seagate ST34501FC Installation guide

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Cheetah 4LP FC Disc Drive

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ST34501FC

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Product Manual, Volume 1

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Cheetah 4LP FC Disc Drive

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ST34501FC

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Product Manual, Volume 1

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© 1997 Seagate Technology, Inc. All rights reserved
September 1997

Publication number: 83329190, Rev. B

Seagate , Seagate Technology , and the Seagate logo are registered trademarks of Seagate T ech­nology, Inc. Cheetah, 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.

No part of this publication may be reproduced in any form without written permission from

Seagate Technology, Inc.

Printed in the United States of America

Revision status summary sheet

Revision Date Writer/Engineer Sheets Affected

A 07/11/97 L. Newman/P. Kassel All
B 09/30/97 L. Newman/P. Kassel 6, 7, 9, 10, 14, 15, 17, 21, 28, 33, 34, 37,

39, 48, 49, and 50.

Cheeta h 4LP FC Product Man ual, Rev. B 5

Contents

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

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

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

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

2.1.1.1 Electromagnetic susceptibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Electromagnetic com pliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.3 Reference d ocuments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.0 General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Standard features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.2 Media description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.3 Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.4 Re liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.5 Unformatted and formatted capacit ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.6 Factory-installed accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.7 Factory-installed options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.8 User-installed accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

4.1 Internal drive characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2 Seek performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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

4.2.2 Format command execution time for ≥ 512-byte sectors . . . . . . . . . . . . . . . . . . . . . 9

4.2.3 General performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.3 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.4 Prefetch/multi-segmented cache control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.5 Cache operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.5.1 Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.0 Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3

5.1 Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.1 Environmental inte rference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.2 Interface errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.3 Write errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.4 Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.2 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.3 Re liability and ser vic e. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.3.1 Mean time between failure (MTBF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.3.2 Preventive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.3.3 Service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.3.4 Service philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.3.5 Service tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.3.6 Product warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.3.7 Hot plugging the drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.0 Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.1 AC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.2 DC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6.2.1 Conducted noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.2.2 Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.2.3 12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.3 Power dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

6.4 Environmental limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8

6.4.1 Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4.3 Effective altitude (sea level reference) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6 Cheetah 4LP FC Product Manual, Rev. B

6.4.4.1 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

6.4.4.2 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 0

6.5 Electrom agnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

6.6 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

7.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

7.1 Drive inte rnal defects/errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

8.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

8.1 Drive ID/option selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

8.2 LED connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

8.2.1 J6 connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

8.3 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

8.4 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 6

8.4.1 Air flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

8.5 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

8.6 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

9.0 Interface requiremen ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

9.1 FC-AL features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

9.1.1 Fibre Channel link service frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

9.1.2 Fibre Channel task management functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

9.1.3 Fibre Channel task management responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

9.1.4 Fibre Channel port login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

9.1.5 Fibre Channel port login accept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

9.1.6 Fibre Channel Process Login (PRLI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

9.1.7 Fibre Channel Process Accept (ACC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

9.1.8 Fibre Channel Arbitrated Loop options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

9.2 Dual port support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

9.3 SCSI commands s upported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

9.3.1 Inquiry data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

9.3.2 Mode Sense data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

9.4 Miscellaneous operating features and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

9.5 FC-AL physical interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.5.1 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.5.1.1 Physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.5.2 Connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

9.5.3 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

9.5.4 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

9.5.5 FC-AL transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

9.5.6 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

9.5.7 Fault LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

9.5.8 Active LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

9.5.9 – Enable Bypass Signal Port A - Port B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

9.5.10 Motor start controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

9.5.11 SEL ID lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

9.6 Signal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

9.6.1 TTL input characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

9.6.2 LED driver signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

9.6.3 Differential PECL output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

9.6.4 Differential PECL input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

10.0 Seagate technical support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Cheeta h 4LP FC Product Man ual, Rev. B 7

List of Figures

Figure 1. Cheetah 4LP FC family disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Cheetah 4LP FC disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3. Typical Cheetah 4LP FC drive +12V current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 4. Mounting co nfiguration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 5. Physical i nterface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 6. LED indicator connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 7. Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 8. PCB temperature measurement locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 9. HDA case temperature measurement location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 10. Physical interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 11. Port bypass circuit physical interconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 12. FC-AL SCA device connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 13. J6 connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 14. FC-AL transmitters and receivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 15. Transmit eye diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 16. Receive eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Cheeta h 4LP FC Product Man ual, Rev. B 1

1.0 Scope

This manual describes Seagate® CheetahTM 4LP FC (Fibre Channel) disc drives.
Cheetah 4LP FC drives support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifica-

tions to the extent described i n this manual. The
describes the general Fibre Channel Arbitrated Loop characteri stics of this and other Seagate Fibre Channel
drives.

Figure 1. Cheetah 4LP FC family disc drive

Fibre Channel Interface Manual

(part number 77767496)

Cheeta h 4LP FC Product Man ual, Rev. B 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 host eq uipment to provide adeq uate power and environment in order to a chieve opti­mum performance and c ompliance 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 mo unte d in o rder to guarante e th e spec ified pe rformanc e char­acteristics. Mounting by bottom holes must meet the requirements of Section 8.5.

2.1 Standards

The Cheetah 4LP FC family complies with Seagate standards as noted in the appropriate sections of this man­ual and the Seagate

The Cheetah 4LP F C disc drive is a UL recognized componen t per UL1 950, CSA c er tified to CSA C22.2 No.
950-M89, and VDE certified to VDE 0805 and EN60950.

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 subject 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 does not provide adequate shielding. If the I /O cables are external t o
the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host con­troller.

Fibre Channel Interface Manual

, part number 77767496 (Vol. 2).

2.1.1.1 Electromagnetic susceptibility

As a component assembly, the drive is not required to meet any susceptibility performance requirem ents. It is
the responsibility of those integrating the dri ve within their system s to perform thos e tes ts req uired a nd desig n
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 2, DC power requirements.

2.2 Electromagnetic compliance

Seagate uses an independen t laboratory to confirm compliance 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 model complies to the directives/standard(s), we cannot guarantee

that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance
and provide the appropriate 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 May 1989 as amended by Directive 92/31/EEC of 28 April 1992 and
Directive 93/68/EEC of 22 July 1993.

4 Cheetah 4LP FC Product Manual, Rev. B

Australian C-Ti ck

If this model has the C-Tick Marking it complies with the Au stralia/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

Cheetah 4LP FC Installation Guide

Seagate part number: 83329180

Fibre Channel Interface Manual

Seagate part number: 77767496

SCSI Interface Product Manual

Seagate part number: 77738479

ANSI Fibre Channel Documents

X3.230-1995 FC Physical and Signaling Interface (FC-PH)
X3.272-19946 FC Arbitrated Loop (FC-AL)
X3.269-1996 Fibre Channel Protocol for SCSI (FCP)
TR X3.XXX-199X Private Loop SCSI Direct Attach

ANSI Small Computer System Interface (SCSI) Documents

X3.131-1994 (SCSI-2)

X3.270-199X (SCSI-3) Architecture Model
SFF-8045 Specification for 40-pin SCA-2 Connector with Parallel Selection.
In case of conflict between this document and any referenced document, this document takes precedence.

Cheeta h 4LP FC Product Man ual, Rev. B 5

3.0 General description

Cheetah 4LP FC drives are random access storage devices designed to suppor t the Fibre Channel Arbitrated
Loop (FC-AL) and SCSI Fibre Channel Protoco l as described in t he ANSI specifications, this doc ument, and

Fibre Channel Interface Manual

the
istics of this dr ive.

You can view the Fibre Channel interface simply as a transport vehicle for the supported command set
(ST34501FC drives use the SCSI command set). In fact, the Fibre Channel interface is unaware of the content
or meaning of the information bein g transported. It simply packs the SCSI commands in frames, transports
them to the appropriate devices, and provides error checking to ensure that the information reaches its destina­tion accurately. Refer to the documents referenced in Section 2.3 if you require additional information about the
Fibre Channel interface, FC-AL topology, or the SCSI fibre channel protocol.

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

Refer to Figure 2 for an exploded view of the drive. Never disassemble the HDA . This exploded view is for infor­mation only. Do not attempt to ser vice items in the sealed enclosure (heads, medi a, actuator, etc.) as this
requires special facilities. The drive contains no par ts replaceable by the user and open ing the HDA for any
reason voids your warranty.

(part number 7776 7496) which describes the general interface character-

Figure 2. Cheetah 4LP FC disc drive

Cheetah 4LP FC

sibility of destroying or degrading data by landing in the data zone. The heads automatically go t o the landing
zone when power is removed from the drive.

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

The drives also use a high-performance actuator assembly design that provides excellent performance with
minimum power dissipation.

drives use a dedicated lan ding zone at the inner m os t radius of the m edia to elim inate th e pos-

6 Cheetah 4LP FC Product Manual, Rev. B

3.1 Standard features

Chee t ah 4LP F C

drives have the following standard features:

• Integrated dual port FC-AL controller

• Support for FC-AL (Fibre Channel Arbitrated Loop)

• Differential copper FC drivers and receivers

• Supports up to 16 initiators

• Downloadable firmware using the FC-AL interface

• Drive selection ID and configuration options are set on the FC-AL backpanel or through interface com-

mands. Jumpers are not required on the drive.

• Fibre Channel worldwide name uniquely identifies the drive and each port

• User-selectable logical block size (180 to 4,096 bytes)

• Selectable frame sizes from 128 to 512 bytes

• Reallocation of defects on command (post format)

• Industry standard 3.5-inch low profile (1 inch high) form factor dimensions

• Programmable logical block reallocation scheme

• Flawed sector reallocation at format time

• Programmable autowrite and read reallocation

• Reed-Solomon error correction code for header and data fields

• Sealed head and disc assembly (HDA)

• No preventive maintenance or adjustments required

• Dedicated head landing zone

• Automatic shipping lock

• Embedded Grey Code track address to eliminate seek errors

• Self-diagnostics performed at power on

• 1:1 interleave

• Zone bit recording (ZBR)

• Vertical, horizontal, or top down mounting

• Dynamic spindle brake

• 1,024 Kbyte data buffer (see Section 4.5)

• Embedded servo design

3.2 Media description

The media used on the drive has a diameter of approximately 95 mm (approximately 3.7 inches). The alum i­num substrate is coated with a thin film ma gnetic material, overcoated with a proprietary p rotective layer for
improved durability and environmental protection.

3.3 Performance

• Programmable multi-segmentable cache buffer

• 106.3 Mbytes/sec maximum instantaneous data transfers

• 10,033 RPM spindle; average latency = 2.99 msec

• Command queuing of up to 64 commands

• Background processing of queue

• Supports start and stop commands

• Adaptive seek velocity; improved seek performance

3.4 Reliability

• 1,000,000 hour MTBF (Class A computer room environment)

• Fibre Channel (FC) interface transports SCSI protocol through CRC protected frames

• LSI circuitry

• Balanced low mass rotary voice coil actuator

• Self-Monitoring Analysis and Reporting Technol ogy (S.M.A.R.T.)

• Dithering

Cheeta h 4LP FC Product Man ual, Rev. B 7

3.5 Unformatted and formatted capacities

The standard OEM models are formatted to 512 bytes per block.
ST34501FC drives uses a regional sparing scheme. The drive is divided into regions that are each 12 cylinders

wide. Each region has 108 spares when formatted with 512-byte logical blocks.

Formatted Unformatted

ST34501FC 4.52 Gbytes 5.59 Gbytes

Users having the necessary equipment may modify the data block size before issuing a format command and
obtain different formatted capacit ies than those listed. User-available capacity also depends on the spare real­location scheme you select. See the Mode Select command and the Format command in the

Interface Manual

(part number 77767496).

Fibre Channel

3.6 Factory-installed accessories

OEM standard drives are shipped with the Cheetah 4LP FC Installation Guide (part number 8332918 0).

3.7 Factory-installed options

You may order the following items which are incorporated at the manufacturing facility during production or
packaged before shipping:

• Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection
against transit damage. Units shipped individually require additional protection as provided by the single unit
shipping pack. Users planning single unit distribution should specify this option.

3.8 User-installed accessories

The following accessories are available. All kits may be installed in the field.

• Evaluation kit, part number 73473641.
This kit provides an adapter card (“T-card”) to allow cable connections for two FC ports and DC power. Two
twin axial cables, 6 feet in length, are included for the input and output connections to the FC interface.

Cheeta h 4LP FC Product Man ual, Rev. B 9

4.0 Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of
Cheetah 4LP FC drives.

4.1 Internal drive characteristics

ST34501FC

Drive capacity 5.59 ..................Gbytes (unformatted)

4.52 ..................Gbytes (formatted with 512-byte logical blocks)

Read/write data heads 8

Bytes per track 115,078 ............Bytes (average, unformatted)

Bytes per surface 751.0 ................Mbytes (unformatted)

Cylinders/tracks per surface 6,526................Tracks (user accessible)

Tracks per inch 6,932 ................TPI

Peak bits per inch 135,401 ............BPI

Internal data rate 122-177 ........ .. ..Mbits/sec (variable with zone)

Disc rotation speed 10,033 ± 0.5%..rpm

Avg ro tational latency 2.99 ........ ..........msec

4.2 Seek performance characteristics

Refer to paragraph 9.5, “FC-AL physical interface” and to the

Fibre Channel Interface Manual

(part number

77767496) for additional timing details.

4.2.1 Access time

Including controller overhead
Read Write

Av erage Typical
Single track Typical
Full stroke Typical

1. Execution time meas ured from receipt of the FCP Command to arbitr ation for the FCP Response.

2. Assumes no errors and no sector has been relocate d.

3. Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as

measured on a representative sample of drives.

4. Access time = contro ll er overhead + average seek ti me .

Access to data = contr oller overhead + average seek time + latency time.

3,4

3,4
3,4

7.7 8.7

0.98 1.24

18.2 19.2

1, 2

(msec)

4.2.2 Format command execution time for ≥ 512-byte sectors

ST34501FC

Maximum (with verify) 60 minutes
Maximum (without verify) 36 minutes

10 Cheetah 4LP FC Product Manual, Rev. B

4.2.3 General performance characteristics

ST34501FC

Minimum sector interleave 1 to 1

Data buffer to/from disc media (one 512-byte logical block)*

Minimum 15.25 MBytes/sec
Maximum 22.125 MBytes/sec

Fibre Channel Interface maximum instantaneous transfer rate 106.3 Mbytes/ sec*

Logical block size s

Default i s 512-byte data blocks
Variable (180 to 736 bytes) in multipl es of 4 bytes
Variable (768 to 4,096 bytes) in multi ples of 32 bytes

Read/write consecu ti ve sectors on a track
Overhead time for head switch in sequential mode
Overhead time for one track cylinder switch in sequenti al mode
Av erage rotational latency

*Assumes no errors and no relocated logica l blocks.

Yes

0.798 msec
<1.064 msec (typical)

2.99 m sec

4.3 Start/stop time

If the Motor Start option is disabled, the drive becomes ready within 30 seconds after DC power is applied. If a
recoverabl e error condition is detected during the start sequence, the drive ex ecutes a recovery procedure and
the time to become ready may exceed 30 seconds. During the start sequen ce, the drive responds to some
commands over the FC-AL interface. Stop time is less than 30 seconds (maximum) from removal of DC power .

If the Motor Start option is enabled, the internal controller accepts the com mands listed in the

Interface Manual

less than 3 seconds aft er DC power has been applied. A fter the Motor Star t command has

Fibre Channel

been received, the drive becomes ready for normal operations within 30 seconds (excluding the error recovery
procedure). The Motor Start command can also be used to comman d the drive to stop the spindle.

There is no power control switch on the drive.

4.4 Prefetch/multi-segmented cache control

The drive provides a prefetch/multi-segmented cache algorithm that in many cases can en hance system per­formance. To sel ect this feature the host sends the Mode Select com m and with t he proper values in the appli­cable bytes in page 08h. Default is prefetch and read cache enabled.

If the Prefetch feature is enabled, data i n cont igu ous lo gical blocks on the disc immedi ately beyond that wh ich
was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buf f er
to the host on subsequent Read commands that request those logical blocks (this is true even if cache opera­tion is disabled). To enable Prefetch, use Mode S elect page 08h, byte 12, bit 5 (Disable Read Ahea d - DRA
bit). DRA bit = 0 enables prefetch.

Since data that is prefetched replaces data already in some buffer segments, the host can limit the amount of
prefetch data to optimize system p erformance. The Max Prefetch field (bytes 8 and 9) limits the amount of
prefetch. The drive does not use the Prefetch Ceiling field (bytes 10 and 11).

4.5 Cache operation Note. Refer to the

Fibre Channel Interface Manual

for more detail concerning the cache bits.

Of the 1,024 Kbytes physical buffer space in the drive, 967.5 Kbytes can be u sed as a cache. The cac he can
be divided into logical segments from which data is read and to which data is written.

Cheeta h 4LP FC Product Man ual, Rev. B 11

The drive keeps track of the logical block addresses of the data stored in each segment of the cache. If the
cache is enabled (see RCD bit in the
command is retrieved from the cache, if possible, before any disc access is initiated. Data in contiguous logical
blocks immediately beyond that requested by the Read comm and can be retrieved and stored in the cache for
immediate transfer to the initiator on subsequent read commands. This is referred to as the prefetch operation.
Since data that is prefetched may replace data already in the ca che s egm ent, an i nitiator c an l im it the am ount
of prefetch data to optimize system performance. The drive never prefetches more sectors than the number
specified in bytes 8 and 9 of Mode page 08h. If the cache is not enabled, 967.5 Kbytes of the buffer are used as
a circular buffer for read/writes, with no prefetch operation and no segmented cache operation.

The following is a simplified description of the prefetch/cache operation:
Case A—read command is received and the first logical block is already in cache:

1. Drive transfers to the initiator the first logical block requested plus all subsequent contiguous logical blocks

that are already in the cache. This data may be in multiple segments.

2. When a requested logical block is reached tha t is not in a ny segment , the dri ve fetches it and any rema in-

ing requested logical block addresses from the disc and puts them in a segme nt of the cache. The dr ive
transfers the remaining requested logical blocks from the cache to the initiator in accordance with the
“buffer-f ull” ratio specification given in Mode Select Disconnect/Reconnect parameters, page 02h.

3. The drive prefetches additional logical blocks contiguous to those transferred in step 2 above and stores

them in the segme nt. The drive stops filling the segment when the maximum prefetch value has bee n
transferred.

Fibre Channel Interface Manual

), data requested by the host with a read

Case B—read command is received and the first logical block address requested is not in any segment of th e
cache.

1. The drive fetches the requested logical blocks from the disc and transfers them into a segment, and then

from there to the initiator in accordance with t he “buffer-full” ratio specification given in Mode Select Dis­connect/Reconnect parameters, page 02h.

2. The drive prefetches additional logical blocks contiguous to those transferred in Case A, step 2 a bove and

stores t hem in the seg ment. The dr ive stops fillin g the segme nt when the maximum prefetc h value has
been transferred.

During a prefetch, the drive crosses a cylinde r bound ary to fetch data only if the Discontinuity (DISC) bit is set
to 1 in bit 4 of byte 2 of the Mode Select parameters page 08h. Default is zero for bit 4.

Each cache segment is actually a self-contained circular buffer whose length is an integer number of logical
blocks. The wrap-around capability of the individual segments greatly enhances the cache’s overall perfor­mance, allowing a wide range of us er-selectable configurations. The drive suppor ts operation of any integer
number of segments from 1 to 16. Divide th e 967.5 Kbytes in the buffer by the number of segm ent s to get the
segment size. Default is 3 segments.

4.5.1 Caching write data

Write caching is a write operation by the drive tha t makes use of a drive buffer storage area where the dat a to
be written to the medium is stored while the drive performs the Write command.

Write caching is enabled indepe ndently of read caching. Wr ite caching is disabled by default on ST34501FC
drives. To enable the write cache, use the Write Caching Enable (WCE) bit.

For write caching, the same buffer space and segmentation is used as set up for read functions. Wh en a write
command is issued , the cache is first checked to see if any lo gical 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 a 10-byte CDB Write command (2Ah) is issued with the data page out (DPO) bit set to 1, no write data is
cached, but the cache segm ents are s till checked and cleared, if need be, for any logical blocks that are being
written.

12 Cheetah 4LP FC Product Manual, Rev. B

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.

Cheeta h 4LP FC Product Man ual, Rev. B 13

5.0 Reliability specifications

The following reliability specifications assume correct host and drive operational interface, including all inter­face timings, power supply voltages, and environmental requirements.

See k error rate:
Recoverable media error rate

Less than 10 errors in 10
Less than 10 errors in 10

(using default settings):
Unrecovered media data:
Miscorrected media data:
Interface error rate:

Less than 1 sector in 10
Less than 1 sector in 10
Less than 1 error in 10

Less than 1 error in 10

See Section 9.6.4, “Differential PECL input.”
MTBF: 1,000,000 hours
Service life: 5 years
Preventive maintenance: None required

5.1 Error rates

The error rates stated in this manual assume the following:

• The drive is operated in accordance with this manual using DC power as defined in paragraph 6.2, “DC
power requirements.”

• The drive has been formatted with the FC-AL format commands.

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

8

seeks

11

bits transferre d

14

bits transferred

21

bits transferred

12

bits transferred with minimum receive eye.

14

bits transferred with typical receive eye.

5.1.1 Environmental interference

When evaluating systems operation under c onditions of electromagn etic interference (EMI), the performance
of the drive within the system is consid ered accept able if the dri ve does not generate an unrecoverable condi­tion.

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

• is not detected and corrected by the drive itself, or

• is not detected from the error or fault status provided through the drive or FC-AL interface, or

• is not recovered by normal drive or system recovery procedures without operator intervention.

5.1.2 Interface errors

An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the
device port connected to the receiver. The error may be detected as a running disparity error, illegal code, loss
of word sync, or CRC error. The total error rate for a loop of devices is the sum of the individual device error
rates.

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 w rite error occurs because of an equipment malfunction in the drive, the error is classified
as a failure affecting MTBF. Unrecoverable write errors are those that c anno t be correc ted wi thin t wo at tempts
at writing the record with a read verify after each attempt (excluding media defects).

5.1.4 Seek errors

A seek error is defined as a failure of the drive to position the heads to the addressed track. There must be no

8

more than ten recoverable seek errors in 10

physical seek operations. After detecting an initial seek error, the
drive automatically reseeks to t he addressed track up to three t imes. If a reseek is succ essful, the Extende d
Sense reports a seek positioni ng error (15h), no seek com ple te error (02h), or track follow error (09h), and the
sense key reports a recovered error (01h). If all three reseeks fail, a seek positioning error (15h) is reported

14 Cheetah 4LP FC Product Manual, Rev. B

with a Medium (03h) or Hardware error (04 h) repor ted in the Sense Key. This is an unrecoverable seek error.
Unrecoverable seek errors are classified as failures for MT BF calculations.

5.2 S.M.A.R.T.

S.M.A.R.T. is an acronym for Self-Monitoring Anal ysis and Re port ing Technology. This technol ogy is intended
to recognize conditions that indicate imminent drive failure and is designed t o provide sufficient warning of a
failure to allow you to back up the data before an actual failure occurs.

Note. The drive’s firmware will monitor s pecif ic attribut es for degradation over time but can’t predict instant a-

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 Informational 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 and wri te 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 attr ibutes and force the drive to save the data by using the RTZ command. Forcing
S.M.A.R.T resets the timer so that the nex t schedul ed interrupt is in two hours.

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 occur. 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 events 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 50 ms. The maximum fully-enabled (DEX­CPT = 0, PERF = 0) processing delay is 200 ms.

Repor tin g c on t rol

Reporting is controlled in the Informational Exceptions Control mode page (1Ch). Subject to the reporting
method, the firmware will issue to the host an 01-5D00 sens e code. The error c ode is pre served through bus
resets and power cycles.

Attribute FRU code Predictive fa il ure description

LBA reassignment
Fly height
Read data errors
Recovered TAs
Preamp detectable TAs
Seek errors
Track following errors
Spin-up errors
General fai lure

04
31
32
37
38
43
45
5B
EF

LBA reassignment exceeding limits
HDI errors exce eding limits
Read data errors exceeding limits
ERP TAs exceeding limits
WUS TAs exceeding limits
Seek error rate e xceeding limits
Servo settling errors exceeding limits
Spin-up retry count exceeding limits
Missi ng S M A RT co nt ro l in formation

Determining rat e

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 attribute. The i nte r val defines t he numb er of o perations over which t o m easure the
rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter.

Cheeta h 4LP FC Product Man ual, Rev. B 15

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 the current interval. This counter is referred to as the Failure Counter.

Error rate is the number of errors per operation. The al gorithm 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 exceeds 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 performing unacceptably for a period of t ime. The firm­ware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accom­plish this, a counter is incremented each time the error rate is unacceptable and decremented (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.

5.3 Reliability and service

The reliability of Cheetah 4LP F C disc drives can be enhanc ed by ensuring that t he drive receives adequate
cooling. This section provides recommended air-flow information, temperature measurements, and other infor­mation, which you can use to enhance the service life of the drive.

5.3.1 Mean time between failure (MTBF)

The production disc drive achieves an MTBF of 1,000,000 hours when operated in an average local disc drive
ambient temperature of 86°F (30°C) or less. Short-term excursions up to the specification limits of the operat­ing environment will no t affect MTBF performance. Operating the dri ve at ambient temperatures above these
values may adversely affect the drive’s ability to meet specifications. See Section 6.4, “Environmental limits” on
page 18.

The following expression defines MTBF:

MTBF = Estimated power-on operating hours in the period

Number of drive fail ures in the period

Estimated power-on operating hours means th e estimated total power-on hours for all drives in service. Dr ive
failure means any stoppage or substandard performance caused by drive malfunction.

Data is calc u lat e d o n a ro llin g-average base for a minimum perio d o f si x months.

5.3.2 Preventive maintenance

No routine scheduled preventiv e maintenance is required.

5.3.3 Service life

The drive has a useful service li fe of five years. Depot repair or replacement of major parts is permitted during
the lifetime.

5.3.4 Servi c e philosophy

Special equipment is required to repai r the drive HDA. To achieve the above service life, repairs must be per­formed only at a properly equipped and staffed Seagate ser vice and repair facility. Troubleshooting and repair
of PCBs in the field is not recommended because of the extensive diagnostic equipment required for effective
servicing. The drive warranty is voided if the HDA is opened.

5.3.5 Service tools

No special tools are required for site installation or recommended for site maintenance. The depot repair phi­losophy of the drive precludes the necessity for special tools. Field repair of the drive is not practical because
users cannot purchase individual par ts for the drive.

16 Cheetah 4LP FC Product Manual, Rev. B

5.3.6 Product warranty

Beginning on the date of ship men t to the c usto mer and c ont inuing for a period of five years, Seagate warrants
that each product (inc luding componen ts and s ubassemblies) that fails to function proper ly und er norm al use
due to defect in materials or workmanship or due to nonconformance to the app licable specifications will b e
repaired or replaced, at S eagate’s option and at no charge to the customer, if returned by customer at c us­tomer’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 the customer. For more detailed warranty information,
refer to the standard terms and conditions of purchase for Seagate products on your purchase documentation.

The remaining warranty for a particular drive can be determined by calling Seagate Customer Service at
1-800-468-3472. The drive serial number is required to determine remaining warranty information.

Shipping

When transporting or shipping a drive, use only a Seagate approved container. Keep your original box.
Seagate approved containers are easily identified by the Seagate Approved Package label. Shipping a drive in
a non-approved container voids the drive warranty.

Seagate repair centers may refuse receip t o f components improperly packaged or obviously dam aged in tran­sit. Contact your author ized Seagate d istributor to purc hase additional boxes. Seagate recommends shipping
by an air-ride carrier experienced in handling computer equipment.

Product repair and return information

Seagate customer service cente rs are the only fac ilities 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.

5.3.7 Hot plugging the drive

Inserting and removing the drive on the FC-AL will interrupt loop operation. The interruption occurs when the
receiver of the next device in the loop must synchroni ze to a different input signal. FC error det ection mecha­nisms, character sync, running disparity, word sync, and CRC are able to detect any error. Recov ery is initiated
based on the type of error.

The disc drive defaults to the FC-AL Monitoring state, Pass-through state, when it is powered-on by switching
the power or hot plugged. The control line to an o ptional por t bypass circuit (external to the dr ive), defaults to
the Enable Bypass state. If the bypass circuit is present, the next device in the loop will continue to receive the
output of the previous device to the newly inserted device. If the bypass circuit is not present, loop operation is
temporarily disrupted until the next device starts receiving the output from the newly inserted device and
regains synchronization to the new input.

The Pass-through state is disabled while the disc performs self test of the FC interface. The control line for an
external port bypass circuit remains in the Enable Bypass state while self test is running. If the bypass circuit is
present, loop operation may continue. If the bypass circuit is not present, loop operation will be halted while the
self test of the FC interface runs.

When the self test completes successfully, the control line to the bypass circuit is disabled and the drive enters
the FC-AL Initializing state. The receiver on the next device in the loop must synchronize to output of the newly
inserted drive.

If the self-test fails, the control line to the bypass circuit remains in the Enable Bypass state.
Note. It is the responsibility of the systems integrator to assure that no t emperature, energy, or voltage haz-

ard is presented during the hot connect/disconnect (hot plug) operation. Discharge the static electricity
from the drive carrier prior to inserting it into the system.

Caution. The drive motor must come to a complete stop prior to changing the plane of operation. This time is

required to insure data integrity.

Cheeta h 4LP FC Product Man ual, Rev. B 17

6.0 Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of the drive.

6.1 AC power requirements

None.

6.2 DC power requirements

The voltage and current requirements for a single drive are shown below.Values indicated app ly at the drive
connector.

Table 1: DC power requirements

ST34501FC
+5V

±5%

Voltage Regulation Notes

Avg idle current [1] [8] 1.000 0.874
Max start current (peak DC) [3] [6] 1.074 2.239
Delayed m otor start (max) [1] [4] 0.634 0.177
Operating current: [7]
Ty pical [1] [6] 1.036 1.028
Maximum [1] 1.083 1.075
Max (peak) 1.239 2.196

[5]

(Amps)

+12V
±5%

[2]

(Amps)

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

ues.

[2] A –10% tolerance is allowed during initial spindle start but must retur n to ±5% before reaching 10,033

RPM. The ±5% must be maintained after the dri ve 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 +12V current profile in Figure 3.
[4] This condition occurs when the Motor S tart opt ion is enabled and the drive has not yet received a Star t

Motor co mmand.
[5] See paragraph 6.2.1, “Conducted noise immunity.” Specified voltage tolerance includes ripple, noise, and

transient response.
[6] At power-up the motor current regulator limits the 12V current to an average value of less than 2.0A,

although instantaneous pea ks may exceed this value. These peaks should m easure 5 msec duration or

less.
[7] Operating condition means a third stroke seek at OD and Read One track. A command is issued every

0.108 seconds.

[8] All power-saving features enabled.

General DC power requirement notes.

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

shown.

2. The +5V and +12V supplies should 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.

18 Cheetah 4LP FC Product Manual, Rev. B

6.2.1 Conducted noise immunity

Noise is specified as a peri odic and random distribution of frequenc ies 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.

+5V +12V ( with spindle motor not running)

0 to 100 kHz 150mV 150mV
100 kHz to 10 MHz 100mV 100mV

6.2.2 Power sequencing

The drive does not requ ire power sequenc ing. The d rive protects against ina dvertent wr iting durin g power-up
and down.

6.2.3 12V current profile

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

+12 Volt Current during spindle start

3

Envelope of waveform

Average value of waveform

2

Amps

1

0

T0 T1 T3

T2

0 2 4 6 8 10121416

Seconds

Figure 3. T ypical Cheetah 4LP FC drive +12V current profile

T0 Po wer is applied to the driv e.
T1 Controller sel f-tests are perf ormed.
T2 Spindle begins to accelerate under cur rent limiting after performing int ernal diagnostics.
T3 Spindle is up to speed and the Head -Arm restraint is unlocked.

Note. All times and currents are typical. S ee Table 1 for maximum start ing and operating current require-

ments.

6.3 Power dissipation

Typical seek and read power dissipation is 18.3 watts (63.0 BTUs per hour) of DC power average at nominal
voltages. Typical power dissipation under idle conditions is 15.5 watts (53 BTUs per hour).

6.4 Environmental limits

Temperature and hu mi dity values experienced by the d rive must be suc h that cond ens ation doe s not occur o n
any drive part. Altitude and atmospheric pressu re specifications are referenced to a standard day at 58.7°F
(14.8°C). Maximum wet bulb temperature is 82°F (28°C).

Cheeta h 4LP FC Product Man ual, Rev. B 19

6.4.1 Temperature

a. Operating

The MTBF specification for the drive (1,000,000 hours) is based on operating at a local ambient tempera­ture of 77°F (25°C). Occasional excursions to drive ambient temperat ures to 122°F (50 °C) may occur with­out impact to specified MTBF. The enclosure for the drive should be designed such that the case
temperatures at the locations specified in Figures 8 and 9 are not exceeded. Air flow may be needed to
achieve these temperature values. Continual or sustained operation at case temperatures above these val­ues will degrade MTBF.

The drive meets all specifications over a 41°F to 113°F (5°C to 45°C) drive ambient temperature range with
a maximum gradient of 36°F (20°C) per hour when the case temperature limits specified above are not
exceeded.

b. Non-operating

Non-operating temperature should remain between –40°F to 158°F (–40°C to 70°C) package ambient with
a maximum gradient of 36°F (20°C) per hour. This assumes that the drive is packaged i n the sh ipping c on­tainer designed by Seagate.

6.4.2 Relative humidity

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

5% to 95% relative humidity with a maximum gradient of 10% per hour.

b. Non-operating

5% to 95% relative humidity with a maximum gradient of 10% per hour.

6.4.3 Effective altitude (sea level reference)

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 speci fied in th is docum ent are me as ured di rectly o n t he drive chassis. If the drive is
installed in an enclosure to which the stated sh ock and/or vibration cr iteria are appli ed, reson ances 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 in a vertical
or horizontal position.

6.4.4.1 Shock

a. Operating (normal)

The drive, as installed for normal op eration, wi ll o perate erro r free while s ubjected t o i nte rm itt ent s hock not
exceeding 2.0 Gs at a m aximum duration of 11 msec (ha lf s inewave). Shock may be applied in the X, Y, or
Z axis.

b. Operating (abnormal)

Equipment as installed for norm al operation will not incur physical damage whi le subjected to inter mittent
shock not exceeding 10 Gs at a maximum duration of 11 msec (ha lf 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.

20 Cheetah 4LP FC Product Manual, Rev. B

c. Non-operating

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

The drive subjected to non-repetitive shock not exceeding 50 Gs at a maximum duration of 11 msec (half
sinewave) will not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or
Z axis.

The drive subjected to non-repetitive shock not exceeding 140 Gs at a maximum of 2 msec (half sinewave)
will not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z axis.

d. Packaged

The drive as packaged in a single or multiple drive pack of gross weight 20 pounds (8.95 kg) or less by
Seagate for general freight shi pment will withstand a drop te st from 48 inc hes (1,070 mm) against a con­crete floor or equivalent.

6.4.4.2 Vibration

a. Operating (normal)

The drive as installed for normal operation will operate error free while subjected to continuous vibration not
exceeding:

5–350 Hz @ 0.5 G

Vibration may be applied on the X, Y, or Z axis.

b. Operating (abnormal)

Equipment as installed for normal operation will not incur physical damage while subjected to periodic vibra­tion not exceeding:

15 minutes of duration at major resonant frequency
5–350 Hz @ 0.75 G

Vibration occurring at these levels may degrade operating performance during the abnormal vibration
period. Specified operating pe rforma nce wil l cont inue when normal operating vibration levels are resumed.
This assumes system recovery routines are available. Abnormal vibration may be applied o n the X, Y or Z
axis.

c. Non-operating

The limits of non-operating vibration a pply to all conditions of handling and transpor tation. This includes
both isolated drives and integrated drives.

The drive will not incur physical damage or degraded perfo rmance as a result of continuous vibration not
exceeding:

5–22 Hz @ 0.040 in. (1.02 mm) displacement
22–400 Hz @ 2.00 Gs

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.

6.5 Electromagnetic susceptibility

As a component part, t he drive is not required to meet any s usceptibility performance req uirements. It is the
responsibility of the system integrator to perform tests required to ensure that equipment operating in the same
system as the drive does not adversely affect the performance of the drive. See paragraph 6.2, “DC power
requirements.”

Cheeta h 4LP FC Product Man ual, Rev. B 21

6.6 Mechanical specifications

The following nominal dimensions are exclusive of the decorative front panel accessory. Refer to Figure 4 for
detailed mounting configuration dimensions for the drive. Refer to Figure 12 for detailed FC-AL SCA connector
dimensions. A minimum clearance of 0.050 in. (1.27 mm) must be maintained from the PWA side of the drive.

Height 1.00 in 25.4 mm
Width 4.00 in 101.6 mm
Depth 5.75 in 146.05 mm
Weight 1.3 lb 0.588 kilograms

N

[1]

R

K

J

[4]

P

F

D

B

[2]

A

[3]

C

M

.01

5.750

4.000

1.000

0.625

4.000

0.250

2.375

3.750

2.370

1.750

0.181

0.275

0.190

0.049

1.000

4.000

L

±
±

+
–

±
±
±
±
±
±
±
±
±
±

max

±
±

0.010

0.010

0.026

0.010

0.020

0.005

0.005

0.010

0.010

0.010

0.020

0.015

0.015

0.010

0.010

0.010

MillimetersInches

146.05

101.60

25.40

15.87

101.60

6.35

60.32

95.25

60.20

44.45

4.32

7.00

4.83

1.25

25.40

101.60

±

.25

±

.25

±

.38

±

.50

±

.13

±

.13

±

.25

±

.25

±

.25

±

.50

±

.38

±

.38

±

.25

max

±

.25

±

.25

G

E

[5]

H

S

Notes:

Mounting holes three on each side, 6-32 UNC.

[1]

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.

[2]

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

[3]

past the “A” dimension by 0.040 in. (1.02 mm).
Decorative front panel.

[4]

Connector is centered on module ±0.020 in.

[5]

(.508 mm).

A
B
C

D
E
F
G
H
J
K
L
M
N
P
R
S

Figure 4. Mounting conf iguration dimensions

Cheeta h 4LP FC Product Man ual, Rev. B 23

7.0 Defect and error management

The drive, as delivered, complies with this produc t manual . The read error rates and specified storage ca paci­ties are not dependent upon use of defect management routines by the host (initiator).

Defect and error management in the S CSI protocol involves the drive internal defect/error manage ment and
FC-AL system error considerations (errors in communications between the initiator and the drive). Tools for use
in designing a defect/error management plan are briefly outlined in this section. References to other sections
are provided when necessary.

7.1 Drive internal defects/errors

Identified defects are recorded on the drive defects list tracks (referred to as the primar y or ETF defect list).
These known defects are reallocated during the initial drive format operation at the fact ory. See the Format Unit
command in the
to recover data from additional flaws if they occur.

Fibre Channel Interface Manual

(part numbe r 77767496). Dat a correction by ECC is applied

Details of the SCSI commands suppor ted by the drive are described in the
Also, more information on the drive Error Recovery philosophy is presented in the

Manual

.

Fibre Channel Interface Manual

.

Fibre Channel Interface

Cheeta h 4LP FC Product Man ual, Rev. B 25

8.0 Installation

Cheetah 4LP FC disc drive installation is a plug-and-play process. There are no jumpers, switches, or termina­tors on the drive which need to be set. Simply plug the drive into the host’s 40-pin Fibre Channel backpanel
connector (FC-SCA)
nector.

The FC-AL interface is used to select drive ID and all option configurations for devices on the loop.
If multiple devices are on the same FC-AL and physical addresses are used, set the device selection IDs (SEL

IDs) on the backpanel so that no two devices have the same selection ID. This is called the hard assigned arbi­trated loop physical address (AL_PA). There are 125 AL_PA s available (see Table 18). If you set the AL_PA on
the backpanel to any value other than 0, the device plugged into the backpanel’s SCA connector inherits this
AL_PA. In the event you don’t successfully assign unique hard addresses (and therefore have duplicate selec­tion IDs assigned to two or more devices), the FC-AL generates a messag e indicating this condition. If you set
the AL_PA on the backpanel to a value of 0, the system issues a unique soft-assigned physical address auto­matical ly.

Loop initialization is the process used to verify or obtain an a ddress. The loop initialization process is per­formed when power is applied to the drive, when a device is added or removed from the Fibre Channel loop, or
when a device times out attempting to win arbitration.

• Set all option selections in the connector prior to applying power to the drive. If you change options after

applying power to the drive, recycle the drive power to activate the new settings.

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

512-byte logical blocks. You need to reformat the drive only if you want to select a different logical block size
or if you select a different spare logical block allocation scheme.

—no cables are required. Refer to Section 9.5 for additional information about this con-

8.1 Drive ID/option selection

All drive options are made through the interface connector (J1). Table 15 provides the pin descr iptions for the
40-pin Fibre Channel single connector (J1).

8.2 LED connections

A connector, J6, is provided on the printed circuit board (PCB) to provide port bypass, drive active, and drive
fault LED connections (see Figure 6). Refer to Sections 9.5.7, 9.5.8, and 9.5.9 for descriptions of LED func­tions.

J6

J1

Figure 5. Physical interface

26 Cheetah 4LP FC Product Manual, Rev. B

Drive

Front

Pin 1

J6

Reserved

Port A Bypass LED [1]
Port B Bypass LED [1]
Fault LED [1]
Reserved
Active LED [2]
+5V
Active LED [1]
Ground [3]

[1] The drive has a 2.2K ohm resistor in series with this LE D dri ver. Tie the minus side of an

external high-efficiency LED (i.e., 2ma) to this pin. Connect the plus side of the LED to
+5V.

[2] An ex ternal current-limiting resistor is required when connecting an LED to this pin. The

minus side of the resistor/LED combination is connected to this pin. Connect the plus side
to +5V. This p in is co nnecte d in parallel with th e signa l of the s am e nam e in the i nterface
connector (J1). The total current through both connectors is specified in Section 9.6 on
page 47.

[3] Jumper storage location (across pins 2 and 4).

Figure 6. LED indicator connector

8.2.1 J6 connector requirements

Recommended mating connector part number: Berg receptacle, 6-position, Berg par t number 690-006.

8.3 Drive orientation

The drive may be mounted in any orientation. All drive performance characteri zations, however, have bee n
done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, which are the two pre­ferred mounting orientations.

8.4 Cooling

Cabinet cooling must be designed by the customer so that the ambient temp erature immedi ately surrounding
the drive will not exceed temperature cond itions 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, “Temperature.”

Cheeta h 4LP FC Product Man ual, Rev. B 27

8.4.1 Air flow

The rack, cabinet, or drawer environment for the drive must provide cooling of the electronics and head and
disc assembly (HDA). You should conf irm that a dequate cooling is provided u sing the temperature m easure­ment guidelines described below.

The drive should be orient ed, or air flow directed, so that the least amount of air-flow resistance is created
while providing air flow to t he electr onics and H DA. Also, the shor test po ssible path b etween the a ir inlet an d
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.

Possible air-flow patterns are shown in Figure 7. The air-flow patterns are created by one or more fans, either
forcing or drawing air as shown in th e illustrations. Other ai r-flow patter ns are ac ceptable as long as t he tem­perature measurement guidelines are met.

Above unit

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

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

Under unit

Above unit

Under unit

Figure 7. Air flow

To confirm that the required cooling for the electronics and HDA is provided, place the drive in its final mechan­ical configuration, perform random write/read ope rations and, after the temperatures stabilize, measure the
case temperature of the components listed below. The typical ambient air temperature associated with the list
is 25°C, resulting in a MTBF of 1,000,000 hours.

28 Cheetah 4LP FC Product Manual, Rev. B

PCB and HDA temperatures

MTBF
1,000,000 hours at
30°C case temperature

Card Component Reference

HDA Figure 9 45
GAAJ OP Amp 1 48
GAAJ Serv o Control 2 50
GAAJ Motor Control 3 52
GAAJ Transceiver 4 56

(°C)

To obtain the m aximum temperature for each of the reference components l isted, add 20°C to the 1,00 0,000
hour MTBF case temperatures. The maximum allowable HDA case temperature is 60°C (see Figure 9). Opera­tion of the drive at the maximum case temperature is intended for short time periods only. Continuous opera­tion at the elevat ed temperatures will reduce product reliability. The maximum allowable HD A case temperature
to meet the 1,000,000 hour MTBF is 45°C.

The air-flow pattern with which the temperature guidelines above were generated is shown in Figure 7. Local
average air v elocities were 0.92 m/sec (180 lfpm) and inlet air temperature to the drive was 25°C (77°F), plus a
5°C temperature rise in the test enclosure (30°C ambient local to the drive).

1

3

4

Figure 8. PCB temperature measurem ent l ocations

HDA Temp.

Check Point

.5"

Figure 9. HDA case temper ature measurement location

2

Cheeta h 4LP FC Product Man ual, Rev. B 29

8.5 Drive mounting

Mount the drive using the bottom or side mounting holes. If you mount the drive using the bottom holes, ensure
that you do not physically distort the drive by attempting to mount it on a stiff, non-flat surface.

The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm). The following equation and paragraph define
the allowable mounting surface stiffness:

k * x = F <

15 lb = 67N

where k is the mounting surface stiffness (units in lb/in or N/mm) and x is the out-of-plane distor tion (units in
inches or milli meters). The out-of-plane distor tion (x) i s determi ned by defining a plane with three of the four
mounting points fixed and evaluating the out-of-plane defection of the fourth mounting point when a known
force (F) is applied to the fourth point.

8.6 Grounding

Signal ground (PCB) and HDA ground are connected together in the drive and cannot be separated by the
user. Maximizing the conductive contact area between HDA ground and system ground may reduce radiated
emissions. A bracket shield with tapped holes is available to system integrators. This shield makes it easier to
attach a braid or similar high-frequency grounding device. If you do not want the system chassis to be con­nected to the HDA/PCB ground, you must provide a nonconductive (electrically isolating) method of mounting
the drive in the host equipment ; however, this m ay increase radiated emissions and is the system designer’s
responsibility.

Cheeta h 4LP FC Product Man ual, Rev. B 31

9.0 Interface requirements

This section par tially descri bes the interface requirement s as impleme nted on ST345 01FC drives. Additional
information is provided in the

Fibre Channel Interface Manual

9.1 FC-AL features

This section lists the Fibre Channel-specific features supported by ST34501FC drives.

9.1.1 Fibre Channel link service frames

Table 2 lists the link services supported by ST34501FC drives.

Table 2: Link services supported

Type of frame Link service

Basic link service frames Abort Sequence (ABTS)
Basic link service reply f rames Basic_Accept (BA_ACC)

Basic_Reject (BA_RJT)

Extended link service frames N_Port Login (PLOGI)

Logout (LOGO)
Process Login (PRLI)
Process Logout (PRLO)
Read Link Status (RLS)
Port Discovery (PDISC)
Address Discovery (ADISC)
Third-party Process Logout (TRPLO)

Extended link service repl y fr ames Accept (ACC)

Link Service Reject (LS_RJT)

(part number 77767496).

9.1.2 Fibre Channel task management functions

Table 3 lists the Fibre Chan nel SCS I Fibre C hannel Protocol (F C S CS I FC P) task management functions sup­ported.

Table 3: Fibre Channel SCSI FCP task management functions

T ask nam e Supported

Terminate task No
Clear ACA Yes
Target reset Yes
Clear task set Yes
Abort task set Yes

9.1.3 Fibre Channel task management respo nse s

Table 4 lists the FC SCSI FCP response codes returned for task management functions supported.

T able 4: FC SCSI FCP response codes

Function name Response code

Function complet e 00
Function not supported 04
Function reject 05

9.1.4 Fibre Channel port login

Table 5 identifies the required content of the N_Port Login (PLOGI) payload from an initiator.

32 Cheetah 4LP FC Product Manual, Rev. B

Table 5: N_Port login (PLOGI) payload

Bytes

0-15 03 00 00 00 09 09 BB BB CF XX FS FS XX XX XX XX Common
16-31 XX XX XX XX PN PN PN PN PN PN PN PN NN NN NN NN
32-35 NN NN NN NN
36-47 XX XX XX XX XX XX XX XX XX XX XX XX Class 1
48-51 XX XX XX XX
52-63 XX XX XX XX XX XX XX XX XX XX XX XX Class 2
64-67 XX XX XX XX
68-79 SO SO IC IC XX XX FS FS XX CS XX XX Class 3
80-83 OS OS XX XX
84-95 XX XX XX XX XX XX XX XX XX XX XX XX Reserved
96-99 XX XX XX XX
100-111 XX XX XX XX XX XX XX XX XX XX XX XX Vend or
112-115 XX XX XX XX Version

X Indicates a four bit (hex) field is not check ed.
x Indicates a single bit is not checked.
BB BB-Credi t. This field is not checked. The FC-AL drive uses BB-Credit of zero.
CF Common features. Thi s binary field selects the common features requested by the initi ator login.

MSB Continuously increasing offset

Random relative offset
Valid version level
N_Port/F_Por t
Alternate credit model
Other bits reserved

FS Receive buffer field size. The FS field in the common and Class 3 parameters is checked for the range 128< FS <

2112 and a multipl e of f our by tes . F or mul tip le fr ame sequences , all fram es but the last frame of t he seque nce must
be this size . Only the receive buff er field size in the Clas s 3 parameters is used.

PN Port name (initiator’s)—saved with the login par am eters. If a change of the port name/AL_PA address association

is detected during a Port DISCove ry, an implicit logout occurs and a LS_RJT is returned to the initiator.
NN Node name. The node name is not che cked or saved by the driv e.
SO Service options Class 3 only

MSB Class valid

Intermix
Stacked connection required
Sequential delivery
Other bits reserved

IC Initia to r c ontrol

MSB XID reassign

Proc Assc
ACK_0

ACK_N
CS Concurrent sequences Must be a value greater than 0.
OS Open sequences per exchange M ust be a value gr eater than 0.

Must = 1
Not checked. Port Login Accept will return a 0—not supported.
x
Must = 0, N_Port
Must = 1
XXX

Must = 1
x
xx
x
xxx

xx
10 or 11 causes the login to be rejected. Other values are accepted.
xx
xx

Cheeta h 4LP FC Product Man ual, Rev. B 33

9.1.5 Fibre Channel port login accept

Table 6 identifies the N_Port Login payload values.

T able 6: N_Port Login (ACC) payload

Bytes

0-15 02 00 00 00 09 09 00 00 88 00 FS FS 00 FF 00 01 Common
16-31 000001F410PP002037UIUIUI10000020
32-35 37 UI UI UI
36-47 000000000000000000000000Class 1
48-51 00 00 00 00
52-63 000000000000000000000000Class 2
64-67 00 00 00 00
68-79 800000000000FSFS00FF 0000Class 3
80-83 00 01 00 00
84-95 000000000000000000000000Reserved
96-99 00 00 00 00
100-

111
112-

115

00 00 00 00 Version

00 00 00 00 00 00 00 00 00 00 00 00 V endor -

FS Receive buffer field size. The drive returns a receive buffer size that is the largest integer multiple of 32 bytes and

less than or equ al to t he lesser of the N_Port login Cla ss 3 recei ve b uf f er of 512, in the Common an d Class 3 fiel ds
of the Accept payload.

UI Unique identifier . Thi s 24-bit field is uniquely assigned to the drive. This same UI appears i n the Port Name and

Node Name fields.

PP Port identifier field.

01 P_LOGI received on Port A.
02 P_LOGI received on Port B.

9.1.6 Fibre Channel Process Login (PRLI)

Table 7 lists ST34501FC process login payload data.

Table 7: Process Login (PLRI) payload

Bytes

0-15 20 10 00 14 08 00 20 00 XX XX XX XX XX XX XX XX
16-1900000022

XX Indicates fields that are not used.

9.1.7 Fibre Channel Process Accept (ACC)

Table 8 lists ST34501FC process login accept payload data.

Table 8: Process Login Accept (ACC) payload

Bytes

0-15 02 10 00 14 08 00 21 00 00 00 00 00 00 00 00 00
16-31 00000012

34 Cheetah 4LP FC Product Manual, Rev. B

9.1.8 Fibre Ch annel Arbitrated Loop optio ns

Table 9 lists the FC-AL options suppor ted by ST34501FC drives.

T able 9: FC-AL options supported

Option Supported

OPEN Half Duplex Sent to open another device.

Accepted from another device.
OPEN Full Duplex Accepted from another device.
Private Loop Yes
Public Loop No
Old Port State No
Loop Position Yes
Loop Position Report Yes

9.2 Dual port support

ST34501FC drives have two ports for connection to two independent loops. Both loops may be active, but only
one of these ports may be receiving or originating transfers at any one time.

Do not connect both ports to the same loop.

9.3 SCSI commands supported

Table 10 lists the SCSI commands that ST34501FC drives support.

Table 10: Supported commands

Command code Supported Command name

00h Y Test unit ready
01h Y Rezero unit
03h Y Request sense

Y Extended sense
Y Field pointe r bytes

Y Actual retry count bytes
04h Y Format unit [1]
07h Y Reassign blocks
08h Y Read
0Ah Y Write
0Bh Y Seek
12h Y Inquiry

Y Vital product data page

Y Unit serial numbe r page

Y Implemented operating def. page

Y Firmware numbers page

Y Date code page

Y Jumper setti ngs page
15h Y Mode select (same pages as Mode Sense command shown bel ow)
16h N Reserve [3]
17h N Release [3]
18h N Copy

Cheeta h 4LP FC Product Man ual, Rev. B 35

Table 10: Supported commands

Command code

1Ah Y Mode sense

1Bh Y Start unit/stop unit
1Ch Y Receive di agnostic results

1Dh Y Send diagnostics page

25h Y Read capacity
28h Y Read extended

2Ah Y Write extended

2Bh Y Seek extended
2Eh Y Write and verify

2Fh Y Verify

30h N Search data high
31h N Search data equal
32h N Search data low
33h N Set limits
34h N Prefetch
35h Y Synchronize cache

Supported

(continued)

(continued)

Command name

Y Unit attention page (00h)
Y Error recov ery page (01h)
Y Disconnect/reconnect control (page 02h)
Y Format page ( 03h)
Y Rigid disc drive geometry page (04h)
Y Verify error recovery page (07h)
Y Caching parameters page (08h)
Y Control mode page (0Ah)
Y Notch and partition page (0C) (me dia zones)
Y Po w er control page (1Ah)
Y Informati on exceptions control page (1Ch)

Y Supported diagnostics pages
Y Translate page

Y Supported diagnostics pages
Y Translate page

Y Disable page out
Y Force unit access
N Relative address

Y Disable page out
Y Force unit access
N Relative address

Y Disable page out
Y Byte check
N Relative address

Y Disable page out
Y Byte check
N Relative address

36 Cheetah 4LP FC Product Manual, Rev. B

Table 10: Supported commands

Command code

36h N Lock-unlock-cache
37h Y Read defe ct dat a
39h N Compare
3Ah N Copy and verify
3Bh Y Write buffer

3Ch Y Read buffer

3Eh Y Read long
3Fh Y Write long
40h N Change definition
41h N Write same
42-4Bh N Not used
4Ch Y Log Select
4Dh Y Log Sense
4E-4Fh N Note used
50h N XD Write
51h N XP Write
52h N XD Read
53-54h N Not used
55h Y Mode Select ( 10) [4]
56h Y Reserved (10)

57h Y Released (10)
58-59h N Not used
5Ah Y Mode Sense (10) [4]
5B-5Fh N Not used
60-7Fh N Not used
80h N XD Write Extended
81h N Rebuild
82-8Fh N Not Used
C0-DFh N Not used
EO-FFh N Not used

Supported

(continued)

(continued)

Command name

Y Write combined header and data mode (0)

Y Write data mode (2)

N Downl oad m icrocode mode (4)

Y Download microcode and save modes (5)

N Downl oad m icrocode with offsets mode (6)

Y Download microcode with offsets and save mode (7)

Y Firmware download option [ 2]

Y Read combined header and data mode (0)

Y Read data mode (2)

Y Read descriptor mode (3)

Y 3rd party reserve

N Extend reservation

Cheeta h 4LP FC Product Man ual, Rev. B 37

[1] Cheetah 4LP FC drives can form at to any multiple of 4 bytes per logical block in the range 180 to 736

bytes and any multiple of 32 bytes per logical block in the range 768 to 4,096 bytes.

[2] Warning. Power loss during flash programming can result i n fir m ware c orruption. This usually makes the

drive inoperable.

[3] The 6-byte Reserve and Release comm ands are not suppor ted because they do not s upport the third-

party address space required for Fibre Channel.

[4] Reference Mode Sense command 1Ah for mode pages suppor t ed.

9.3.1 Inquiry data

Table 11 lists the Inquir y comma nd data that the dr ive should return to t he initiator per the forma t given in the

Fibre Channel Interface Manual

.

Table 11:

Bytes Data (hex)

0-15 00 00 ** 22 8B 00 PP 0A 53 45 41 47 41 54 45 20 Vendor ID
16-31 [535433343530314643]20202020202020Product ID
32-47 R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00
48-63 00000000000000000000000000000000
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* 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
144-147 D# D# D# D#

* Copyright year (changes with actual year).
** 02 = SCSI-2 implemented with some SCSI-3 feat ures (default ).
PP 20 = Inquiry data for an Inquiry command receiv ed on Port A.

30 = Inquiry data for an Inquiry command received on Port B.
R# Four ASCII digits representing the last four digits of the product firmware relea se num ber.
S# Eight ASCII digits representing the eight digi ts of the product serial num ber.
D# Reser ved 00 00 00 00.
[ ] Bytes 16 through 24 r eflect drive model.

Cheetah 4LP FC

inquiry data

9.3.2 Mode Sense data

The Mode Sense c ommand provides a way for the drive to report i ts o perating param eters to the initiator. The
drive maintains four sets of mode parameters:

1. Default values

Default values are hard-coded in the drive firmware stored in flash E-PROM (nonvolatile memory) on the
drive’s PCB. These d efault values can be changed only by downloading a complete set of new firmware
into the flash E-PROM. An initiator can request and recei ve from the drive a list of default values and use
those in a Mode Select com mand to set up new current and saved values, where the values are change­able.

2. Saved values

Saved values are stored on the drive’s media using a Mode Select command. Only parameter values that
are allowed to be changed can be changed by this method. Parameters in the saved values list that are not
changeable by the Mode Select command get their values from default val ues storage.

When power is applied to the drive, it t akes saved values from the media and stores them as current values
in volatile memory. It is not possible to change the current values (or the saved values) with a Mode Select
command before the drive achieves operating speed and is “ready.” An attempt to do so results in a “Check
Condition” status.

38 Cheetah 4LP FC Product Manual, Rev. B

On drives requiring unique saved values, the required unique saved values are stored into the saved val­ues storage location on the me dia pr ior t o shi pping the drive. Some dr ives may have unique firmware wit h
unique default values also.

On standard OEM drives, the saved values are taken from the default values list and stored into the saved
values storage location on the media prior to shipping.

3. Current values Current values are volatile values being used by the drive to control its operation. A Mode Select command

can be used to chan ge the values iden tified as change able values. Originally, current values are installed
from saved or default values after a power on reset, hard reset, or Bus Device Reset message.

4. Changeable values Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the current values

and saved values can be changed by a Mode Select command. A one (1) indicates the value can be
changed. A zero (0) indicates the value is not changeable. For example, in Table 12, refer to Mode page
81, in the row entitled “CHG.” Th ese are hex numbers representing the chang eable values for Mode page

81. Note in columns 5 and 6 (bytes 04 and 05), there is 00h which indicates that in bytes 04 and 05 none of
the bits are changea ble. Note also that bytes 06, 07, 09 , 10, and 11 are not chan geable, because those
fields are all zeros. In byte 02, hex value FF equates to the binary pattern 11111111. If there is a zero in
any bit position in the field, it means that bit is not changeable. Since all of the bits in byte 02 are one’s, all
of these bits are changeable.

The changeable values list can only be changed by downloading new firmware into the flash E-PROM.

Note. Because there are often 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.

The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com­mand pages for SCSI implementation (see the

Definitions:
DEF = Default value. Standard OEM drives are shipped configured this way.
CHG = Changeable bits; indicates if default value is changeable.

Fibre Channel Interface Manual

).

Cheeta h 4LP FC Product Man ual, Rev. B 39

Table 12: Mode Sense data default values

ST34501FC
Bytes

Mode
Sense
Header

DEF

CHG 81 0A FF FF 00 00 00 00 FF 00 00 00

DEF 82 0E 80 80 00 00 00 00 00 00 02 84 00 00 00 0 0

CHG 82 0E FF FF 00 00 00 00 00 00 FF FF 00 00 00 00

DEF 83 16 00 60 00 6C 00 00 00 00 00 A9 02 00 00 01 00 1E 00 32 40 00 00 00

CHG

DEF 84 16 00 19 B0 08 00 00 00 00 00 00 00 00 00 0 0 00 00 00 00 27 31 00 00

CHG

DEF 87 0A 00 5B 40 00 00 00 00 00 FF FF

CHG 87 0A 0F FF 00 00 00 00 00 00 00 00

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

A7 00 10 08
00 87 9B A0 00 00 02 00

<------------- --------- -------- --------- -- ------- M o de se n s e p a ge s da ta -- --------- -- --------- -------- --------- -------- ->

81 0A CC 5B 40 00 00 00 37 00 FF FF

83 16 00 00 FF FF 00 00 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 00 00

84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DEF 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00

CHG 88 12 B5 00 00 00 FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00

DEF 8A 0A 02 00 00 00 00 00 00 00 00 00

CHG 8A 0A 03 F0 08 00 00 00 00 00 00 00

DEF 99 06 00 00 00 00 00 00

CHG 99 06 00 3F 00 00 00 00

DEF 9A 0A 00 00 00 00 00 01 00 00 00 04

CHG 9A 0A 00 03 00 00 00 00 00 00 00 00

DEF 9C 0A 00 04 00 00 00 00 00 00 00 01

CHG 9C 0A 8C 0F 00 00 00 00 00 00 00 00

DEF 80 02 00 00

CHG 80 02 37 42

<---Read capacit y data --->

00 87 9B 9F 00 00 02 00

40 Cheetah 4LP FC Product Manual, Rev. B

9.4 Miscellaneous operating features and conditions

Table 13 lists various features and conditions. A “Y” in the support column indicates the feature or condition is
supported . An “N” in the support column indicate s the feature or condition is not supported.

Table 13: Miscellaneous features

Supported Feature or condition

Y FC-AL selective reset

Y Automatic contingent alleg iance
N Asynchronous event notification
Y Synchronized (locked) spindle operati on
Y Segmented caching
N Zero latency read
Y Queue tagging ( up to 64 que tags supported)
Y Deferred err or handling
Y Paramet er rounding (contro ll ed by round bit in Mode Select page 0)
Y Reporting actual retry count in Extended Sense bytes 15, 16, and 17
N Adaptive caching
Y SMP = 1 in Mode Select command needed to sa ve RPL and rotational offset bytes

Table 14: Miscellaneous status

Supported Status

Y Good
Y Check condition
Y Condition met/good
YBusy
Y Intermediate/good
Y Intermediate/condition met/good
Y Reservation conflict
Y Task set full
Y ACA active
Y ACA active, faulted initiator

Cheeta h 4LP FC Product Man ual, Rev. B 41

9.5 FC-AL physical interface

Figure 10 shows the location of the J1 Fibre Channel single connection attachment (FC-SCA) and the J6 con­nector. Figure 12 provides the dimensions of the FC-SCA. Fi gure 13 provides the dimen sions of the J6 con­nector.

Details of the physical, electrical, and logical characteristics are provided within this section. The operational
aspects of Seagate’s Fibre Channel drives are provided in the

Fibre Channel Interface Manual

.

J6

J1

Figure 10. Physical interface

9.5.1 Physical characteristics

This section defines physical interface connector and its functions on a loop.

9.5.1.1 Physical description

FIbre Channel drives may be connected in a loop together or with other compatible FC-AL devices. A maxi­mum of 127 devices may have addresses; however, one o f the addresses is reserved for a fabric port switch
device. This means 126 addresses are available for FC-AL devices. More FC-AL compatible devices may
physically reside on the loop, but they will not be functional because they would not be able to obt ain valid
addresses.

Port bypass circuits (PBCs) allow devices to be inserted i nto unpop ulated locations or rem oved from the loop
with loop operation recovery after a brief interruption. These P BCs are located external to the FC-AL device.
Figure 11 shows the relationship between the PBC and FC-AL device.

Port Bypass

Circuit

From Previous

Port Bypass

Circuit N–1

Drive

MUX

To Next

Drive

Port Bypass

Circuit N+1

Drive N–1

Figure 11. Port bypass circuit physical interconnect

SerialInSerial

Select

Drive N

Out

Drive N+1

42 Cheetah 4LP FC Product Manual, Rev. B

(

)

(

)

9.5.2 Connector requirements

Recommended mating SCA part number:

Part descri ption Positions Part number Features

AMP Vertical (SCA sequence) 40 787317-1

With polarization

The FC-AL SCA device connector is illustrated in Figure 12. The J6 connector is illustrated in Figure 13.

1.618 ± .003

(41.1 ± 0.08)

1.447 ± .044

.64

(16.24)

(17.05)

(36.75 ± 1.12)

1.28

(32.47)

.025

(0.635)
.05 typ

(1.27)

.67

Mating End

1.34

34.11

Housing

Pin 40

Pin 20

.26

(6.72)

.20

(5.08)

2 places

.276 ± .004

(7.00 ± 0.10)

.12

(2.97)

2 places

max

.388 ± .002

(9.85 ± 0.05)

.09

(2.25)

2 places

Retention Leg

2 places

Pin 21

Pin 1

.01

(0.32)

2 places

.02 typ

(0.5)

Figure 12. FC-AL SCA device connect or dimensions

.787

(19.99 mm)

.079 (2 mm)

J6

.079

(2 mm)

.708

17.983 mm

Figure 13. J6 connector dimensions

9.5.3 Electrical description

Fibre Channel drives use the FC-SCA connector for:

• DC power

• FC-AL interface

• Drive select (device identification)

• Option selection
This 40-pin connector is designed to plug directly into a backpanel. External cables are not required.

Cheeta h 4LP FC Product Man ual, Rev. B 43

9.5.4 Pin descriptions

This section provides a pin-out of the FC-SCA and a description of the functions provided by the pins.

Table 15: FC-SCA pin descriptions

Pin Signal name Signal type Pin Signal name Sig nal type

1* -EN bypass port A TTL output 21 12 Volts charge
2* 12 Volts 22 Ground
3* 12 Volts 23 Ground
4* 12 Volts 24* +Port A_in Diff. PECL input pair
5* -Par allel E S I TTL output 25* -Port A_ in
6* Ground (-DRV present ) 26 Ground
7* Active LED out Open collector out 27* +Port B_in Diff. PECL input pair
8* Reserved 28* -Port B_in
9* Start_1 TTL input 29 Ground
10* Start_2 TTL input 30* +Port A_out Diff PECL output pai r
11* -EN bypass port B TTL output 31* -Port A_out
12* SEL_6 TTL input 32 Ground
13* SEL_5 TTL input 33* +Port B_out Diff PECL output pair
14* SEL_4 TTL input 34* -Port B_out
15* SEL_3 TTL input 35 Ground
16* Fault LED out Open collector out 36 SEL_2 TTL input
17* Reserved NC 37 SEL_1 TTL input
18* Reserved NC 38 SEL_0 TTL input
19* 5 Volts 39 Reserved NC
20* 5 Volts 40 5 Volts charge

*Short pins in mating backpanel connector.

9.5.5 FC-AL transmitters and receivers

A typical FC-AL differential copper transmitter and receiver pair is shown in Figure 14. The receiver is required
to provide the AC coupling to eliminate ground shift noise.

75

75

75

75

Differential

Transfer Medium

TX

Transmitter

TY

Figure 14. FC-AL transmitters and receivers

.001µf

150

.001µf

RX

Receiver

RY

9.5.6 Power

Power is supplied through the FC-S CA with support for +5 volts and +12 volts. All of the voltage pins in the
drive connector are the same length.

Four 12 v olt pi ns prov ide +12 vol t power to the drive. The current return fo r t he +12 v olt power supply is through
the common ground pins. The supp ly current and return current must be distributed as evenly as poss ible
among the pins. The maximum current typically occurs while the drive motor is starting.

Three 5 volt pins provide logic power to the drive. The current return for the +5 volt power supply is through the
common ground pins. The supply and return current must be distributed as evenly as possible among the volt­age and ground pins.

44 Cheetah 4LP FC Product Manual, Rev. B

The mating connector pins use shorter contacts to achieve power surge reductions and to aid in “hot plugging”
the drives. There are longer voltage contacts in the connector to enable the drive filter capacitors to charge.
Current to the drive through the long charge pins is limited by the system in which the drive operates. Three of
the +12 volt pins are shorter to allow capacitive pre-charging through the longer +12 volt charge pin. Two of the
+5 volt pins are shorter to allow capacitive precharging through the longer +5 volt charge pin.

9.5.7 Fault LED Out

The Fault LED Out signal is driven by the drive when:

• the drive detects failure of both ports

• the drive detects an internal failure

• the drive receives the appropriate fault LED command from the host
The Fault LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper

+5 volt supply through an appropriate c urrent-limiting resistor. T he LED and the current-limiting resistor are
external to the drive.

9.5.8 Active LED Out

The Active LED Out signal is driven by the drive as indicated in Table 16.

Table 16: Active LED Out conditions

Normal command activity LED status

Spun down and no activity Off
Spun down and activity (command ex ecuting) On
Spun up and no activity On
Spun up and activity (comm and executing) Off
Spinning up or down Blinks steadily
Format in progre ss, each cylinder change Toggles on/off

The Active LED Out signal is designed to pull down t he cathode of an LED. The anode is attached to the proper
+5 volt supply through an appropriate current limiting resistor. The LED and the current limiting resistor are
external to the drive.

9.5.9 – Enable Bypass Signal Port A - Port B

The – Enable Bypass Port A (– EN BYP Po rt A ) and – Enable Bypass Port B (– EN BYP Port B) control the
port bypass circuits (PBC) located external to the disc drive. The PBC allows a loop to remain functional in the
event of a drive failure or removal. When these signals are active, low, the PBC bypasses the drive on th e
associated por t. When an Enable Bypass s ignal is active, the corresponding Port Bypass LED s ignal in con­nector J20 is driven low by the disc drive. A pull down resistor, 1K, located with the PBC on the system back
panel should be used to insure the bypass is enabled if the disc drive is not installed.

The Enable Bypass signal is active under failing conditions within the drive, on detection of the Loop Port
Bypass primitive sequence, or on removal of the drive. In the bypass state the drive continues to receive on the
inbound fibre. Enable Bypass may be deactivated by detection of a Loop Port Enable primitive sequence if the
drive has completed self-test and a hardware failure is not present.

Failure modes detected by the disc drive that will enable bypass include:

• Transmitter/receiver wrap test failure

• Loss of receive clock

• Loss of transmission clock

• Drive interface hardware error

Cheeta h 4LP FC Product Man ual, Rev. B 45

9.5.10 Motor start con trols

The drive’s motor is star ted according to the S tart_1 and Star t_2 signals described in Table 17. The state of
these signals can be wired into the backplane socket or driven by logic on the backplane.

T able 17: Motor start control signals

Case Start_2 Star t _1 Mot o r sp i n fun c tion

1 Low Low Motor spins up at DC power on.
2 High Low Motor spins up only when SCSI Start command is receiv ed.
3 Low High Motor spins up after a delay of 12* seconds (max) times the module 8

value of the nu meric SEL ID of the drive from DC power on.

4 High High The drive will not spin up.

*This value may be reduced by drive suppliers t o reflect t he worst case time duration of peak current drains at
the 12 Volt of 5 Volt source (or both) during motor spin up. The delay should never exceed 12 seconds.

9.5.11 SEL ID lines

The SEL_6 through SEL_0 ID lines provide a binar y dec ode ass ociated wit h a physical unit for the full addres­sable logic range and beyond of the FC-AL. Refer to Table 18 for the SEL to FC-AL physical addresses (AL­PA). You can think of the SEL lines as the equivalent of a backpanel logic plug. The drive does not provide pull
up resistors on these lines. The backpanel is required to provide high and low inputs to the SE L-ID lines as
described in Section 9.6.1.

SEL setting 7F hex maps to a valid AL-PA. This value signals to the drive that physical addresses are not being
assigned through the SEL lines and that a “soft” address is being assigned using the FC-AL initialization
sequence.

Table 18 provides the AL-PA values for each SEL value. The first entr y in the table is switch SEL_ID = 00 . The
last entry is switch SEL_ID = 7D. Switch SEL_ID value 7E is AL-PA 00 which is not valid for a NL_Port and is
therefore not lincluded in the table.

46 Cheetah 4LP FC Product Manual, Rev. B

Table 18: Arbitrated loop physical address (AL_PA) values

AL_PA
(hex)

EF 00 00 A3 2B 43 4D 56 86
E8 01 01 9F 2C 44 4C 57 87
E4 02 02 9E 2D 45 4B 58 88
E2 03 03 9D 2E 46 4A 59 89
E1 04 04 9B 2F 47 49 5A 90
E0 05 05 98 30 48 47 5B 91
DC 06 06 97 31 49 46 5C 92
DA 07 07 90 32 50 45 5D 93
D9 08 08 8F 33 51 43 5E 94
D6 09 09 88 34 52 3c 5F 95
D5 0A 10 84 35 53 3A 60 96
D4 0B 11 82 36 54 39 61 97
D3 0C 12 81 37 55 36 62 98
D2 0D 13 80 38 56 35 63 99
D1 0E 14 7C 39 57 34 64 100
CE 0F 15 7A 3A 58 33 65 101
CD 10 16 79 3B 59 32 66 102
CC 11 17 76 3C 60 31 67 103
CB 12 18 75 3D 61 2E 68 104
CA 13 19 74 3E 62 2D 69 105
C9 14 20 73 3F 63 2C 6A 106
C7 15 21 72 40 64 2B 6B 107
C6 16 22 71 41 65 2A 6C 108
C5 17 23 6E 42 66 29 6D 109
C3 18 24 6D 43 67 27 6E 110
BC 19 25 6C 44 68 26 6F 111
BA 1A 26 6B 45 69 25 70 112
B9 1B 27 6A 46 70 23 71 113
B6 1C 28 69 47 71 1F 72 114
B5 1D 29 67 48 72 1E 73 115
B4 1E 30 66 49 73 1D 74 116
B3 1F 31 65 4A 74 1B 75 117
B2 20 32 63 4B 75 18 76 118
B1 21 33 5C 4C 76 17 77 119
AE 22 34 5A 4D 77 10 78 120
AD 23 35 59 4E 78 0F 79 121
AC 24 36 56 4F 79 08 7A 122
AB 25 37 55 50 80 04 7B 123
AA 26 38 54 51 81 02 7C 124
A9 27 39 53 52 82 01 7D 125
A7 28 40 52 53 83
A6 29 41 51 54 84
A5 2A 42 4E 55 85

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

Cheeta h 4LP FC Product Man ual, Rev. B 47

9.6 Signal characteristics

This section describes the electrical signal characteri stics of the input and output signal of the drive. Refer to
Table 15 on page 43 for signal type and signal name information.

9.6.1 TTL input characteristics

Table 19 provides the TTL input characteristics.

Table 19: TTL input characteristics

State Voltage Current

High 2.4 < V
Low -0.5V < V

< 5.5V 0 < IIH < ±100µA

IH

< 0.4V 0 < IOH < -3 mA

IL

9.6.2 LED driver signals

Fault and Active LED signals are located in the FC-SCA connector (J1) and through the indicator connector
(J6). Refer to Table 20 for the output characteristics of the LED drive signals.

T able 20: LED drive signal

State Current drive available Output voltage

LED off, high 0 < I
LED on, low I

< 100µA

OH

< -30 mA 0 < VOL < 0.8V

OL

9.6.3 Differential PECL output

The serial PECL output signal voltage characteristics are provided in Table 21. The outputs are not AC coupled
in order to deliver maximum signal without rise and fall time degradation. You must AC couple the receiver to
isolate potentially different DC characteristics of the outputs and the receiver.

T able 21: Differential PECL output characteristics

Description Parameter Notes

Serial output voltage swing 300 < V

< 650 mV Centered at 1.32V

out

Figure 15 provides the data output valid eye diagram relative to the bit cell time.

941 ps

Vout (mv)

800 ps

Figure 15. Transmit eye diagram

48 Cheetah 4LP FC Product Manual, Rev. B

9.6.4 Differential PECL input

The serial PECL input signal voltage characteristics are provided in Table 22.

Table 22: Differential PECL input characteristics

Description Parameter Notes

Serial input voltage swing 200 < V

< 1,300 mV AC coupled

in

Figure 16 provides the data valid eye diagram for typical and minimum requirements to recover data at the
specified interface error rate.

941 ps

Vin (mv)

659 ps
376 ps

Figu re 16. R e ceive eye diagr am

Typical
Minimum

Cheeta h 4LP FC Product Man ual, Rev. B 49

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 help you with s ystem conf licts an d ot her technical issues. If you need additional assis­tance with your Seagate
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 callers 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, dr ive specifi cati ons and jumper set­tings for Seagate’s entire product line. You can also download software for installing and analyzing your drive.

SeaNET

You can obtain technic al information about Seagate produ cts over the Internet from Seagate’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 access our technical supp ort
for u m, t y p e
can type questions or browse through previous questions and answers on the for um mess ages.

SeaBOARD

SeaBOARD is a computer bulletin board system that contains information about Seagate disc and tape drive
products and is available 24 hours daily. Set your communication s software to eight data bits, no parity, and
one stop bit (8-N-1).

Location Phone number

Australia 61-2-9756-2359
England 44-1628-478011
France 33 1-48 25 35 95
Germany 49-89-140-9331
Taiwan 886-2-719-6075
Thailand 662-531-8111
USA Disc: 405-936-1600; Tape: 405-936-1630

™

go seagate

®

®

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

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

FAX services

SeaFAX

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

Location Phone number

Australia 61-2-9756-5170
England 44-1628-894084
USA Disc: 405-936-1620; Tape: 405-936-1640

Seagate technical support FAX

You can FAX questions or comments to technical suppor t s pecialists 24 hours d aily. Responses are sent dur­ing business hours.

Location Phone number

Australia 61-2-9725-4052
England 44-1628-890660
France 33 1-46 04 42 50
Germany 49-89-1430-510 0

®

50 Cheetah 4LP FC Product Manual, Rev. B

Location Phone number

Hong Kong 852-2368 7173
Japan 81-3-5462-2979
Korea 82 -2-556-7294/ 4251
Singapore 65-488-7528
Taiwan 886-2-715-2923
USA Disc: 405-936-1685; Tape: 405-936-1683

Direct-support services

Seagate technical support

For one-on-one help, you can talk to a technical su pport specialist during local business hours. Before calling,

xxxx

note your system configuration and drive model number (ST

Location Phone number

A.M

Australia 61-2-9725-3366 (9:00
England 44-1628-894083 (10:00
France 33 1-41 86 10 86 (9:30

. to 5:00 P.M., M–F)

A.M

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

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

A.M

(9:30

. to 12:30 P.M., 2:00 P.M. to 4:00 P.M., M–F)
Hong Kong 852-2368 9918
Korea 82 -2-556-8241

A.M

Singapore 65-488-7584 (9:00

. to 12:00 P.M., 2:00 P.M. to 5:00 P.M., M–F )
Taiwan 886-2-514-2237
USA Please dial 1-800-SEAGATE or 408-456-4496 for the specific product telephone number.

A.M

(8:00

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

).

SeaTDD™ 405-936-1687

Using a telecommunications device for the deaf (TDD ), you can send qu estions or comments 24 hours daily

A.M

and exchange messages with a tec hnical support spe cialist between 8:00

P.M

7:00

. (Central time) Monday through Friday.

. to 1:15 P.M. and 2:30 P.M. to

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.

Location Phone number FAX number

Asia Pacific and Australia 65-485-3595 65-485-4980
Europe, Middle East, and Africa 31-2031-67300 31-2065-34320
Japan 81-3-5462-2904 81-3-5 462-2979
USA 1-800-468-3472 405-949-6740

Other Americas (Brazil, Canada, Mexico) 40 5-949-6706 40 5-949-6738

Manufacturer’s representatives

Brazil

MA Informatica 55-11-810-7794 55-21-253-6467

Canada

Memofix
Adtech

Mexico

Abicom Seamax SA DE CV 525-546-6965 525-546-4888

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

905-660-8738
905-812-7807

Barracuda 9LP Product Manual, Rev. A (draft-01) 51

Index

Numerics

12 volt

current profile

43

pins
3rd party reserve command
5 volt pins

43

A

Abort Sequence (ABTS) 31
abort task set function
AC coupling
AC power requirements
ACA active status
ACA active, faulted initiator status
Accept (ACC)
active LED Out signal
Actual retry count bytes command
actuator

adaptive caching
Address Discovery (ADISC)
addresses
air cleanliness
air flow

air temperature
air velocities
altitude limits

ambient temperature
ANSI documents

arbitrated loop physical address (AL_PA)
arbitration

asynchronous event notification
audible noise
automatic contingent allegiance
autowrite and read reallocation

average idle current
average rotational latency

6

assembly design

41, 45

27

direction

illustrated

pattern

non-operating

operating

fibre channel

SCSI

values, table of

27, 28

4

25

programmable

B

backpanel 42
backplane
basic link service frames
Basic_Accept (BA_ACC)
Basic_Reject (BA_RJT )

45

18

36

31

43

17

40

40

31

44

34

5

40

31

20

27

27

28

28

19

19

26

4

46

40

3

40

6

17

9

31

31

31

25

data
space

32

9

29

6

10

40

16

9

9

BB-Credit
bits per inch
bracket shield
buffer

busy status
bypass circuit
bytes per surface
bytes per track

C

cache operation 10
cache segments
Caching parameters page (08h) command
caching write data
Canadian Department of Communications
capacity

formatted

unformatted
CDB Write command (2Ah)
Change definition command
character sync
charge pins
check condition status
class B limit
class valid bit
clear ACA function
clear task set fun ction
commands supported
common features
Compare command
condition met/good status
conditions
connector

illustrated

requirements
continuously increasing offset bit
Control mode page (0Ah) command
cooling
Copy and verify command
Copy command
CRC

current
customer service
cylinders/tracks per surface

26, 27

16

13

error

protected frames

43

11

11

7

7, 9

11

36

16

44

40

3

32

31

31

34

32

36

40

40

42

42

32

35

36

34

6

16

9

D

data block size

modifing the
data buffer to/from disc media
data correction
data heads

read/write
data page out (DPO) bit

7

10

23

9

11

35

3

52 Barracuda 9LP Product Manual, Rev. A (draft-01)

data rate

internal
data transfer rate
data valid eye
Date code page command
DC power

requirements
defect and error management
deferred error handling
description
device selection IDs
devices
differential PECL input
dimensions

physical
disc rotation speed
Disconnect/reconnect control (page 02h) command

drive active LED connection
drive characteristics
drive defects list tracks
drive fault LED connection
drive ID
drive ID/option select headers
drive mounting
drive orientation
drive select
driver signals
drivers and receivers
dual port support

9

10

48

34

42

17

23

40

5

25

25

48

21

9

35

25

9

23

25

25

25

29

26

42

47

6

34

E

ECC 23
effective altitude
electrical

description of connector

signal characteristics

specifications

susceptibility
electromagnetic compatibility
electromagnetic interference (EMI)
elevated temperatures

13

EMI
EMI requirements
enable bypass

port A

port B

signal

16

state
environmental

interference

18

limits

requirements
error

detection mechanisms, FC

management

13

rates

19

42

47

17

20

3

13

28

3

44
44
44

13

13

16

23

error correction code

96-bit Reed-Solomon
Error recovery page (01h) command
ETF defect list
Extend reservation command
extended link service

frames

reply frames
Extended sense command

23

31

31

F

fans 27
fault LED out signal
FC-AL

document

interface

options supported

physical addresses

physical interface

SCA device connector, illustrated

selective reset
FCC rules and regulations
FCP

for SCSI, document

response codes

task management functions
FC-PH document
features

interface
Fibre Channel documents
Fibre Channel Interface Manual
Field pointer bytes command
firmware

corruption
Firmware download option command
Firmware numbers page command
flawed sector reallocation
form fa ctor
format
Format command execution time
Format page (03h) command
Format unit command

33

FS
function

complete, code 00

not supported, code 05

reject, code 04

25, 42

6, 40

31

6

6

25

44

4

34

45

41

40

31

4

37

34

31

31

G

Good status 40
ground

29

HDA

29

signal
ground shift noise
grounding

29

43

6

35

36

34

42

3

4

31

4

1, 4

34

36

34

6

9

35

31

Barracuda 9LP Product Manual, Rev. A (draft-01) 53

H

hard assigned arbitrated loop physical address

(AL_PA)

head and disc assembly (HDA)

case temperature measurement location
cooling
ground

heads

read/write data
high-frequency grounding device
hot plugging the drive
humidity limits

non-operating

operating

25

5, 27

28

27

29

9

29

16

18, 19

19

19

I

ID and configuration options 6
Implemented operating def. page command
implicit logout
initialization

sequence
initiator control
Inquiry command
inquiry data
installation

guide
interface

commands supported

description

error rate

errors

illustrat e d

physical

requirements
interleave

minimum
intermediate/condition met/good status
intermediate/good status
internal data rate
internal defects/errors
internal drive characteristics

32

45

45

32

34

37

25

4

25

34

41

13

13

41

41

31

6

10

40

9

23

9

34

40

J

J1 connector 25
J6 connector
Jumper settings page command
jumpers

25, 26

34

25

L

latency

average rotational
LED driver signals
Link Service Reject (LS_RJT)
link services supported
Lock-unlock-cache command

9, 10

47

31

31

35

Log select command
Log sense command
logic power
logical block address
logical block reallocation scheme
logical block size
logical segments
login parameters
Logout (LOGO)

34, 41, 44, 46

loop

disruption
initialization

loop position

FC-AL options

loop position report

FC-AL options
LS_RJT
LSI circuitry

43

16

32

6

36
36

11

6

6, 10
10
32

31

25

34
34

M

maintenance 13
maximum allowable HDA case temperature
maximum case temperature
maximum delayed motor start
maximum start curr e nt
maximum tempe ra tur e s
mean time between failure (MTBF)
mechanical specifications
media description
media error rate

recoverable
minimum sector interleave
miscellaneous feature support

Adaptive caching

Asynchronous event notification

Automatic contingent allegiance

Deferred error handling

FC-AL selective reset

Parameter rounding

Queue tagging

Reporting actual retry count

Segmented caching

SMP = 1 in Mode Select command

Synchronized (locked) spindle operation

Zero latency read
miscellaneous operating features
miscellaneous status support

ACA active

ACA active, faulted initiator

40

Busy

Check condition

Condition met/good

40

Good

Intermediate/condition met/good

Intermediate/good

Reservation conflict

Task set full

6

13

40

40

40

40

40

28

17

17

28

15

21

10

40
40

40

40

40

40

40

40

40

40

40

40

40

40

40

28

40

54 Barracuda 9LP Product Manual, Rev. A (draft-01)

miscorrected media data 13
mode page 08h
Mode select

(10) command
command

Mode sense

(10) command
command

data, table
monitoring state
Motor Control

temperature
motor star t

controls

option
mounting

configuration dimensions

holes

orientations

13, 15

MTBF

defined

11

36

34

36

34

37, 39

16
28

45

10

29

21

29

26

15

N

N_Port Login (PLOGI) 31

payload

payload values
no seek complete error (02h)
node name
noise

audible
noise immunity
Notch and partition page (0C) (media zones)

31

32
3

18

command

33

13

35

O

old port state

FC-AL options
OP Amp

temperature
OPEN Full Duplex

FC-AL options
OPEN half duplex

FC-AL options
open sequences per exchange
operating features
option configurations
option selection
options
out-of-plane distortion
overhead time

7, 34

for head switch

for one track cylinder switch

34

28

34
34

32

40

25

42

29

10

10

received on Port B
parameter rounding
pass-through state

41, 44

PBC
peak operating current
peak-to-peak measurements
PECL input
performance characteristics

detailed

general
performance highlights
physical addresses
physical interface

description
physical specifications

33

PI
pin descriptions
port bypass circuit
port bypass LED connection
Port Discovery (PDISC)
port identifier field
port login

accept
port name (initiator’s)
power

dissipation

requirements, AC

requirements, DC

sequencing
power distribution
Prefetch command
prefetch/multi-segmented cache control
preventive maintenance
primary defect list
printed circuit board (PCB)

cooling
private loop

FC-AL options
Private Loop SCSI Direct Attach
Process Accept (ACC)
Process Login (PRLI)
Process Login Accept (ACC) payload
process login payload data
Process Logout (PRLO)
product reliability

reduction in
public loop

FC-AL options
pull down resistor

48

9

10

41

43

31

33

43

18

18

26

28

33

40

16

17

18

6

45

41

17

16, 41, 44

25

31, 32

33

32

17
17

3

35

13

23

34

4

33

31, 33

33

33

31

34

44

Q

queue tagging 40

10

P

P_LOGI

received on Port A

33

R

radiated emissions 29
radio interference regulations
random relative offset bit

32

3

Barracuda 9LP Product Manual, Rev. A (draft-01) 55

RCD bit 11
Read buffer command
Read capacity command
Read command
Read defect data command
Read extended command
Read Link Status (RLS)
Read long command
read/write data heads
reallocation

of defects
Reassign blocks command
receive buffer field size
Receive diagnostic results command
receive eye

diagram
receivers
recovered error (1h)
reference

components

documents
Release command
Released (10) command
reliabilit y

and service

specifications
repair and return information
reporting actual retry count
Request sense command
reservation conflict status
Reserve command
Reserved (10) command
return information
Rezero unit command
Rigid disc drive geometry page

command
rotation speed
running disparity

6

48

43

4

6

35

9

36

35

34

35

35

31

36

9

34

32, 33

13

28

34

36

15

13

16

40
34
40

34

36

16

34

16

S

safety 3
SCA part numbers
SCSI interface

commands supported
SCSI Interface Product Manual
Search data

equal command

high command

low command
Seek command
seek error

defined

rate
Seek extended command
seek performance characteristics
seek positioning error (15h)
seek time

13

13

42

34

3

35

35

35

34

35

9

13

35

average typical
full stroke typical

single track typical
segmented caching
SEL ID

Self-Monitoring Analysis and Reporting Technology
Send diagnostics page command

service

Servo Control
Set limits command

shielding
shipping
shock limits

signal

single-unit shi p ping pack kit
SMART
SMP = 1 in Mode Select command
spare reallocation
spare sector allocation
spindle brake
standards
Start unit/stop unit command
start/stop time
status
supply current
support services
Supported diagnostics pages command
surface stiffness

switches
Synchronize cache command
synchronized spindle

25

45

lines

standard feature

, 14

6

13, 15

life

options

philosophy

tools

temperatukre

32

15

3

16

19

non-operating

operating (abnormal)

operating (normal)

packaged

characteristics

ground

LED driver

29

6, 14

3

40

allowable for non-flat surface

25

operation

9

9

9

40

6

35

15

28

35

20

19

19

20

47

47

7

40

7

25

6

35

10
43

49

35

29

35

40

T

target reset function 31
task management functions

Abor t task se t

Clear ACA

Clear task set

Target reset

termi n ate ta sk

31

31

31

31

31

31

56 Barracuda 9LP Product Manual, Rev. A (draft-01)

task management response codes 31

Function complete 00
Function not supported 05

Function reject 04
task set ful l status
technical support services
temperature

18

limits

measurement locations

regulation

test enclosure

See also

Temperature measurement locations
termi n ate task function
terminators
Test unit ready command
Third-party Process Logout (TRPLO)
track follow error (09h)
tracks per inch
Transceiver

temperature
Translate page command
transmit eye diag ram
transmitters
transporting the drive
troubleshooting
TTL input characteristics

40

3

28

cooling

25

9

28

43

49

31

31

31

49

28

28

31

34

31

13

35

47

16

47

Write extended command
Write long command
Write same command

36

36

X

XID reassign bit 32

Z

zero latency read 40
zone bit recording (ZBR)

35

6

U

UI 33
unique identifier
Unit attention page (00h) command
Unit serial number page command
unrecoverable

13

error

write error, defined
unrecovered media data

33

35

34

13

13

V

Verify command 35
Verify error recovery page (07h) command
vibration limits

(non-operating)

operating (abnormal)

operating (normal)
Vital product data page command

19

20

20

20

34

W

warranty 16

11

WCE
word sync
Write and verify command
Write buffer command
write caching enable bit
Write command
write errors

16

35

36

11

34

13

35

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

Publication Number: 83329190, Rev. B, Pr inted in USA