTCHK bit supported Y
Write 0Ah Y
Write and verify 2Eh Y
DPO bit supported Y
FUA bit supported Y
Write buffer (modes 0, 2, supported) 3Bh Y
Firmware download option (modes 5, 7 supported) [3] Y
Write extended 2A h Y
DPO bit supported Y
FUA bit support Y
Write long 3Fh Y
Write same 41h Y
XDRead 52h N
XDWrite 50h N
XDWrite extended 80h N
XPWrite 51h N

T able 6: Commands supported by Hawk 4XL family drive (Continued)

Command name

Command
code

Supported by
SCSI-2/3

Hawk 4XL Prod uct Manual, Rev. A 45

Table 7 lists the Standard Inquiry command data that the drive should return to the initiator per the format given
in the

SCSI Interface Manual

(part number 77738479), section 5.1.1.3.

Notes.

[]

1

01 means SCSI-1 implemented;
02 means SCSI-2/SCSI-3 implemented. Default is 02.

[]

2

The drive can be changed between these two configurations:
01 means response data in SCSI-1 format and has co mpa tib ility with Common Command Set data.
02 means response data in SCSI-2/SCSI-3 format (default is 02).

[]

3

For “N” models, this value is 1E.
For “W” models, this value is 3E.

R# Four ASCII d igits represent ing the last four digits of the product Firm ware Rele as e num ber. This informa-

tion is also given in the V ital Product Data pa ge C0h, t ogether with ser vo RAM and ROM rel ease num-

bers.
S# Eight ASCII digits representing the eight digits of the product serial number.
[]

4

Bytes 18 through 22 reflect the dr ive’s model number in hex values. Bytes 23 and 24 reflect the drive’s

interface type as follows:

[]

5

Copyright Year - changes with actual year.
[]

6

For “N” models, this value is 00.

For “W” models, this value is 01.

9.3.1 Inquiry Vital Product data

Instead of the standard Inquiry data shown in Table 7, the initiator can request several Vital Product Data
pages by setting the Inquiry command EVPD bit to one. The

SCSI Interface Manual

(part number 77738479),
section 5.1.1.3.1 lists the Vital Pr oduct Data p ages and describ es their formats. A separa te Inquir y comma nd
must be sent to the drive for each Vital Product Data page the initiator wants the drive to send back.

Table 7: Hawk 4XL family drive Standard Inquiry data

Bytes Data (HEX)

0-15 00 00 [02]1[02]28F 00 [00]6[1E]353 45 41 47 41 54 45 20 VENDOR ID
16-31 53 54 [33] [34] [35] [37] [32] [4E] [00]

4

20 20 20 20 20 20 20 PRODUCT ID
32-47 R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00
48-63 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
64-79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80-95 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
96-111 00 43 6F 70 79 72 69 67 68 74 20 28 63 29 20 [31] COPYRIGHT
112-127 [39] [39] [37]

5

20 53 65 61 67 61 74 65 20 41 6C 6C 20 NOTICE

128-143 72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20

Model Inquiry Data Byte 23 Byte 24

STxxxxxN

STxxxxxN

4E 00

STxxxxxW

STxxxxxW

57 0 0

46 Hawk 4XL Product Manual, Rev. A

9.3.2 Mode Sense data

The Mode Sense com mand provides a me ans for the drive to repor t its operating parameters to t he initiator.
The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and Change­able values.

Default values are hard coded in the drive firm ware that is stored i n flash EPROM no nvolatile memory o n the
drive PCB. Default values can be changed only by downloading a complete set of new firmware into the flash
EPROM. An initiator can request and receive from the dr ive a list of Default values and use those in a Mode
Select command to set up new Current and Saved values, where the values are changeable.

Saved values are stored on the disk media using a Mode Select command. Only parameter values that are
allowed to be changed can be changed by this method. See “Changeable values” defined below. P arameters in
the Saved values list that are not changeable by the Mode Select command get their values from the Default
values storage.

Current values are volatil e values currently being used by the drive to control its operation. A Mode Select com­mand can be used to c han ge t hese values (only t hose t hat are c han geable). Or i ginally, they are installed from
Saved or Default values after a power on reset, hard reset, or Bus Device Reset message.

Changeable values form a bit m ask, stored in nonvolatile memor y, that di ctates which of the Curren t values
and Saved values can be changed by a Mode Select command. A “one” allows a change to a corresponding
bit; a “zero” allows no change. For example, in Table 8 refer to Mode page 01, in the row entitled “CHG”. These
are hex numbers representing the changeable values for Mode page 01. Note that bytes 04, 05, 06, and 07 are
not changeable, because those fields are all zeros. If some changeable code had a hex value EF, that equates
to the binary pattern 1110 1111 . If there is a zero in any bit position in the field, it means that bit is not change­able. Bits 7, 6, 5, 3, 2, 1, and 0 are changeable, because those bits are all ones. Bit 4 is not changeable.

Though the drive always reports non-zero values in bytes 00 and 01, those pa rticular bytes are never change­able.

The Changeable values list can only be changed by downloading new firmware into the flash EPROM.
On standard OEM drives the Saved values are taken from the Default values list and stored into the Saved val-

ues storage location on the media prior to shipping.
When a drive is powered up, it takes Saved values from the media and stores them t o the C urrent values stor-

age in volatile memory. It is not possible to change the Current values (or the sav ed values) with a Mode Select
command before the drive is up to speed and is “ready.” An attempt to do so results in a “Check Condition” sta­tus being returned.

Note. Becaus e there may be several different versions of drive control firmware in the total population of

drives in the field, the Mode Sense values given in the following tables may not exactly match those of
some drives.

Hawk 4XL Prod uct Manual, Rev. A 47

The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com­mand pages for SCSI-2/SCSI-3 implementation. See the

SCSI In t e r fac e Product Ma nual

.

Definitions: SAV = Saved value

DEF = Default value. Standard drives are shipped configured this way.
CHG = Changeable bits; indicates if current and saved values are changeable.

[1] Though byte 12, bit 7 (A0) is shown as changeable, the FSW func tion governed by that bit is not imple-

mented by this drive.

Table 8: Mode sense data, ST34555 default values (SCSI-2/3 implementation)

Bytes 00010203040506070809101112 1314151617181920212223

Mode
Sense
Data

9F 00 10 08
00 00 00 00 00 00 02 00

Mode
Page

<------------------------------Mode Page Headers and Parameter Data Bytes---------------- ------------>

01 SAV

81 0A C8 10 68 00 00 00 0C 00 FF FF
01 DEF 81 0A C8 10 68 00 00 00 0C 00 FF FF
01 CHG 81 0A FF FF 00 00 00 00 FF 00 00 00

02 SAV 82 0E 80 80 00 0A 00 00 00 00 00 00 00 00 00 00
02 DEF 82 0E 80 80 00 0A 00 00 00 00 00 00 00 00 00 00
02 CHG 82 0E FF FF 00 00 00 00 00 00 00 00 87 00 00 00

03 SAV 83 16 00 30 00 76 00 00 00 00 00 B2 02 00 00 01 00 20 00 3C 40 00 00 00
03 DEF

83 16 00 30 00 76 00 00 00 00 00 B2 02 00 00 01 00 20 00 3C 40 00 00 00
03 CHG

83 16 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
04 SAV 84 16 00 18 9C 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1C 3C 00 00

04 DEF

84 16 00 18 9C 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1C 3C 00 00
04 CHG

84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
07 SAV 87 0A 00 11 68 00 00 00 00 00 FF FF

07 DEF 87 0A 00 11 68 00 00 00 00 00 FF FF
07 CHG 87 0A 0F FF 00 00 00 00 00 00 00 00

08 SAV 88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
08 DEF 88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
08 CHG 88 12 B5 00 FF FF FF FF FF FF 00 00 A0[1] FF 00 00 00 00 00 00

0A SAV 8A 0A 02 00 00 00 00 00 00 00 00 00
0A DEF 8A 0A 02 00 00 00 00 00 00 00 00 00
0A CHG 8A 0A 03 F3 00 00 00 00 00 00 00 00

1A SAV 9A 0A 00 02 00 00 00 01 00 00 00 04
1A DEF 9A 0A 00 02 00 00 00 01 00 00 00 04
1A CHG 9A 0A 00 03 00 00 00 00 00 00 00 00

1C SAV 9C 0A 00 04 00 00 00 00 00 00 00 01
1C DEF 9C 0A 00 04 00 00 00 00 00 00 00 01
1C CHG 9C 0A 0C 0F 00 00 00 00 00 00 00 00

00 SA V 80 02 00 00
00 DEF 80 02 00 00
00 CHG 80 02 77 00

48 Hawk 4XL Product Manual, Rev. A

9.4 SCSI bus conditions and miscellaneous features supported

Asynchronous SCSI bus conditions suppor ted by the drive are listed below. These conditions cause the SCSI
device to perform certain ac tions and can alter the SCSI bus phas e sequence. Other miscellaneous operating
features supported are also listed here. Refer to the

SCSI Interface Product Manual

(part number 77738479).

Table 9: SCSI bus conditions and other miscellaneous features

Supported by
SCSI-2/SCSI-3

Conditi ons or feature

N Adaptive Caching
Y Adaptive Read Look-ahead
Y Arbitrating System
Y Asynchronous Data Transfer
N Asynchronous Event Notification
Y Attention Condition
Y Capacity Programming
Y Contingent Allegiance Condition
Y Def erred Error Handling
Y Differential Interface Circuits available
Y Disconnect/Reconnect
Y Flag and Link bits in Control Byte supported
Y Format progress indication
Y Immedi ate status on Format unit command
Y Immediate status on Start/Stop command
Y Immedi ate status on Synchronize cache
Y Parameter Rounding
Y Queue tagging (up to 64 Que tags supported)
Y Reporting actual retry count in Extended Sense bytes 15, 16 and 17.
Y Reset Condition
Y Segmented Caching
N Synchronized (locked) Spindle Ope ration
Y Synchr onous Data Transfer
N Zero Latency Read

Supported by
SCSI-2/SCSI-3

Status supported

YBusy
Y Check Condition
N Condition Met/Good
YGood
N Intermediate/Condition Met/Good
Y Intermediate/Good
Y Queue Ful l
Y Reservation Conflict

Hawk 4XL Prod uct Manual, Rev. A 49

9.5 Synchronous data transfer

9.5.1 Synchronous data transfer periods supported

Table 10 and Sectio n 9.5.2 list Synchronous Data transfer periods suppor ted by the drive. The data transfer
period to be used by the drive and the initiator is established by an exchange of messages during the Message
Phase of operation. See the section on m essage protocol in the

SCSI Interface Product Manual

, part number

77738479.

Table 10: Synchronous data transfer periods for drive

Note.

[1] FAST-20 SCSI transfer periods.

9.5.2 REQ/ACK offset

The maximum value supported by the Hawk 4XL family drives for REQ/ACK offset is 15 (0Fh).

9.6 Physical interface

Figure 13 shows the locations of the drive physical interface components for the N drives. Shown are the loca­tions of the DC power connector, the SCSI interface connector, the I/O line terminators, and the drive select
and option select headers.

Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI
operational aspects of Seagate drive interfaces are given in the Seagate

SCSI Interface Product Manual

, part

number 77738479.
This section descri bes the connectors, cables, signals, terminators and bus t iming of the DC and SCSI I/O

interface. See Section 9.8 and Section 9.9 for additional terminator information.

9.6.1 DC cable and connector

“N” and “W” model drives receive DC power through a 4 pin connector (see Figures 13 and 14 for pin assign­ments) mounted at the rear of the main PCB. Recommended part numbers of the mating connector are listed
below, but equivalent parts may be used.

M (decimal)

Transfer period
(M times 4 nanoseconds)

12 [1] 50 [1]
15 [1] 62.5 [1]
18 [1] 75 [1]
25 100
31 125
37 150
50 200
62 250
75 300
87 350
100 400

Type of cable Connector Contacts (20-14 AWG)

14 AWG MP 1-480424-0 AM P 60619-4 (Loose Pi ece)

AMP 61117-4 (Strip)

50 Hawk 4XL Product Manual, Rev. A

Figure 13. Physical interface for “N” model drives

J1

4P 3P 2P 1P

Pin

1P
2P
3P
4P

Power

+12V
+12V ret
+ 5V ret
+ 5V

Pin 1

SCSI I/O Connector

Pin 1

DC Power
Connector

J6

J1

J2

Hawk 4XL Prod uct Manual, Rev. A 51

Figure 14. Ph ysical interface for “W” model drives

9.6.2 SCSI interface physical description

The drives may be daisy-chained together or with other compatible SCSI devices. Both ends of the cable must
be terminated. The “N” and “W ” model drives implement single-ended drivers and receivers. All signals are
common between all SCSI devices. The drive may be daisy-chained only with SCS I devices having the same
type drivers and receivers. Devices having single-ended interface circuits cannot be on the same daisy chain
with devices having differential interface circuit. A maximum of 8 (“N” models) or 16 (“W” models) SCSI devices
(including the Host) may be daisy-chained together. The SCSI devices at both ends of the daisy chain are to be
terminated. Interm edia te SCS I devices shall not be terminat ed (see Figu re 15). Remove the terminator enable
jumper TE on J2 select header, not the terminator power source selector jumper TP (Figure 11).

9.6.3 SCSI interface cable requirements

In general, cables having the characteristic impedances given in Section 9.6.3.1 are not available; however,
impedances that are somewhat lower are satisfactory. A characteristic impedance as listed in Table 11 is rec­ommended for unshielded flat cable or twisted pair ribbon cable. To minimize discontinuances and signal
reflections, cables of different impedances should not be used in the sa me bus. Implementations may require
trade-offs in shielding effectiveness, cable length, the number of loads, transfer rates, and cost to achieve sat­isfactory system operation. If shielded and unshielded cab les are mix ed wi thin the same SCSI bus, the effect of
impedance mismatch must be carefully considered. Proper impedance matching is especially important in
order to maintain adequate margin at FA S T SCS I transfer rates.

Model “N” drives use nonshielded cable connectors. A 50 conductor flat cable or 25 twisted pair cable shall be
used. A minimum conductor size of 28 AWG should be used to minimize noise effects.

Suggested nonshielded flat cable part numbers are:
Flat cable - 35M-3365-50 Tw i sted pair - Spectra Tw ist in flat 455-248-50

J1-Auxiliary

Pin 1A

68 Pin

SCSI I/O

Connector

Pin 1P

J1-DC Power

J6

J1

Pin 1

J1-DC Power

Pin

1P
2P
3P
4P

Power

+12V
+12V ret
+ 5V ret
+ 5V

J1

Pin 1

1P2P3P4P

J1-Auxiliary

Pin 1A

PCB

J2

52 Hawk 4XL Product Manual, Rev. A

Model “W” drives use nonshielded cable connectors. A 68 conductor flat cable or 34 twisted pair cable shall be
used with connectors listed in 9.6 .4. A minimum cond uctor size of 28 AWG should be used to minimize noise
effects.

Suggested nonshielded flat cable part numbers are:
Flat cable - 35M-3365-68 Tw i sted pair - Spectra Tw ist in flat 455-248-68

9.6.3.1 Sin gle-end ed I/O circuits

The maximum total cable length allowed with drives having single-ended I/O driver and receiver circuits
depends on several factors. Table 11 lists the maximum lengths allowed for different configurations of drive
usage. These values are from the ANSI SCSI -3 Fast-20 (also called Ultra SCSI) s pecification X3T10/1071D.
All device I/O lines must have equal to or less than 25 pf capacitance to ground, m easured at the beginn ing of
the stub.

Notes:

[1] The spacing of devices on the mainline SCSI bus should be at least three times the stub leng th (defined

below) to avoid clustering (Refer to Annex C of X3T10/1071D). Based on this criteria, it may be that 8
devices will not actually work on 1.5 meters of line ( .1 x 3 x 7 = 2.1 meters).

A stub length of no more than 0 .1 meter (0.33 foot) is allowed off t he mainline interconnec tion with any con­nected equipment. The stub length is measured from the transceiver to the connection to the mainline SCSI
bus.

Single-ended I/O pin assignments are shown in Tables 12 and 13.

Table 11: Cable characteristics for single-ended circuits

I/O transfer rate

Maximum number of
devices on line

Maximum cable
length allowed

Transmission line impedance
REQ/ACK Other signals

<

10 M transfers/s 8 (reg. SCSI bus) 6 meters (19.7 ft.) 90 ± 6 Ohms 90 ± 10 Ohms

<

10 M transfers/s

16 (wide SCSI bus) 6 meters (19.7 ft.) 90 ± 6 Ohms 90 ± 10 Ohms

<

20 M transfers/s 4 (reg./wide SCSI bus) 3 meters (9.8 ft.) [1] 90 ± 6 Ohms 90 ± 10 Ohms

<

20 M transfers/s 8 (reg./wide SCSI bus) 1.5 meters (4.9 ft.) [1] 90 ± 6 Ohms 90 ± 10 Ohms

Hawk 4XL Prod uct Manual, Rev. A 53

9.6.4 Mating connectors

Part numbers for the different type connectors that mate with the various Hawk 4XL I/O connectors are given in
the following sections.

9.6.4.1 Ma ting con nectors for “N” model

The nonshielded cable connector shall be a 50 c onductor connect or consisting of two rows of 25 female con­tacts with adjacent contacts 0.1 inches (2.54 mm) apart.

Recommended mating flat cable connector part numbers are:

[1] See Figure 15.
The drive device connector is a nonshielded 50 conductor connector consisting of two rows of 25 male pins

with adjacent pins 0.1 inches (2.54 mm) apart. The connector is keyed (see Figure 16).
Mating panel mount connector: 3M-CHE-2050-J01A 10 -KLE.

9.6.4.2 Ma ting con nectors for “W” model

The nonshielded cable connector shall be a 68 conductor connector consisting of two rows of 34 male contacts
with adjacent contacts 0.050 inches (1.27 mm) apart.

Recommended mating flat cable connector part numbers are:

[1] See Figure 15.
The drive device connector is a nonshielded 68 conductor conne ctor consisting of two rows of 34 female pins

with adjacent pins 0.050 inches (1.27 mm) apar t. The c onnector is keyed by means of its shape (see Figure

17).

Closed end 3M-3425-7000 W/O Strain Relief, No Center Key
(for cable 3M-3425-7050 With Strain Relief, No Center Key
ends)[1] Dupont-66900-290 With Strain Relief, With Center Key

Open end 3M-3425-6000 W/O Strain Relief, No Center Key
(In daisy chain)[1] 3M-3425-6050 With Strain Relief, No Center Key

Dupont-66900-250 With Strain Relief, With Center Key

Amp Model 786096-7 Female, 68-pin, panel mount
Amp Model 786090-7 Female, 68-pin, cable mount
Amp Model 749925-5 (0.050 inches (1.27mm, 50 mil) conductor centers, 28 or 30 AWG wire). Use

two, 34 conductor, 0.050 inches (1.27 mm, 50 mil) center flat cable with this
connector. This type connector can only be used on cable ends. [1]

Amp Model 88-5870-294-5 W/O Strain Relief, 0.025 68es (0.68 mm, 25 mil) conductor centers, 30 AWG

wire. Use either on cable ends or in cable middle section for daisy-chain

installat ions [1].
Amp Model 1-480420-0 Power connector 4 circuit housing
Berg 69307-012 12-position, 2 x 6, 2 mm receptacle housing

54 Hawk 4XL Product Manual, Rev. A

Recommended mating 80-position PCB mount connectors:

Righ t -angle to PCB connectors

Seagate P/N: 77678559 Amp US P/N: 2-557101-1 Amp Japan P/N: 5-175474-9
For additional information call Amp. FAX service at 1-800-522-675 2.

[1] Closed end type 50 pin connector used. Install terminator enable (TE) jumper.
[2] Open end type (in-line application) connector used. Remove terminator enable (TE) jumper.
[3] Host need not be on the end of the daisy chain. Another device can be on the end with the terminator, the

host having no terminator.

[4] Total interface cable length must not exceed that specified in Section 9.6.3.1 (including host adapter/initia-

tor). The cable length restriction limits the total number of devices allowed. See Table 11.

[5] SCSI ID7 has highest arbitration priority, ID0 has lowest for “N” models. For “W” models, priority is ID7 to

ID0, then ID15 to ID8 (ID 8 very lowest).
[6] Last drive on the daisy chain.
[7] Open-end type 68-pin connector used. On “W” models, install terminator enable (TE) jumper plug. “N” and

“W” drives do not require external termina tors.

Figure 15. SCSI daisy-chain interface cabling for “N” and “W” model drives

Straight-in connector Hot Plug version ( with ground gu ide-pin)

Seagate P/N: 77678703
Amp US P/N:
or

2-557103-1
94-0680-02-1

787311-1 with polarization

Amp US P/N:
or

2-557103-2
94-0680-02-2

787311-2 without polarization

Amp Japan P/N: 5-175475-9

Host Adapter

PCB

Pin 1

(check your

adapter for Pin 1 location)

[6]

[6]

[7]

SCSI ID 1

SCSI ID 0

SCSI ID 7 [5]

2 through X

SCSI devices [4]

[1]

[1]

[3]

[2]

[2]

“N” Model

Drive

“W” Model

Drive

Hawk 4XL Prod uct Manual, Rev. A 55

Figure 16. Nonshiel ded 50 pin SCSI device connector used on “N” model drives

12

3

4

.100

(2.54)

"D" ± .010

Typ.

.045

(1.14)

"C" ± .010

"B" Ref.

"A" ± .010

.834 ± .010

(21.18)

Min. Typ. 3

.051

(1.30)

.16

(4.06)

.100

(2.54)

.025
(.64)

Sq. Contact

50 Places

C

L

.040

(1.02)

Ref.

.335 ± .010

(8.50)

+.001
–.002

Dia.

.083

(2.1)
Trifurcated Pin
(4 places)

.26

(6.60)

Typ.

.065

(1.65)

x 45

° Chamfer Typ.

.20

(5.08)

Typ.

.60

(15.24)

.42

(10.67)

Ref.

No. Pos.

50

"A"

3.767

(95.68)

"B"

3.697

(93.90)

"C"

2.720

(69.09)

"D"

2.400

(60.96)

.037 Ref. Typ.
(.94)

.370

± .010

(9.398)

Pin 1Pin 49

Pin 50

Pin

2

56 Hawk 4XL Product Manual, Rev. A

Figure 17. Non-shielded 68 pin SCSI device connector used on “W” model drives

.0787
(2.00)

.519

(13.18)

.315

(8.00)

3.650

(92.71)

.840 ± .005

(21.34)

.315 ± .010

(8.00)

+.001
–.002

dia

.083
(2.1)

Trifurcated Pins
(4 places)

.085

(2.16)

x 45° chamfer
typ

.20

(5.08)

typ

.60

(15.24)

.100

(2.54)

Pos.

1

Pos.

2

12

3

4

1.816

(46.13)

Position 1

Pos. 68

Pos. 35

1.650

(41.91)

.980

(24.89)

1.368

(37.74)

.767

(19.48)

.050

(1.27)

.218

(5.54)

Pos.

1

.022

.050

.020 .047

.0787 .200

1.650 .3937 .600

.346

3.650±.005
.270

.155

Hawk 4XL Prod uct Manual, Rev. A 57

T able 12: Model “N,” single ended I/O , 50 conductor , si gnal/contact assignments

Note. The minus sign next to the signal indicates assert ed state is the low voltage of the two levels used for

logic signals.

*CAUTION: Connector contact 25 must not be connected to ground at the host end of the cable. If the I/O

cable should accidently be plugged in upside down, term ina tor power on pin 26 will be shor t ed t o
ground.

Note. See page following Table 13.

Signal
name [1]

Connector
contact
number [3]

Cable
conductor
number [5 ]

Connec tor
contact
number [5]

Signal
name [1]

GND 1 1 2 2 –DB0
GND 3 3 4 4 –DB1
GND 5 5 6 6 –DB2
GND 7 7 8 8 –DB3
GND 9 9 10 10 –DB4
GND11111212–DB5
GND13131414–DB6
GND15151616–DB7
GND17171818–DBP
GND19192020GND
GND21212222GND
GND23232424GND
NC [4] 25* 25 26 26 TERMPWR
GND27272828GND
GND29293030GND
GND31313232–ATN
GND33333434GND
GND35353636–BSY
GND37373838–ACK
GND39394040–RST
GND41414242–MSG
GND43434444–SEL
GND45454646–C/D
GND47474848–REQ
GND49495050–I/O

58 Hawk 4XL Product Manual, Rev. A

T able 13: “W” models single ended I/O cable 68 conductor signal/contact assignmen ts

Note. The minus sign next to the signal indicates assert ed state is the low voltage of the two levels used for

logic signals

Notes [ ] for Tables 12 through 13.

[1] See Section 9.7.1 or 9.6.4.2 for detailed electrical characteristics of these signals.
[2] The conductor number refers to the conductor position when using 0.025-inches (0.635 mm ) centerline

flat ribbon cable. Other cables types may be used to implement equivalent contact assignments.
[3] Connector contacts are on 0.050 inches (1.27 mm) centers.
[4] “NC” means no connection.
[5] The conductor number refers to the conductor position (right to left in Figure 15) when using 0.050 inches

(1.27 mm) centerline flat ribbon cable. Other cable types may be used to impl ement equivalent contact

assignments.

Signal
name [1]

Connector
contact
number [3]

Cable
conductor
number [2]

Connector
contact
number [3]

Signal
name [1]

GND 1 1 2 35 –DB12
GND 2 3 4 36 –DB13
GND 3 5 6 37 –DB14
GND 4 7 8 38 –DB15
GND 5 9 10 39 –DBP1
GND 6 11 12 40 –DB0
GND 7 13 14 41 –DB1
GND 8 15 16 42 –DB2
GND 9 17 18 43 –DB3
GND10192044–DB4
GND11212245–DB5
GND12232446–DB6
GND13252647–DB7
GND14272848–DBP
GND15293049GND
GND16313250GND
TermPwr17333451TermPwr
TermPwr18353652TermPwr
Reserved 19 37 38 53 Reserved
GND20394054GND
GND21414255–ATN
GND22434456GND
GND23454657–BSY
GND24474858–ACK
GND25495059–RST
GND26515260–MSG
GND27535461–SEL
GND28555662–C/D
GND29575863–REQ
GND30596064–I/O
GND31616265–DB8
GND32636466–DB9
GND33656667–DB10
GND34676868–DB11

Hawk 4XL Prod uct Manual, Rev. A 59

9.7 Electrical descr iption

“N” and “W” models use single-ended interface signals. These signals must be terminated with 110-ohm active
termination circuits at each end o f the total cable. Single-ended circuits use open col lector or three state driv­ers. All of these models can be configured to provide the SCSI termination.

9.7.1 “Single-ended drivers/recei vers

For “N” and “W” models which use single-ended drivers and receivers, typical circuits are shown in Figure 18.
Term ina tor circuits (Note [1]) are to be enabled only when the disc drive is first or last in the daisy chain.

Transmitter characteristics

Single-ended drives use an ANSI SCSI compatible open collector single-ended driver. This driver is capable of
sinking a current of 48 mA with a low level output voltage of 0.4 volt.

Receiver characteristics

Single-ended drives use an ANSI SCSI single-ended receiver with hysteresis gate or equivalent as a line
receiver.

Figure 18. Single-ended transmitters and receivers

Notes.

[1] Part of active terminator circuits. Non-removabl e LSI terminators, enabled in the drive with jumper plug TE

when it is first or last in the daisy chain. Interface signals levels and logical sense at the drive I/O connec­tor are defined as follows:

The difference in the voltages between input and output signals is due to the losses in the cable.

[2] ANSI SCSI compatible circuits.
[3] Total interface cable length should not exceed that specified in Section 9.6.3.1.
[4] Source of drive terminator power is an active circuit which has an input source voltage selected by jumper

plug TP. See Figure 11.

Logic level Driver output Receiver input

NEGATED (0) >

2.5 V: <5.25 V >2.0 V: <5.25 V

ASSERTED (1) <

0.4 V: >0.0 V <0.8 V: >0. 0 V

Transmitter

(or transceiver)

Line Driver

Flat

Cable

Pair

[3]

[2]

[4]

[1]

110

Ohm

[4]

[1]

110

Ohm

Receiver

Line Receiver

[2]

TP TP

60 Hawk 4XL Product Manual, Rev. A

9.8 Terminator requirements

Internal disc drive I/O ter mination consist s of active circuits in an LSI module that is p erman ently mounted on
the PCB. All single initiator/single target (non-dais y-chain) applications requi re that the Initiator and disc dr ive
be terminated. Daisy -chain applications require that only the units at each end o f the daisy chain be termi­nated. All other peripherals on the chain must not be terminated. (See Figure 15).

Note. Remove drive terminator enabling jumper TE where terminators are not required. Removal of termina-

tor power source selection jumper TP (see Figure 11) does not disconnect the terminator resistors
from the circuit.

It is highly recommended that ANSI SCSI -2 Standard’s Alternative 2 termination (active termination) be used
for applications with single-ended, especially if the bus will be operated at transfer rates above 5 Mbytes/sec.
The “N” and “W” m odels provide on-board active term ination that can be disabled by removal of the enable
jumper TE (see Figure 11).

Note. ACTIVE TERMINATORS ARE HIGHLY RECOMMENDED FOR USE IN THE DAISY CHAIN AS

DESCRIBED ABOVE. ACTIVE AND PASSIVE TERMINATORS SHOULD NOT BE MIXED ON THE
SAME SCSI BUS.

9.9 Terminator power
“N” and “W” model drives

You can configu re termi nator power i n four different ways. Se e Section 8.1 for illust rations tha t show how to
place jumpers enabling each of the following terminator power configurations:

1. Drive accepts terminator power through SCSI bus pins:

“N” models Pin 26
“W” models Pins 17, 18, 51, and 52

2. Drive supplies power to the SCSI bus.

3. Drive provides terminator power for optional internal terminator resistors using the drive’s power connector.

4. Drive provides power to its own terminators and to the SCSI bus terminator power line.
SCSI devices providing terminator power (TERMPWR) must have the following characteristics:
8-bit SCSI V TERM = 4.25 V to 5.25 V

800 mA minimum source drive capability

1.0 A maximum

16-bit SCSI V TERM = 4.25 V to 5.25 V

1,500 mA minimum source drive capability

3.0 A maximum

Hawk 4XL Prod uct Manual, Rev. A 61

9.10 Disc drive SCSI timing

T able 14: Disc drive SCSI timing

Description

Waveform
symbol [1]

Waveform
table [1] T yp ical timing

Target Select Time (no Arbitration) [4] T 00 N/A <2 µs
Target Select Time (with Arbitration) [4] T01 4.5-1,2 <2 µs
Target Select to Command T02 4.5-1 3.77 µs
Target Select to MSG Out T03 4.5-2 1.57 µs
Identify MSG to Command T04 4.5-3 3.36 µs
Command to Status T05 4.5-5 Command Dependent
Command to Data (para. In) T06 4.5-9 Command Dependent
Command to Data (para. Out) T07 4.5-10 Command Dependent
Command to Data (Write to Data Buffer) T08 4.5-10 Command Dependent
Command to Disconnect MSG T09 4.5-6 Command Dependent
Disconnect MSG to Bus Free T10 4.5-6,14 0.52 µs
Disconnect to Arbitration (for Reselect)

This measures disconnected CMD overhead

T11 4.5-6 Command Dependent

Target win Arbitration (for Reselect) T12 4.5-7 3.00 µs
Arbitration to Reselect T13 4.5-7 1.60 µs
Reselect to Identify MSG In T14 4.5-7 1.39 µs
Reselect Identify MSG to Status T15 4.5-8 Command Dependent
Reselect Identify MSG to Data (media) T16 4.5-11 Command Dependent
Data to Status T17 4.5-15 Command Dependent
Status to Command Complete MSG T18 4.5-5,8,15 0.98 µs
Command Complete MSG to Bus Free T19 4.5-5,8,15 0.51 µs
Data to Save Data Pointer MSG T20 4.5-14 4.00 µs
Save Data Pointer MSG to Disconnect MSG T21 4.5-14 0.79 µs
Command Byte Tr ansf er T22 4.5-4 0.04 µs
Next Command Byte Access: 4.5-4

Next CDB Byte Access (Byte 2 of 6) T23. 6.2 4.5-4 0.58 µs
Next CDB Byte Access (Byte 3 of 6) T23. 6.3 4.5-4 0.12 µs
Next CDB Byte Access (Byte 4 of 6) T 23. 6. 4 4.5-4 0.12 µs
Next CDB Byte Access (Byte 5 of 6) T23. 6.5 4.5-4 0.12 µs
Next CDB Byte Access (Byte 6 of 6) T23. 6.6 4.5-4 0.12 µs
Next CDB Byte Access (Byte 2 of 10) T23.10.2 4. 5-4 0.59 µs
Next CDB Byte Access (Byte 3 of 10) T23.10.3 4. 5-4 0.11 µs ±1 µs
Next CDB Byte Access (Byte 4 of 10) T23.10.4 4. 5-4 0.12 µs ±1 µs
Next CDB Byte Access (Byte 5 of 10) T23.10.5 4. 5-4 0.11 µs ±1 µs
Next CDB Byte Access (Byte 6 of 10) T23.10.6 4. 5-4 0.11 µs ±1 µs
Next CDB Byte Access (Byte 7 of 10) T23.10.7 4. 5-4 0.13 µs ±1 µs
Next CDB Byte Access (Byte 8 of 10) T23.10.8 4. 5-4 0.12 µs ±1 µs
Next CDB Byte Access (Byte 9 of 10) T23.10.9 4. 5-4 0.12 µs ±1 µs
Next CDB Byte Access (Byte 10 of 10) T23.10. 10 4.5-4 0.12 µs ±1 µs

62 Hawk 4XL Product Manual, Rev. A

Notes.

[1] See

SCSI Interface Product Manual

(part number 77738479), Section 4.5
[2] Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3 of this manual.
[3] Synchronous Transfer Period is determined by negotiations between an Initiator and a Dri ve. The Drive is

capable of setting periods as given in Section 9.5. See also Sections 3.1.5.2 and 3.5.3.2 of the

SCSI Inter-

face Product Manual

for a description of synchronous data transfer operation.

General timing diagrams for SCSI interface operation are shown in the

SCSI Interface Product Manual

, Section

4.5. The specific timing values that apply to this drive are listed in Table 14.

Data In Byte Transfer (parameter) T24 4.5-12 0.04 µs
Data Out Byte T ransfer (parameter) T25 4.5-13 0.04 µs
Next Data In Byte Access (parameter) T26 4.5-12 0.12 µs
Next Data Out Byte Access (parameter) T27 4.5-13 0.12 µs
Data In Byte Transfer (media) [2] T28 4.5-12 0.04 µs
Data Out Byte T ransfer (media) [2] T29 4.5-13 0.04 µs
Next Data In Byte access (media [2] T30 4.5-12 0.12 µs
Next Data Out Byte access (media [2] T31 4.5-13 0.12 µs
MSG IN Byte Transfer T32 4.5-5,7,8,14,15 0.04 µs
MSG OUT Byte Transfer T33 4.5-2 0.04 µ s
STATUS Byte Transfer T34 4.5-5,8,15 0.04 µs
Synchronous Data Transfer Characteristics:

Request Signal Tr ansf er Period [3] – – various

T able 14: Disc drive SCSI timing (Continued)

Description

Waveform
symbol [1]

Wavef orm
table [1] T yp ical timing

Hawk 4XL Prod uct Manual, Rev. A 63

10.0 Seagate technical support services

If you need assistance installing your drive, consult your dealer. Dealers are familiar with their unique system
configurations and can hel p you with s ystem conf li cts an d other technical issues. If you need additional assis­tance with your Seagate

®

drive or other Seagate products, use one of the Seagate technical support services

listed below.

SeaFONE® 1-800-SEAGATE

Seagate’s 800 number (1-800-732-4283) allows toll-free access to automated self-help services, providing
answers to commonly asked questions, troubleshooting tips, and specifications for disc drives and tape drives.
This service is available 24 hours daily and requires a touch-tone phone. International calle rs can reach this
automated self-help service by dialing 408-456-4496.

Online services

Using a modem, you can obtain troubleshooting tips, free utility programs, drive specifications and ju mpe r set­tings for Seagate’s entire product line. You can also download software for installing and analyzing your drive.

SeaNET

™

You can obtain techn ical information about Seagate produ cts over the Internet from Seagat e’s World Wide
Web home page (http://www.seagate.com) or Seagate’s ftp server (ftp://ftp.seagate.com). You can also
send E-mail with your questions to DiscSupport @ Seagate.com or TapeSupport @ Seagate.com.

Seagate CompuServe forum

Online technical suppor t for Seagate products is available on CompuSer ve. To acces s our technical support
for u m, t y p e

go seagate

. This forum provides information similar to that found on SeaBOARD. In addition, you

can type questions or browse through previous questions and answers on the fo rum messages.

SeaBOARD

®

SeaBOARD is a com puter bulletin board system that contain s informa tion about Seagate disc a nd tape dr ive
products and is available 24 hours daily. Set your communication s software to eight data bits, no parity, a nd
one stop bit (8-N-1).

FAX services

SeaF A X

®

You can use a touch-tone telephone to access Sea gate’s automated FAX system to receive technical suppor t
information by return FAX . This serv ice is available 24 hours daily.

Seagate technical support F AX

You can FAX questions or comments to technical supp ort specialists 24 ho urs daily. Responses are sent dur­ing business hours.

Location Phone number

Australia 61-2-9756-2359
France 33 1-48 25 35 95
Germany 49-89-140-9331
Taiwan 886-2-2719-6075
Thailand 662-531-8111
UK 44 -1 628-4780 11
USA Disc: 405-936-1600; Tape: 405-936-1630

Location Phone number

Australia 61-2-9756-5170
Germany 49-89-1430-5102
UK 44-1628-894084
USA Disc: 405-936-1620; Tape: 405-936-1640

Location Phone number

Australia 61-2-9725-4052
France 33 1-46 04 42 50
Germany 49-89-1430-5100

64 Hawk 4XL Product Manual, Rev. A

Direct-support services

Seagate technical support

For one-on-one help, you can talk to a technical s upport specialist during local business hours. Before calling,
note your syste m conf igu ration and drive model n umbe r (ST

xxxx

).

SeaTDD™ 405-936-1687

Using a telecommunications device for the deaf (TD D), you can send q uestions or comment s 24 hours daily
and exchange messages with a technical suppor t specialist between 8:00

A.M

. to 12:15 P.M. and 1:30 P.M. to

6:00

P.M

. (Central time) Monday through Friday.

Customer service centers

Seagate direct OEM, Distribution, and Systems Integrator customers should contact their Seagate service rep­resentative for warranty information. Other customers should contact their place of purchase. Seagate offers
comprehensive customer support for all Seagate drives. These services are available worldwide.

Hong Kong 852-2368 7173
Japan 81-3-5462-2979
Korea 82-2-556-4251/7395
Singapore 65-488-7528
Taiwan 886-2-2715-2923
UK 44 -1 628-8906 60
USA Disc: 405-936-1685; Tape: 405-936-1683

Location Phone number

Australia 61-2-9725-3366 (9:00

A.M

. to 5:00 P.M., East ern time, M–F)

France 33 1-41 86 10 86 (9:30

A.M

. to 12:30 P.M., 2:00 P.M. to 5:00 P.M., M–F)

Germany Disc: 49-89-140-9332; Tape: 49-89-140-9333

(9:30

A.M

. to 12:30 P.M., 2:00 P.M. to 4:00 P.M., M–F)
Hong Kong 852-2368 9918
Korea 82-2-531-5800 (9:00

A.M

. to 12:00 P.M., 1:00 P.M. to 6:00 P.M., M–F)

Singapore 65-488-7584 (9:00

A.M

. to 12:00 P.M., 2:00 P.M. to 5:00 P.M., M–F)
Taiwan 886-2-2514-2237
UK 44-1628-894083 (10:00

A.M

. to 1:00 P.M., 2:00 P.M. to 5:00 P.M., M–F)

USA Please dial 1-800-SEAGATE or 408-456-4496 for the specific product telephone number.

(8:00

A.M

. to 1:15 P.M., 2:30 P.M. to 7:00 P.M., Central time, M–F)

Location Phone number FAX number

Asia Pacific and Australia 65-485-3595 65-488-7503
Europe, Middle East, and Africa 31-2031-67300 31-2065-34320
Japan 81-3-5462-2904 81-3-5462-2979
USA 1-800-468-3472 405-949-6740

Other Americas (Brazil, Canada, Mexico) 405-949-6706 405-949-6738

Manufacturer’s representatives

Brazil

MA Informatica 55-21-516-6649 55-21-516-5280

Canada

Memofix
Adtech

905-660-4936
905-812-8099
1-800-624-9857

905-660-8738
905-812-7807

Mexico

Abicom Seamax SA DE CV 525-546-4888 525-546-4888

Southern Europe

Caesar Italia 39-688-18149 39-688-02103

Location Phone number

Hawk 4XL Prod uct Manual, Rev. A 65

Index

Symbols

+5 and +12 volt supplies 19

Numerics

50 conductor connector 53
50 conductor flat cable

51

50 pin connector

54, 55

68 conductor connector

53

68 conductor flat cable

52

A

AC power 19
access time

9, 11

accessories

8

acoustics

25

active circuit

60

actuator

7, 38

actuator assembly

6

adaptive servo calibration

20

address

11

addressed track

16

air circulation

38

air cleanliness

25

air flow

21, 38

suggested

38

air inlet

38

altitude

23

altitude and atmospheric pressure

21

ambient

22

ambient temperature

21, 38

arbitration priority

54

asynchronous interface transfer rate

62

audible noise

3, 7

Australia/New Zealand Standard

4

automatic retry

15

automatic shipping lock

5

average idle current

19

average latency

7

average rotational latency

9, 10

B

background processing 7
backward compatibility

5

bits/inch

9

buffer

11, 12

buffer segment

11, 12

buffer segmentation

12

buffer-full

12

buffer-full ratio

12

bus device reset message

46

bytes per sector

44

bytes/surface

9

bytes/track

9

C

cabinet cooling 38
cable

49

shielded

51

unshielded

51

cable characteristics

single-ended circuits

52

cable length

51, 59

cache

11, 12

cache buffer

7

cache miss

11

cache mode

11

cache operation

11

cache operation hit

12

cache segment

12

caching write data

12

calibration

20

Canadian Department of Communications

3

capacities

8

capacity, drive, programmable

8

case temperature

21

CE Marking

3

change definition command

42

changeable bit

47

changeable value

46

characteristic impedance

51

check condition

46

class B limit

3

command

11, 42

command descriptor block (CDB)

11

command queuing

7

condensation

21, 23

conducted noise immunity

19, 20

conductor size

51, 52

connect/disconnect

11

connector

49

connector contact

58

connector key

53

consecutive read operation

13

contiguous blocks of data

13

continuous vibration

25

controller

11

controlle r self test

20

cooling

38

cooling air

21

cost

51

C-Tick Marking

3

current

20, 59

current lim it ing

20

current profile

20

current requirements

19

current value

46, 47

cylinder boundary

13

D

daisy-chain 20, 51, 53, 54, 59, 60

66 Hawk 4XL Product Manual, Rev. A

termina ting 51

data area

20

data correction

15

by ECC

29

data transfer period

49

data transfer protocol

7

data transfer rate

10

DC cable and connector

49

DC power

11, 15, 21, 37, 49

DC power connector

49, 50

DC power requirements

19

dedicated landing zone

5

default

35, 37

default mode parameter

31

default value

46, 47

defect/error management

29

delayed motor start option

19

delayed start

37

depot repair

16

depot repair philosophy

16

diagnostics

20

differential I/O circuit

37

differential interface circuit

51

differentiating features

5

dimensions

26

disable read ahead

12

disc access

11

disc drive

termination

60

disc media

10

disc rotational speed

9

disconnect/reconnect

12

control

12

specification

12

discontinuance

51

discontinuity (DISC) bit

13

DRA bit

12

drive

25

drive activity LED

36

drive capacity

9

programmable

8

drive configuration

36

drive default mode parameter

31

drive defects list track

29

drive failure

16

drive firmware

46

drive I/O connector

59

drive ID

31, 36

drive ID select

32, 33, 34

drive ID select jumper connector

31

drive ID/option select header

31

drive internal

20

drive internal defects and errors

29

drive malfunction

16

drive mounting

26, 39

constraints

15

drive option select header

35

drive orientation

11, 38

drive power

31

drive reset

36

drive SCSI timing

61

drive select header

49

drive spindle

37

drive transfer

12

drive volume

31

drive warranty

16

driver and receiver

51

dynamic spindle brake

7

E

ECC 15
electrical characteristics

49, 58

electromagnetic compatibility

3

electromagnetic interference (EMI)

15

electromagnetic susceptibility

25

embedded servo

7

EMC com plia nce

3

EMI requirements

3

environment

38

environmental control

25

environmental interference

15

environmental limits

21

environmental requirements

15

EPROM

46

equipment malfunction

15

error

15

error correcting code

7

error management system

29

error rate

15

error rate calculation

15

ETF defect list

29

European Union requirements

3

EVPD bit

45

execution time

11

extended messages

41

extended sense

16

F

fast SCSI tra n sfer rate 51
Fast-20 SCSI

5, 7

fault status

15

FCC rules and regulations

3

field repair

16

firmware

46

flat ribbon cable

58

flaw reallocation

10

format

44

format command

10

format operation

29

format time

10

format unit command

29

formatted

8

formatting

31

front panel

26

FSW function

47

Hawk 4XL Prod uct Manual, Rev. A 67

G

gradient 22, 23
ground

57

ground return

19

grounding

39

H

hard reset 46
hardware error

16

HDA

5, 16, 21, 38, 39

temperature

21

head and disc assembly.

See

HDA

heads

20

heat removal

38

heat source

38

high level format

31

host

12, 13, 29, 36, 37, 44, 54, 57

host adapter

31

adapter/initiator

54

host equipment

39

host I/O signal

31

host system

31

host system malfunction

15

host/drive operational interface

15

hot connect/disconnect

17

hot plug

17

humidity

21, 23

I

I/O cable 57
I/O circuits

single-ended

52

I/O line

37

I/O te rmination

60

identified defect

29

idle condition

21

impedance match/mismatch

51

initiator

termination

60

inquiry command

45

inquiry vital product data

45

installation

31

installation guide

4, 8

installat ion ins t r uc ti o ns

31

instantaneous current peak

19

integrated SCSI controller

7

interface cable length

54

interface data

10

interface requirements

41

interface signals

single-ended

59

interface timing

15

interleave

7

interleave factor

10

internal data rate

9

J

J1-auxiliary 31
jumper

8, 31, 35, 36, 37

jumper function description

37

jumper header

35

jumper plug

31

jumper plug TE

59

jumper plug TP

59

jumper plug type

31

L

landing zone 7, 20
LB

12

logical

11

logical block

11, 12

logical characteristics

49

logical segment (mode select page 08h)

11

low level fo rma t

31

LSI module

60

M

magnetoresistive heads 5
mating connector

49, 53

mating flat cable connector

53

maximum case temperature

21

maximum current requirements

20

maximum operating current

19

maximum starting current

19

ME jumper

37

mean time between failure.

See

MTBF

media

7, 46

media defect

15

media defect induced error

15

medium error

16

message protocol

49

message protocol system

29

messages

SCSI interface

41

miscellaneous features

48

mode page 01

46

mode page 08h

11

mode parameter

46

page 08h

13

mode select command

11, 12, 46

mode select page 08h

12

mode sense command

46, 47

mode sense command page 08h

12

mode sense data

46, 47

mode sense value

46

model number table

5

motor start command

11

motor start option

11, 19

mounting configuration

26

mounting configuration dimensions

26, 27

mounting constraints

15, 39

mounting point

39

68 Hawk 4XL Product Manual, Rev. A

mounting surface 39
mounting surface distortion

39

mounting surface stiffness

39

MR heads

5

MTBF

15, 16, 21

multiple segment

12

multi-segmented cache control

11

N

noise 20

audible

3, 7

nominal voltage

21

non-operating

23, 25

temperature

22

non-operating vibration

25

nonshielded 50 conductor connector

53

nonshielded 68 conductor connector

53

nonshielded cable connector

51, 52

nonshielded flat cable

52

number of loads

51

O

office environment 25
operating

23, 25

operating environment

16

operating option

31

operating parameter

46

operator intervention

15

option jumper

31

option jumper location

31

option select header

49

option select jumper

31

options

8

orientation

11, 23, 38

out-of-plane deflection

39

out-of-plane distortion

39

output voltage

59

overhead time

10

P

package size 23
package test specification

4

packaged

23

parity

37

parity checking

37

parity error

37

partition or logical drive

31

PCB

16, 31, 35, 37, 38, 39, 46, 49, 54

temperature

21

PD jumper

37

peak bits/inch

9

peak starting current

19

performance characteristics

9

performance degradation

23

peripheral I/O cable

20

physical buffer space

11

physical characteristics

49

physical damage

25

physical interface

49, 50

physically contiguous blocks of data

13

power

19, 20, 37

power connector

19, 20

power control switch

11

power dissipation

21

power distribution

3

power requirements

19

power sequencing

20

power supply voltage

15

power-on

31, 36

power-on operating hours

16

power-on reset

46

power-up

20, 37

power-up hours

16

prefetch

11, 12, 13

prefetch (read look-ahead)

11, 13

prefetch ceiling field

13

prefetch data

12

prefetch field

13

prefetch hit

12, 13

prefetch mode

11

prefetch of contiguous blocks

13

prefetch operation

11, 12

prefetch segmented cache control

11

preventive maintenance

15, 16

printed circuit board.

See

PCB

PRML read channel electronics

5

product data page

45

programmable drive capacity

8

R

radio interference regulations 3
read

11

read caching

12

read command

11, 12

read data

11

read error

15

read error rate

15, 29

read operation

11

read power dissipation

21

read/write head

9

ready

46

receive diagnostic results

29

recommended mounting

24

recoverable seek error

16

recovered error

16

reference documents

4

regulation

19

relative h umidity

23

reliabilit y

7

reliability and service

16

reliability specifications

15

remote ID selection

36

remote switch

31

Hawk 4XL Prod uct Manual, Rev. A 69

repair facility 16
repair information

18

REQ/ACK offset

49

request sense command

29

request sense information

16

reseek

16

resonance

23

retrieved data

11

S

S.M.A.R.T. 17
safety

3

saved value

46, 47

SCAM

7, 31

SCSI

commands

42

format commands

15

interface data transfer rate

10

messages

41

SCSI bus

31, 51

SCSI bus cable

31

SCSI bus condition

48

SCSI bus I/O cable

37

SCSI bus phase sequence

48

SCSI command

29

SCSI device

51

SCSI I/O connector

50

SCSI I/ O te r minatio n

19

SCSI ID

31, 37

SCSI interface

11, 15, 51

SCSI interface cable

51

SCSI interface commands supported

42

SCSI interface connector

49

SCSI interface data

10

SCSI Interface Product Manual

3, 4, 5

SCSI systems error

29

SCSI systems error consideration

29

SCSI systems error management

29

SCSI-1 mode

42

SCSI-2/SCSI-3

47

SCSI-2/SCSI-3 mode

42

SCSI-3 (Fast-20) interface

5

Seagate support service

31

sector

12

sector interleave

10

sector size

8

sector sizes

10

sector transfer

11

seek error

15, 16

seek positioning error

16

segment

11, 12

segment number

12

self-contained

12

sense key

16

sequential read operations

13

service

life

15, 16

philosophy

16

tools

16

servo data

5

shielded cable

51

shielding

3

shielding effectiveness

51

shipping

17

shipping container

22

shock

23

and vibration

23

shock mount

39

signal ground

39

signal reflection

51

single ended I/O

signal/contact assignment

50 conductor

57

68 conductor

58

single unit shipping pack

8

single-ended drive

59

single-ended I/O

37

single-ended I/O circuits

52

single-ended interface circuit

51

single-ended interface signals

59

single-ended SCSI driver

7, 51, 59

single-ended SCSI receiver

7, 51, 59

site installation

16

software interleave

13

source voltage

59

spare part

16

spindle

20

spindle startup

37

standard day

21

standards

3

start motor command

19

start unit command

37

start/stop time

11

status

29

STIR algorithm

7

stop spindle

11

stop time

11

storage capacity

29

straight-in connector

54

strict bit in Mode page 00h

12

supply voltage

19

support services

63

synchronous data transfer

49

synchronous data transfer operation

62

synchronous data transfer period

49

synchronous transfer period

62

synchronous transfer rate

10

system chassis

39

system operation

51

system recovery procedures

15

T

technical support services 63
temperature

11, 21, 38

70 Hawk 4XL Product Manual, Rev. A

ambient 21
case

21

gradient

21

maximum case

21

non-operating

22

PCB and HDA

21

regulation

3

See also

cooling

terminated

20

termina tion

20

active

60

disc drive

60

initiator

60

terminator

31, 37, 54, 59

active

60

passive

60

terminator circuit

37, 59

terminator enable jumper TE

31, 51, 54, 60

terminator power

37, 57, 59, 60

source selectio n jumper TP

51, 60

terminator requirements

31, 60

termpower

37

TP jumper

37

TP1 position

37

tracks/inch

9

tracks/surfa ce , to tal

9

transfer period

49

transfer rate

10, 51

troubleshooting

63

twisted pair ribbon cable

51

typical access time

11

U

Ultra SCSI 5, 7
unformatted

8

unrecoverable condition

15

unrecoverable error

15

unrecoverable seek error

16

Unrecoverable write error

15

unshielded cable

51

unshielded flat cable

51

V

vibration 23, 25
vital product data

45

volatile m e mory

46

voltage

11, 19

voltage margin

11

W

warranty 7, 17
wet bulb temperature

21

WP jumper

37

wrap-around

12

write caching

12

write command

12

write data logical block

12

write error

15

unrecoverable

15

write operation

12

write protect

37

Z

zoned bit recording (ZBR) 7

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

Publication Number: 77767508, Rev. A, Printed in USA