seagate ST150176FC Installation guide

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Barracuda 50FC Disc Drive

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ST150176FC

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Product Manual, Volume 1

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Barracuda 50FC Disc Drive

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ST150176FC

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Product Manual, Volume 1

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© 1999 Seagate Technolog y, Inc. All rights reserved
December 1999

Publication number: 83329473, Rev. C

Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Tech­nology, Inc. Barracuda, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either trademarks or
registered trademarks 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 7/27/99 L. Newman/D. Rusch 1/1, v thru viii, 1 thru 70.
B 8/9/99 L. Newman/D. Rusch 5.
C 12/14/99 L. Newman/G. Velaski Pages 14 and 47 (mode sense data).

Barracud a 50FC Pr oduct Manual, Rev. C vii

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

2.1.2 Electromagnetic compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

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

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

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

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

3.4 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.5 Unformatted and formatted capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.6 Programmable drive capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.7 Factory-installed accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.8 Factory-installed options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.9 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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

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

4.5 Cache operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0

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

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

5.0 Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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

5.1.0.1 Interface errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.1 Environmental interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.2 Write errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.3 Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.2 Reliability and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4

5.2.1 Mean time between failure (MTB F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.2 Field failure rate vs time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.3 Preve ntive maintenan ce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.4 Service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.5 Service philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.6 Service tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.7 Hot plugging the drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.8 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.9 Product warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

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

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

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

6.2.1 Conduct ed noise immu nity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.2.2 Power sequenc ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.2.3 Current profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.3 Power dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.4 Environmental limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.4.1 Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

viii Barracuda 50FC Produ ct Ma n ua l , Rev . C

6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

6.4.3 Effective altitude (sea level). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

6.4.4 Shock and vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

6.4.4.1 Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

6.4.4.2 Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

6.4.6 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

6.4.7 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

6.5 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

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

7.1 Drive internal defects/errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

7.2 Drive error recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

7.3 FC-AL system errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

8.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

8.1 Drive ID/option selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

8.2 LED connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

8.2.1 J6 connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

8.3 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

8.4 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

8.4.1 Air flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8.5 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8.6 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

9.0 Interface requiremen ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

9.1 FC-AL features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

9.1.1 Fibre Channel link service frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

9.1.2 Fibre Channel task managem ent functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

9.1.3 Fibre Channel task managem ent respons es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

9.1.4 Fibre Channel port login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

9.1.5 Fibre Channel port login accept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

9.1.6 Fibre Channel Proc ess Login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

9.1.7 Fibre Channel Proc ess Login Accept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

9.1.8 Fibre Channel fabric login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

9.1.9 Fibre Channel fabric accept login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

9.1.10 Fibre Channel Arbitrated Loop options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

9.2 Dual port support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

9.3 SCSI commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.3.1 Inquiry data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

9.3.2 Mode Sense data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

9.4 Miscellaneous operating features and con ditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

9.5 FC-AL physical interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

9.5.1 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.5.1.1 Physical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.5.2 Connector requirem ent s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

9.5.3 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

9.5.4 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

9.5.5 FC-AL transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

9.5.6 Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

9.5.7 Fault LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

9.5.8 Active LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

9.5.9 Enable port bypass signal s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

9.5.10 Motor start controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

9.5.11 SEL_6 through SEL_0 ID lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

9.5.11.1 Parallel Enclosure Services Interface (ESI) . . . . . . . . . . . . . . . . . . . .54

9.6 Signal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

9.6.1 TTL input characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

9.6.2 LED driver signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Barracud a 50FC Pr oduct Manual, Rev. C ix

9.6.3 Differential PECL output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

9.6.4 Differential PECL input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

10.0 Seagate Technology support services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

x Barracuda 50FC Produ ct Ma n ua l , Rev . C

Barracud a 50FC Pr oduct Manual, Rev. C xi

List of Figures

Figure 1. Barracuda 50FC family disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Barracuda 50FC disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3. Typical Barracuda 50FC drive +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 4. Typical Barracuda 50FC drive +5V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 5. DC current and power vs. input/output operations per second . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 6. Locations of PCBA components listed in Table 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 7. Recommended mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 8. Mounting configuration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 9. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 10. LED indicator connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 11. Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 12. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 13. Port bypass circuit physical interconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 14. FC-AL SCA device connec tor dimen sions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 15. J6 connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 16. FC-AL transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 17. Transmit eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 18. Receive eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Barracud a 50FC Pr oduct Manual, Rev. C 1

1.0 Scope

This manual describes Seagate Technology®, Inc. Barracuda 50FC (Fibre Channel) disc drives.
Barracuda 50FC drives support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifica-

tions to the extent described i n this manual. The Fibre Channel Interface Manual (par t number 77767496)
describes the general Fibre Channel Arbitrated Loop characteristics of this and other Seag ate Fibre Channel
drive s.

Figure 1.

Barracuda 50FC

family disc drive

Barracud a 50FC Pr oduct Manual, Rev. C 3

2.0 Applicable standards and reference documentation

The drive has been developed as a system peripheral to the highest standards of design and construction. The
drive depends upon its hos t equipment to provide adequat e power and environment in order to ac hieve opti­mum performance and c ompliance with applicable industry and g overnmental regu lations. Special attention
must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regu­lation. In part icular, the drive must be securely mounted in order to guarantee the specified pe rformance c har­acteristics. Mounting by bottom holes must meet the requirements of Section 8.5.

2.1 Standards

The Barracuda 50FC family complies with Seagate standards as noted in the appropriate sections of this man­ual and the Seagate Fibre Channel Interface Manual, part number 77767496.

The Barracuda 50FC disc dri ve is a UL reco gnized component per UL1950, CSA certified to CAN/CSA C22. 2
No. 950-95, and VDE certified to VDE 0805 and EN60950.

2.1.1 Electromagnetic compatibility

The drive, as delivered, is d esigned for system integ ration and installation i nto a suitab le e nclosure prior to u se.
As such the drive is supplied as a subassembly and is not subject to Subp art 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 to
the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host con­troller.

2.1.1.1 Electromagnetic susceptibility

As a component assembly, the drive is not required to meet any susceptibility performance requirements. It is
the responsibility of those integrating the dri ve within their s ystems to perform thos e tes ts req uired a nd des i gn
their system to ensure that equipment operating in the same system as the drive or external to the system
does not adversely affect the performance of the d rive. See Section 5.1.1 on page 13 and Table 1, DC power
requirements, on page 19.

2.1.2 Electromagnetic compliance

Seagate uses an independ ent laboratory to confir m compliance with the direct ives/standards 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 with the directives/standards, 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 Electromagnetic
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 Barracuda 50FC Produ ct Ma n ua l , Rev . C

Australian C-Tick

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

2.2 Reference documents

Barracuda 50FC Installation Guide

Seagate par t number: 83329474

Fibre Channel Interface Manual

Seagate par t number: 77767496

ANSI Fibre Channel Documents

X3.230-1994 FC Physical and Signaling Interface (FC-PH)
X3.297.1997 FC-PH-2 Fibre Channel Physical and Signaling Interface-2
X3.303.1998 FC-PH-3 Fibre Channel Physical and Signaling Interface-3
X3.272-1996 FC Arbitrated Loop (FC-AL)
X3.269-1996 Fibre Channel Protocol for SCSI (FCP)
NCITS TR-19 Private Loop SCSI Direct Attach (PLDA)
NCITS TR-20 Fabric Loop Attachment (FC-FLA)
SFF-8045 Specification for 40-pin SCA-2 Connector with Parallel Selection.
SFF-8067 Specification for 40-pin SCA-2 Connector with Bidirectional Enclosure Services

Interface.

ANSI Small Computer System Interface (SCSI) Documents

X3.131-1994 (SCSI-2)
X3.270-1996 (SCSI-3) Architecture Model
NCITS 305-199X (SCSI-3) Enclosure Services
30553-001 Specification for Acoustic Test Requirement and Procedures

In case of conflict between this document and any referenced document, this document takes precedence.

Barracud a 50FC Pr oduct Manual, Rev. C 5

3.0 General description

BarracudaTM 50FC drives combine dual striped magnetore sistive heads, parti al response/maximum likelihood
(PRML) read channel e lectronics, embedded ser vo technology, an d a Fibre Channel in terface to provide high
performance, high capacity data storage for a variety of systems including engine ering workstations, network
servers, mainframes, and supercomputers.

Barracuda 50FC drives are random access storage devices designed to suppor t the Fibre Channel Arbitrated
Loop (FC-AL) and SCSI Fi bre Channel Protocol as de scribed in the ANS I specifications, this document , and
the Fibre Channel Interface Manual (part number 77767496) which describes the general interface characteris­tics of this drive. ST150176FC drives are classified as intelligent per ipherals and provide level 2 conformance
(highest level) with the ANSI SCSI-1 standard.

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

See Figure 2 for an exploded view of the drive. Never disassemble the HDA. This exploded view is for informa­tion only. Do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires
special facilities. The drive contains no parts replaceable by the user and opening the HDA for any reason
voids your warranty.

Figure 2. Barracuda 50FC disc drive

Barracuda 50FC drives use a dedicated landing zone at the innermost radius of the media to eliminate the pos­sibility of destroying or degrading data by landing in the data zone. The heads automatically go to 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 disengages and t he head load process begins when power is
applied to the drive.

Barracuda 50FC drives decode track location data from the servo data embedded on each surface to eliminate
mechanical transducer adjust m ents and re lated r eliability concerns.

The drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm
design that provides excellent performance with minimal power dissipation.

6 Barracuda 50FC Produ ct Ma n ua l , Rev . C

3.1 S tandard featu r es

Barracuda 50FC drives have the following standard features:

• Integrated dual port FC-AL controller

• Concurrent dual port transfers

• Support for FC arbitrated loop, private and public attachment

• Differential copper FC drivers and receivers

• Downloadable firmware using the FC-AL interface

• 128-deep task set (queue)

• Support s up to 32 initiators

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

mands. Jumpers are not used on the drive.

• Supports SCSI Enclosure Services through the interface connector

• Fibre Channel worldwide name uniquely identifies the drive and each por t

• User-selectable logical block size (512 to 4,096 bytes per logical block)

• Selectable frame sizes from 128 to 2,112 bytes

• Industry standard 3.5-inch low profile form factor dimensions

• Programmable logical block reallocation scheme

• Flawed logical block reallocation at format time

• Programmable auto write and read reallocation

• Reed-Solomon error correction code

• Sealed head and disc assembly (HDA)

• No preventive maintenance or adjustments required

• Dedicated head landing zone

• Automatic ship ping 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

• Reallocation of defects on command (Post Format)

• Fibre Channel interface transports SCSI protocol

3.2 Media description

The media used on the drive has a diameter of approximately 84 mm (approximately 3.4 inches). The alumi­num substrate is coated with a thin film m agnetic material, overcoated with a proprietar y protective layer for
improved durability and environmental protection.

3.3 Performance

• Programmable multi-segmentable cache buffer

• 106 Mbytes/sec maximum instantaneous data transfers per port.

• 7,200 RPM spindle; average latency = 4.17 msec

• Command queuing of up to 128 commands

• Background processing of queue

• Supports start and stop commands

• Adaptive seek velocity; improved seek performance

3.4 Reliability

• 1,000,000 hour MTBF

• LSI circuitry

Barracud a 50FC Pr oduct Manual, Rev. C 7

• Balanced low mass rotary voice coil actuator

• Self-Monitoring Analysis and Reporting Te chnology (S.M.A.R.T.)

• Dithering

3.5 Unformatted and formatted capacities

Formatted capacity depends on the spare reallocation sectors scheme selected, the number of data tracks per
sparing zone, and the number of alternate sectors (LBAs) per sparing zone. The following table shows the
standard OEM model read capacities data. Tot al LBA s = read capacity data shown below + 1.

Formatted Unformatted

ST150176FC 05D2B03Bh blocks (50 Gb ytes with 512 bytes per block) 63.1 Gbytes

Standard OEM models are formatted to 512 bytes per block. You can order other capacities by requesting a dif­ferent sparing scheme and logical block size.

The sector size is selectable at format time. Users having the necessary equipment may modify the data block
size before issuing a format command and obtain different formatted capacities than those listed.
ST150176FC drives use a zone sparing scheme. The drive is divided into frequency zones with a variable
number of spares in each zone.

3.6 Programmable drive capacity

Using the Mode Select command, the drive can change its capacity to something less than maximum. See the
Mode Select (6) parameter l ist table in the Fibre Channel Interface Manual, par t number 77 67496. A value of
zero in the Number of Blocks field indicates that the drive will not change the capacity it is currently formatted
to have. A number other than zero and less than the maximum number of LBAs in the Number of B locks field
changes the total drive capacity to the value in the Number of Blocks field. To restore the drive to maximum
capacity, enter a value of FFFFFFFF in the Number of Blocks field.

3.7 Factory-installed accessories

OEM standard drives are shipped with the Barracuda 50FC Installation Guide (part number 83329474).

3.8 Factory-installed options

You may order the following items which are incorporated at the manufacturing facility during production or
packaged before shipping. Some of the options available are (not an exhaustive list of possible options):

• Other capacities can be ordered depending on sparing scheme and sector size requested.

• Single-unit shipping pack. The drive is nor mally shipped i n bulk packaging to provide max imum 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.

• The Barracuda 50FC Installation Guide, part number 83329474, is usually included with each standard OEM
drive shipped, but extra copies may be ordered.

3.9 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.

• Single-unit shipping pack.

Barracud a 50FC Pr oduct Manual, Rev. C 9

4.0 Performance characteristics

This section provides detailed information concerning performanc e-related character isti cs and features of Bar­racuda 50FC drives.

4.1 Internal drive characteristics

ST150176FC

Drive capaci ty 50.07 .............. .. ........Gbytes (formatted, rou nded off value)

Read/write data heads 22

Bytes per track 189.28 ................... .. .Kbytes (average, rounded off values)

Bytes per surface 2,276 .............. .. ........Mbytes (unformatted, r ounded off value)

Tracks per surface (total) 12,024 ...................... Tracks (user accessible)

Tracks per inch 12,905 ...................... TPI

Pe ak bits per inch 252 .......... .. .. ............ .KBPI

Internal data rate 153-264................. .. .Mbits/sec (variable with zone)

Disc rotation speed 7,184 ........................ rpm (+

Avg r otat ional latency 4.17....................... ...msec

4.2 Seek performance characteristics

See Section 9.5, "FC-AL physical interface" on page 48 and the Fibre Channel Interface Manual (part number

77767496) for additional timing details.

4.2.1 Access time

0.5%)

Including cont roller overhead
(without disconnect)

Read Write

Average Typical
Single track Typical
Full s troke Typical

1. Execut ion time measured from receipt of the FCP Command to the FCP Response.

2. Assumes no errors and no sector has been relocated.

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 = controller overhead + average seek time.

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

3,4

3,4
3,4

7.6 8.4

0.9 1.2
16 17

1, 2

(msec)

4.2.2 Format command execution time for ≥ 512-byte sectors

ST150176FC

Maximum (with verify) 1 20 minutes
Maximum (without verify) 70 minutes

4.2.3 General performance characteristics

ST150176FC

Minimum sector interlea ve 1 to 1

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

Minimum 19.1 MBytes/sec
Average 27.8 MBytes/sec
Maximum 33.0 MBytes/sec

Fibre Channel Interface maximum instantaneous transfer rate 106 Mbytes/sec* per

port (dual port = 212
Mbytes/sec*)

10 Barracuda 50FC Product Manual, Rev . C

Logical block size s

Default is 512-byte data blocks
Variable 512 to 4,096 bytes per sect or in n + 4 intervals (n = number
of bytes per sector).

Read/write consecutive sectors on a tr ack Yes

Flaw reall ocation performance impact (for fla w s reallocated at format time
using the spare sect ors per sparing zone real location scheme .)

Overhead time for head switch in sequential mode 1.2 msec
Overhead time for one track cylinder switch in sequential mode 1.2 msec (typical)
Average rotational latency 4.17 msec

*Assumes no error s and no reloca ted logi cal b loc k s. Rat e measur ed fro m the s tart of the first logi cal
block transf er to or from the host.

Negligible

4.3 Start/stop time

If the Motor Start option is disabled, the drive becomes ready within 35 seconds after DC power is applied. If a
recoverable error condition is detected during the start sequence, the drive executes a recovery procedure and
the time to become ready may exceed 35 seconds. Stop time is less than 20 seconds (maximum) from removal
of DC power.

If the Motor Start opt ion is enabled, the internal controller accepts the comm ands listed in the Fibre Channel
Interface Manual less than 3 seconds after DC power has been applied. After the Motor Star t command has
been received, the drive becomes ready for normal operations within 25 seconds (excluding the error recovery
procedure). The Motor Start comma nd can also be used to command the dr ive 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 (read look-ahead) and multi-segmented cache control algor ithms that in many
cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in
cache operations. To sele ct this feature, the host sends the Mode Sele ct command with the proper values in
the applicable bytes in page 08h. Prefetch and cache operations are independent features from the standpoint
that each is enabled and disabled independently using the Mode Selec t command; however, in actual opera­tion, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.

All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this
drive family are given in Table 16.

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, 840 kbytes (3,600 kbytes of the 4,096 kbytes on units
with this option) can be used as a cache. The buffer can be divided into logical segments (us ing Mode Select
Page 08h, byte 13) from which data is read and to which data is written.

The drive keeps track of the logical block addresses of the data stored in eac h segment of the buffer. If the
cache is enabled (see RCD bit in the Fibre Channel Int erface Manual), dat a reque sted by the h ost with a read
command is retrieved from the buffer, if possible, before any disc access is initiated. If cache operation is not
enabled, the buffer (still segmented with the required number of segments) is still used, but only as circular
buffer s egments during disc medium read operations (disregarding Prefetch operation f or t h e moment). That is,
the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to
retrieve it. The retrieved data merely passes throu gh som e buffer segment on the way to the host. On a c ache
miss, all data transfers to the host are in accordance with buffer-full ratio rules. On a cache hit, the drive ignores

Barracud a 50FC Pr oduct Manual, Rev. C 11

the buffer-full ratio rules. See the explanation provided with the information about Mode Page 02h (disconnect/
reconnect control) in the Fibre Channel Interface Manual.

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 the 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 that is not in any cache segment, the drive fetches it and any

remaining requested logical block addresses from the disc and puts them in a segm ent of the cache. The
drive transfers the remaining requested logical blocks from the cache to the host in accordance with the
Mode Select Disconnect/Reconnect parameters, page 02h.

3. If the prefetch feature is enabled, refer to section 4.5.2 for operation from this point.

Case B

—A Read command requests data, and the first logical block is not in any segment of the cache:

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

from there to the host in accordance with the Mode Select Disconnect/Reconnect parameters, page 02h.

2. If the prefetch feature is enabled, refer to section 4.5.2 for operation from this point.

During a prefetch, the drive crosses a c ylinde r boundary to fetch data only if t he Di sco ntinuity (DISC) bit is s et
to 1 in bit 4 of byte 2 of the Mode Select parameters page 08h. Default is one 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 user-se lectable configurations. The drive supports op eration of any integer
number of segments from 1 to 16. Divide the 840 Kbytes (3,600 kbytes on units with the 4,096 kbytes option) in
the buffer by the number of segments to get the segment size. Default is 3 segments.

Note.

The size of each segment is not reported by Mode Sense c ommand page 08h, bytes 14 and 15. T he
value 0XFFFF is always reported regardl ess of the ac tual size of the se gme nt. Sendi ng a s ize spec ifi­cation using the Mode Select command (bytes 14 and 15) does not set up a new segment size. If the
STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt
to change an unchangeable parameter.

4.5.1 Caching write data

Write caching is a wri te operation by the drive that makes use of a dr ive buffer storage area where the dat a to
be written to the medium is stored while the drive performs the Write command.

If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made avail­able for future read cache hits. T he s am e buffer space and segmentation is used as set up for read functions.
The buffer segmentation scheme is set up or changed independently, having nothing to do with the state of
RCD . When a write command is issued, if RCD=0, the cache is first checked to see if any logical blocks that are
to be written are already stored in the cache from a previous read or write command. If there are, the respec­tive cache segments are cleared. The new data is cached for subsequent Read commands.

If the number of write data logical blocks exceed 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; however, the drive does not overwrite data that has not yet
been written to the medium.

If write caching is enabled (WCE=1), then the drive may return Good status on a write command after the data
has been transferred into the cache, but before the data has been written to the m edium. If an error occurs
while writing the data to the medium, and Good status has already been returned, a deferred error will be gen­erated.

The Synchronize Cache command may be used to force the drive to write all cached write data to the medium.
Upon completion of a Synchronize Cache command, all data received from previous write commands will have
been written to the medium.

Table 16 shows the mode default settings for the drive.

12 Barracuda 50FC Product Manual, Rev . C

4.5.2 Prefetch operation

If the Prefetch feature is enabled, data in c ontiguous logical blocks on the disc i mm edi ate ly beyond that wh ich
was requested by a Read command are retrieved and stored in the buffer for immediate transf er from the buffer
to the host on subs equent Read comman ds t hat reques t t hose logical blocks (this is true even if cache opera­tion is disabled). Though the prefetch operation uses the buffer as a cache, finding the requested data in the
buffer is a prefetch hit, not a cache operation hit.

To enable Prefetch, use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0
enables prefetch.

Since data that is prefetched replaces data already in some buffer segments, the host can limit the amount of
prefetch data to optimize system performance. 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).

During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if Mode parameters
page 08h, byte 2, bit 4 is set to 1 (Discontinuity--DISC bit).

When prefetch (read look-ahead) is enabled (enabled by DRA = 0 ), it operates under the control of A RLA
(Adaptive Read Look-Ahead). If the host uses software interleave, ARLA enables pref etch of contiguous blocks
from the disc when it s enses that a p refetch hit will likely occur, even if two consecutive read operations were
not for physically contiguous blocks of data (e.g. “software interleave”). ARLA disables prefetch when it decides
that a prefetch hit will not likely occur. If the host is not using software interleave, and if two sequential read
operations are not for contiguous blocks of data, ARLA disables prefetch, but as long as sequential read oper­ations request contiguous blocks of data, ARLA keeps prefetch enabled.

Barracud a 50FC Pr oduct Manual, Rev. C 13

5.0 Reliability specifications

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

Seek error rate: Less than 10 errors in 10
Read Error Rates

1

Recovered Data Less than 10 errors in 1012 bits transferred (OEM default settings)
Unrecovered Data Less than 1 sector in 10
Miscorrected Data Less than 1 sector in 10

Interface error rate: Less than 1 error in 10

Less than 1 error in 10

See Section 9.6.4, "Differential PECL input." on page 57
MTBF: 1,000,000 hours
Service life: 5 years
Preventive maintenance: None required

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

5.1 Error rates

The error rates stated in this 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 command.

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

• Assume random data.

8

seeks

15

bits transferred

21

bits transferred

12

bits transferred with minimum receive eye.

14

bits transferred with typical receive eye.

5.1.0.1 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.

5.1.1 Environmental interference

When evaluating systems operation under conditions of electromagnetic interference (EMI), the performance
of the drive within the s ystem is co nsidered acceptable if the drive 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

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

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

5.1.2 W rite err ors

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

If an unrecoverable write error occurs because of an equipment malfunction in the drive, the error is classified
as a failure affecting MTBF. Unrecoverable write errors are those that cannot be c orrected wi thin t wo at tempts
at writing the record with a read verify after each attempt (excluding media defects).

5.1.3 Seek errors

A seek error is defined as a failure of the drive to position the heads to the addressed track. There must not be

8

more than ten recoverable seek errors in 10

physical seek operations. After detecting an initial seek error, the

drive automatically performs an error recovery process. If the error recovery process fails, a seek positioning

14 Barracuda 50FC Product Manual, Rev . C

error (15h) is reported with a Medium error (3h) or Hardware error (4h) reported in the Sense Key. This is an
unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Refer to
the Fibre Channel Interface Manual, par t number 77767496, for Request Sense information.

5.2 Reliability and service

You can enhance the reliability of Barracuda 50FC disc drives by ensuring that the drive receives adequate
cooling. Section 6.0 provides temperature mea surements and sec tion 8.4 provides cooling and air flow infor­mation which you can use to enhance the service life of the drive.

5.2.1 Mean time between failure (MTBF)

The production disc drive achieves an MTBF of 1,000,000 hours when operated in an environment that
ensures the case temperatures spec ified in Section 6.4.1 a re not exceeded. Shor t-term excursions up t o the
specification limits of the operating environment will not affect MTBF performanc e. Op erating the dr ive at case
temperatures above these values wil l adversely affect the drive’s ability to meet specifications. See Section 6.4,
"Environmental limits".

The MTBF target is specified as device power-on hours (POH) for all drives in service per failure.
The following expression defines MTBF:

MTBF per measurement period = Estimated power-on operating hours in the period

Number of drive failures in the period

Estimated power-on operating hours means power-on hours per disc drive times the total number of disc drives
in service. Each disc drive must have accumulated at least nine months of operation. Data is calculated on a
rolling average base for a minimum period of six months.

MTBF is based on the following assumptions:

• 8,760 power-on hours per year

• 250 average on/off cycles per year

• Operating at nominal voltages

• System provides adequate cooling to ensure the case temperatures specified in Section 6.4.1 are not

exceeded.
Drive failure means any stoppage or substandard performance caused by drive malfunction.
A S.M.A.R.T. (Self-Monitoring Analysis and Repor ting Technology) predictive failure indicates that the drive is

deteriorating to an imminent failure and is considered an MTBF hit.

5.2.2 Field failure rate vs time

The expected field failure rate is liste d b elo w. Drive utiliz at io n w ill vary. An estimat e range of utiliz ation is:

• 720 power-on hours (POH) per month

• 250 on/off cycles per year

• Read/seek/write operation 90% of POH

• System provides adequate cooling to ensure the case temperatures specified in Section 6.4.1 are not

exceeded.

Month P arts per million (PPM)

1 2,364
2 1,422
3 1,403
4 1,391
5 1,317
6 1,255
7 1,162
8+ 1,025

Barracud a 50FC Pr oduct Manual, Rev. C 15

Failure rate is calcula t ed as follows:

• No system-induced failures counted

• PPM targets include 30% no defect found and handling failures

• Based on 1,000,000 MTBF and 720 POH per month

• Month 1’s rate includes a 300 PPM installation failure

5.2.3 Preventive maintenance

No routine scheduled preventive maintenance is required.

5.2.4 Service life

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

5.2.5 Service philosophy

Special equipment is required to repair the d rive HDA. To achieve the above service life, repairs must be per­formed only at a properly equi pped and staffed Seagate s erv ice and repa ir facility. Troubleshooting and rep air
of PCBs in the field is not recommended becaus e of the extensive diagnostic equipment required for effective
servicing. There are not spare par ts available for this drive. The drive warranty is voided if the HDA is opened.

5.2.6 Service tools

No special tools are required for site installation or recommended for site maintenance. Refer to Section 5.2.5.
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.

5.2.7 Hot plugging the driv e

Inserting and re moving the drive on the FC-AL will interrup t loop operation. The interruption occurs when the
receiver of the next device in the loop must synchronize to a dif ferent input signal. FC e rror detection mec ha­nisms, character sync, running disparity, word sync, and CRC are able to detect any error. Recovery 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 optional port 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 drive 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 temperature, energy, voltage hazard,
or ESD potential hazard is presented during the hot connect/disconnect 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.

16 Barracuda 50FC Product Manual, Rev . C

5.2.8 S.M.A.R.T.

S.M.A.R.T. is an a cronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended
to recognize conditions that in dicate imminent drive failure and is designed to provide sufficient warni ng of a
failure to allow you to back up the data before an actual failure occurs.

Note.

The dr ive’s firmware monitors specific attributes for degradation over time but can’t predict instanta­neous drive failures.

Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating per­formance of the drive and the thresholds are optimized to minimize “false” and “failed” predictions.

Controll ing 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 DEX CPT 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 wr ite operations. When the PERF bit is set, the drive is considered to be in “O n-line Mode
Only” and will not perform off-line functions.

You can measure off-line attributes and force the drive to save the data by using the Rezero Unit command.
Forcing S.M.A.R.T. resets the timer so that the next scheduled 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 occu r. Forcing S.M.A.R.T. with the RTZ command
rese ts th e time r.

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 subje ct t o an i dle peri od on the FC-AL
bus. The process of measuring off-line attribute data and saving data to the disc is uninterruptable. The maxi­mum on-line only processing delay is summarized below:

Maximum processing delay

On-line only delay
DEXCPT = 0, PERF = 1

S.M.A.R.T. delay times 50 milliseconds 50 milliseconds

Fully-enabled delay
DEXCPT = 0, PERF = 0

Repor ti ng c o nt rol

Reporting is controlle d by the MRIE bits in the Informational Exce ptions Control mode page (1Ch). Subject to
the reporting method, the fir mware will i ssue to t he ho st an 01-5D00 sense code. The error code is preser ved
through bus resets and power cycles.

Determining rate

S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded errors
increases to an unacceptable level. To deter m ine rate, error events are logged and compared to the number of
total operations for a given attribute. The interval defines the numb er of operations over which to measure the
rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter.

S.M.A.R.T. measures error rates. All errors for each monitored attribute are recorded. A counter keeps track of
the number of errors for the current interval. This counter is referred to as the Failure Counter.

Error rate is the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to
set thresholds for the number of errors and their interval. If the number of errors 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.

Barracud a 50FC Pr oduct Manual, Rev. C 17

Predictive failures

S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. 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 Count er.
There is a separate Failure History Counter for each attribute.

5.2.9 Product warranty

Beginning on the date of shipm ent to the cus tom er and c ontinuing for a period of five years, Seagate warrants
that each product (includi ng compone nts and sub assemblies) that fails to func tion properl y under norm al use
due to defect in materials or workmanship or due t o nonconformance to the applicable specifications will be
repaired or replaced, at Seaga te’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 Seag ate’s warranty procedure. Seagate
will pay for transporting the repair or replacement item to the customer. For more detailed warranty inf ormation,
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. You c an also determine rem aining warranty u sing t he Se agat e web site (www.seagate.com).
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 recei pt of co mpo nents improperly packaged or obviously damage d in tran­sit. Contact your authorized Seagate distributor to purchase additional boxes. Seagate recommends shipping
by an air-ride carrier experienced in handling computer equipment.

Product repair and return informat i on

Seagate customer ser vice cent ers are the on ly facilities authorized to ser vice Seag ate drives. Seagate does
not sanction any third-party repair facilities. Any unauthorized repair or tampering with the factory seal voids
the warranty.

Barracud a 50FC Pr oduct Manual, Rev. C 19

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 dr ive are shown below. Values indicated apply at the dr ive
connector.

Table 1: DC power requirements

ST150176FC

Notes (Amps) (Amps)

Voltage +5V +12V [2]
Regulation [5] ±5% ±5% [2]
Avg idle curre nt DCX
Maximum starting current

(peak DC) DC [3] 1.1 2.66

(peak AC) AC [3] 1.28 3.35
Dela yed motor start (ma x) DC [1] [4 ] 1.07 0.04
Peak operating current:
Typical DCX
Maximum DC [1] 1.14 1.15
Maximum (peak) DC 1.4 2.6

[1] [7] 1.03 0.71

[1] [6] 1.1 1.08

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

ues. Po wer supply at nominal voltage.

[2] For +12 V, a –10% tolerance is allowed during ini tial spin dle start but must return to ±5% before reaching

7,200 RPM. The ±5% must be maintaine d after the drive signifies that its power-up sequenc e has been

completed 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 t he Motor Star t option is e nabled and the drive has not yet received a Star t

Motor co mm a n d.
[5] See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and

transient response.
[6] Operating condition is defined as random 8 block reads at 130 I/Os per second. Current and power speci-

fied at nominal voltages. Increasing +5 volt supply by +5% increases 5 volt current by < 1.3%. Decreasing

+12 volt supply by 5% increases +12 volt current by 1.6%.
[7] During idle, the drive heads are relocated every 60 seconds to a random lo cation within the band from

track zero to one-fourth of maximum track.

General DC power requirement notes.

1. Minimum current loading for each supp ly voltage is not less than 1.4% of the max imum 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 f or i ndividual drive

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

4. Parameters, other than spindle start, are measured after a 10-minute warm up.

20 Barracuda 50FC Product Manual, Rev . C

6.2.1 Conducted noise immunity

Noise is specified as a per iodic and random distri bution of frequencies covering a band from DC to 10 MHz.
Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive 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 sequencing. The dr ive protects aga inst inadvert ent wr iting during p ower-up
and down.

6.2.3 Curre nt pro fil es

Figure 3 identifies the drive +12V current pro file and Figure 4 identifies the dr ive +5V current profile. The cur­rent during the various times is as shown:

T0 Power is appl ied to the drive.
T1 Controller self-tests are per formed.
T2 Spindle begins to accelerate under current limiti ng after performing internal diagnostics .
T3 Spindle is up to speed and the Head-Arm restraint is unlocked.

Note:

All times and currents are typical. See Table 1 for maximum current requirements.

+12 Volt Current during spindle start – Typical Amperes

3.0

2.5

2.0

1.5

Amps

1.0

0.5

0.0
T0T1 T2 T3 T4

Peak AC Envelope

Average DC value of waveform

0.0 2.0 4.0 6.0 10.0 12.0 14.0 16.0

Figure 3. Typical Barracuda 50FC drive +12V current profile

8.0

TIME (seconds)

Barracud a 50FC Pr oduct Manual, Rev. C 21

+5 Volt Current during spindle start – Typical Amperes

Average value of waveform

1.5

Amps

1.0

0.5

0.0

0.0 4.0 8.0 12.0 20.0 24.0 28.0 32.0

16.0

TIME (seconds)

Figure 4. Typical Barracuda 50FC drive +5V current profi le

Envelope of waveform

22 Barracuda 50FC Product Manual, Rev . C

6.3 Power dissipation

Typical power dissipation under idle conditions is 13.67 watts (46.6 BTUs per hour).
To obtain operating power for typical (8 block) random read operations, refer to the following I/O r ate curve (see

figure 5). Locate the t ypical I/O rate for a dr ive in your sy stem on the horizontal axis and read the correspond­ing +5 volt current, +12 volt current, and the total watts for a drive in your system on the vertical axis. To calcu­late BTUs per hour, multiply watts by 3.4123.

1.600

1.400

1.200

1.000

Amperes

0.800

0.600

0.400

0.200
050

I/Os per Second

Figure 5. DC current and power vs. input/output operations per second

100 150

19

17

15

13

11

5V A
12V A
Watts

Watts

6.4 Environmental limit s

Temperature and hum idity values experienced by the drive must be such that condensation does n ot occur on
any drive part. Altitude and atmospheric pressure specifica tions are referenced to a standard day at 58.7°F
(14.8°C). Maximum wet bulb temperature is 82°F (28°C).

6.4.1 Temperature

a. Operating

With cooling designed to maintain the case temperatures of Table 2, the drive meets all specifications over
a 41°F to 122°F (5 °C to 50°C) drive ambient temperature range with a maximum temp erature gradient of
36°F (20°C) per hour. The enclosure for the drive should be designed such that the temperatures at the
locations specified in Ta ble 2 are not exceeded. Air flow may be needed to achieve these temperature val­ues (see Section 8.4 and 8.4.1). Operation at case temperatures above these values may adversely affect
the drives ability to meet specifications.

The MTBF specification for the drive is based on operating in an environment that ensures that the case
temperatures specified in Table 2 are not exceeded. Occasional excursions to drive amb ient temperatures
of 122°F (50°C) or 41°F (5°C) may occur without impact to specified MTBF. Air flow may be needed to
achieve these temperatures (s ee Section 8.4.1). Continual or sustained operation at case temperatures
above these values may degrade MTBF.

To confir m that the required cooling for the elec tronics and HDA is provided, place the drive in its final
mechanical configuration, perform random write/read operations. After the temperature s stabilize, measure
the case temperature of the components listed in Table 2 (see note [2]).

The maximum allowable HDA case temperature is 60°C. Operation of the drive at the maximum case tem­perature is intended for short time periods only. Continuous operation at the elevated temperatures will
reduce product reliability.

Barracud a 50FC Pr oduct Manual, Rev. C 23

Table 2: PCBA and HDA temperatures

Items in
Figure 6

Maximum allo w able
case temperature (
operating

°

C)

Maximum allo w able
case [3] temperatures (°C)
to meet MTBF spec.

HDA [2] 60 45
Processor 63 43
A/D Demod 81 61
FC Inte rface 91 71
Motor Driver 66 46

Notes.

[1]

Section
lines in column 2. Air flow was opposite that shown in Section

8.4.1

describes the a ir-flow patterns used w hen generating the 1 m illion hours MTBF guide-

8.4.1

. Local air velocity was 1.64 m/sec

(330 lfpm). Inlet air temperature to the dr ive was 77°F (25°C), plus 9°F (5°C) temperature rise in the

test enclosure (86°F/30°C ambient local to the drive).

[2]

Measure HDA temp at point labeled “HDA” on Figure 6.

[3] PCB mounted integrated circuit case.

b. Non-operating

–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This
specification assumes that the drive is packaged in the shipping container designed by Seagate for use with
drive.

HDA Temp.

Check Point

1.00

14

3

Figure 6. Locations of PCBA components listed in Table 2

2

24 Barracuda 50FC Product Manual, Rev . C

6.4.2 Relative humidity

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

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

b. Non-operating

5% to 95% non-condensing relative humidity.

6.4.3 Effective altitude (sea level)

a. Operating

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

b. Non-operating

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

6.4.4 Shock and vibration

Shock and vibration limits specified in this document are me asured directly on the dri ve chassis. If the dri ve is
installed in an enclosure to which the stated shock and/or vibration criteria is ap plied, resonances may occur
internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent,
it may be necessary to modify the enclosure to minimize drive movement.

The limits of shock and vibration defined within this document are specified with the drive mounted by any of
the four methods shown in Figure 7, an d in ac cordance with the restri ctions of S ection 8.5. Or ientation of the
side nearest the LED may be up or down.

6.4.4.1 Shock

a. Operating—norm al

The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not
exceeding 5.0 Gs at a maximum duration of 11 msec (half sinewave). Shock may be applied in the X, Y, or
Z axis.

b. Operating—abnorm al

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

c. Non-operating

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

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

The drive subjected to nonrepetitive shock not exceeding 150 Gs at a maximum duration of 2 msec (half
sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,
or Z axis.

The drive subjected to nonrepetitive shock not exceeding 45 Gs at a maximum duration of 0.5 msec (half
sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,
or Z axis.

Barracud a 50FC Pr oduct Manual, Rev. C 25

d. Packaged

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

Pac kage size Pack aged/product weight Drop height

<600 cu in (<9,800 cu cm) Any 60 in (1524 mm)
600-1800 cu in (9,800-19,700 cu cm) 0-20 lb (0 to 9.1 kg) 48 in (1219 mm)
>1800 cu in (>19,700 cu cm) 0-20 lb (0 to 9.1 kg) 42 in (1067 mm)
>600 cu in (>9,800 cu cm) 20-40 lb (9.1 to 18.1 kg) 36 in (914 mm)

Z

Y
X

Figure 7. Recommended mounting

X

Z

Y

26 Barracuda 50FC Product Manual, Rev . C

6.4.4.2 Vibration

a. Operating - normal

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

5-400 Hz @ 0.5 G

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

b. Operating - abnormal

5-400 Hz @ 0.75 G (X, Y, or Z axis) 0 to peak

c. Non-operating

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

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

5-22 Hz @ 0.081 inches (2.05 mm) displacement
22-400 Hz @ 2.00 G

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

6.4.5 Air cleanliness

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

6.4.6 Acoustics

Sound power during idle mode shall be 4.0 bels typical when measured to Seagate specification 30553-001.

6.4.7 Electromagnetic susceptibility

See Section 2.1.1.1.

Barracud a 50FC Pr oduct Manual, Rev. C 27

6.5 Mechanical specifications

Refer to Figure 8 for detailed mounting configuration dimensions. See Section 8.5, “Drive mounting.”

Height: 1.62 in 41.1 mm
Width: 4.000 in 101.6 mm
Depth: 5.75 in 146.05 mm
Weight: 2.2 pounds 0.99 kilograms

B

Motherboard Ref.

P

R[3]

H

1.875–.0051.875–.005

(.809)

[4]

Common centerline

in the horizontal

(X axis) direction

of the drive

Pin 1

J

K

[2]

Low
Profile

Half
Height

N

.136

[1]

F

D

E

L

C

M

Notes:

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

[1]

Max screw length into side of drive is 0.15 in.
(3.81 mm).

Mounting holes four on bottom, 6-32 UNC.

[2]

Max screw length into bottom of drive is 0.15 in.
(3.81 mm).

Keep-out zone for any components on

[3]

backplane.
Connector is centered on module and flush

[4]

with end of base.

A

Inches Millimeters

5.75

A
B
C
D
E
F

H
J
K
L

M
N

P
R

4.00

1.026
.620

4.000
.250

3.750

2.380

1.750

0.181

1.622

1.620

.1215
.1215

–
–

max
ref

–

+

—
–

–
–

+

—

+

—
–

max
max

0.025

0.015

0.010

0.011

0.005

0.010

0.010

0.010

0.013

0.007

0.027

0.021

0.025

146.05

101.6

26.060

15.748

101.600

6.350

95.25

60.45

44.450

4.590

41.20

41.150

3.080

3.080

– .64
– .381

max
ref
– .25
+ .28

— .12
– .25

– .25
– .50

+ .33
— .18
+ .69

— .53
– .64

max
max

Figure 8. Mounting configuration dimensions

Barracud a 50FC Pr oduct Manual, Rev. C 29

7.0 Defect and error management

The drive, as delivered, complies with this prod uc 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 management 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

During the initial drive format operation at the factory, media defects are identified, tagged as being unusable,
and their locations recorded on t he drive primar y defects list (referred to as the “P’ list and also as the ETF
defect list). At factory format time, these known defects are also reallocated, that is, reassigned to a new place
on the medium and the locat ion listed in the defects reallocation table. The “P” list is not altered after factory
formatting. Locations of defects found and reallocated during error recovery procedures after drive shipment
are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator using the
Read Defect Data command.

Details of the SCSI comma nds suppor ted by the drive are d escribed i n the Fibre Chann el Interface Manual.
Also, more information on the drive Error Recovery philosophy is presented in the Fibre Channel Interface
Manual.

7.2 Drive error recovery procedures

When an error occurs during drive operation, the drive, if programmed to do so, performs error recovery proce­dures to attempt to recover the data. The error recovery procedures used depend on the options previously set
in the Error Recovery Parameters mode page. Error recovery and defect management may involve using sev­eral SCSI comma nds described in t he Fibre Channel I nterface Manual. The drive implements selectable error
recovery time limits required in video applications.

The error recovery scheme supported by the drive provides a wa y t o control the total error recovery time for the
entire command in addition to contr ollin g th e r ec overy level for a single LBA. The t ot al amount of time sp ent i n
error recovery for a command can be limited using the Recovery Time Limit bytes in the Error Recovery mode
page. The total amount of time spent in e rror recovery for a single LBA can be limited using the Read Retr y
Count or Write Retry Count bytes in the Error Recovery mode page.

The drive firmware error recovery algorithms cons ists of 12 levels for read recoveries and 16 levels for write.
Each level may consist of multiple steps, where a step is defined as a recovery function involving a single re­read or re-write attempt. The m ax imum level used by the drive in LBA recovery is det ermined by the read a nd
write retry counts.

Table 3 equates the read and write retry count with the maximum possible recovery time for read and write
recovery of individual LBAs. The times given do not include time taken to perform reallocations. Reallocations
are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the recov­ery time limit for the command has not yet been met. Tim e needed to perform reallocation is not counted
against the recovery time limit.

30 Barracuda 50FC Product Manual, Rev . C

When the RC bit is one, reallocations are disabled even if the ARRE or AWRE bits are one. The drive will still
perform data recovery actions within the limits defined by the Read Retry Count, Write Retry Count, and
Recovery Time Limit parameters. However, the drive does not report any unrecovered errors.

Table 3: Read and write retry count maximum recovery times

Maximum recovery time per

Read retry count

0 108.7 0 50.2
1 125.4 1 75.2
2 426.4 2 83.6
3 459.8 3 108.7
4 526.7 4 259.2
5 593.6 5 (default) 317.7
6 760.3
7 877.2
8 919.0
9 985.1
10 2,273.2
11 (default) 3,223.4

1

LBA (cumulative, msec)

Write retry count

Maximum recovery time

1

per LBA (cumulative,
msec)

[1] These values may change at any time. They are presently for general information only.

Setting these retry count s to a value below the default setting could result in degradation of the unrecov­ered error rate. For example, suppose the read/write recovery page ha s the RC bit = 0, the read retry
count set to 4, and the recovery time limit set to 450. A 4-block read command can take up to 526.68
msec recovery time for each block and a maximum of 450 msec recovery for all four blocks. If either of
these limits is r eached and a block has no t yet b een r ec overed, the co mm and will end with Check C ondi­tion status and an unrecoverable read error will be reported.

7.3 FC-AL system errors

Information on the repor ting of operational errors or faults across the interface is given in the Fibre Channel
Interface Manual. The FCP Response retur ns informa tion to the host about nume rous kinds of errors or faults.

The Receive Diagnostic Results reports the results of diagnostic operations performed by the drive.
Status returned by the drive to the initiator is described in the Fibre Channel Interface Manual. Status reporting

plays a rol e i n systems error management and its use in that respect is described in sect ions where the various
commands are discussed.

Barracud a 50FC Pr oduct Manual, Rev. C 31

8.0 Installation

Barracuda 50FC disc drive installation is a plug-and-play process. There are no jumpers, switches, or termina­tors on the drive. Simply plug the drive into the host’s 40-pin Fibre Channel backpanel connect or (FC -SCA)
no cables are required. See Section 9.5 for additional information about this connector.

Use the FC-AL interface 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_PAs available (see Table 22 on page 55). 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 h ard addresses (and therefore have
duplicate selection IDs assigned to two or m ore devices), the FC-AL ge nerates a m ess age in dicating this c on­dition. If you set the AL_PA on the backpanel to a value of 0, the system issues a uni que soft-assi gned physical
address automatically.

Loop initialization is the process used to verify or obtain an addres s. 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.

—

8.1 Drive ID/option selection

All drive options are made through th e interface connector (J1). Table 19 on page 51 provides the pin descrip­tions for the 40-pin Fibre Channel single connector (J1).

8.2 LED connections

A connector, J6, is provided on the printed circuit board assembly (PCBA) to provide port bypass, drive active,
and drive fault LED connections (see Figure 10 on page 3 2). See Sections 9.5.7, 9.5.8, and 9.5 .9 for descrip­tions of LED functions.

J6

Figure 9. Physical interface

32 Barracuda 50FC Product Manual, Rev . C

Drive
Front

Pin 1

J6

Reserved

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

[1] The drive has a 2.2K ohm resi stor in s eri es with t his LE D dr iver. 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 external 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.

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

Figure 10. LED indicator connector

8.2.1 J6 connector requirements

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

8.3 Drive orientation

The drive may be mounted in any orientation. All drive performance characterizations, however, have been
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 amb ient tem perature immediately s urrounding
the drive will not exceed temperature conditions specified in Section 6.4 .1, "Tem perature." 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, "Tempera ture."

Barracud a 50FC Pr oduct Manual, Rev. C 33

8.4.1 Air flow

The rack, cabinet, or drawer environment for the drive must provide heat removal from the electronics and head
and disc assembly (HDA). You should confir m that adequate heat removal is provided using the temperature
measurement guidelines descr ibed in Section 6.4.1.

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

If forced air is determined to b e neces sary, possible air-flow patterns are shown in Figure 11. The air-flow pat­terns are created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction,
convection, or other forced air-flow patterns are acceptable as long as the temperature measurement guide­lines of Section 6.4.1 are met.

Above unit

Under unit

Above unit

Under unit

Figure 11. Air flow

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)

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 dr ive 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 X = F < 15lb = 67N

where K is the mounting surface stiffness (units in lb/in or N/mm) and X is the out-of-plane surface distor tion
(units in inches or milli meters). The out-of- plane distor tion (X) is deter mined by defining a plane with three of
the four mounting points fixed and evaluating the out-of-plane deflection of the fourth mou nting point when a
known force (F) is applied to the fourth point.

34 Barracuda 50FC Product Manual, Rev . C

Note.

Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Tech­nology that the drive can meet t he shock and vibration specifications given herein while mounted in
such an adapter frame. Adapter frames that are available may not have a mechanical structure capa­ble of mounting the drive so that i t can meet t he shoc k and v ibration specifications listed i n t his manual.

8.6 Grounding

Signal ground (PCBA) and HDA ground are connected together in th e drive and cannot be separated by the
user. The equipment in which the drive is mounted is connected directly to th e HDA and PCBA with no el ectr i­cally isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCBA
ground, the systems integrator or user must provide a nonconduc tive (electrically isolating) meth od of mount­ing the drive in the host equipment.

Increased radiated emissions may result if you do not provide the maximum s urface area ground connection
between syste m gr o und and drive ground. This is the system designer’s and integrator’s responsibility.

Barracud a 50FC Pr oduct Manual, Rev. C 35

9.0 Interface requirements

This section partially describes the interface requirements as implemented on ST150176FC drives. Additional
information is provided in the Fibre Channel Interface Manual (part number 77767496).

9.1 FC-AL features

This section lists the Fibre Channel-specific features supported by Barracuda 50FC drives.

9.1.1 Fibre Channel link service frames

Table 4 lists the link services suppor t ed by Barracuda 50FC drives.

Table 4: Link services supported

T ype of frame Link service

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

Basic_Reject (BA_RJT)

Extended link service frames N_Port Login (PLOGI)

Fabric Logi n (FLOGI)
Logout (LOGO)
Process Login (PRLI)
Process Logout (PRLO)
Read Link Status (RLS)
Fabric Address Notification (FAN)
Port Di scove ry (PDISC)
Address Discovery (ADISC)
Third-party Process Logout (TRPLO )

Extended link service reply fr am es Accept (ACC)

Link Service Reject (LS_RJT)

Fibre Channel Services Register FC-4 Types (RFT_ID)

9.1.2 Fibre Channel task management functions

Table 5 lists the Fibre C hannel SC SI F ibre Chan nel Prot oc ol (FC SCSI FCP) task managem ent f uncti ons sup­ported.

Table 5: Fibre Channel SCSI FCP task management functions

T ask name Supported

Terminate task
Clear ACA
Target reset
Clear task set
Abort task set

No
Yes
Yes
Yes
Yes

9.1.3 Fibre Channel task management response s

Table 6 lists the FC SCSI FCP response codes return ed for task management functions supported.

Table 6: FC SCSI FCP response codes

Function name Response code

Function complet e
Function not supported
Function reject

00
04
05

36 Barracuda 50FC Product Manual, Rev . C

9.1.4 Fibre Chann e l port login

Table 7 identifies the required content of the N_Port Login (PLOGI) payload from an initiator.

Table 7: 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 XXXXXXXXPNPNPNPNPNPNPNPNNNNNNNNN
32-35 NN NN NN NN
36-47 XXXXXXXXXXXXXXXXXXXXXXXXClass 1
48-51 XX XX XX XX
52-63 XXXXXXXXXXXXXXXXXXXXXXXXClass 2
64-67 XX XX XX XX
68-79 SOSOIC IC XXXXFSFS XXCSXXXXClass 3
80-83 OS OS XX XX
84-95 XXXXXXXXXXXXXXXXXXXXXXXXReserved
96-99 XX XX XX XX
100-111 XX XX XX XX XX XX XX XX XX XX X X XX Vendor
112-115 XX XX XX XX Version

X Indicates a four-bit (hex) field is not checked.
x Indicates a single bit is not checked.
BB BB-Credit. This field is not checked. The FC-AL drive uses BB-Credit of zero (0).
CF Common features. This binary field selects the common features requested by the initiator login.

MSB Continuously increasing offset Must = 1

Random relative offset Not checked. Port Login Accept will return a 0—not sup-

ported.
Valid version level x
N_Port/F_Port Must = 0, N_Port
Alternate credit model Must = 1
Other bits reserved xxx XX

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

128 < FS < 2,112 and a multiple of four bytes. For multiple frame sequences, all frames but the last
frame of the sequence must be this size. Only the receive buffer field size in the Class 3 parameters is
used.

PN Port name (initiator’s)—saved with the login parameters. If a change of the port name/AL_P A address

association is detected during a Port DISCovery, and implicit logout occurs and the initiator returns a

LS_RJT.
NN Node name. The node name is not checked or saved by the drive.
SO Service options Class 3 only.

MSB Class valid Must = 1

Intermix x
Stacked connection req. xx
Sequential delivery x
Other bits reserved xxx XX

IC In itiato r control

MSB XID reassign xx

Proc Assc 10 or 11 causes the login to be rejected. Other values are

accepted.

Other bits XXX

Barracud a 50FC Pr oduct Manual, Rev. C 37

CS Concurrent sequences Must be a value greater than 0.
OS Open sequences per exchange Must be a value greater than 0.

9.1.5 Fibre Channel port login accept

Table 8 identifies the N_Port Login access payload values.

Table 8: N_Port Login Accept (ACC) payload

Bytes

0-15 02 00 00 00 09 09 00 00 88 00 FS FS 00 FF 00 01 Common
16-31 000001F420PP002037UIUIUI20000020
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 800000000000FSFS00FF0000Class 3
80-83 00 01 00 00
84-95 000000000000000000000000Reserved
96-99 00 00 00 00
100-111 00 00 00 00 00 00 00 00 00 00 00 00 Vendor ­112-115 00 00 00 00 Version

FS Receive buffer field size. The drive returns and uses the receive buffer size from the N_Port Login

Class 3 receive bu ffer.

UI Unique identifier. This 24-bit field is uniquely assigned to the drive. This same UI appears in the Port

Name and Node Name fields.

PP Port identifier field.

01 P_LOG I rec eived on Port A.
02 P_LOG I rec eived on Port B.

9.1.6 Fibre Channel Process Login

Table 9 lists the process login payload data.

Table 9: Process Login (PLRI) payload

Bytes

0-15 20 10 00 14 08 00 20 00 XX XX XX XX XX XX XX XX
16-19 00 00 00 22

XX Indicates fields that are not used.

38 Barracuda 50FC Product Manual, Rev . C

9.1.7 Fibre Channel Process Login Accept

Table 10 lists Barracuda 50FC process login accept payload data.

Table 10: Process Login Accept (ACC) pa yload

Bytes

0-15 02 10 00 14 08 00 21 00 00 00 00 00 00 00 00 00
16-31 00 00 00 12

9.1.8 Fibre Chann e l f a bric l og i n

Table 11 lists the fabric login payload from the drive.

Table 11: Fabric Login (FLOGI) payload

Bytes

0-15 04 00 00 00 09 09 00 00 08 00 08 40 00 00 00 00 Common
16-31 00 00 02 F4 20 PP 00 20 37 UI UI UI 02 00 00 20
32-35 37 UI UI UI
36-47 00 00 00 00 00 00 00 00 00 00 00 00 Class 1
48-51 00 00 00 00
52-63 00 00 00 00 00 00 00 00 00 00 00 00 Class 2
64-67 00 00 00 00
68-79 80 00 00 00 00 00 08 40 00 00 00 00 Class 3
80-83 00 00 00 00
84-95 00 00 00 00 00 00 00 00 00 00 00 00 Reserved
96-99 00 00 00 00
100-111 00 00 00 00 00 00 00 00 00 00 00 00 Vendor ­112-115 00 00 00 00 Version

UI Unique identifier. This 24-bit field is uniquely assigned to the drive. This same UI appears in the Port

Name and Node Name fields.

PP Port identifier field.

01 FLOGI originated on Port A.
02 FLOGI originated on Port B.

Barracud a 50FC Pr oduct Manual, Rev. C 39

9.1.9 Fibre Channel fabric accept login

Table 11 lists the required content of the Fabric Login Accept (ACC) payload from the fabric.

Table 12: Fabric Login Accept (ACC) payl oad

Bytes

0-15 02 00 00 00 09 09 BB BB CF XX FS FS R_ A_ T0 V_ Common
16-31 E_ D_ T0 V_ 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 xx xx XX XX FS FS XX xx 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 Vendor ­112-115 XX XX XX XX Version

X Indicates a four-bit (hex) field is not checked.
x Indicates a single bit is not checked.
BB BB-Credit. This field is not checked. The FC-AL drive uses BB-Credit of zero (0).
CF Common features. This binary field selects the common features requested by the fabric login.

MSB Continuously increasing offset x

Random relative offset x
Valid version level x
N_Port/F_Port Must = 1, F_Port
Alternate credit model Must = 1
Other bits reserved xxx XX

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

128 < FS < 2,112 and a multiple of four bytes. The receive buffer field size in the Class 3 parameters is
used. The drive uses the lower FS of Fabric Login Accept or N_Port Login when sending frames to an
initiator.

PN Port Name. The fabric port name is saved with the login parameters. If a change of the por t name is

detected during a FAN, an implicit logout occurs and a LS_RJT is returned to the fabric.
NN Node Name. The drive does not check or save the node name.
SO Service Options—Class 3 only.

MSB C la s s valid Must = 1

Intermix x
Stacked connection req. xx
Sequential delivery M ust = 1
Other bits reserved xxx XX

40 Barracuda 50FC Product Manual, Rev . C

9.1.10 Fibre Ch annel Arbitrated Loop op t io ns

Table 13 lists the FC-AL options supported by Barracuda 50FC drives.

Table 13: FC-AL options supported

Option Supported

OPEN Half Duplex Accepted from another device.
OPEN Full Duplex Sent to open another device.

Accepted from another device.
Private Loop Yes
Public Loop Yes
Old Port State No
Loop Pos ition Yes
Loop Pos it ion Report Yes

9.2 Dual port suppor t

ST150176FC drives have two independent FC-AL port s. These por ts may be connected on independent loops
or on the same loop. Port A and Port B may be connected in any order or combination.

• If both ports are connected on independent loops and hard addressing is used, the drive interface address is
selected through the interface connector, both ports will seek the same loop address. If no conflict, both
ports will have the same loop address.

• If both ports are conne cted in the same loo p and hard addressing is used, at least one por t will attem pt tak­ing a soft address to prevent an address conflict.

Note.

When a Barracuda 50FC drive is connected in loops with previous Seagate FC drive products:
Barracuda 4LP FC (ST32171FC, ST34371FC, and ST34571FC)

Barracuda 9FC (ST19171FC)
Cheetah 4LP FC (ST34501FC)
Cheetah 9FC (ST19101FC)

the connection of Port A and B for these products must follow the requirements in their prod uct manu­als.

Subject to buffer availability, the Barracuda 50FC drives support:

• Concurrent port transfers—The drive suppor ts receiving transfers on both por ts at the same time when the
ports are on independent loops.

• Full duplex—The drive suppor ts sending FCP_Data, FC P_RSP, FCP_XFR_RDY and ELS transfers while
receiving frames on both ports.

Barracud a 50FC Pr oduct Manual, Rev. C 41

9.3 SCSI comm an ds suppo r ted

Table 14 lists the SCSI commands that ST150176FC dri ves support.

Table 14: Supported commands

Command code Supported Command name

00h
01h
03h

04h

07h
08h
0Ah
0Bh
12h

15h
16h

17h
18h
1Ah

Y
Y
Y
Y
Y
Y
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
N
Y
Y
Y

Test unit ready
Rezero unit
Request sense
Extended sense
Field pointer bytes
Actual retry count bytes
Format un i t [9 .3 .1 ]
Block format
Bytes from Index
Physical sector fo rm at
DPRY bi t supported
DCRT bit supported
STPF bit supported
IP bit supported
DSP bit supported
IMMED bit supported
VS (vendor speci fic)
Reassign blocks
Read
Write
Seek
Inquiry
Vital product data page (00h)
Unit serial number page (80h)
Implemented operating def. page (81h)
Firmware numbers page (C0h)
Date code page (C1h)
Jumper setti ngs page (C2h)
Device behavior page (C3h )
Mode select (same pages as Mode Sense command shown bel ow) [3]
Reserve
3rd party reserved
Extent reservation
Release
Copy
Mode sense
Unit attention page (00h)
Error recovery page (01h)

42 Barracuda 50FC Product Manual, Rev . C

Table 14: Supported commands

Command code Supported Command name

1Bh
1Ch

1Dh

25h
28h

2Ah

2Bh
2Eh

2Fh

30h
31h
32h
33h

Y
Y
Y
Y
Y
Y
N
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
Y
N
Y
Y
Y
Y
N
Y
Y
Y
N
N
N
N
N

(continued)

Disconnect/reconnect contro l (p age 02h) DTDC and DIMM not used
Format page (03h)
Rigid disc drive geometry page (04h)
Verify error recovery page (07h)
Caching parameters page (08h)
Control mode page (0Ah)
Notch and partition page (0Ch)
Xor control page (10h)
Fibre Channel Interface control page (19h)
Power control page (1Ah)
Information exception s control page (1Ch)
Start unit/stop unit (spindle ceases to rotate)
Receive diagnostic result s
Supported diagnostics pages (00h)
Translate page (40h)
Enclosure services page
Send diagnostics page
Supported diagnostics page (00h)
Translate page (40h)
Read capacity
Read extended
Disable page out
Force unit access
Relativ e address
Write extended
Disable page out
Force unit access
Relativ e address
Seek extended
Write and verify
Disable page out
Byte check
Relativ e address
Verify
Disable page out
Byte check
Relativ e address
Search data high
Search data equal
Search data low
Set limits

Barracud a 50FC Pr oduct Manual, Rev. C 43

Table 14: Supported commands

Command code Supported Command name

34h
35h
36h
37h
39h
3Ah
3Bh

3Ch

3Eh
3Fh
40h
41h

42-4Bh
4Ch

4Dh

N
Y
N
Y
N
N
Y
Y
Y
N
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
N
Y
N
Y
Y
N
N
N
Y
Y
Y
Y
Y
Y
Y
Y
Y

(continued)

Prefetch
Synchronize cache
Lock-unlock-cache
Read defect data
Compare
Copy and v eri fy
Write buffer
Write combined header and dat a m ode (0)
Write data mode (2)
Download microc ode m ode (4)
Download microcode and sav e mode s (5)
Download microc ode wit h off sets mode (6)
Download microc ode with offsets and save mode (7)
Firmware download option [2]
Read buffer
Read combined header and data mode (0)
Read data mode (2)
Read descriptor mode (3)
Read long
Write long
Change definition
Write same
PBdata
LBdata
Not used
Log Select
DU bit
DS bit
TSD bit
ETC bit
TMC bit
LP bit
Log Sense
Cache statistics page (37h)
Non-medium error page (06h)
Pages supported list (00h)
Power-on time page (3 Eh)
Read error counter page (03h)
S.M.A.R.T. status log page (2Fh)
S.M.A.R.T. attribute log page (30h)
Verify error counter page (05h)

44 Barracuda 50FC Product Manual, Rev . C

Table 14: Supported commands

Command code Supported Command name

4E-4Fh
50h
51h
52h
53-54h
55h

56h

57h
58-59h
5Ah
5B-5Dh
5E
5F
60-7Fh
80h
81h
82h
83-8Fh
C0-DFh
EO-FFh

Y
N
N
N
N
N
Y
Y
Y
Y
N
Y
N
Y
N
Y
Y
N
N
N
N
N
N
N

(continued)

Write error counter page (02h)
Not used
XD write
XP write
XD read
Not used
Mode Select (10) [3]
Capacity prog ramming
Reserved (10)
3rd party reserve
Extent reservation
Released (10)
Not used
Mode Sense (10) [3]
Not used
Persistent reserve in
Persistent reserve out
Not used
XD write extended
Rebuild
Regenerate
Not used
Not used
Not used

[1] Barracuda 50FC drives can format to any multiple of four bytes per logical block in the range 512 to 4,096

bytes.

Warning.

[2]

Power loss during flash programming can result in firmware corruption. This usually makes the

drive inoperable.

[3] Reference Mode Sense command 1Ah for mode pages supported.

Barracud a 50FC Pr oduct Manual, Rev. C 45

9.3.1 Inquiry data

Table 15 lists the Inquir y comm and data that t he drive should return t o the initiator per the forma t given in the
Fibre Channel Interface Manual.

Table 15:

Bytes Data (hex)

Barracuda 50FC

0-15 00 00 02*

*

inquiry data (ST150176FC data shown)

32

8B 00 PP 0A 53 45 41 47 41 54 45 20 Vendor

ID

16-31 [53 54 31 35 30 31 37 36 46 43] 20 20 20 20 20 20 Product

ID
32-47 R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00
48-63 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* *C opy-

right
112-

39* 39* 39* 20 53 65 61 67 61 74 65 20 41 6C 6C 20 notice

127
128-

72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20

143

* Copyright year (changes with actual year).
** 02 = SCSI-2 implemented with some SCSI-3 features (def ault).

PP 50 = Inquiry data fo r an Inq uiry command received on Port A.

70 = Inquiry data for an Inq uiry command received on Port B.
R# Four ASCII digits representing the last four digits of the product firmware version number.
S# Eight ASCII digits representing the eight digits of the product serial number.
[ ] Bytes 16 through 25 reflect drive model (ST150176FC shown).

9.3.2 Mode Sense d ata

The Mode Sense com ma nd prov ides a way for the drive to report its operating parameters 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 default values can be changed only by downloading a complete set of new firmware
into the flash E-PROM. An initiator can request an d receive from the drive a list of default values and use
those in a Mode Sel ect command 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 comma nd. 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 values storage.

When power is applied to the drive, it takes sav ed 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.

On drives requiring unique saved values, the required unique saved values are stored into the saved val­ues storage location on the m edia pri or to shippin g the drive. Some drives may have unique firmware with
unique default values also.

46 Barracuda 50FC Product Manual, Rev . C

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 change the values identified as changeable 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 , t hat 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 e xample, in Table 16, refer t o Mode page 81,
in the row entitled “CHG.” These are hex numbers representing the changeable 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 changeable. Note also that bytes 06, 07, and 09 are not chang eable, because those fields are all
zeros. In byte 02, hex v al ue 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 ones, 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 tota l 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 Fibre Channel Interface Manual).

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

Barracud a 50FC Pr oduct Manual, Rev. C 47

Table 16: Mode Sense data default and changeable values for ST150176FC drives

ST150176FC
Bytes

Mode
Sense
Header

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 05 D2

B0 3B

00 00 02 00

<------------------------------------------- Mode sense pages data ------------------------------------------->

DEF

81 0A C0 0B A8 00 00 00 05 00 FF FF

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

DEF 82 0E 80 80 00 00 00 00 00 00 01 A1 00 00 00 00

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

DEF 83 16 04 4C 00 00 00 02 00 00 01 71 02 00 00 01 00 48 00 38 40 00 00 00

CHG

83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DEF 84 16 00 2E F8 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1C 09 00 00

CHG

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

DEF 87 0A 00 0B A8 00 00 00 00 00 FF FF

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

DEF 88 12 14 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 F1 08 00 00 00 00 00 00 00

DEF 99 06 00 00 00 00 00 00

CHG 99 06 00 FF 01 00 00 00

DEF 9A 0A 00 03 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 00 00 00 00 00 00 00 00 01

CHG 9C 0A 8D 0F FF FF FF FF FF FF FF FF

DEF 80 02 00 00

CHG 80 02 37 40

<--- Read capacity data --->

05 D2 B0 3A 00 00 02 00

48 Barracuda 50FC Product Manual, Rev . C

9.4 Miscellaneous operating features and conditions

Table 17 lists various features and conditions. A “Y” in the suppor t column indicates the feature or condition is
support ed. An “N” in the support column indicates the feature or condition is not supported.

Table 17: Miscellaneous features

Supported Feature or condition

Y
Y
N
N
Y
N
Y
Y
Y
Y
N
Y

Table 18: Miscellaneous status

Supported Status

Y
Y
Y
Y
Y
Y
Y
Y
Y
Y

FC-AL selective reset
Automatic contingent allegiance
Asynchronous event notific ati on
Synchronized (locked) spindle operation
Segmented caching
Zero latency read
Queue tagging (up to 128 queue t ags supported)
Deferred er ror handling
Parameter rounding (controlled by Round bit in Mode Select page 0)
Reporting actual retry count in Extended Sense bytes 15, 16, and 17
Adaptive caching
SMP = 1 in Mode Select command needed to save RPL and rotational off set bytes

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

9.5 FC-AL physical interface

Figure 12 shows the location of the J1 Fibre Channel si ngle conn ec tion attachm ent (FC-S CA) a nd the J 6 con­nector. Figure 14 provides the dimensions of the FC-SCA. Figure 15 provides the dimensions of the J6 connec­tor.

Barracud a 50FC Pr oduct Manual, Rev. C 49

Details of the physical, electrical, an d logical character istics are provided within this section. The op erational
aspects of Seagate’s Fibre Channel drives are provided in the Fibre Channel Interface Manual..

J6

Figure 12. Physical interface

9.5.1 Physical characteristics

This section defines physical interface connector.

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 of 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 obtain valid
addresses.

Port bypass circuits (PBCs) allow devices to be insert ed into unpop ulated loc ations or removed from the loop
with loop operation recovery after a brief interrupt ion. These PBCs are located external to th e FC-AL device.
Figure 13 shows the relationship between the PBC and FC-AL device.

Port Bypass

Circuit

From Previous

Port Bypass

Circuit N–1

Drive N–1

Drive

MUX

Select

SerialInSerial

Drive N

Out

To Next

Drive

Port Bypass

Circuit N+1

Drive N+1

Figure 13. Port bypass circuit physical interconnect

50 Barracuda 50FC Product Manual, Rev . C

9.5.2 Connector requirements

Recommended mating SCA part number:

Part description Positions Part number Features

AMP Vertical (SCA sequence) 40 787317-1
Berg 40 71781
Methode 40 512-220-91-101N
Molex 40 717431040

With polarization
With polarization
With polarization
With polarization

The FC-AL SCA device connector is illu strated in Figur e 14. The J6 connect or is illustrate d in Figure 15.

1.618 ± .003 in

(41.1 ± 0.08 mm)

Pin 20

Pin 40

.64 in

(16.24 mm)

1.28 in

(32.47 mm)

1.618 ± .003 in

(41.10 ± 0.08 mm)

1.492 ± .009 in

(37.90 ± 0.24 mm)

Mating end Housing

Pin 1

Pin 21

0.264+.007 in
–.010 in

(6.71+0.18 mm)

(–0.25 mm)

0.197 ± .003 in

(5.00 ± .08 mm)

0.226 in

(6.50 mm)

2 places

min.

0.394 ± .004 in

(10.0 ± 0.10 mm)

0.039 in

(0.75 mm)

min.

0.024 in

(0.60 mm)

0.079 ± .010 in
(2.00 ± .25 mm)

(initial point

of contact)

min.

.05 in

(1.27 mm)

typ.

Contact (typ.)

.025 in (0.635 mm)

Figure 14. FC-AL SCA device connector dimensions

.079 (2 mm)

.079

(2 mm)

(17.983 mm)

Figure 15. J6 connector dimensions

.787

(19.99 mm)

J6

.708

0.106 ± .010 in

(2.70 ± 0.25 mm)

0.060 ± .010 in

(1.52 ± 0.25 mm)

0.051 ± .006 in

(1.30 ± 0.16 mm)

2 places

Barracud a 50FC Pr oduct Manual, Rev. C 51

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

• Enclosure Services interface

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

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 19: FC-SCA pin descriptions

Pin Signal name Signal type Pin Signal name Signal type

1* -EN bypass port A TTL outp ut 21 12 Volts charge
2* 12 Volts 22 Ground
3* 12 Volts 23 Ground
4* 12 Volts 24* +Port A_in Diff. PECL input pai r
5* -Par allel ESI 25* -Port A_in
6* Ground
7* Active LED out Open co llector ou t 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 pair
11* -EN bypass port B TTL output 31* -Port A_out
12* SEL_6 TTL input/output 32 Ground
13* SEL_5 TTL input/output 33* +Port B_out Diff PECL output pair
14* SEL_4 TTL input 34* -Port B_out
15* SEL_3 TTL input/output 35 Ground
16* Fault LED out Open collector out 36 SEL_2 TTL input/output
17* Reserved NC 37 SEL_1 TTL input/output
18* Reserved NC 38 SEL_0 TTL input/output
19* 5 Volts 39 Reserved NC
20* 5 Volts 40 5 Volts char ge

[9.3.1]

26 Ground

*Short pins in mating backpanel connect or.
[1] This pin may be connected to external logic to detect the presence of the dr ive. The drive connects this

pin to the common ground.

52 Barracuda 50FC Product Manual, Rev . C

9.5.5 FC-AL transmitters and receivers

A typical FC-AL differential copper transmitter and receiver pair is shown in Figure 16. The receiver is required
to provide the AC coupling to eliminate ground shift noise.

68

TX

Transmitter

TY

150

Figure 16. FC-AL transmitters and receivers

150

68

Differential

Transfer Medium

.01µf

150

.01µf

RX

Receiver

RY

9.5.6 Power

Power is supplied through the FC -SCA with suppor t 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 provide +12 volt power to the drive . The current return for the +12 volt power supply is t hrough
the common ground pins. The sup ply current and return current must be distributed as evenly as possible
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. Distribute supply and return current as evenly as possible am ong the v ol tage and g round
pins.

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 appropr iate current-limiting resistor. The 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 20.

Table 20: Active LED Out conditions

Normal command activity LED status

Spun down and no activity Slow blink (20% on and 80% off a 2 sec cycle)
Spun down and activity (command executing) On
Spun up and no activity On
Spun up and activity (comm and executing) Off
Spinning up or down Blinks steadily (50% on and 50% off)
Format in progre ss, each cylinder change Toggles on/off

Barracud a 50FC Pr oduct Manual, Rev. C 53

The Active 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 current limiting resistor. The LED and the current limiting resistor are
external to the drive.

9.5.9 Enable port bypass signals

The – Enable Bypass Port A (– EN BYP Port A ) a n d – Enable Bypass Port B (– EN BYP Port B) signals 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 the
associated por t. When an Enable Bypass s ignal is active, the corresponding Port Bypass LED signal i n con­nector J1 is driven low by the disc drive. A pull down resistor, 1K, located with the PBC should be used t o
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 Por t
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.

Fail ure 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

9.5.10 Motor start controls

The dr ive’s motor is started according to the St art_1 and Star t_2 signals d escribed in Table 21. The state of
these signals can be wired into the backplane socket or driven by logic on the backplane.

Table 21: Motor start control signals

Case Start_2 Start_1 Motor spin function

1 Low L ow Moto r spi ns up at DC power on.
2 High Low Motor spins up only when SCSI Start command is received.
3 Low High Motor spins up aft er a delay of 12 seconds times the modulo 8 va lue of

the numeric SEL ID of the drive fro m DC power on.

4 High High The drive will not spin up.

9.5.11 SEL_6 through SEL_0 ID lines

The SEL_6 through SEL_0 ID line s deter mine dr ive address, and, optionally, for an Enclosure Ser vices Inter­face. When the Parall el ESI line is high, the enclosure backpanel must provide address information on the SEL
line. Refer to table 22 for a mapping of SEL to FC-A L physical addresses (AL_PA ). You can think of the S EL
lines as the equivalent of a backpanel logic plug. The drives does not provide pull up resistors on these l ines.
The backpanel is required to provide high and low inputs to the SEL_ID lines per the s pecificat ions i n t able 23
on page 56.

Note.

Table 22 gives AL_PA values for each SEL value. The first entry in the t able is SEL_ID 00. The last
entry is SEL_ID 7D . SEL_ID 7E is AL_PA 00 which is not valid for an NL_Port, so is not included in the
table. Also, SEL_ID 7Fh does map to a valid AL_PA; however, this value signals the drive that physical
addresses are not being assigned using the SEL lines and that a “soft” address will be determined by
FC-AL loop initialization.

When the Parallel ESI line is low, the enclosure backpanel logic switches to E SI mode if supported. There are
two modes of ESI, seven bits of enclosure statu s and a bidirectional mode. ESI suppo rt and the mode are
determined by the drive using a di scovery process. Refer to the Fibre Channel Interface Manual for a descrip­tion of ESI operation.

54 Barracuda 50FC Product Manual, Rev . C

9.5.11.1 Parallel Enclosure Services Interface (ESI)

The parallel ESI line is an output from the drive. This line provides the enclosure wi th an indication of the
present function of the SE L lines. A high level, the default state, indicates the dr ive requires address informa­tion on the SEL lines. A low level indicates the drive is attempting an ESI transfer. The enclosure may not sup­port ESI on any or all drive locations. It may only support the address function. Support of ESI is discovered by
the drive. Refer to the Fibre Channel Interface Manual for a description of ESI operations.

Barracud a 50FC Pr oduct Manual, Rev. C 55

Table 22: Arbitrated lo op physical addre ss (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

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

56 Barracuda 50FC Product Manual, Rev . C

9.6 Signal characteristics

This section describ es the electr i cal signal characteristics of the drive’s input and output signals. See Table 19
on page 51 for signal type and signal name information.

9.6.1 TTL input characteristics

Table 23 provides the TTL characteristics.

Table 23: TTL characte ristics

State Voltage Current

Input high 1.9 < V
Input low -0.5V < V
Output high (-EN Bypass A, B) 2.4 < V
Output low (-EN Bypass A, B) V
Output high (-Parallel ESI) 2.4 V

VOH > 0.9V
Output low (-Parallel ESI) 0 < V
Output high (all other outputs) 2.4 V

VOH > 0.9V
Output low (all oth er out puts) 0 < V

< 5.5V IIH = ±500nA max.

IH

< 0.9V IOL = ±500nA max.

IL

< 5.25V IOH < -3mA

OH

< 0.5V IOL < 3mA

OL

< V

CC

OH

CC

< .45V IOL < 2.4mA

OL

< V

CC

OH

CC

< .45V IOL < 1.6mA

OL

IOH < -2.4mA

< -500µA

I

OH

IOH < -1.6mA
I

< -500µA

OH

9.6.2 LED driver signals

Fault and Active LED signals are located in the FC-SCA co nnector (J1) and through the indicator connector
(J6). See Table 24 for the output characteristics of the LED drive signals.

Table 24: LED drive signal

State Current drive a vailable Output voltage

LED off, hig h 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 25. 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.

Table 25: Different ial PECL output characteristics

Description Parameter Notes

Serial output vol tage swing 300 < V

< 650 mV Centered at 1.32V

out

Barracud a 50FC Pr oduct Manual, Rev. C 57

Figure 17 provides the data output valid eye diagram relative to the bit cell time.

941 ps

Vout (mv)

800 ps

Figure 17. Transmit eye diagram

9.6.4 Di f fe rential PECL inp ut

The serial PECL input signal voltage characteristics are provided in Table 26.

Table 26: Different ial PECL input characteristics

Description Parameter Notes

Serial input voltage swing 200mV < V

< 1300 mV AC coupled

in

Figure 18 provides the data valid eye diagram for typical and minimum requirements to recover data at the
specified interface error rate. The inputs are AC coupled on the drive.

941 ps

Vin (mv)

659 ps
376 ps

Figure 18. Receive eye diagram

Typical
Minimum

Barracud a 50FC Pr oduct Manual, Rev. C 59

10.0 Seagate Technology support services Online Services

Internet

For online inf ormation about Seagate products, visit www .seagate.com or e-mail your disc or tape questions to:

Presales Support:

Disc:http://www.seagate.com/support/email/email_presales.shtml or DiscPresales@Seagat e.com
Tape:http://www.seagate.com/support/email/email_tape_presales.shtml or

Tape_Sales_S uppor [e-mail]

Technical Support:

Disc:http://www.seagate.com/support/email/email_disc_support.shtml or DiscSuppor t@ Seagat e.com
Tape:http://www.seagate.com/support/email/email_tape_support.shtml or [e-mail]

®

is a computer bulletin board system that contains information about Seagate disc and tape drive

SeaBOARD

products and is availabl e 24 hours daily. Set your communications software to eight data bits, no parity and one
stop bit (8-N-1). This service is available worldwide.

Automated Se rvices

SeaFONE® (1-800-SEAGATE)

help services. Using a touch-tone phone, you can find answers to service phone numbers, commonly asked
questions, troubleshooting tips and specifications for disc drives and ta pe drives 24 hours daily. Internationa l
callers can reach this service by dialing [phone].

®

SeaFAX

support information by return FAX 24 hours daily. This service is available worldwide.

is Seagate's automated FAX delivery system. Using a touch-tone phone, you can obtain technical

is Seagate's toll-free number (1-800-73 2-4283) to access our au tomated self-

Presales Support

Our Presales Suppo rt staff can help you deter mine which Seagate products a re best suited for your specific
application or computer system.

Seagate Express

You can purchase select tape produc ts and tape accessories throu gh S eaga te Express 24 hours daily by call­ing 1-800-531-0968 or by faxing your order to: [phone].

Technical Support

If you need help installing your drive, consult your dealer. Dealers are familiar with their unique system configu­rations and can help you with system conflicts and ot her technical issues. If you need a dditional hel p, you can
talk to a Sea gate technical supp ort spec ialist. Before calling, n ote your system configuration and dr ive model
number (ST####).

SeaTDD™([phone])

comments 24 hours dai ly and exchange messages with a te chnical sup port specialist from 8:00 A.M. to 12:15
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is a telecommunications device for the deaf (TDD). You can s end questions or

Customer Service (CSO)

Warranty Repair

Seagate offers worldwide customer support for Seagate drives. Seagate direct OEM, Distribution and System
Integrator customers should contact their Seagate service center representative for warranty information.
Other customers should contact their place of purchase.

Au thoriz ed Service Ce nters

If you live outside the US, you can contact an Authorized Service Center for service or repair.

60 Barracuda 50FC Product Manual, Rev . C

USA/Canada/Latin America Support Services

Presales Support

Disc:1-877-271-3285 or [phone]FAX: [phone]
Tape:1-800-626-6637 or [phone]FAX: [phone]

Technical Support (SeaFONE)

1-800-SEAGATE or [phone] (for specific product phone number)
FAX: Disc: [phone]; Tape: [phone]

SeaFAX
SeaTDD
SeaBOARD

1-800-SEAGATE

[phone]

Disc: [phone]; Tape: [phone]

Warranty Repair

USA1-800-468-347 2FAX: [phone]
Mexico and Latin America+1-405-949-7758FAX: [phone]

Au thoriz ed Service Ce nters

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MA Inf o rmatica[phone]FAX: [phone]

Canada

Memofix
Adtech*[phone] or 1-800-624-9857FAX: [phone]

1

[phone]FAX: [phone]

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For European customer support, dial the toll-free number for your specific country for presales support, techni­cal support, SeaF AX and warranty repair.

A.M

If your country is not listed here, dial our European call center at [phone] from 8:30
(European central time) Monday through Friday. The European cal l center is locat ed in Amst erdam , The Net h­erlands.

Call Center

. to 5:00 P.M.

Austria0 800-20 12 90
Belgium0 800-74 876
Denmark80 88 12 66
France0 800-90 90 52
Germany0 800-182 6831
Ireland1 800-55 21 22
Italy1 677 90 695
Netherlands0 800-732 4283
Norway800-113 91
Poland00 800-311 12 38
Spain900-98 31 24
Sweden0 207 90 073
Switzerland0 800-83 84 11
Turkey00 800-31 92 91 40
United Kingdom0 800-783 5177

SeaBOARD

Germany+49-89-1409331

1.Authorized Service Centers

Barracud a 50FC Pr oduct Manual, Rev. C 61

Fax Services—All European Countries

Presales/Technical Support/Warranty Repair 31-20-653-3513

Africa/Middle East Support Services

For presales, technical support, warranty repair and FAX services in Afr ica and the M iddle East , dial our Euro­pean call center at [phone] from 8:30 a. m. to 5:00 p.m. (European central time) Monday through Fri­day, or send a FAX to [phone]. The European call center is located in Amsterdam, The Netherlands.

Asia/Pac ific Supp ort Services

Technical Support

Australia+61-2-9725-3366FAX: [phone]
Hong Kong+852-2368 9918FAX: [phone]
Japan—F AX: [phone]
Singapore+65-488-7584FAX: [phone]
Taiwan+886-2-2514-2237FAX: [phone]

SeaFAX

Australia+61-2-9756-5170

Warranty Repair

Japan+81-3-5462-2904FAX: [phone]
Asia/Pacific and Australia+65-485-3595FAX: [phone]

Barracud a 50FC Pr oduct Manual, Rev. C 63

Index

Numerics

12 volt

pins 52
3rd party reserve command 44
5 volt pins 52

A

Abort Sequence (ABTS) 35
abort task set function 35
AC coupling 52
AC power requirements 19
ACA active status 48
ACA active, faulted initiator status 48
Accept (ACC) 35
acoustics 26
active LED Out signal 52
Actual retry count bytes command 41
actuator 7

assembly design 5
adaptive caching 48
Address Discovery (ADISC) 35
addresses 49
air cleanliness 26
air flow 22, 33

illustrated 33
air inlet 33
Alternate credit model 36, 39
altitude 24
ambient 23
ambient temperature 22, 32
ANSI documents

fibre channel 4

SCSI 4
arbitrated loop physical address (AL_PA) 31
arbitration 31
asynchronous event notification 48
audible noise 3
auto write and read reallocation

programmable 6
automatic contingent allegiance 48
average idle current 19
average rotational latency 9

B

backpanel 51
backplane 53
basic link service frames 35
Basic_Accept (BA_ACC) 35
Basic_Reject (BA_ RJT ) 35
BB 36, 39
BB-Credit 36, 39
Block format command 41
buffer

data 6

space 10
busy status 48
bypass circuit 15
Byte check command 42
Bytes from Index command 41
bytes per surface 9
bytes per track 9

C

cache operation 10
cache segments 11
Cache statistics page 43
Caching parameters page (08h) command 42
caching write data 11
Canadian Department of Communications 3
capacity

formatted 7

unformatted 7, 9
Capacity programming 44
case temperature 22
CF 36, 39
Change definition command 43
character sync 15
charge pins 52
check condition status 48
Class 3 parameters 36, 39
class B limit 3
Class valid 36, 39
clear AC A fun c ti on 35
clear ta sk se t fu nctio n 35
commands supported 41
Common features 36, 39
Compare command 43
Concurrent sequences 37
condensation 24
condition met/good status 48
connector

illustrated 50

requirements 50
continuous vibration 26
Continuously increasing offset 36, 39
Control mode page (0Ah) command 42
cooling 32
Copy and verify command 43
Copy command 41
CRC 15

error 13
CS 37
Current profiles 20
customer service 17

D

data block size

modifing the 7
data buffer to/from disc media 9
data heads

64 Barracuda 50FC Product Manual, Rev . C

read/write 9

data rate

internal 9
data transfer rate 9
data valid eye 57
Date code page command 41
DC power 51

requirements 19
DCRT bit 41
defect and error management 29
deferred error handling 48
description 5
Device behavior page 41
device selection IDs 31
devices 31
differential PECL input 57
dimensions 27
Disable page out command 42
disc rotation speed 9
Disconnect/reconnect control (page 02h) command

42
Download microcode and save modes (5) 43
Download microcode mode (4) 43
Download microcode with offsets and save mode (7)

43
Download microcode with offsets mode (6) 43
DPRY bit 41
drive 26
drive active LED connection 31
drive characteristics 9
drive fault LED connection 31
drive ID 31
drive ID/option select headers 31
drive mounting 27, 33
drive orientation 32
drive select 51
driver signals 56
drivers and receivers 6
DS bit 43
DSP bit 41
DU bit 43
dual port support 40

E

electrical

description of connector 51
signal characteristics 56

specifications 19
electromagnetic compatibility 3
electromagnetic interference (EMI) 13
electromagnetic susceptibility 26
EMI 13
EMI requirements 3
enable bypass

port A 53

port B 53

signal 53

state 15
Enclosure Services interface 51
Enclosure services page command 42
environment 33
environmental

int erf erence 13

limits 22

requirements 13
environmental control 26
error

detection mechanisms, FC 15

management 29

rates 13
error correction code

96-bit Reed-Solomon 6
Error recovery page (01h) command 41
ETC bit 43
extended link service

frames 35

reply frames 35
Extended sense command 41
Extent reservation command 44

F

fabric 39
Fabric Address Notification (FAN) 35
Fabric Login (FLOGI) 35
FAN 39
fault LED out signal 52
FC-AL

document 4

int erf ace 31, 51

options supported 40

physical interface 48

SCA device connector, illustrated 50

selective reset 48
FCC rules and regulations 3
FCP

for SCSI, document 4

response codes 35

task management functions 35
FC-PH document 4
features 6

int erf ace 35
Fibre Channel documents 4
Fibre Channel Interface control page 42
Fibre Channel Interface Manual 1, 4
Fibre Channel Services 35
Field pointer bytes command 41
firmware 6

corruption 44
Firmware download option command 43
Firmware numbers page command 41
flawed sector reallocation 6
FLOGI

received on Port A 38

received on Port B 38

Barracud a 50FC Pr oduct Manual, Rev. C 65

Force unit access command 42
form fa ctor 6
format 31
Format command execution time 9
Format page (03h) command 42
Format unit command 41
FS 36, 37, 39
function

complete, code 00 35
not supported, code 05 35
reject, code 04 35

G

Good status 48
gradient 23, 24
ground shift noise 52
grounding 34

H

hard assigned arbitrated loop physical address

(AL_PA) 31

HDA 23, 33, 34

temperature 23
head and disc assembly (HDA) 5
head and disc assembly. See HDA
heads

read/write data 9
heat removal 33
heat source 33
host equipment 34
hot plugging the drive 15
humidity 24
humidity limits 22

I

IC 36
ID and configuration options 6
IMMED bit 41
Implemented operating def. page command 41
Information exceptions control page (1Ch) command

42
Initiator control 36
Inquiry command 41
inquiry data 45
installation 31

guide 4

interface 31

commands supported 41
description 49
error rate 13
errors 13
illustrated 49
physical 48
requirements 35

interleave 6

minimum 9

intermediate/condition met/good status 48
intermediate/good status 48
Intermix 36, 39
internal data rate 9
internal defects/errors 29
internal drive characteristics 9
IP bit 41

J

J1 connector 31
J6 connector 31, 32
Jumper settings page command 41
jumpers 31

L

latency

average rotational 9, 10
LBdata 43
LED driver signals 56
Link Service Reject (LS_RJT) 35
link services supported 35
Lock-unlock-cache command 43
Log select command 43
Log sense command 43
logic power 52
logical block address 10
logical block reallocation scheme 6
logical block si ze 6, 10
logical segments 10
Logout (LOGO) 35
loop 49, 53

disruption 15

initializ ati o n 31
loop position

FC-AL options 40
loop position report

FC-AL options 40
LP bit 43
LS_RJT 36, 39
LSI circuitry 6

M

maintenance 13
maximum delayed motor start 19
maximum start current 19
mean time between failure (MTBF) 14
media description 6
minimum sector interleave 9
miscellaneous feature support

Adaptive caching 48

Asynchronous event notification 48

Automatic contingent allegiance 48

Deferred error handling 48

FC-AL selective reset 48

Parameter rounding 48

Queue tagging 48

66 Barracuda 50FC Product Manual, Rev . C

Reporting actual retry count 48
Segmented caching 48
SMP = 1 in Mode Select command 48
Synchronized (locked) spindle operation 48
Zero latency read 48

miscellaneous status support

ACA active 48
ACA active, faulted initiator 48
Busy 48
Check condition 48
Condition met/good 48
Good 48
Intermediate/condition met/good 48
Intermediate/good 48
Reservation conflict 48

Task set ful l 48
miscorrected media data 13
Mode select

(10) command 44

command 41
Mode sense

(10) command 44

command 41

data, table 45, 47
monitoring state 15
motor star t

controls 53

option 10
mounting 33

holes 33

orientations 32
mounting configuration 27
mounting configuration dimensions 27
MTBF 13, 14, 22

defined 14

N

N_Port Login (PLOGI) 35

payload 36

payload values 37
NN 36, 39
Node Name 39
Node name 36
noise

audible 3
noise immunity 20
Non-medium error page 43
non-operating 24, 26

temperature 23
non-operating vibration 26
Notch and partition page 42

O

office environment 26
old port state

FC-AL options 40
OPEN Full Duplex

FC-AL options 40

OPEN half duplex

FC-AL options 40
Open sequences per exchange 37
operating 24, 26
option configurations 31
option selection 51
options 7, 40
orientation 24
OS 37
out-of-plane distortion 33
overhead time

for head switch 10

for one track cylinder switch 10

P

P_LOGI

received on Port A 37

received on Port B 37
package size 25
packaged 25
Pages supported list 43
parameter rounding 48
pass-through state 15
PBC 49, 53
PBdata 43
PCB

tem peratur e 23
PCBA 34
peak bits per inch 9
peak operating current 19
peak-to-peak measurements 20
PECL input 57
performance characteristics

detailed 9

general 9
performance degradation 24
performance highlights 6
physical damage 26
physical interface 48

description 49
Physical sector format command 41
physical specifications 19
PI 37, 38
pin descriptions 51
PN 36, 39
port bypass circuit 15, 49, 53
port bypass LED connection 31
Port DISCovery 36
Port Discovery (PDISC) 35
port identifier field 37, 38
port login 36

accept 37
Port Name 39
Port name (initiator’s) 36
power 52

dissipation 22

Barracud a 50FC Pr oduct Manual, Rev. C 67

requirements, AC 19
requirements, DC 19

sequencing 20
Power control page (1Ah) command 42
power distribution 3
Power-on time page 43
Prefetch command 43
prefetch/multi-segmented cache control 10
preventive maintenance 13
printed circuit board (PCB)

cooling 32
private loop

FC-AL options 40
Proc Assc 36
Process Accept (ACC) 38
Process Login (PRLI) 35, 37
Process Login Accept (ACC) payload 38
process login payload data 37
Process Logout (PRLO) 35
public loop

FC-AL options 40
pull down resistor 53

Q

queue tagging 48

R

radio interference regulations 3
Random relative offset 36, 39
RCD bit 10
Read buffer command 43
Read capacity command 42
Read combined header and data mode (0) 43
Read command 41
Read data mode (2) 43
Read defect data command 43
Read descriptor mode (3) 43
Read error counter page 43
read error rates 13
Read extended command 42
Read Link Status (RLS) 35
Read long command 43
read/write data heads 9
Reassign blocks command 41
Receive buffer field size 36, 39
receive buffer field size 37
Receive diagnostic results command 42
receive eye

diagram 57
receivers 52
recommended mounting 25
recovered media data 13
reference

documents 4
Regenerate command 44
Register FC-4 Types (RFT_ID) 35
Relative address command 42

relative h umidity 24
Rel ease c ommand 41
Released (10) command 44
reliabilit y 6

and service 14

specifications 13
repair and return information 17
reporting actual retry count 48
Request sense command 41
reservation conflict status 48
Reserve command 41
Reserved (10) command 44
resonance 24
return information 17
Rezero unit command 41
Rigid disc drive geometry page

command 42
rotation speed 9
running disparity 15

S

S.M.A.R.T. attribute log page 43
S.M.A.R.T. status log page 43
safe ty 3
SCA part numbers 50
SCSI interface

commands supported 41
SCSI Interface Product Manual 3
Search data

equal command 42

high command 42

low command 42
Seek command 41
seek error

defined 13

rate 13
Seek extended command 42
seek performance characteristics 9
seek time

average typical 9

full st roke typica l 9

single track typical 9
segmented caching 48
SEL ID 31

lines 53

standard feature 6
Self-Monitoring Analysis and Reporting Technology

7, 16
Send diagnostics page command 42
Sequential delivery 36, 39
service

life 13, 15
philosophy 15

tools 15
Service Options 39
Servic e options 36
Set limits command 42

68 Barracuda 50FC Product Manual, Rev . C

shieldin g 3
shipping 17
shipping container 23
shock 24

and vibration 24
shock mount 34
signal

characteristics 56

LED driver 56
single-unit sh i p pin g pack kit 7
SMART 7, 16
SMP = 1 in Mode Select command 48
SO 36, 39
spindle brake 6
Stacked connection req. 36, 39
standards 3
Start unit/stop unit command 42
start/stop time 10
STPF bit 41
support services 59
Supported diagnostics pages command 42
surface stiffness

allowable for non-flat surface 33
switches 31
Synchronize cache command 43
synchronized spindle

operation 48
system chassis 34

tracks per inch 9
tracks per surface 9
Translate page command 42
transmit eye diagram 57
transmitters 52
transporting the drive 17
TSD bit 43
TTL input characteristics 56

U

UI 37, 38
unique identifier 37, 38
Unit attention page (00h) command 41
Unit serial number page command 41
unrecoverable

error 13
write error, defined 13

unrecovered media data 13

V

Valid version level 36, 39
Verify command 42
Verify error counter page 43
Verify error recovery page (07h) command 42
vibration 24, 26
Vital product data page command 41
VS 41

T

target reset function 35
task management functions 35

Abor t task s e t 35

Clear ACA 35

Clear task set 35

Target reset 35

termi n ate ta sk 35
task management response codes 35

Function complete 00 35

Function not supported 05 35

Function reject 04 35
task set ful l statu s 4 8
technical support services 59
temperature 22, 33

ambient 22

case 22

gradient 22

limits 22

non-operating 23

PCB and HDA 23

regulation 3

See also cooling
termi n ate ta sk fun c ti on 35
terminators 31
Test unit ready command 41
Third-party Process Logout (TRPLO) 35
TMC bit 43

W

warranty 17
word sync 15
Write and verify command 42
Write buffer command 43
Write combined header and data mode (0) 43
Write command 41
Write data mode (2) 43
Write error counter page 44
write errors 13
Write extended command 42
Write long command 43
Write same command 43

X

XD read 44
XD write 44
XD write extended command 44
XID reassign 36
Xor control page 42
XP write 44

Z

zero latency read 48
zone bit recording (ZBR) 6

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

Publication Number: 83329473, Rev. C, Printed in USA