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ST34520LW
User Manual
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Table of contents
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Seagate ST34520LW, ST36530WC, ST34520LC User Manual

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Medalist Pro

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ST39140N/W/WC/LW/LC
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ST36530N/W/WC
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ST34520N/W/WC/LW/LC
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Product Manual, Volume 1
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Medalist Pro

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ST39140N/W/WC/LW/LC
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ST36530N/W/WC
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ST34520N/W/WC/LW/LC
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Product Manual, Volume 1
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© 1997-1999 Seagate Technology, Inc. All rights reserved
Publication number: 32661-001, Rev. D
February 1999
Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publica-
tion may be reproduced in any form without written perm ission of Seagat e Technology, Inc.

Revision status summary sheet

Revision Date Writer/Engineer Sheets Affected
A 04/17/98 D. Ashby/B. Betancourt 1/1, v thru viii, 1 thru 86. B 05/27/98 D. Ashby/B. Betancourt 13, 14, and 27. C 07/02/98 D. Ashby/B. Betancourt 10, 22, 73, and 74. D 02/08/99 D. Ashby/B. Betancourt 1, 5-7, 10, 11, 13, 15, 16, 19, 22, 23, 28,
29, 31-33, 36, 38-40, 44, 47, 50-55, 57-61, 63, 64, 67, 69, and 70-74.
Notice. This manual is volume 1 of a two-volume document with the SCSI interface information in the Volume 2
SCSI Interface Product Manual
If you need the SCSI in terface information, order the volume 2 number 77738479.
, part number 77738479.
SCSI Interface Product Manual
, part
Medalis t Pr o P roduct Manual, Rev. D 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.1 Environmental interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.2 Read errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.3 Write errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.4 Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2 Reliability and service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4
5.2.1 Mean time bet ween failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.2 Preve ntive maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.3 Service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.4 Service philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.5 Service tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2.6 Hot plugging Medalist Pro disc drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.7 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.8 Product warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.3 Power dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2
6.4 Environmental limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.4.1 Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
vi Medalist Pro Product Manual, Rev. D
6.4.3 Effective altitude (sea level). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.4.6 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.4.7 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.5 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
7.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
7.1 Drive internal defects and errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
7.2 SCSI systems errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
8.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3
8.1 Drive ID/option select header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
8.1.1 Notes for Figures 9, 10, 11, 12, 13, and 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
8.1.2 Function description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
8.2 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.3 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
8.3.1 Air flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1
8.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
8.5 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2
9.0 Interface requiremen ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
9.1 General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
9.2 SCSI interface messages supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
9.3 SCSI interface commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
9.3.1 Inquiry Vital Product data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
9.3.2 Mode Sense data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
9.4 SCSI bus conditions and miscellaneous features supported . . . . . . . . . . . . . . . . . . . . . . . . .53
9.5 Synchronous data trans fer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
9.5.1 Synchro nous data transfer periods supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
9.5.2 REQ/ACK offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
9.6 Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
9.6.1 DC cable and connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
9.6.2 SCSI interface physical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
9.6.3 SCSI interface cable requireme n ts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
9.6.4 Mating connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
9.7 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
9.7.1 Single-ended drivers /receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
9.7.2 Multimode—SE or LVD alternative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
9.8 Terminator requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
9.9 Terminator power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
10.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Appendix A. Sense keys and additional sense codes supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Medalis t Pr o P roduct Manual, Rev. D vii

List of Figures

Figure 1. Medalist Pro family drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Medalist Pro family drive (50-pin I/O connector version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3a. Typical Medalist Pro family drive +12 V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 3b. Typical Medalist Pro family drive +5 V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 4. Locations of printed circuit board (PCB) components listed in Table 3 . . . . . . . . . . . . . . . . . 23
Figure 5. Recommended mo unting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 6. Mounting configuration dimensions for “N” models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 7. Mounting configuration dimensions for “W” and “LW” mode ls . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 8. Mounting configuration dimensions for “WC” and “LC” models . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 9. Medalist Pro family drive ID select header for “N” models. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 10. Medalist Pro family drive ID select for “W,” “WC,” “LW,” and “LC” models . . . . . . . . . . . . . . 35
Figure 11. Medalis t Pro fa mil y drive ID sele ct header J 1-aux iliary for “W” and “LW” models
(J1-Auxiliary Pins 1A - 12A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 12. Medalist Pro family drive option select header for “N” and “W” models. . . . . . . . . . . . . . . . . 37
Figure 13. Medalist Pro family drive option select header for “WC” models . . . . . . . . . . . . . . . . . . . . . . 37
Figure 14. Medalist Pro family drive option select header for models “LW” and “LC”. . . . . . . . . . . . . . . 38
Figure 15. Air flow (suggested) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 16. Physical interface for “N” model drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 17. Physical interface for “W” and “LW” model drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 18. Physical interface for “WC” and “LC” model drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 19. SCSI daisy-chain interface cabling for “N” and “W” model drives . . . . . . . . . . . . . . . . . . . . . 61
Figure 20. Nonshielded 50 pin SCSI device connector used on “N” model drives . . . . . . . . . . . . . . . . . 62
Figure 21. Non-shielded 68 pin SCSI device connector used on “W” and “LW” model drives . . . . . . . . 63
Figure 22. Non-shielded 80 pin SCSI “SCA-2” connector, used on “WC” and “LC” model drives. . . . . . 64
Figure 23. Single-ended transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Figure 24. LVD output signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Figure 25. Typical SE-LVD alternative transmitter receiver circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Medalis t Pr o P roduct Manual, Rev. D 1

1.0 Scope

This manual describes the Seagate Technology®, Inc. Medalist Pro™ disc drives. Medalist Pro drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-
2, and SCSI -3 (Fast-20 and Fast-40) interface specifications t o th e extent described in t his manual. The
Interface Product Manual
other families of Seagate drives. From this point on in this product manual the reference to Medal ist Pro models is referred to as “the drive”
(unless references to individual models are necessary).
(part number 77738479) describes general SCSI interface characteristics of this and
SCSI
*
*Model “N” version with 50-pin SCSI I/O connector

Figure 1. Medalist Pro fa mily drive

Medalis t Pr o P roduct Manual, Rev. D 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

Medalist Pro family drives comply with Seagate standa rds as noted in the appropriate s ections of this manual and the Seagate
Medalist Pro disc drives are UL recognized components per UL1950, CSA certified to CSA C22.2 No. 950­M89, and VDE certified to VDE 0805 and EN 60950 .

2.1.1 Electromagnetic compatibility

The drive, as delivered, is designed f or s ystem integr ation 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.
SCSI Interface Product Manual
, part number 77738479 (Vol. 2).

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 performance of the drive. See Section 5.1.1 and Table 2a, 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 and Directive 93/68/EEC of 22 July 1993.
4 Medalist Pro Product Manual, Rev. D
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

Medalist Pro Installation Guide, Seagate P/N 32663-001 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.
Medalis t Pr o P roduct Manual, Rev. D 5

3.0 General description

Medalist Pro drives combine magnetoresistive (MR) heads, partial respon se/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a SCSI-3 (F ast-20 and Fast-40) interf ace t o provide high performance, high capacity data storage for a variety of systems including high-end desktop systems, worksta­tions, and entry level servers.
Fast-20 and F ast-40 (also known as Ultra SCSI and Ultra-2 SCSI) are negotiated transfer rates. These transfer rates will occur only if your host adapter also supports Fast-20 and Fast-40 data transfer rates. This drive also operates at SCSI-2/SCS I-3 data transfer rates for backward compatibility with non-Fast-20/Fast-40 capable SCSI host adapters.
Table 1 lists the features that differentiate the various Medalist Pro SCSI-3 Fast-20 and Fast-40 models.
Table 1: Drive model number vs. I/O features
Number
Model number
ST39140N 8 single-ended 50 8 ST39140W 8 single-ended 68 16 ST39140LW 8 multimode (SE/L VD) [1] 68 16 ST39140WC 8 single-ended 80 16 ST39140LC 8 multimode (SE/L VD) [1] 80 16 ST36530N 8 single-ended 50 8 ST36530W 8 single ended 68 16 ST36530WC 8 single-ended 80 16 ST34520N 8 single-ended 50 8 ST34520W 8 single-ended 68 16 ST34520LW 8 multimode (SE/L VD) [1] 68 16 ST34520WC 8 single-ended 80 16 ST34520LC 8 multimode (SE/L VD) [1] 80 16
of head s I/O circuit t y pe
Number of I/O connector pins
Number of I/O data b us bits
Note.
[1] See Section 9.7.2, “Multimode—SE or LVD alternative.” The drive records and recovers data on 3.5-inch (86 mm) non-removeable discs.
The drive supports the Small Computer System Interface (SCSI) as described in the ANSI SCSI-2 and SCSI-3 interface specifications to the extent described in this manual (volume 1), which defines the product perfor­mance characteristics of the M edalist P ro family of drives, and the part number 77738479, which describes the general interface characteristics of this and other families of Seagate SCSI drives.
The drive’s interface supports multipl e initiators, disconnect/reconnect, and aut omatic 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.
SCSI Interface Product Manual
(volume 2),
6 Medalist Pro Product Manual, Rev. D
Medalist Pro drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibil­ity of destroying or degrading data by landing in the data zone. The drive 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 automati cally diseng ages when power is appli ed t o the drive and the head load process begins.
Medalist Pro drives deco de track 0 location dat a from t he ser vo data embedd ed on each surface to elim inate mechanical transducer adjustments and related relia bilit y con cer ns.
A high-performance actuator assembly with a low-inertia, balanced, pa tented, straight-arm design provides excellent performance with minimal power dissipation.

Figure 2. Medalist Pro fa mily drive (50-pin I/O connector version)

Medalis t Pr o P roduct Manual, Rev. D 7

3.1 Standard features

The Medalist Pro family has the following standard features:
• Integrated SCSI controller
• Single-ended and multimode single-ended/low voltage differential 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
• Sector size 512 bytes/sector
• Programmable drive capacity
• Flawed sector reallocation at format time
• Programmable auto write and read reallocation
• Reallocation of defects on command (Post format)
• 256-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 (“N” and “W” models only)
• 512 K byte data buffer
• Hot plug compatibility (Section 9.6.4.3 lists the proper host connector needed) for “WC” and “LC” drives
• SCAM (SCSI Configured Automatically) plug -n -play level 2 compliant, factory set to level 1 (not user s ele ct-
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 diam eter of approximately 3.5 inches (86 m m ). The aluminum substrate 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”) and Ultra-2 SCSI (“Fast-40”)
• Programmable 1 or 3 segment 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 industr y -standa rd Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.)
• 3-year warranty
8 Medalist Pro Product Manual, Rev. D

3.5 Unformatted a n d formatted capacities

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.
Formatted data block size
Model
ST39140 9.100 GB 17,783,240 8,033 spares for both P and G lists ST36530 6.5 GB 12,715,920 8,033 spares for both P and G lists ST34520 4.55 GB 8,888,924 8,0 33 spares for both P and G lists

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 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 block descriptor bytes 1, 2 and 3. A value greater than the maximum number of LBAs is rounded down to the maximum capacity. Byte 0 is not used as the density code, but as the MSB of number of LBAs.
512 byte/sector User LBAs Sparing
SCSI Interface Product Manual
(part number 77738479). Refer to the Parameter list block

3.7 Factory installed accessories

The drive ships with a small bag of the two jumper 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 a maximum LBA as shown in Section 3.6 .
• 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.
• ESD and physical protection is accommodated by a protective plate called SeaShield which attaches to the PCB.

3.9 Accessories (user installed)

No accessories offered.
Medalis t Pr o P roduct Manual, Rev. D 9

4.0 Performance characteristics

4.1 Internal drive characteristics (transparent to user) ST39140 ST36530 ST34520

Read/Write Heads 8 6 4 Trac ks/Surface, Total 9,006 9,006 9,006 Tracks (user accessible) Trac ks/Inch 9,570 9,570 9,570 TPI Peak Bits/Inch 1,715.2 1,715.2 1,715. 2
Mbits/in Internal Data Rate 110-193.88 110-193.88 110-193.88 Mbits/sec (variable with zone) Disc Rotational Speed 7,200 7,200 7,200 r/min (±0.05%) Average Rotational Latency 4.17 4.17 4. 17 msec

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

The values given in Section 4.2.1 apply to all models of the Medalist Pro family unless otherwise specified. Refer to Section and to the
SCSI Interface Product Manual
(part number 77738479) for additional timing
details.

4.2.1 Access time [8]

Including Cont roller Overhead (without disconnect) [1] [4]
Drive Level
Read Write
msec Average – Typical [ 3] 9.5 10. 5 Single Track– Typical [3] 2.5 3.5 Full Stroke – Typical [3] 21.0 23.5
2
*[ ] All notes for Section 4.2 are listed at end of Section 4.2.3.
10 Medalist Pro Product Manual, Rev. D

4.2.2 Format command execution time (minutes) [1]* ST39140 ST36530 ST 34520

Maxim um (with verify) 36 24 18 Maximum (no verify) 18 12 9

4.2.3 Generalized performance characteristics

Sector interleave 1 to 1
Data buffer transfer rate to/from disc media (one 512-byte sector):
Min. [4]* 13.7 MByte/sec Avg. [4] 19.9 MByte/sec Max. [4] 23.8 MByte/sec
Data buffer transfer rate to/from disc media: (< 1 track):
Min. [4] 10.5 MByte/sec Avg. [4] 15.2 MByte/sec Max. [4] 18.3 MByte/sec
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-3 Fast-20 (Ultra-1 SCSI):
(8 bit data bus models) 20 Mbytes/sec (16 bit data bus models) 40 Mbytes/sec
Synchronous transfer rate for SCSI-3 Fast-40 (Ultra-2 SCSI):
(8 bit data bus models) 40 Mbytes/sec (16 bit data bus models) 80 Mbytes/sec
Synchronous transfer rate for fast SCSI-2: 5 to 10 Mbytes/sec (8 bit data bus models)
Synchronous transfer rate for fast SCSI-2: 10 to 20 Mbytes/sec (16 bit data bus models).
Sector Sizes: 512 byte user data blocks
Read/write consecutive sectors on a track Yes Flaw reallocation performance impact (for flaws reallocated at format time,
No performance hit
all P and G list entries will be slipped). Overhead time for head switch (512 byte sectors) in sequential mode 2.5 msec (typical)
Overhead time for one track cylinder seek (cylinder skew) <3.5 msec (typical) Average rotational latency 4.17 msec
*[] Notes listed at end of S ec tion 4. 2.3.
Medalis t Pr o P roduct Manual, Rev. D 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 access times are measured und er nominal conditions of tempe rature, 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 tar t/stop ti me

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
SCSI Interface Product Manual
(see 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 select pre fetch and cache features the host sends the Mo de Select com­mand with the proper values in the a pplicable bytes in Mode Page 08h (see 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 Tables 9, 10, and 11.

4.5 Cache operation

In general, 380 Kbytes of the 512 Kbytes (860.5 Kbytes of 1,024 K bytes for “LC” and “LW” drives) of physical buffer space in the drive can be used as storage space for cache operations. The buffer contains memory 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 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 segmented with required number of segm ents) is still used, but only as circular buffer segments during disc medium read ope rations (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 retr ieve it. The retrieved data merely passes through some buffer segment on the way to the
, part number 77738479).
SCSI Interface Product Manual
SCSI Interface Product Manual
(part numbe r 77738479), data req uested by the
,
12 Medalist Pro Product Manual, Rev. D
host. On a cache “miss”, all data transfers t o the host are in accordance with “buffer-full” rat io 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
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 disconnec t/reconn ec t sp ecification 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 LBs from the disc and transfers them into a segment, and th en the seg­ment to the host.
2. If the prefetch feature is enabled, refer to Section 4.5.2 for operation from this point.

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 dat a to be written to the medium is stored in one buffer segment.
SCSI Interface Product Manual
(part number 77738479).
Write caching is enabled independ ently from read caching. For write caching, the same buffer space and seg­mentation is used as set up for read functions. The buffer segmentation scheme is set up or changed indepen­dently, having nothing to do with wh ether or not read and write caching is enabled or disabled. When a write command is issued , the cache is first checked to see if a ny logical blocks that are to be written are al ready stored in the cache from a previous read or wr ite command. If there are, the respective cache segm ents are cleared. The new data is cached for subsequent Read commands.
If the number of write data logical blocks exceeds the size of the segment then 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. However, the drive does not overwrite data that has not yet been written to the medium.
Tables 9, 10, and 11 show 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 i mmedi ately beyond that which was requested by a Read command can be retrieved and stored in the buffer for immediate 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 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 e s 10 an d 11).
Whenever prefet ch (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.
Medalis t Pr o P roduct Manual, Rev. D 13

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).
Seek Errors
Less than 1 in 10
Read Error Rates [1]
Recove r e d Data Unrecovered Data Miscorrected Data
Less than 1 errors in 10 Less than 1 sector in 10
Less than 1 sector in 10 MTBF 800,000 hours Service Life 5 years Preventive Maintenance None required
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 def ined 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.
7
seeks
10
bits transferred (default settings)
14
bits transferred (default settings)
21
bits transferred

5.1.1 Environmental interference

When evaluating syste ms 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 errors

Write errors can occur a s a result of media defects, environmental interference, or equipment malfunction. Therefore, write errors are not predictable as a function of the number of bits passed.
If an unrecoverable write error 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 (exc luding media defects).
14 Medalist Pro Product Manual, Rev. D

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 one recoverable seek errors in 10
7
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 follow 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
Interface Product Manual
(part numbe r 77738479) for Request Sense in formation. Appendix A of this ma nual
SCSI
lists the sense keys and additional sense codes supported by the drives of this manual.

5.2 Reliability and service

You can enhance the reliability of Medalist Pro disc drives by ensuring that the drive receives adequate 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 preventiv e maintenance shall be required.

5.2.3 Service life

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

5.2.4 Service ph ilosophy

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. Troubleshooting 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.
Medalis t Pr o P roduct Manual, Rev. D 15

5.2.6 Hot plugging Medalist Pro disc drives

The ANSI SPI-2 (T10/1142D) docum ent defines the physical requirements for removal and insertion of SCSI devices on the SCSI bus. Four cases are addressed. The cases are differentiated by the state of the SCSI bus when the removal or insertion occurs.
Case 1 A ll bus devices powered off during removal or insertion Case 2 RST signal asser ted continuousl y during rem oval or insertion Case 3 Current I/O processes not allowed during insertion or removal Case 4 Current I/O process allowed during insertio n or removal, except on the device being changed
Seagate Medalist Pro disc drives support four hot plugging cases. Provision shall be made by the system such that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus. A device being removed shall maintain power and ground connections af ter the disc onnec­tion of any device signal contact from the bus (see SFF-8046, SCA-2 specification).
It is the responsibility of the systems integrator to assure that no hazards from temperature, energy, voltage, or ESD potential are presented during the hot connect/disconnect operation .
All I/O processes for the SCSI device being inser ted or removed shall be quiesce nt. All SCSI devices on the bus shall have receivers that conform to the SPI-2 standard.
If the device being hot plugged uses single-ended (SE) drivers and the bus is currently operating in low voltage differential (LVD) mod e, then all I/O proce sses for al l devices on the bus must be completed, and the bus q ui­esced, before attempting to hot plug. Following the insertion of the newly installed device, the SCSI host adapter must issue a B us Rese t, followed by a synchronous transfer negotiation. Failure to perform the SCSI Bus Reset could result in erroneous bus operations.
The SCSI bus termination and termination power source shall be external to the device being inserted or removed.
End users should not mix devices with high voltage differential (HVD) drivers and receivers and devices with SE, LVD, or multimode drivers and receivers on the same SCSI bus since the common mode voltages in the HVD environment may not be controlled to safe levels for SE and LVD devices (see ANSI SPI-2).
The disc drive spindle must come to a complete stop pri or to completely removing the drive from the cabinet chassis. Use of the Stop Spindle command or partial withdrawal of the drive, enough to be disconnected from the power source, prior to removal are methods for insuring that this requirement is met. During drive insertion, care should be taken to avoid exceeding the limits stated in Section 6.4.4, "Sh ock and vibration," o f this man­ual.

5.2.7 S.M .A . R . T.

S.M.A.R.T. is an acronym for Self-Monitoring Ana lysis and Re porting Techn ology. This technology is intended to recognize conditions that indicate imminen t drive failure and is designed t o provide sufficient war ning of a failure to allow you to back up the data before an actual failure occurs.
Note. The drive’s firmware will monitor specific attributes for degradation over time but can’t predict instanta-
neous drive failures.
Each monitored attribute has been selected to monitor a spe cific set of failure conditions in the operating per­formance of the drive and the thresholds are optimized to minimize “false” and “failed” predictions.
Controling S .M .A.R.T.
The operating mode of S.M.A.R.T. is controlled by the DEXCPT and PERF bits on the Inf o rmational Exceptions Control mode page (1Ch). Use the DEXCPT bit to enable or disable the S.M.A.R.T. feature. Setting the DEX­CPT bit disables all S.M.A.R.T. functions. When enabled, S.M.A.R.T. collects on-line data as the drive performs normal read an d write operations. When the PERF bit is set, the drive is considered to be in “On-line Mode Only” and will not perform off-line functions.
You can measure off-line attributes and force the drive to save the data by using the Rezero command. Forcing S.M.A.R.T resets the timer so that the next scheduled interrupt is in two hours.
16 Medalist Pro Product Manual, Rev. D
You can interrogate the drive through the host to determine the time remaining before the next scheduled mea­surement and data logging process occurs. To accomplish this, issue a Log Sense command to log page 0x3E. This allows you to control when S.M.A.R.T. interruptions occ ur. Forcing S.M.A.R.T. with the RTZ command resets the timer.
Performance impact
S.M.A.R.T. attribute data is saved to the disc so that the even ts that caused a predictive failure can be recre­ated. The drive measures and saves parameters once every two hours subject to an idle period on the inter­face. The process of measuring off-line attribute data and saving data to the disc is uninterruptable. The maximum on-line only (DESCPT = 0; PERF = 1) processing delay is 60 ms. The maximum fully-enabled (DEX­CPT = 0, PERF = 0) processing delay is 450 ms.
Repor tin g c o ntrol
Reporting is controlled in the Informational Exceptions Control mode page (1Ch). Subject to the repor ting method, the firmware w ill issue to the host an 01-5D XX sen se code. The error code is prese rved through bus resets and power cycles.
Determining rate
S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded errors increases to an unacceptable level. To determine rate, error events are logged and compared to the number of total operations for a given a ttribute. The interval defines the number of operations over which to measure the rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter.
S.M.A.R.T. measures error rates. All errors for each monitored attribute are recorded. A counter keeps track of the number of errors for t he curren t interval. This counter is referred to as the Failure Counter.
Error rate is the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to set thresholds for the number of errors and their interval. If the number of errors ex ceeds the threshold before the interval expires, the error rate is considered to be unacceptable. If the number of errors does not exceed the threshold before the interval expires, the error rate is considered to be acceptable. In either case, the inter­val and failure counters are reset and the process starts over.
Predictive failures
S.M.A.R.T. signals predictive failures when the drive is p erforming unac cept ably for a period of tim e. The firm­ware keeps a running count of the number of times the error rat e for each attribute is unacceptable. To accom­plish this, a counter is in cremented eac h time the error rate is una cceptable and decrem ented (not to exceed zero) whenever the error rate is acceptable. If the counter continually increments such that it reaches the pre­dictive threshold, a predictive failure is signaled. This counter is referred to as the Failure History Counter. There is a separate Failure History Counter for each attribute.

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 onconformance to the appl icable 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 transpor ting 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 improper ly packaged or obvious ly dam aged in tran­sit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends shipping by an air-ride carrier experienced in handling computer equipment.
Medalis t Pr o P roduct Manual, Rev. D 17
Product repair and return information
Seagate customer service cent ers are the only facil ities 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).
Medalis t Pr o P roduct Manual, Rev. D 19

6.0 Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of Medalist Pro 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 2a: DC power require me nts for N/W/WC models
ST39140 ST36530 ST34520 N/W/WC
Notes
Vol tage +5 V +12 V +5 V +12 V +5 V +12 V Regulation [5] ± 5% ±5%[2] ±5% ±5%[2] ±5% ±5%[2] Maximum operating current DC [1] 0.55 2.4 0.55 2.4 0.55 2.4 Average idle current DCX Maximum starting current
(peak DC) DC
(peak AC) AC Delayed motor start (max) DC [1][4] 0.51 0.13 0.51 0.13 0.51 0.13 Peak operating current
Typical DCX
Maximum DC
Maximum (Peak)
[1] 0.51 0.81 0.51 0.81 0.51 0.81
[3] [3]
[1][6] [1]
Single-ended
2.5 2.5 2.5
0.51
0.55
0.96
1.17
N/W/WC Single-ended
0.51
0.55
0.96
1.17
N/W/WC Single-ended
0.51
0.55
0.96
1.17
T able 2b: DC po we r requirements for LW/LC models
ST39140 ST34520 LW/LC
Notes
Vol tage +5 V +12 V +5 V +12 V Regulation [5] ±5% ±5%[2] ±5% ±5%[2] Maximum operating current DC [1] 0.81 2. 4 0.81 2.4 Average idle current DCX Maximum starting current
(peak DC) DC
(peak AC) AC Delayed motor start (max) DC [1][4] 0.51 0.16 0.51 0.16 Peak operating current
Typical DCX
Maximum DC
Maximum (Peak)
Notes for Ta bles 2a and 2b.
[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-
[1] 0.53 0.90 0.53 0.90
[3] [3]
[1][6] [1]
LVD
0.58
0.81
2.5 2.5
1.0
1.53
LW/LC LVD
0.58
0.81
1.0
1.37
20 Medalist Pro Product Manual, Rev. D
pleted and that the drive is able to accept selection by the host initiator. [3] See +12 V current profile in Figure 3a. [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 tol erance 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 2a:
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 star t ­ing current must be available to each device.

6.2.1 Conducted noise immunity

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

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 automatically delay motor start based on t he 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 rmation. To delay the motor until the drive receives a Start Unit command, enable the Enable Motor Start option on the J2 connector.
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