seagate Barracuda 180FC Product Manual

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Barracuda 180FC Disc Drive

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ST1181677FC/FCV

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Product Manual, Volume 1

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Barracuda 180FC Disc Drive

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ST1181677FC/FCV

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Product Manual, Volume 1

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© 2001 Seagate Technology LLC All rights reserved
July 2001

Publication number: 100107693, Rev. A

Seagate, Seagate Te chnology, and the Seagate logo are regi stered trademarks of Seagate Te chnology LLC.
Barracuda, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either registered trademar ks or trademar ks of
Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners.

Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publica-

tion may be reproduced in any form without written permission of Seagate Technology LLC.

Printed in the United States of America

Revision status summary sheet

Revision Date Writer/Engineer Sheets Affected

A 07/05/2001 L. Newman/J. Nowitzke 1/1, v thru viii, 1 thru 68.

Notice.
Product Manual 100107693 is Volume 1 of a two volume document with the SCSI Interface information

in the SCSI Interface Product Manual, part number 75789509.
If you need the SCSI Interface information, order the SCSI Interface Product Manual, part number

75789509.

Barracuda 180FC Product Manual, Rev. A v

Contents

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

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

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

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

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

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

3.0 General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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

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

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

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

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

4.5.3 Optimizing cache performance for desktop and server applications . . . . . . . . . . . 12

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

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

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

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

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

5.2 Reliability and service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.1 Mean time between failure (MTBF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.2 Preventive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.3 Service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.4 Service philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.5 Service tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.2.6 Hot plugging the drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.7 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2.8 Drive Self Test (DST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.9 Product warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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

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

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

6.2.1 Conducted noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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

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

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

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

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

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

vi Barracuda 180FC Product Manual, Rev. A

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

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

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

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

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

9.0 Interface requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

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

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

9.1.2 Fibre Channel task management functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

9.1.3 Fibre Channel task management responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

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

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

9.1.6 Fibre Channel Process Login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

9.1.7 Fibre Channel Process Login Accept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

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 conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

9.5 FC-AL physical interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

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

9.5.2 Connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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 signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

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

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

9.5.12 Device control codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

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

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

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

9.6.3 Differential PECL output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

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

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

Barracuda 180FC Product Manual, Rev. A vii

List of Figures

Figure 1. Barracuda 180FC family disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Barracuda 180FC disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3. Typical ST1181677FC drive +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 4. Typical ST1181677FC drive +5V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 5. ST1181677FC DC current and power vs. input/output operations per second . . . . . . . . . . . 22

Figure 6. Location of the HDA Temperature check point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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

Barracuda 180FC Product Manual, Rev. A 1

1.0 Scope

This manual describes Seagate Technology® LLC, Barracuda 180FC (Fibre Channel) disc drives.
Barracuda 180FC dr ives support the Fibre Ch annel Arbitrated Loop an d SCSI Fibre C hannel Proto col spec ifi-

cations to the extent describe d in this manual. The Fibre Channel In terface Manual (part number 77767496)
describes the ge neral Fibre Channel Arbitrated Loop character istics of t his and othe r Seagate Fibre Channel
drives.

Figure 1. Barracuda 180FC family disc drive

2 Barracuda 180FC Product Manual, Rev. A

Barracuda 180FC Product Manual, Rev. A 3

2.0 Applicable standards and reference documentation

The drive has been developed as a system peripheral to the highest standards of design and construction. The
drive depends upon i ts host equip ment to provide adequ ate power and environment i n order to achieve opti­mum performance and compli ance with applicable industry and governm ental regulations. Special attention
must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regu­lation. In particular, the drive must be secur e ly mounted in order to guara ntee the s pec if ied per for ma nc e char ­acteristics. Mounting by bottom holes must meet the requirements of Section 8.5.

2.1 Standards

The Barracuda 180FC family complies with Seagate sta ndards as noted in the approp riate sections of this
manual and the Seagate Fibre Channel Interface Manual, part number 77767496.

The Barracuda 180FC disc drive is a UL recognized 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 designed for system integration and installation into a suitable enclosure prior to use.
As such the drive is suppli ed as a subassembly and is not su bject to Subpar t 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 req uirements in their syst em. Shielded I/O
cables may be required if the e nclosure does not provide ad equate sh ielding. If the I/O c ables are externa l 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 per formance requ irements. It is
the responsibility of tho se integrating the dr ive within their sy stem s to perform thos e tests req uired and design
their system to ensu re that equipment operating in the sam e system as the drive or external to the s ystem
does not adversely affect the performance of the drive. See Section 5.1.1 and T ab le 1, DC power requirements.

2.1.2 Electromagnetic compliance

Seagate uses an indep endent laborator y to confir m compliance wi th the directives/standar ds 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:

• Typical current use microprocessor

• 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 i ntegrator shall confir m EMC complian ce
and provide the appropriate marking for their product.

Electromagnetic compliance for the European Union

If this model has the CE Marki ng it complies with the European Union requirem ents of the Electromagnetic
Compatibility Direc tive 89/336/EEC o f 03 May 1989 as ame nded by Direct ive 92/31/EE C of 28 Ap r il 1992 an d
Directive 93/68/EEC of 22 July 1993.

4 Barracuda 180FC Product Manual, Rev. A

Australian C-Tick

If this model has the C-Tick Markin g it complies with the Australia/New Zea land Standard A S/NZS3548 199 5
and meets the Electro magnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Man­agement Agency (SMA).

Korean MIC

If this model has the Korean Ministry of Information and Communication (MIC) logo, it complies with paragraph
1 of Articl e 11 of the Ele ctromagneti c Compatib ility (EM C) Control Regu lation and meets th e Electroma gnetic
Compatibility Framework requirements of the Radi o Research Laboratory (RRL) Minis try of Information and
Communication Republic of Korea.

Taiwanese BSMI

If this model has two Chinese words meani ng “EMC cer ti fication ” followed by an eight digit identification num­ber, as a Marking, it complies with Chinese Na tional Standard (CNS) 13438 and meets the Electromagnetic
Compatibility (EMC) Framework requirements of the Taiwanese Bureau of Standa rds, Metrology, and Inspec­tion (BSMI).

2.2 Reference documents

Barracuda 180FC Installation Guide

Seagate part number: 100107697

Fibre Channel Interface Manual

Seagate part 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

Specification for Acoustic Test Requirement and Procedures

Seagate part number: 30553-001

Package Test Specification Seagate P/N 30190-001 (under 100 lb.)
Package Test Specification Seagate P/N 30191-001 (over 100 lb.)

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

Barracuda 180FC Product Manual, Rev. A 5

3.0 General description

BarracudaTM 180FC drives combine giant magnetoresistive (GMR) heads, p artial response/maximum likeli­hood (PRML) read channel ele ctronic s, embedded servo technology, and a Fibre Channel interface to provide
high performance, high capaci ty data storage for a variety of syste ms inc luding en ginee ring work statio ns, net­work servers, mainframes, and supercomputers.

Barracuda 180FC drives are random access storage devices designed to support the Fibre Channel Arbitrated
Loop (FC-AL) and SCSI Fibre Cha nnel Protocol as descr ibed in the ANSI specificatio ns, this document, and
the Fibre C hannel Interface Manual (part number 77767 496) which d escr ibes the general i nterface character-
istics of this drive. Barracuda 18 0FC drives are classified as intelligen t peripherals and provide level 2 con­formance (highest level) with the ANSI SCSI standard.

The head and disc as sembly (HDA) is sealed at the factory. Air recirculates withi n 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 conta ins no parts replace able by the user and openin g the HDA for any reason
voids your warranty.

Figure 2. Barracuda 180FC disc drive

Barracuda 180FC dr ives use a dedicated land ing zone at the inner most radius of the me dia to eliminate th e
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 handl ing. The shipping lock disengages and the head lo ad process begins when power is
applied to the drive.

Barracuda 180FC drives decode track 0 location data from the servo data embedded on each surface to elimi­nate mechanical transducer adjustments and related reliability 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 180FC Product Manual, Rev. A

3.1 Standard features

Barracuda 180FC 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

• Supports SCSI enclosure services via interface connector

• 128-deep task set (queue)

• Supports up to 32 initiators

• Drive selection ID and configuration options are set on the FC-AL backpanel or through interface com­mands. Jumpers are not used on the drive.

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

• User-selectable logical block size (512 to 704 bytes per logical block)

• Selectable frame sizes from 256 to 2,112 bytes

• Industry standard 3.5-inch half high 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 shipping lock

• Embedded Grey Code track address to eliminate seek errors

• Self-diagnostics performed at power on

• 1:1 interleave

• Zone bit recording (ZBR )

• Vertical, horizontal, or top down mounting

• Dynamic spindle brake

• 4,096 Kbyte data buffer (16,384 Kbytes on FCV drives). 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 dr ive has a di ameter of a pproximately 84 mm (approximat ely 3.3 in ches). The alumi­num substrate is coate d with a thin film magnet ic material, overcoated wi th 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 (212 Mbytes/sec with 2 GHz link rate)

• 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

• 1,200,000 hour MTBF

• LSI circuitry

• Balanced low mass rotary voice coil actuator

Barracuda 180FC Product Manual, Rev. A 7

• Self-Monitoring Analysis and Reporting Technology (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 (LB As) per sparing zone. The following table shows the
standard OEM model capacity:

Formatted Unformatted

ST1181677FC/FCV 1522c441h (181.6 Gbytes) 241.9 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 obtai n different formatted capacit ies than those liste d. Barracuda
180FC drives use a zone spari ng s cheme. The drive is divided into frequency zones wi th a vari able number of
spares in each zone.

Note. For 2 gigabit operation, sector sizes must be divisible by 8.

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) param eter list table in the F ibre Chann el Inter face Manual, par t number 7767496 . A value of
zero in the Number of Blocks field indica tes that the dr ive will not change the ca pacity it is curren tly formatted
to have. A number other than zero and less than the maximum number of LBAs in th e Number of Bl ocks field
changes the total dr ive capacity to the value in th e Num ber of Bl ocks field. A value greater tha n the ma ximum
number of LBAs is rounded down to the maximum capacity.

3.7 Factory-installed accesso r ies

OEM standard drives are shipped with the Barracuda 180FC Installation Guide (part number 100107697).

3.8 Factory-installed options

You may order the following items which are incorporated at the m anufacturing facility durin g 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 p ack. The drive is nor mally shipped in bulk packag ing to provide maximum pro tection
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 180FC I nstallation Guide, par t number 100107697, is usually included with eac h standard
OEM drive shipped, but extra copies may be ordered.

• The Safety and Regulator y Agency Specifications, par t number 75789512, is usually inc luded 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.

• Single-unit shipping pack.

8 Barracuda 180FC Product Manual, Rev. A

Barracuda 180FC Product Manual, Rev. A 9

4.0 Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Bar­racuda 180FC drives.

4.1 Internal drive characteristics

ST1181677FC/FCV

Drive capacity 181.6 ........................Gbytes (formatted, rounded off value)

Read/write data heads 24

Bytes per track 406,071 ....................Bytes (average, rounded off values)

Bytes per surface 19,263 ......................Mbytes (unformatted, rounded off value)

Tracks per surface (total) 24,247 ......................Tracks (user accessible)

Tracks per inch 31,200 ......................TPI

Peak bits per inch 490 ...........................KBPI

Internal data rate 282-508....................Mbits/sec (variable with zone)

Disc rotation speed 7,200 ........................rpm (+

Avg rotational latency 4.17 ..........................msec

4.2 Seek performance characteristics

4.2.1 Access time

0.5%)

Including controller overhead
(without disconnect)

1, 2

(msec)

Not including controller overhead
(without disconnect)

1,2

(msec)

Read Write Read Write

ST1181677FC

Average Typical
Single track Typical
Full stroke Typical

3,4

3,4
3,4

7.6 8.4 7.4 8.2

1.0 1.3 0.8 1.1

16.2 17.2 16.0 17.0

1. Execution 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 = controller overhead + average seek time + latency time.

4.2.2 Format command execution time for ≥ 512-byte sectors

ST1181677FC/FCV

Maximum (with verify) 210 minutes
Maximum (without verify) 120 minutes

10 Barracuda 180FC Product Manual, Rev. A

4.2.3 General performance characteristics

Minimum sector interleave 1 to 1

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

Minimum 25.3 MBytes/sec
Average 36.1 MBytes/sec
Maximum 47.0 MBytes/sec

Fibre Channel Interface maximum instantaneous transfer rate 1 GHz

106 Mbytes/sec* per
port (dual port = 212
Mbytes/sec*)

Logical block sizes

Default is 512-byte data blocks
Variable 512 to 704 bytes per sector in even number of bytes per sec­tor. If n (number of bytes per sector) is odd, then n-1 will be used.

Read/write consecutive sectors on a track

Flaw reallocation performance impact (f or flaws realloca ted at format time
using the spare sectors per sparing zone reallocation scheme.)

Overhead time for head switch in sequential mode
Overhead time for one track cylinder switch in sequential mode
Average rotational latency

*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or

from the host.

Yes

Negligible

0.8 msec

1.2 msec (typical)

4.17 msec

2 GHz
212 Mbytes/sec* per
port (dual port = 424
Mbytes/sec*)

4.3 Start/stop time

If the Motor Start option is disabled, the drive becomes ready within 30 seconds after DC power is applied. If a
recoverable error condition is detected during the start sequence, the drive executes a recovery procedure and
the time to become ready may exceed 30 seconds. Stop time is less than 30 seconds (maximum) from removal
of DC power.

If the Motor Star t option is enabled, the i nternal contr oller accepts th e commands list ed in the Fibre Channel
Interface Manual less than 3 second s after DC power has b een applied. A fter the Motor St art command has
been received, the drive becomes ready for normal operations within 30 seconds (excluding the error recovery
procedure). The Motor Start command can also be used to command the drive to stop the spindle.

There is no power control switch on the drive.

4.4 Prefetch/multi-segmented cache control

The drive provides a prefetch (read look-ahead) and multi-segmented cache con trol algorithms that in many
cases can enhance s ystem performance. Cache refers to the drive buffer storage space when it is used in
cache operations. To select this feature, the hos t sends the Mod e Select command with the proper values i n
the applicable bytes in page 08h. Prefetch and cache operations are indep end ent features from the sta ndp oin t
that each is en abled and disabled ind ependently us ing the Mode Select comm and; 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 pa rameter values (Mode Page 08h) for standard OEM versions of this
drive family are given in Table 15.

Barracuda 180FC Product Manual, Rev. A 11

4.5 Cache operation

Note. Refer to the Fibre Channel Interface Manual for more detail concerning the cache bits.

Of the 4,096 kbytes physical buffer space i n the drive, 3,600 kbytes (14,399 k bytes of the 16,384 kbytes on
FCV units) can be used as a cache.

The buffer can be divided into logical segments (using 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 stor ed in each segment of the buffer. If the
cache is enabled (see RCD bit in the Fibre Ch ann el Interface Manual ), data requested by the host with a r ea d
command is retr ieved from the buffer, if possible, before any disc access is initia ted. If ca che operation is not
enabled, the buffer (still segmented with the required number of segm ents) is still used, but only a s circular
buffer segments during disc medium read operations (disregarding Prefetch operation for the moment). That is,
the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to
retrieve it. The retrieved data merely passes thr ou gh some buffer segment on the way to the host. On a cach e
miss, all data transfers to the host are in accordance with buffer-full ratio rules. On a cache hit, the drive ignores
the buffer-full ratio rules. See 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 logica l block is reached that is not in any cache seg ment, the drive fetches it and any

remaining requested logical block addresses fr om the disc and pu ts them in a se gment of the ca che. The
drive transfers the remaining requested log ical 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 logic al blocks from the disc and transfers them into a segment, and the n

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 cylinde r boundary to fetch data only if the Discontinuity (D ISC) bit is se t
to 1 in bit 4 of byte 2 of the Mode Select parameters page 08h. Default is zero for bit 4.

Each cache segment is actually a self-contained circ ular 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-selectable configu rations. The drive supports operati on of any integer
number of segments from 1 to 16. Div ide th e 3,600 K bytes in the buffer by the number of se gments to get th e
segment size. Default is 3 segments.

Note. The size of each segment is not repo r ted by Mode Sense c ommand pa ge 08h, bytes 14 and 15. The

value 0XFFFF is always reported regardless of the actual size of the segment. Sending a size specifi­cation using the Mode Selec t co mmand (bytes 14 a nd 15) does not set up a new seg ment s ize. 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 wr ite op eration by the dr ive that makes use of a drive buffer storage area where the data t o
be written to the medium is stored whil e the drive p erforms 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. The same buffer space and segme ntat ion is u sed a s set up for read func tions.
The buffer segmentation scheme is set up or changed independently, having nothing to do with the state of
RCD. When a write co mmand is issued, if RCD=0 , the cache is first checked to see if any logical blocks that

12 Barracuda 180FC Product Manual, Rev. A

are to be writte n are already stored in the cach e from a previous read or write comman d. 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 begin nin g of the operat ion ; 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 medium. 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 15 shows the mode default settings for the drive.

4.5.2 Prefetch operation

If the Prefetch feature is enabled, data in conti guous lo gical blocks on the disc immedia tely b eyond that which
was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer
to the host on subsequent Rea d comma nds tha t request th ose log ical blocks (this is tr ue even if cache opera­tion is disabled). Though the pr efetch operation uses the buffer as a cache, finding the reques ted data in the
buffer is a prefetch hit, not a cache operation hit.

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

Since data that is prefetched replaces data already in som e buffer segments, the host can limit the amoun t of
prefetch data to optimize system perform ance. 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 cross es a cy linder bou nda ry 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-ahe ad) is enabled (enabled by DRA = 0), it operates under the control of ARLA
(Adaptive Read Look-Ahead). If the host uses software interleave, ARLA enables prefetch of contiguous blocks
from the disc when it sense s that a prefetch hit will l ikely 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 softwa re interleave, and if two sequential read
operations are not for contiguous blocks of data , ARL A d isables pre fetch, but as long as s equ enti al read oper ­ations request contiguous blocks of data, ARLA keeps prefetch enabled.

4.5.3 Optimizing cache performance for desktop and server applications

Desktop and server applications require different drive caching operations for optimal performance. This
means it is difficult to provide a single configuration that meets both of these needs. In a desktop environment,
you want to configure the cache to r espond quickly to repetiti ve accesses of multiple s mall segments of dat a
without taking the time to “ look ahea d” to the next contiguous s egments of da ta. In a ser ver environment, you
want to configure the cac he to provide large volumes of sequential data in a non-repetitive manner. In this
case, the ability of the cache to “look a head” to the next contiguous segments of sequential data is a good
thing.

The Performance Mode (PM) bit contr ols the way the drive switches the cache buffer into different modes o f
segmentation. In “server mode” (PM bit = 0), the drive can dynamically change the number of cache buffer seg­ments as needed to optimize the performance, based on the command stream from the host. In “desktop
mode” (PM bit = 1), the number of segments is maintained at the value defined in Mode Page 8, Byte 13, at all
times. For additional information about th e PM bit, refer to the Unit Attention Parameters page (00h) of the
Mode Sense command (1Ah) in the Fibre Channel Interface Product Manual, part number 77767496.

Barracuda 180FC Product Manual, Rev. A 13

5.0 Reliability specifications

The following reliability speci fications assume correc t host and drive operational in terface, including all inter­face timings, power supply voltages, environmental requirements and drive mounting constraints

Seek error rate:
Read Error Rates

Recovered Data
Unrecovered Data
Miscorrected Data

Interface error rate:

1

Less than 10 errors in 10

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

Less than 1 error in 10

See Section 9.6.4, "Differential PECL input." on page 57
MTBF: 1,200,000 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

12

bits transferred (OEM default settings)

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 defin ed as a failure of the receiver on a por t 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 indi vidual device error
rates.

5.1.1 Environmental interference

When evaluating systems operation under condi tions of electrom agnetic inter ference (EMI), the perfor mance
of the drive within the system is consid ered ac ceptable if t he dri ve does not gene rate an unrec overable 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 Write errors

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 beca use of a n equipm ent mal functi on in the dr ive, the error is classi fied
as a failure affecting MTBF. Unrecoverable write errors are thos e that ca nnot be cor rected wi thin two attem pts
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 o f the dr i ve to posi tio n th e hea ds to th e ad dr esse d track. After d etec ti ng a n
initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails,
a seek positionin g error (15h) is report ed with a Medium error (3h) or Hard ware error (4h) repo rted in the

14 Barracuda 180FC Product Manual, Rev. A

Sense Key. Thi s is a n unrecoverable seek error. Unrecoverable seek errors are cl assi fie d a s failures for MTBF
calculations. Refer to the Fibre Channel Interface Manual, part number 77767496, for Request Sense informa­tion.

5.2 Reliability and service

You can enhan ce the reliabili ty of Barracuda 180F C disc drives by ensur ing that the dr ive receives adequate
cooling. Section 6 .0 provides re commende d air-flow inform ation, temp erature measur ements, and oth er 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 1,200,000 hours when operated in an environment that
ensures the case temperatures spec ified in Sectio n 6.4.1 are not exceeded. Shor t-ter m excursions up to the
specification limits of th e op erati ng e nvironmen t wi ll not a ffect MTBF p er formanc e. Ope rating th e drive at case
temperatures above these values will 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 mea s urement period = Es timated pow er-on operat ing 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 servic e. Each disc dr ive must have accumulated at least ni ne months of op eration. Data is c alculated 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 failure to meet defined specifications caused by drive malfunction.
A S.M.A.R.T. p redi ctive failure indicates th at the d r ive is deter iora ting to an imm inent failure and is consi dere d

an MTBF hit.

5.2.2 Preventive maintenance

No routine scheduled preventive maintenance is required.

5.2.3 Service life

The drive has a usefu l service life of five years. Depot repair or repl ac eme nt o f major parts is pe rmitted durin g
the lifetime.

5.2.4 Service philosophy

Special equipment i s requir ed to repa ir the dr ive HDA. To achieve the above service life, repairs must be per­formed only at a proper ly equ ipped and s taffed Seagate ser v ice and r epair facili ty. Troubleshooting and repa ir
of PCBs in the field is not recommen ded becaus e of the extensive diagnostic equipm ent requir ed for effective
servicing. There are not spare parts available for this drive. The drive warranty is voided if the HDA is opened.

5.2.5 Service tools

No special tools are requi red for site instal lat ion or recomm ended for site maintenance. Refer to Section 5.2.4.
The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not
practical because users cannot purchase individual parts for the drive.

Barracuda 180FC Product Manual, Rev. A 15

5.2.6 Hot plugging the drive

Inserting and removing the dr ive on the FC-AL will interrupt l oop operation. Th e interrup tion occurs wh en the
receiver of the next device in the loop must synchronize to a different input signal. FC error detection mecha­nisms, character sync, running disparity, word sync, and CRC are able to detect any error. Recov ery is initiated
based on the type of error.

The disc drive defaults to the FC-AL Moni toring s tate, Pass-through state, when it is powered-on by switching
the power or hot plugged. T he contro l line to a n optiona l por t bypass circuit (external t o the dr ive), defaults to
the Enable Bypass state. If the bypass circuit is prese nt, the next device in the loop wil l co nti nue to recei ve 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 star ts 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
inser ted drive.

If the self-test fails, the control line to the bypass circuit remains in the Enable Bypass state.
Note. It is the responsibil ity of th e system s inte grator to assu re that no tem perature, ener gy, 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.

5.2.7 S.M.A.R.T.

S.M.A.R.T. is an acro nym for Self-Monito ring A nalysis and Reporting Technology. This technol ogy is intended
to recognize conditions tha t indicate imminent d rive 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 drive’s firmware monitors specifi c attributes for degradation over time but can’t predict instan ta-

neous drive failures.

Each monitored att r ibute has been s elec ted to moni tor a speci fic set of failure condi tions in the op erating per­formance of the drive and the thresholds are optimized to minimize “false” and “failed” predictions.

Controlling 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 th e DEXCPT bit to enable or disable the S.M.A.R.T. feature. Setting the DEX­CPT bit disables all S.M.A.R.T . functions. When enabled, S.M.A.R.T. collects on-line data as the drive performs
normal read an d write operations. When the PE RF bit is set, the drive is consi dered to be in “On-line Mod e
Only” and will not perform off-line functions.

You can measure off-line attributes and force the dr ive 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 occur. Forcing S.M.A.R.T. with the RTZ comman d
resets the timer.

Performance impact

S.M.A.R.T. attr ibute data is saved to the disc so th at the events that caused a predictive failure can be r ecre­ated. The drive measures and saves parameters onc e every two hours subj ect to an idle per iod on the FC-A L

16 Barracuda 180FC Product Manual, Rev. A

bus. The process of measur i ng off-li ne att r ibute data a nd saving data to the d isc is unin terr uptable. The m axi­mum on-line only processing delay is summarized below:

Maximum processing delay

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

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

50 milliseconds

Fully-enabled delay
DEXCPT = 0, PERF = 0

300 milliseconds

Reporting control

Reporti ng is controll ed by the MRIE b its in the Infor mational E xceptio ns Control mo de page (1C h). Subje ct to
the repor ting me thod, th e firmware will issue to the ho st an 01-5Dx x sens e cod e. The error code is pre ser 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 determine rate, error events are logged and compared to the number of
total operations for a given attribute. The inte r val defines the numbe r of operat ions over which t o measur e 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. measur es error rates. All er rors for each monit ored 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 e rrors an d their inte r val. If the numbe r of e rrors exceeds the threshol d before
the interval expires, the error rat e is considered to be unacceptable. If the number of er rors does not exceed
the threshold before the interval expires, the error rate is considered to be acceptable. In either case, the inter­val and failure counters are reset and the process starts over.

Predictive failures

S.M.A.R.T. signal s predi ctive failures when the d rive is pe rforming unaccep tably for a period o f time. The f ir m­ware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accom­plish this, a counter is increme nted each time the er ror rate is unacceptable and dec remented (not to exceed
zero) whenever the error rate is acceptable. If the counter continually increm ents such that it reaches the pre­dictive threshold, a predi ctive failure is signaled. Thi s counter is referred to as the Failure History Counter.
There is a separate Failure History Counter for each attribute.

5.2.8 Drive Self Test (DST)

Drive Self Test (DST) is a tech nology designed to recognize d rive fault conditions that qu alify the drive as a
failed unit. DST validates the functionality of the drive at a system level.

There are two test coverage options implemented in DST:

1. Extended test

2. Short text

The most thorough option is the extended test that per forms various tes ts on the drive and scans every logical
block address (LBA) of the dr ive. The short tes t is time-restri cted and limited in len gth—it does not sca n the
entire media surface, but does some fundamental tests and scans portions of the media.

If DST encounters an er ror during either of these t ests, it reports a fault condition . If the drive fails the test,
remove it from service and return it to Seagate for service.

5.2.8.1 DST Failure Definition

The drive will presen t a “diagnostic failed” condition through the self-tests re sults value of the diagnostic log
page if a functional failure is enc ountered during D ST. The channel and ser vo parameter s are not mod ified to
test the drive more stringently, and the number of retries are not reduced. All retries and recovery processes
are enabled during the test. If data is recoverable, no f ailure condition will be reported regardless of the number
of retries required to recover the data.

Barracuda 180FC Product Manual, Rev. A 17

The following conditions are considered DST failure conditions:

• Seek error after retries are exhausted

• Track-follow error after retries are exhausted

• Read error after retries are exhausted

• Write error after retries are exhausted.
Recovered errors will not be reported as diagnostic failures.

5.2.8.2 Implementation

This section provides all of the information necessary to implement the DST function on this drive.

5.2.8.2.1 State of the drive prior to testing

The drive must be in a ready state before issuing the Send Diagnostic c ommand. There are multi ple reasons
why a drive may not be ready, some of which ar e valid condi tio ns, and not err ors. For example, a drive may be
in process of doing a format, or another DST. It is the responsibility of the host application to determine the “not
ready” cause.

While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a
failed drive.

A Drive Not Ready condition is reported by the drive under the following conditions:

• Motor will not spin

• Motor will not lock to speed

• Servo will not lock on track

• Drive cannot read configuration tables from the disc
In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.

5.2.8.2.2 Invoking DST

To invoke DST, submit the Send Diagnos tic co mmand with the appropr iate Function Code (001b for the s hor t
test or 010b for the extended test) in bytes 1, bits 5, 6, and 7. Refer to the Fibre Channel Interface Product
Manual, part number 77767496, for additional information about invoking DST.

5.2.8.2.3 Short and extended tests

DST has two testing options:

1. short

2. extended
These testing options are described in the following two subsections.
Each test consis ts o f thre e seg men ts : an elec trical test segment, a se rvo test segment, and a rea d/verify s ca n

segment.

Short test (Function Code: 001b)

The purpos e of t he sho rt test is to p rovide a t ime -limited test that tes ts as much of the drive as poss ible withi n
120 seconds. The shor t test does not scan the e ntire media surface, but does some fundamental te sts and
scans portions of the media. A complete read/verify scan is not performed and only factual failures will report a
fault condition. This option provides a quick confidence test of the drive.

Extended test (Function Code: 010b)

The objective of the extended test option is to empirically test critical drive components. For example, the seek
tests and on-track operations test the posi ti oni ng me ch ani sm . The r ead operat ion test s the rea d hea d ele men t
and the media su rface. The write elem ent is tested through read/wr ite/read operations. The integrity o f the
media is checked through a read/verify scan of the m edia. Mo tor functio nality is test ed by default as a par t o f
these tests.

The anticipated length of the Extended test is reported through the Control Mode page.

18 Barracuda 180FC Product Manual, Rev. A

5.2.8.2.4 Log page entries

When the drive begins DST, it creates a new entry in the Self- tes t Re su lts Lo g pa ge. The new en try is created
by inserting a new self-test parameter block at the beginning of the self-test results log parameter section of the
log page. Existing data will be moved to make room for the new parameter block. The drive reports 20 parame­ter blocks in the log page. If there are mor e than 20 pa rameter blocks, the least r ecen t pa rame ter block will be
deleted. The new parameter block will be initialized as follows:

1. The Function Code field is set to the same value as sent in the DST command

2. The Self-Test Results Value field is set to Fh

3. The drive will store the log page to non-volatile memory

After a self-test is complete or has been aborted, the drive updates the Self-T est Results Value field in its Self­Test Resul ts Log pag e i n no n- volatile me mory. The host may use Log S ense to read the results fr om up to th e
last 20 self-tests performed by the drive. The self-test results value is a 4-bit field that reports the results of the
test. If the field is zero, the drive passed with no errors detected by the DST. If the field is not zero, the test
failed for the reason reported in the field.

The drive will repor t the failure condition and LBA (if appl icable) in the Self-test Results L og parameter. The
Sense key, ASC, ASCQ, and FRU are used to report the failure condition.

5.2.8.2.5 Abort

There are several ways to abort a diagnostic. You can use a SCSI Bus Res et or a B us Device Res et me ss ag e
to abort the diagnostic.

You can abort a DST executing in background mo de by using the abor t code in the DS T Function Code field .
This will cause a 01 (self-test abor ted by the appli cation client) code to appear in the sel f-test results values
log. All other abort mechanisms will be reported as a 02 (self-test routine was interrupted by a reset condition).

5.2.9 Product warranty

Beginning on the da te of sh ip men t to t he cus tom er an d c onti nuing for a per io d of five years, Seagate warrants
that each product (includ ing componen ts and subass emblies) that fails to function pr operly unde r normal use
due to defect in materials o r workmanship or due to nonc onformance to the applicable s pecifications will be
repaired or replaced, at Sea gate’s option and at no charge to the customer, if returned by customer at cu s­tomer’s expense to Seagate’s designated facility in accordance wi th Seagate’s warranty procedure. Seagate
will pay for transporting the repair or replacement item to the customer. For more detailed warranty information,
refer to the standard terms and con ditions of purchase for Seagate produc ts. Refer to Section 10 for contact
information.

Shipping

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

Seagate repair centers may refuse receip t of compon ents imp roper ly pa ckaged or obviously damaged in tran­sit. Contact your authorized S eagate distr ibutor to purchase ad ditional boxes. Seagate recommends sh ipping
by an air-ride carrier experienced in handling computer equipment.

Product repair and return information

Seagate customer se rvice centers are the only facilities author ized to service Seagate drives. Seagate does
not sanction any thir d-party repair facilities. Any unautho rized repair or tampering wit h the factory sea l voids
the warranty.

Barracuda 180FC Product Manual, Rev. A 19

6.0 Physical/electrical specifications

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

6.1 AC power require ments

None.

6.2 DC power requirements

The voltage and current req uirements for a single dr ive are shown below. Val ues indicated app ly at the dr ive
connector.

Table 1: DC power requirements

ST1181677FC/FCV

Notes (Amps) (Amps)

Voltage +5V +12V [2]
Regulation [5] ±5% ±5% [2]
Avg idle current DC X
Maximum starting current

(peak DC) DC 3σ [3] 0.89 1.55

(peak AC) AC 3σ [3] 1.01 3.10
Delayed motor start (max) DC 3σ [1] [4] 0.85 0.03
Peak operating current:
Typical DC X
Maximum DC 3σ [1] 0.89 0.89
Maximum (peak) DC 3σ 1.37 2.23

[1] [7] 0.82 0.53

[1] [6] 0.86 0.84

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

ues. Power supply at nominal voltage. N = 6, 22 Degrees C ambient.

[2] For +12 V, a –10% tolerance is allowed dur ing i nitial spindl e start but must retur n to ±5% before reaching

7,200 RPM. The ±5 % must be maintained after the drive signifies that its power-up sequence has bee n

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 the Motor Star t option is enabled and the dr ive has not yet received a Start

Motor command.
[5] See paragraph 6.2.1, "Conducted noise im mu nity." Specified voltage tolerance includes ripp le, nois e, and

transient response.
[6] Operating condition is defined as rando m 8 block reads at 160 I/Os per sec ond. C urre nt an d power spec-

ified at nominal voltag es. Decreasing +5 volt sup ply by 5% inc reases 5 volt current by 2. 9%. Decreas ing

+12 volt supply by 5% increases 12 volt current by 2.4%.
[7] During idle, the drive heads a re relocated every 60 secon ds to a random location within the band from

track zero to one-fourth of maximum track.

General DC power requirement notes.

1. Minimum current loading for each supply voltage is not less than 1.3 % of the maximum operating cu rrent

shown.

2. The +5V and +12V supplies should employ separate ground returns.

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

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

20 Barracuda 180FC Product Manual, Rev. A

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

5. No terminator power.

6.2.1 Conducted noise immunity

Noise is specified as a periodi c and random distribution of frequencie s 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 requir e power sequencing. T he drive protects aga inst inadver tent wr iting dur ing power-up
and down.

6.2.3 Current profiles

Figure 3 identifies the drive +12V current profile. Th e current duri ng the various times is as shown:

T0 Power is applied to the drive.
T1 Controller self-tests are performed.
T2 Spindle begins to accelerate under current limiting 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

2.5

2.0

1.5
A

1.0

0.5

0.0

0 2 4 6 810121416

T0 T1 T2 T3 T4

Envelope of waveform

Average value of waveform

Seconds

Figure 3. Typical ST1181677FC drive +12V current profile

Barracuda 180FC Product Manual, Rev. A 21

+5 Volt Current during spindle start — Typical Amperes

2.5

2.0

1.5
A

1.0

Nominal (average) DC curve

0.5

AC Component

0.0

T0

T1 T5

T2

T3 T4

0 4 8 121620242832

Seconds

Figure 4. Typical ST1181677FC drive +5V current profile

22 Barracuda 180FC Product Manual, Rev. A

6.3 Power dissipation

Typical power dissipation under idle conditions is 10.5 watts (35.86 BTUs per hour).
To obtai n operating power for typical random read operations, refer to the following I/O rate cur ve (see Figur e

5). Locate the typical I/O rate for a dri ve in your system on the hor izontal axis and read the corresp onding + 5
volt current, +12 volt curr ent , a nd tota l watts on th e vertical axis. To calculate BT Us pe r hour, multiply watts by

3.4123.

1.800

1.600

1.400

1.200

17

5V A
12V A
Watts

1.000

Amperes

0.800

0.600

0.400
0 50 100

I/Os per Second

Figure 5. ST1181677FC DC current and power vs. input/output operations per second

150

15

Watts

13
11

200

6.4 Environmental limits

Temperatu re an d humidity values experienced by the drive must be such that cond ens ati on doe s n ot o ccur o n
any drive part. A ltitude and atmospher ic pressure specificat ions are referenced to a standa rd 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 temperatur e, the drive meets all specificati ons over a 41°F to
122°F (5°C to 50°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C)
per hour. The enclosure for the drive should be designed such tha t these tempe ratures are not exceeded.
Air flow may be needed to achieve these temperature values (see Section 8.4). Operation at HDA case tem­peratures above these values may adversely affect the drives ability to meet specifications.

The MTBF specificati on for the drive is based on operating in an e nvironment that ensures that the HDA
case temperatures are not exceeded. Occasional excursions to drive ambient temperatures of 122°F
(50°C) or 41°F (5°C) may occur without impact to specified MTBF. Air flow may be needed to achieve these
temperatures. Continual or sustained operation at HDA case temperatures above these values may
degrade MTBF. The maximum allowable continuous or sustained HDA case temperature for the rated
MTBF is 122°F (50°C).

To confi r m that the requ ired coo ling for the HDA is provided, place the dr ive in its fi nal mecha nical confi gu­ration, perform random wri te/re ad opera tions. After the tem peratures stab ilize, measure th e cas e temp era­ture.

The maximum allowable HDA case temperature is 140°F (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.

Barracuda 180FC Product Manual, Rev. A 23

b. Non-operating

–40° to 158°F (–40° to 70°C) package ambient w ith 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

Figure 6. Location of the HD A Temperature check point

1.0"

.5"

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 spec ified in this docume nt are mea sured di rectl y on the dr ive chass is. If the dr ive is
installed in an enclo sure to which the stat ed shock and/or vibratio n criteri a is applied, reso nances 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 sho ck and vibration de fined within this document are speci fied with the drive mounted by any of
the four methods shown in Figure 7, and in ac cordance with the restriction s of Section 8.5 . Orientation of th e
side nearest the LED may be up or down.

6.4.4.1 Shock

a. Operating—normal

The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not
exceeding 10.0 Gs at a maximum duration of 11 msec (half sinewave). The drive, as installed for normal
operation, shall operate error free whi le subj ec ted to in termittent shock not exceeding 65 Gs at a maximum
duration of 2 msec (half sinewave). Shock may be applied in the X, Y, or Z axis.

b. Operating—abnormal

Equipment, as ins talled for norma l operation, doe s not incur p hysical damage while s ubjected to inter mit­tent shock not exceeding 40 Gs at a maximum duration of 11 msec ( half sinewave). Shock occurring a t

24 Barracuda 180FC Product Manual, Rev. A

abnormal levels may promote degraded operational performance during the abnormal shock period. Speci­fied operational performance will continue when normal operating shock levels resume. Shock may be
applied in the X, Y, or Z axis. Shock is not to be repeated more than two times per second.

c. Non-operating

The limits of non- operating shock shal l appl y to all c onditi ons of h andlin g a nd transpo rtation. This inc ludes
both isolated drives and integrated drives.

The drive subject ed to nonrepetitive shock not exceeding 75 Gs at a ma ximum duration of 11 msec (half
sinewave) shall not exhibit device damage or performan ce degradati on. Shock may be appl ied in the X, Y,
or Z axis.

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

The drive subjected to no nrepetitive shock not exceeding 80 Gs at a max imum duration of 0.5 msec (half
sinewave) does not exhibit device damage or performance degradation. Sh ock may be applied in the X , Y,
or Z axis.

d. Packaged

Disc drives shipped as lo ose load ( not pall etized) general fr eight will b e packaged to withs tand drop s from
heights as defined in the table below. For additional details refer to Seagate specifications 30190-001
(under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg).

Package size Packaged/product weight Drop height

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

Drives packaged in single o r multipacks with a gr oss weight o f 20 pounds (8.95 kg) or less by Seaga te for
general freight shipmen t shall withs tand a drop tes t from 48 in ches (1,070 mm) again st a concre te floor or
equivalent.

Barracuda 180FC Product Manual, Rev. A 25

Z

Y
X

Figure 7. Recommended mounting

X

Z

Y

26 Barracuda 180FC Product Manual, Rev. A

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.
Operating normal translational random flat profile
10 - 400 Hz 0.4 GRMS

b. Operating - abnormal

Equipment as inst alled for normal operation shall no t incur physical damage while subjected t o periodic
vibration not exceeding:

15 minutes of duration at major resonant frequency

5-400 Hz @ 0.75 G (X, Y, or Z axis)
Vibration occurring at these levels may degrade operational performance during the abnormal vibration

period. Specified operational performance will continue when normal operating vibration levels are
resumed. This assumes system recovery routines are available.

Operating abnormal translational random flat profile
10 - 400 Hz 1.2 GRMS

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 dama ge or degraded performan ce as a resu lt of continuous vi bration not
exceeding

5-22 Hz @ 0.040 inches (1.02 mm) displ ace men t

22-400 Hz @ 2.00 G
Vibration may be applied in the X, Y, or Z axis.
Non-operating translational random flat profile
10 - 400 Hz 1.2 GRMS

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 3.7 bels typical when measured to ISO 7779 specification.
There will not be any discrete tone s more than 10 dB above the masking nois e on typical drives when mea-

sured according to Sea gate specifi cation 30553-00 1. There will no t be any tones more than 2 4 dB above the
masking noise on any drive.

6.4.7 Electromagnetic susceptibility

See Section 2.1.1.1.

Barracuda 180FC Product Manual, Rev. A 27

6.5 Mechanical specifications

The following nominal dimensions are exclus ive of the decorati ve front panel acce ssory. However, dimensi ons
of the front panel are shown in figu re below. Refer to Figure 8 for detailed mounting co nfigura tion di mensions.
See Section 8.5, “Drive mounting.”

Height: 1.6 in 40.64 mm
Width: 4.000 in 101.6 mm
Depth: 5.75 in 146.05 mm
Weight: 2.3 pounds 1.043 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

28 Barracuda 180FC Product Manual, Rev. A

Barracuda 180FC Product Manual, Rev. A 29

7.0 Defect and error management

The drive, as delivered, complies with this prod uct manual . The read error rates and specifi ed storage cap aci­ties are not dependent upon use of defect management routines by the host (initiator).

Defect and error management in the SCSI protocol involves the drive internal defect/error man agement and
FC-AL system error considerations (errors in communications between the initiator and the drive). T ools for use
in designing a defect/error management plan are b riefly ou tlined in th is section. References to other sec tions
are provided when necessary.

7.1 Drive internal defects/errors

During the initial d rive format operati on at the factor y, media defects are identified, tagged as being unusa ble,
and their locations reco rded on the drive primary defects list (referred to as the “P’ list and also as the ETF
defect list). At factory format time, these known defects are also reallocat ed, that is, reassigned to a new place
on the medium and the l ocation listed in the defects reallocation table. The “P” li st is not alter ed after factory
formatting. Locations of defects found and reallocated d uring error r ecovery procedures after drive shipment
are listed in the “G” l ist (defects growth list). Th e “P” and “G” lists may be referenced by the initiator using the
Read Defect Data command.

Details of the S CSI commands supp orted by th e drive are descr ibed in the F ibre Channel 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. Err or rec overy and defect managem ent may involve using sev­eral SCSI commands descr ibed in the Fibre C hann el Interface Manual. The dr ive imple ments selec table error
recovery time limits required in video applications.

The error recovery scheme supported by the drive provides a way to control the total error recovery time for the
entire command in addition to controlling t he r ec overy level for a single LBA. The to tal amo unt of ti me s pe nt i n
error recovery for a command c an b e li mited us ing the Rec over y Ti me Lim it bytes in the Er ror Rec overy mod e
page. The total amount of time spen t in error 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 e rror rec overy algor ithms c onsists o f 12 levels for read recoveries and fi ve levels for write.
Each level may consist of multiple steps, where a step i s defined as a re covery functio n involving a single re­read or re-write attem pt. The m aximum level used by the drive in LBA recovery is determined by the read and
write retry counts.

Table 2 equate s the read and write retr y count with the maximum poss ible recovery time for read and write
recovery of individua l LBA s. The time s given do not i nclude t ime taken to perform r eall ocations. Rea llocati ons
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. Time needed to perform reallocation is not counted
against the recovery time limit.

30 Barracuda 180FC Product Manual, Rev. A

When the RC bit is one, reallocation s 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 2: Read and write retry count maximum recovery times

Maximum recovery time per

Read retry count

077.7 035.8

189.7 153.7
2 304.9 2 59.7
3 328.9 3 113.6
4 364.6 4 227.1
5 412.5 5 (default) 268.9

6520.0

7532.0

8555.9

9609.7
10 684.1
11 (default) 1,542.2

1

LBA (cumulative, msec)

Write retry count

Maximum recovery time per

1

LBA (cumulative, msec)

[1] Setting these retry co unts to a value below the default setti ng could result i n degradation of t he unrecov-

ered error rate. For example, suppose the read/wr ite recovery page has the RC bit = 0, th e read retry
count set to 4, and the rec overy time l imit set to 450. A 4- block read comma nd can take up to 365 ms ec
recovery time for each block and a maximum of 450 msec recovery for all four blocks. If either of these lim­its is reached and a block has not yet been recovered, the command will end with Check Conditi on st atus
and an unrecoverable read error will be reported.

7.3 FC-AL system errors

Information on the rep orting of ope rational errors or faults across the int erface is given in the Fibre Channel
Interface Manual. The FCP Respons e r eturns information to the ho st abou t num erous k ind s of error s 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 role in systems error management and its use in that respect is described in sections where the various
commands are discussed.

Barracuda 180FC Product Manual, Rev. A 31

8.0 Installation

Barracuda 180FC disc dr ive installation is a plug -and-play process. There are no jumpe rs, switches, or termi­nators on the drive. Simply plug the drive into the host’s 40-pin Fibre Channel backpanel connector (FC­SCA)

—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 21). If you set the AL_PA on
the backpanel to any value other tha n 0, the device plugg ed into the b ackpanel’s SCA connector inhe rits this
AL_PA. In the event you don’t succes s full y as si gn u niq ue hard addresses ( an d the re fore have duplicate selec­tion IDs assigned to two or more devices), the FC-A L gene rates a me ssage indicating this condition. If you set
the AL_PA on the backpanel to a value o f 0, the system iss ues a uniqu e soft -assig ned physical addre ss au to­matically.

Loop initialization i s the process used to verif y or obtain an address. The loop initialization p rocess 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 selec tions in the connector pr ior to applying power to the dr ive. If you change options after
applying power to the drive, recycle the drive power to activate the new settings.

• It is not necess ar y to low-level format this dr ive. The dr ive is s hippe d fro m the factory low-level formatted i n
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 throug h the inte rface connector (J1). Table provides the pin descripti ons for the 40­pin Fibre Channel single connector (J1).

8.2 LED connections

A connector, J6, is provided on the printed c ircu it bo ar d asse mbly (P CBA) to pr ovide port bypass, drive active,
and drive fault LED connecti ons (see Figure 1 0). See Se ctions 9.5.7, 9.5.8 , and 9. 5.9 for descr iptions of LED
functions.

J6

Figure 9. Physical interface

32 Barracuda 180FC Product Manual, Rev. A

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 resistor in series with this LED driver. Tie the minus side of an

external high-efficien cy LED (i.e., 2ma) to this pin. Connec t the plus side of the LED to
+5V.

[2] An external current-limiting re sistor is r equired whe n 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 o rientation. All drive perform ance 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 des igned by th e custo mer so that the ambien t temperatu re imme diately s urroundin g
the drive will not exceed temperature conditions specified in Section 6.4.1, "Temperature."

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

Forced air flow may be required to keep temperatures at or below the temperatures sp ecifi ed in Sec tion 6.4.1 ,
in which case the drive should be oriented, or air flow directed, so that the least amount of air flow resistance is

Barracuda 180FC Product Manual, Rev. A 33

created while pr oviding air flow to the el ectronics and HDA. Also, the shor test possible path b etween the air
inlet and exit should be c hosen to min imize the travel length of a ir heate d by the dr ive and oth er he at sourc es
within the rack, cabinet, or drawer environment.

If forced air is determined to be necessa r y, possible air-flow patterns are shown in Figure 11. T he 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 patter ns are acceptable a s 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 drive by attempting to mount it on a stiff, non-flat surface.

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

K x X = F < 15lb = 67N

where K is the mounting s urface stiffness (units in lb /in or N/mm) and X is th e out-of-plane sur face distortio n
(units in inches or millim eters). The ou t-of-plane distor tion (X) i s deter mined by defini ng a plane wi th three of
the four mounting points fixed and evaluating the out-of-plane deflection of the four th mounting point when a
known force (F) is applied to the fourth point.

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

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

34 Barracuda 180FC Product Manual, Rev. A

8.6 Grounding

Signal ground (PCBA) and HDA ground are connecte d together in the drive and cannot be sepa rated by the
user. The equipment in which the drive is moun ted i s co nnec te d dire ct ly to th e HDA and PCBA wi th n o el ectri­cally 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 nonconductive (electr ically isol ating) method of mou nt­ing the drive in the host equipment.

Increased radiated emi ssions may result if you do not provide the maximum surface area ground connection
between system ground and drive ground. This is the system designer’s and integrator’s responsibility.

Barracuda 180FC Product Manual, Rev. A 35

9.0 Interface requirements

This section par ti ally descr ibes the i nterface requireme nts as impleme nted on Barracu da 180FC dr ives. 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 180FC drives.

9.1.1 Fibre Channel link service frames

Table 3 lists the link services supported by Barracuda 180FC drives.

Table 3: Link services supported

Type of frame Link ser v ice

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 Login (FLOGI)
Logout (LOGO)
Process Login (PRLI)
Process Logout (PRLO)
Read Link Status (RLS)
Fabric Address Notification (FAN)
Port Discovery (PDISC)
Address Discov ery (ADISC)
Third-party Process Logout (TRPLO)

Extended link service reply frames 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 4 lists the Fibr e C hannel SCSI Fibre Chann el Pr oto co l (FC S C SI FC P) ta sk m ana gem ent functions sup­ported.

Table 4: Fibre Channel SCSI FCP task management functions

Task name Supported

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

9.1.3 Fibre Channel task management responses

Table 5 lists the FC SCSI FCP response codes returned for task management functions supported.

Table 5: FC SCSI FCP response codes

Function name Response code

Function complete 00
Function not supported 04
Function reject 05

36 Barracuda 180FC Product Manual, Rev. A

9.1.4 Fibre Channel port login

Table 6 identifies the required content of the N_Port Login (PLOGI) payload from an initiator.

T a b le 6: N_Port login (PLOGI) payload

Bytes

0-15 03 00 00 00 XX XX 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 XXXXFSFSXXCSXXXXClass 3
80-83 OS OS XX XX
84-95 XXXXXXXXXXXXXXXXXXXXXXXXReserved
96-99 XX XX XX XX
100-111 XXXXXXXXXXXXXXXXXXXXXXXXVendor
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 supported.
Valid vers ion 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_PA address association is detected dur-

ing 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 Initiator control

MSB XID reassign xx

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

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

Barracuda 180FC Product Manual, Rev. A 37

9.1.5 Fibre Channel port login accept

Table 7 identifies the N_Port Login access payload values.

Table 7: N_Port Login Accept (ACC) payload

Bytes

0-15 02 00 00 00 20 20 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 000000000000000000000000Vendor ­112-115 00 00 00 00 Version

FS Recei ve buffer field size . The drive returns and u se s the rec eive buffer size from the N_Port Login Class 3 rec eive

buffer.

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_LOGI received on Port A.
02 P_LOGI received on Por t B.

9.1.6 Fibre Channel Process Login

Table 8 lists the process login payload data.

T a b le 8: 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 00000022

XX Indicates fields that are not used.

9.1.7 Fibre Channel Process Login Accept

Table 9 lists Barracuda 180FC process login accept payload data.

Table 9: Process Login Accept (ACC) payload

Bytes

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

38 Barracuda 180FC Product Manual, Rev. A

9.1.8 Fibre Channel fabric login

Table 10 lists the fabric login payload from the drive.

Table 10: Fabric Login (FLOGI) payload

Bytes

0-15 04 00 00 00 20 20 00 00 08 00 08 40 00 00 00 00 Common
16-31 000002F420PP002037UIUIUI02000020
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 800000000000084000000000Class 3
80-83 00 00 00 00
84-95 000000000000000000000000Reserved
96-99 00 00 00 00
100-111 000000000000000000000000Vendor ­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.

Barracuda 180FC Product Manual, Rev. A 39

9.1.9 Fibre Channel fabric accept login

Table 10 lists the required content of the Fabric Login Accept (ACC) payload from the fabric.

Table 11: Fabric Login Accept (ACC) payload

Bytes

0-15 02 00 00 00 XX XX BB BB CF XX FS FS R_ A_ T0 V_ Common
16-31 E_D_T0 V_ PNPNPNPNPNPNPNPNNNNNNNNN
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 SOSOxx xx XXXXFSFSXXxx XXXXClass 3
80-83 OS OS XX XX
84-95 XXXXXXXXXXXXXXXXXXXXXXXXReserved
96-99 XX XX XX XX
100-111 XXXXXXXX XXXXXXXXXXXXXXXXVendor ­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 versi on level x
N_Port/F_Port Must = 1, F_Port
Alternate credit model Must = 1
Other bits reserved xxx XX

FS Receive buff er 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 buff er 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 port 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 Class valid Must = 1

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

40 Barracuda 180FC Product Manual, Rev. A

9.1.10 Fibre Channel Arbitrated Loop options

Table 12 lists the FC-AL options supported by Barracuda 180FC drives.

Table 12: 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 Position Yes
Loop Position Report Yes

9.2 Dual port support

Barracuda 180FC dri ves have two independent FC-AL por ts. These por t s may be connected on ind ependent
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, bot h
ports will have the same loop address.

• If both ports ar e con nected in the same loop and har d add ress i ng is used , at least one por t will attem pt tak­ing a soft address to prevent an address conflict.

Note. When a Barracuda 180F C drive is connected i n loops with the following previous Seagat e 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 a nd B for thes e p roduc ts must follow the re q uirements in their produ ct manu­als.

Subject to buffer availability, the Barracuda 180FC drives support:

• Concurrent por t transfers—The drive supports rece iving tran sfers on both ports at the sa me time when the
ports are on independent loops.

• Full duplex—The drive su pports sending F CP_Data, FCP_RSP, FCP_XFR_RDY and ELS transfers while
receiving frames on both ports.

Barracuda 180FC Product Manual, Rev. A 41

9.3 SCSI commands supported

Table 13 lists the SCSI commands supported by Barracuda 180FC drives.

T a b le 13: Supported command s

Command code Supported [4] Command name

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

Y Extended sense
Y Field pointer bytes

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

Y Vital product data page (00h)

Y Unit serial number page (80h)

Y Implemented operating def. page (81h)

Y Device identification page (83h)

Y Firmware numbers page (C0h)

Y Date code page (C1h)

Y Jumper settings page (C2h)

Y Device behavior page (C3h)
15h Y Mode select (same pages as Mode Sense command shown below) [3]
16h Y Reserve

N 3rd party reserved

N Extent r eservation
17h Y Release
18h N Copy
1Ah Y Mode sense

Y Unit attention page (00h)

Y Error recovery page (01h)

Y Disconnect/reconnect control (page 02h)

Y Format page (03h)

Y Rigid disc drive geometry page (04h)

Y Verify error recov ery page (07h)

Y Caching parameters page (08h)

Y Fibre Channel interface control page (19h)

Y Control mode page (0Ah)

Y Power control page (1Ah)

Y Information exceptions control page (1Ch)
1Bh Y Start unit/stop unit
1Ch Y Receive diagnostic resu lts

Y Supported diagnostics pages

42 Barracuda 180FC Product Manual, Rev. A

T a b le 13: Supported command s (continued)

Command code Supported [4] Command name

Y Translate page
Y Enclosure services page

1Dh Y Send diagnostics page

Y Supported diagnostics pages

Y Translate page
25h Y Read capacity
28h Y Read extended

Y Disable page out

Y Force unit access

N Relative address
2Ah Y Write extended

Y Disable page out

Y Force unit access

N Relative address
2Bh Y Seek extended
2Eh Y Write and verify

Y Disable page out

Y Byte check

N Relative address
2Fh Y Verify

Y Disable page out

Y Byte check

N Relative address
30h N Search data high
31h N Search data equal
32h N Search data low
33h N Set limits
34h N Prefetch
35h Y Synchronize cache
36h N Lock-unlock-cache
37h Y Read defect data
39h N Compare
3Ah N Copy and verify
3Bh Y Write buffer

Y Write combined header and data mode (0)

Y Write data mode (2)

N Download microcode mode (4)

Y Download microcode and save modes (5)

N Download microcode with offsets mode (6)

Y Download microcode with offsets and save mode (7)

Y Firmware download option [2]
3Ch Y Read buffer

Y Read combined header and data mode (0)

Y Read data mode (2)

Barracuda 180FC Product Manual, Rev. A 43

T a b le 13: Supported command s (continued)

Command code Supported [4] Command name

Y Read descriptor mode (3)
3Eh Y Read long
3Fh Y Write long
40h N Change definition
41h Y Write same

N PBdata

NLBdata
42-4Bh N Not used
4Ch Y Log Select
4Dh Y Log Sense

Y Supported Log page (00h)

Y Write Error Counter page (02h)

Y Read Error Counter page (03h)

N Read Reverse Error Counter page (04h)

Y Verify Error Counter page (05h)

Y Non-medium Error Counter page (06h)

Y Temperature page (0Dh)

N Application Client page (0Fh)

Y Self Test Results page (10h)

Y Cache Statistics Counter page (37h)

Y Factory Log page (3Eh)
4E-4Fh N Not used
50h N XD write
51h N XP write
52h N XD read
53-54h N Not used
55h Y Mode Select (10) [3]
56h Y Reserved (10)

Y 3rd party reserve

N Extent r eservation
57h Y Released (10)
58-59h N Not used
5Ah Y Mode Sense (10) [3]
5B-5Dh N Not used
5E A Persistent reserve in
5F A Persistent re serve out
60-7Fh N Not used
80h N XD write extended
81h N Rebuild
82h N Regenerate
83-8Fh N Not used
C0-DFh N Not used
EO-FFh N Not used

44 Barracuda 180FC Product Manual, Rev. A

[1] Barracuda 180FC drives can format to any multipl e o f four bytes per log ical block in the range 51 2 to 70 4

bytes.

[2] Warning. Power loss during flash programming can re sult i n fir mware corr upti on. Th is usual ly makes th e

drive inoperable.
[3] Reference Mode Sense command 1Ah for mode pages supported.
[4] Y = Yes. Command is supported.

N = No. Command is not supported.

A = Support is available on special request.

Barracuda 180FC Product Manual, Rev. A 45

9.3.1 Inquiry data

Table 14 lists th e Inquir y com mand data th at the dr ive should retur n to the i nitiator per the format given in the
Fibre Channel Interface Manual.

T a ble 14: Barracuda 180FC inquiry data

Bytes Data (hex)

0-15 00 00 ** 12 8B 00 PP 0A 53 45 41 47 41 54 45 20 Vendor ID
16-31 [53 54 31 31 38 31 36 37 37 46 43 20] 20 20 20 20 Product ID
32-47 R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00
48-63 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
64-79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80-95 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
96-111 00 43 6F 70 79 72 69 67 68 74 20 28 63 29 20 32* *Copyright
112-127 30* 30* 31* 20 53 65 61 67 61 74 65 20 41 6C 6C 20 notice
128-143 72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20

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

03 = The device complies to ANSI X3.301:199x

PP 50 = Inquiry data for an Inquiry command received on Port A.

70 = Inquiry data for an Inquiry command received on Port B.
R# Four ASCII digits representing the last four digits of the product firmware release number.
S# Eight ASCII digits representing the eight digits of the product serial number.
[ ] Bytes 16 through 27 reflect drive model.

9.3.2 Mode Sense data

The Mode Sense command provides a way for the drive to report i ts operating parameters to the ini tiator. The
drive maintains four sets of mode parameters:

1. Default values

Default values are hard-coded in the drive firmware stor ed in flash E-PROM (nonvolatile memor y) 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 in itiator c an reque st and recei ve from the dri ve a list of default values and use
those in a Mode Select comma nd to set up new current and saved values, where the values are change­able.

2. Saved values

Saved values are stored on the dri ve’s media using a Mode Selec t com mand. On ly pa rameter 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 saved values from the media and stores them as current values
in volatile memory. It is not possible to change the current values (or the saved values) with a Mode Select
command before the drive achieves operating speed and is “ready.” An attempt to do so results in a “Check
Condition” status.

On drives requiri ng unique saved values, the required un ique saved values are stored i nto the saved val­ues storage location on the me dia prior to shippin g t he drive. Some drives may have unique fir mware wit h
unique default values also.

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

46 Barracuda 180FC Product Manual, Rev. A

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 identifi ed as changeable values. Orig inally, current values are installed
from saved or default values after a power on reset, hard reset, Target Reset, or LIP Reset.

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

and saved values can be changed by a Mode Select command. A one (1) indicates the value can be
changed. A zero (0) in dicates the value is not changeable. For example, in Table 15 , refer to Mode page
81, in the row entitled “CHG.” These are hex numbers representing the ch ang eable values for Mode page

81. Note in columns 5 and 6 (bytes 04 and 05), there is 00h which indicates that in bytes 04 and 05 none of
the bits are changeable. Note also that bytes 06, 07, 09, 10, an d 11 are not changeable, because those
fields are all zeros. In byte 02, hex value FF equates to the b inary patter n 11111111. If there is a zero i n
any bit position in the field, it means that bi t is not changea ble. 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 of ten several different versions of drive control firmware in the total po pulation of

drives in the field, the Mode Sens e 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 Chan nel Inter face Manual).

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

Barracuda 180FC Product Manual, Rev. A 47

Table 15: Mode Sense data default and changeable values for ST1181677FC drives

ST1181677FC
Bytes

Mode
Sense
Header

DEF

CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff

DEF 82 0e 80 80 00 00 00 00 00 00 27 cc 00 00 00 00

CHG 82 0e ff ff 00 00 00 00 00 00 ff ff 00 00 00 00

DEF 83 16 11 06 00 00 00 10 00 00 02 63 02 00 00 01 00 5a 00 54 40 00 00 00

CHG

DEF 84 16 00 5e b7 18 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1c 09 00 00

CHG

DEF 87 0a 00 0b f0 00 00 00 00 00 ff ff

CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff

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

00 ae 00 10 00 00 00 08 15 22 c4 41 00 00 02 00

<-----------------------------Mode Page 10 Byte Header Data and Parameter Data Bytes--------------------------->
81 0a c0 0b f0 00 00 00 05 00 ff ff

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

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

DEF 88 12 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 15 da

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 00 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 10 00 00 00 00 00 00 00 00 01

CHG 9c 0a 9d 0f ff ff ff ff ff ff ff ff

DEF 80 06 00 00 07 00 00 00

CHG 80 06 b7 40 07 00 00 00

<--- Read capacity data --->

15 22 c4 40 00 00 02 00

48 Barracuda 180FC Product Manual, Rev. A

9.4 Miscellaneous operating features and conditions

Table 16 lists var ious features and con ditio ns. A “Y” in the support colum n indi cates the feature or con dition is
supported. An “N” in the support column indicates the feature or condition is not supported.

T a b l e 16: Miscella neo us fe atur es

Supported Feature or condition

Y FC-AL selective reset
Y Automatic contingent allegiance
N Asynchronous event notifi cat ion
N Synchronized (locked) spindle operation
Y Segmented caching
N Zero latency read
Y Queue tagging (up to 128 queue tags supported)
Y Deferred error handling
Y Parameter rounding (controlled by Round bit in Mode Select page 0)
Y Reporting actual retry count in Extended Sense bytes 15, 16, and 17
N Adaptive caching
Y SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes

T a b l e 17: Miscella neo us status

Supported Status

Y Good
Y Check condition
Y Condition met/good
YBusy
Y Intermediate/good
Y Intermediate/condition met/good
Y Reservation conflict

Y Task set full
NACA active
N ACA active, faulted initiator

Barracuda 180FC Product Manual, Rev. A 49

9.5 FC-AL physical interface

Figure 12 shows the locatio n of the J1 Fibre Channel s ingl e c onne ct ion attachment (FC-SCA) a nd th e J6 con­nector. Figure 14 provides the dimensions of the FC- SCA. Figure 15 provides the dimen sions of the J6 con­nector.

Details of the physical, elec trical, and logic al characterist ics are provided within this section. The ope rational
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 compa tible FC-AL devices. A maxi­mum of 127 devices may have addresses; however, one of the addresses is reserved for a fabric por t 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 functi onal because they would not be able to obtain valid
addresses.

Port bypass circuits (P BCs) allow devices to be ins er ted into unpopula ted locat ions or removed from the loop
with loop operation re covery after a bri ef interruptio n. These PBCs are located externa l to the FC-AL device.
Figure 13 shows the relationship between the PBC and FC-AL device.

Port Bypass

Circuit

From Previous

Port Bypass

Circuit NÐ1

Drive

MUX

To Next

Drive

Port Bypass

Circuit N+1

Drive NÐ1

SerialInSerial

Figure 13. Port bypass circuit physical interconnect

Select

Drive N

Out

Drive N+1

50 Barracuda 180FC Product Manual, Rev. A

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 illustrated in Figure 14. The J6 connector is illustrated 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

Barracuda 180FC Product Manual, Rev. A 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 18: FC-SCA pin descriptions

Pin Signal name Signal type Pin Signal name Signal type

1* -EN bypass port A Low Voltage

TTL output
2* 12 Volts 22 Ground
3* 12 Volts 23 Ground
4* 12 Volts 24* +Port A_in Diff. PECL input pair
5* -Parallel ESI 25* -Port A_in
6* Ground
7* Active LED out Open collector out 27* +Port B_in Diff. PECL input pair
8* Reserved 28* -Port B_in
9* Start_1 [2] TTL input 29 Ground
10* Start_2 [2] TTL input 30* +Port A_out Diff PECL output pair
11* -EN bypass port B Low Voltage

12* SEL_6 TTL input/output 3 2 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* DEV_CTRL_CODE_2

[2]

18* DEV_CTRL_CODE_1

[2]
19* 5 Volts 39 DEV_CTRL_CODE_0 [2] TTL input
20* 5 Volts 40 5 Volts charge

[1]

TTL output

TTL input 37 SEL_1 TTL input/output

TTL input 38 SEL_0 TTL input/output

21 12 Volts charge

26 Ground

31* -Port A_out

*Short pins in mating backpanel connector.
[1] This pin may be connected to external lo gic to detect the presence of the dr ive. The drive connects th is

pin to the common ground.

[2] Pins 9, 10, 17, 18, and 39 are option select pins and are tied high by the drive circuitry. The preferred elec-

trical connecti on a t the ba ckplane is ei ther ope n or grou nded (o pen for the ‘1’ setting, grounde d for the ‘0’
setting). Alternatively, these pins may be driven by a 3.3V logic device, pulled up to 3.3V through a pull-up
resistor (recommended size of 10K ohm), or grounded through some other means.

52 Barracuda 180FC Product Manual, Rev. A

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 support for +5 volts and + 12 volts. All of the voltage pins in the
drive connector are the same length.

Four 12 volt pins provide +12 volt power to the drive. The current return for the +12 volt power supply is through
the common ground p ins. The supply current and retur n 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 among the voltage and ground
pins.

The mating connector pins use shorter contacts to achieve power surge reductions and to aid in “hot plugging”
the drives. There are lo nger voltage contacts in the connector to enable the drive filt er capacitors to c harge.
Current to the drive through the long charg e pin s is li mi ted by the syst em 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. T w o 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 a n appropriate current-l imiting resistor. The LED and the current-li miting 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 19.

T a b le 19: 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 (command executing) Off
Spinning up or down Blinks steadily (50% on and 50% off)
Format in progress, each cylinder change Toggles on/off

Barracuda 180FC Product Manual, Rev. A 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 approp riate current limiting resisto r. The LED and the current limiting r esistor are
external to the drive.

9.5.9 Enable port bypass signals

The – Enable By pa ss Port A (– EN BYP Port A) and – Enable Bypass Port B (– EN BYP Port B) signals co nt rol
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 signal s are ac tive, low, the PBC bypasses the drive on the
associated por t. When an Enable Bypass s ignal is active, the correspo nding Port Bypass LED signal in c on­nector J1 is dri ven low by the disc drive. A pull down resistor, 1K, located with the PBC s hould be used to
insure the bypass is enabled if the disc drive is not installed.

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

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

• Transmitter/receiver wrap test failure

• Loss of receive clock

• Loss of transmission clock

• Drive interface hardware error

9.5.10 Motor start controls

The drive’s motor is started accor ding to the Star t_1 and Star t_2 signals descr ibed in Table 20. The state of
these signals can be wired into the backplane socket or driven by logic on the backplane.

Table 20: Motor start control signals

Case Start_2 Start_1 Motor spin function

1 Low Low Motor spins up at DC power on.
2 High Low Motor spins up only when SCSI Start command is received.
3 Low High Motor spins up after a delay of 12 seconds ti me s the mo dulo 8 value of

the numeric SEL ID of the drive from 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 lines de termi ne dr ive address, and, op tionally, for an Enclosure Servic es Inter­face. When the Parallel ESI line is high, the enclosure backpanel must provide address information on the SEL
line. Refer to table 21 for a mapping of SEL to FC-AL p hysical addresses (AL_ PA) . You can thin k of the SEL
lines as the equivalent of a backpanel logic plug. T he dr ives does not provid e pull up res istors on th ese lines.
The backpanel is required to provide high and low inputs to th e SEL_ID lines per the spe cifi cation s in table 23
on page 56 .

Note. Table 21 gives AL_PA values for each SEL value. The first entr y in the table 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 b eing ass igned u sing the SEL li nes an d that a “soft” address will be deter mined by
FC-AL loop initialization.

When the Parallel ESI line is low, the enclosure backpanel logic switches to ESI mode i f supported. There are
two modes of ESI, seven bits of enclosure status and a bidirec tional mode. ESI support and the mode ar e
determined by the dri ve using a discovery pr ocess. Refer to the Fibre Chan nel Inter face Manual for a descrip ­tion of ES I operation.

54 Barracuda 180FC Product Manual, Rev. A

9.5.11.1 Parallel Enclosure Services Interface (ESI)

The parallel ESI l ine is an output from the drive. This li ne provides the enclosure with an indi cation of the
present function of the SEL lines. A hi gh level, the default state, indi cates the dri ve requires addr ess in forma­tion on the SEL lines. A low level indicates the dr ive is attempti ng an ES I 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.

Barracuda 180FC Product Manual, Rev. A 55

T a b le 21: Arbitrated loop ph ysic al ad dres s (AL_PA) values

AL_PA
(hex)

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

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

56 Barracuda 180FC Product Manual, Rev. A

9.5.12 Device control codes

The drive inputs a Device Control Code on the DEV_CT RL_C ODE li nes at power up to determine the link rate
on the Fibre Channel p or t s. Both ports run at the s ame rate. If the ba ckpanel do es not co nnect t o these lines,
the drive has 10K ohm pull up resistors that default the device control code to 7 (1.0625 GHz). Table 22 lists the
suppor ted co des.

Table 22: Device control code values

2 (pin 17) 1 (pin 18) 0 (pin 39) Definition

0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1

0 Reserved for Power failure warning.
1 Reserved for auto negotiation of link rate.
0 Reserved.
1 Reserved.
0 Reserved.
1 Reserved.
0 2.125 GHz operation on both ports.
1 1.0625 GHz operation on both ports.

9.6 Signal characteristics

This section desc ribes the electr ic al si gn al cha rac teristics of the drive’s input and output signals. See Table 18
on page 51 for signal type and signal name information.

9.6.1 TTL input characteristics

Table 23 provides the TTL characteristics.

T a b le 23: TTL char acte 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 (-Par all el 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 other outputs) 0 < V

< 5.5V IIH = ±500nA max.

IH

< 0.9V IOL = ±500nA max.

IL

< 5.25V IOH < -3mA

OH

< 0.5V IOL < 3mA

OL

< 0.9 V

OH

< .45V IOL < 2.4mA

OL

< 0.9 V

OH

< .45V IOL < 1.6mA

OL

CC

CC

CC

CC

IOH < -2.4mA
I

< -500µA

OH

IOH < -1.6mA
I

< -500µA

OH

9.6.2 LED driver signals

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

T a b l e 24: LED drive signal

State Current drive available Output voltage

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

< 100µA

OH

< -30 mA 0 < VOL < 0.8V

OL

Barracuda 180FC Product Manual, Rev. A 57

9.6.3 Differential PECL output

The serial PECL output signal voltage characteristics are provided in T ab le 25. The outputs are not AC coupled
in order to deliver maximum signa l without r ise and fall time degradation . You must AC couple the receiver to
isolate potentially different DC characteristics of the outputs and the receiver.

Table 25: Differential PECL output charact eristics

Description Parameter

Serial output voltage swing 300 < V

< 650 mV

out

Figure 17 provides the data output valid eye diagram relative to the bit cell time. Table 27 lists the data values.

Bit Time

Vout (mv)

XMIT Eye

Figure 17. Transmit eye diagram

9.6.4 Differential PECL input

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

Table 26: Differential PECL input characteristics

Description Parameter Notes

Serial input voltage swing 400 < V

< 2.000 mV AC coupled

in

Figure 18 provides the d ata valid eye diagram for typical and mi nimum requirements to recover data at the
specified interface error rate. The inputs are AC coupled on the drive. Table 27 lists the data values.

Bit Time

Vin (mv)

RCV Eye

(typical)

(minimum)

Figure 18. Receive eye diagram

58 Barracuda 180FC Product Manual, Rev. A

Table 27: Eye diagram data values

Link rate
1 GHz 2 GHz

Bit time 941 ps 470 ps
XMIT eye 725 ps min. 315 ps min.

RCV eye

Typical 659 ps 305 ps
Minimum 395 ps 226 ps

Barracuda 180FC Product Manual, Rev. A 59

10.0 Seagate Technology support services Online Services

Internet

www.seagate.com for information abo ut Seagate products and s ervices. Worldwide suppor t is available 24

hours daily by e-mail for your disc or tape questions.

Presales Support:

Disc: www.seagate.com/support/email/email_presales.html or [e-mail].
Tape: www.seagate.com/support/email/email_tape_presales.html or [e-mail].

Technical Support:

Disc: www.seagate.com/support/email/email_disc_support.html or [e-mail] .
Tape: www.seagate.com/support/email/email_tape_support.html or [e-mail].
Server Appliance: www.seagate.com/support/email/email_nas_support.html or [e-mail].

Reseller Marketplace

Reseller Marketplace is the storage industry’s first collaborative, e-commerce marketplace offering res ellers
the fastest, most efficient online purcha sing process for Seagate storage so lutions. The Reseller Marketplace
at marketplace.seagate.com, an exclusive ser vice for US resellers partici pating in the Seagate Partner Pro­gram (SPP), is designed to streamline the purchasing process of Seagate solutions and provide unprece­dented value to Seagate’s resellers through real-time pricing and availability, fast and easy comparison
shopping, and seamless integration with key distributors for a one-stop shopping experience.

For support, q uestions and comments: resel ler.seagate.com/benefits/T1.htm l or 1-877-271-3285 (toll-fr ee) 9

A.M. to 7 P.M. (eastern time) Monday through Friday.

Tape Purchases

US customers can purc hase Seagate data cartri dges, tape supplies, accessories, and selec t Seagate tape
drive products 24 hours daily at buytape.seagate.com.

SeaBOARD

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

®

is a computer bulletin board sy st em tha t co ntai ns information about Seagate disc and tape drive

Automated Services

SeaFONE® (1-800-SEAGATE) is Seag ate’s toll-free number (1-800-732-42 83) to access our autom ated self-

help service s. Using a touch-tone phone, you can fin d answers to servic e phone numbers, commonly a sked
questions, troubleshooting tips and specifications for disc dri ves and tape drives 24 hours daily. International
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 tech nical

Presales Support

Presales Support

Our Presales Suppor t staff can he lp you determine whic h Seagate products are bes t suited for your specific
application or computer system.

60 Barracuda 180FC Product Manual, Rev. A

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 confl icts and other tec hnica l issues. If you need add ition al help, you can
talk to a Seagate tec hnical sup por t specia list. Before callin g, note your sy stem configurat ion and dr ive model
number (ST####).

SeaTDD™ ([phone]) is a te lecommuni cations device for the deaf (TDD). You can send ques tions or
comments 24 hours daily and exchange messages with a technical support specialist from 8:00
11:45

A.M. and 1:00 P.M. to 6:00 P.M. (central time) Monday through Friday.

A.M. to

Customer Service (CSO)

Warranty Service

Seagate offers worldwide customer supp or t for Seagate drives. Seagate direct OEM, Distri bution and System
Integrator customers should contact their Seagate service center representative for warranty information.
Other customers should contact their place of purchase.

Authorized Service Center s

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

USA/Canada/Latin America Support Services

Presales Support

Call Center Toll-free Direct dial FAX

Disc: 1-877-271-3285 [phone] [phone]
Tape: 1-800-626-6637 [phone] [phone]
Server Appliance: 1-800-732-4283 [phone] [phone]

Technical Support (SeaFONE)

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

SeaFAX 1-800-SEAGATE
SeaTDD [phone]
SeaBOARD Disc: [phone]; Tape: [phone]

Warranty Service

Call Center Toll-free Direct dial FAX / Internet

USA 1-800-468-3472 [phone] [phone]
Mexico and Latin America — [phone] [phone]
Canada

Memofix

Adtech* 1-800-624-9857 [phone] or [phone]

Brazil

MA Centro de Serviços* — [phone] [phone]

1

1-800-636-6349 [phone] or [phone]

www.memofix.com

www.adtech1.com

e-mail: [e-mail]

1.Authorized Service Centers

Barracuda 180FC Product Manual, Rev. A 61

European Support Services

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

If your country is not liste d here, dial our Eu ropea n call c enter at + 31-20-3 16-7222 from 8 :30
(European central time) Mon day through Friday. The European call cen ter is lo ca ted i n A ms ter dam , The Ne th­erlands.

Call Center

Austria 0 800-20 12 90
Belgium 0 800-74 876
Denmark 80 88 12 66
France 0 800-90 90 52
Germany 0 800-182 6831
Ireland 1 800-55 21 22
Italy 800-790695
Netherlands 0 800-732 4283
Norway 800-113 91
Poland 00 800-311 12 38
Spain 900-98 31 24
Sweden 0 207 90 073
Switzerland 0 800-83 84 11
Turkey 00 800-31 92 91 40
United Kingdom 0 800-783 5177

A.M. to 5:00 P.M.

SeaBOARD

Germany [phone]

Fax Services—All European Countries

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

Africa/Middle East Support Services

For presales, technical suppor t, warranty service and FAX services in Africa and the Middle East, dial our
European call ce nter at [phone] fr om 8:3 0
Friday, or send a FAX to [phone]. The Eu ropean call center is lo cated in Amsterdam, The Nether­lands.

A.M. to 5:00 P.M. (European central ti me) Monday throug h

Asia/Pacific Support Services

For Asia/Pacific presales and technical suppor t, dial the toll-free number for your specific co untry. The Asia/
Pacific toll-free numbers are available from 6:00
ern time) Monday through Friday. If your country is not listed here, direct dial one of our technical support loca­tions.

Call Center Toll-free Direct dial FAX

Australia 1800-14-7201 ——
China ——[phone]
Hong Kong 800-90-0474 — [phone]
Indonesia 001-803-1-003-2165 ——
Japan ——[phone]
Malaysia 1-800-80-2335 ——
New Zealand 0800-443988 ——
Singapore 800-1101-150 [phone] [phone]
Taiwan — [phone] [phone]
Thailand 001-800-11-0032165 ——

A.M. to 10:45 A.M. and 12:00 P.M. to 6:00 P.M. (Australian east-

62 Barracuda 180FC Product Manual, Rev. A

Warranty Service

Call Center Toll-free Direct dial FAX

Asia/Pacific — [phone] [phone]
Australia 1800-12-9277 ——
Japan — [phone] [phone]

Barracuda 180FC Product Manual, Rev. A 63

Index

Numerics

12 volt

pins 52
3rd party reserve command 43
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 6

assembly design 5
adaptive caching 48
Address Discovery (ADISC) 35
addresses 49
air cleanliness 26
air flow 22, 32, 33

illustrated 33
air inlet 33
Alternate credit model 36, 39
altitude 23
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
Australia/New Zealand Standard 4
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 (B A_ AC C) 35
Basic_Reject (BA_RJT) 35
BB 36, 39
BB-Credit 36, 39
buffer

data 6

space 11
busy status 48
bypass circuit 15
Byte check command 42
bytes per surface 9
bytes per track 9

C

cache operation 11
cache segments 11
Caching parameters page (08h) command 41
caching write data 11
Canadian Department of Communications 3
capacity

formatted 7

unformatted 7, 9
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 ACA function 35
clear task set function 35
commands supported 41
Common features 36, 39
Compare command 42
Concurrent sequences 36
condensation 23
condition met/good status 48
connector

illustrated 50

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

error 13
CS 36
Current profiles 20
customer service 18

D

data block size

modifing the 7
data buffer to/from disc media 10
data heads

read/write 9
data rate

internal 9

64 Barracuda 180FC Product Manual, Rev. A

data transfer rate 10
data valid eye 57
Date code page command 41
DC power 51

requirements 19
defect and error management 29
deferred error handling 48
description 5
DEV_CTRL_CODE 56
device behavior page command 41
device control code values 56
device control codes 56
device identification page command 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

41
Download microcode and save modes (5) 42
Download microcode mode (4) 42
Download microcode with offsets and save mode (7)

42
Download microcode with offsets mode (6) 42
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
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

interference 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
extended link service

frames 35

reply frames 35
Extended sense command 41
Extent reservation command 43

F

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

document 4

interface 31, 51

options supported 40

physical interface 49

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

interface 35
Fibre Channel documents 4
Fibre Channel interface control page 41
Fibre Channel Interface Manual 1, 4
Fibre Channel Services 35
Field pointer bytes command 41
firmware 6

corruption 44
Firmware download option command 42
Firmware numbers page command 41
flawed sector reallocation 6
FLOGI

received on Port A 38

received on Port B 38
Force unit access command 42
form factor 6
format 31
Format command execution time 9
Format page (03h) command 41

Barracuda 180FC Product Manual, Rev. A 65

Format unit command 41
front panel 27
FS 36, 37, 39
function

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

G

Good status 48
gradient 23
ground shift noise 52
grounding 34

H

hard assigned arbitrated loop phys ic al add re ss

(AL_PA) 31
HDA 32, 33, 34
HDA case temperature 22
head and disc assembly (HDA) 5
head and disc assembly. See HDA
heads

read/write data 9
heat removal 32
heat source 33
host equipment 34
hot plugging the drive 15
humidity 23
humidity limits 22

I

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

41
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 49
requirements 35

interleave 6

minimum 10
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

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 rate 56
Link Service Reject (LS_RJT) 35
link services supported 35
Lock-unlock-cache command 42
Log select command 43
Log sense command 43
logic power 52
logical block address 11
logical block realloc ati on scheme 6
logical block size 6, 10
logical segments 11
Logout (LOGO) 35
loop 49, 53

disruption 15

initialization 31
loop position

FC-AL options 40
loop position report

FC-AL options 40
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 10
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

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

66 Barracuda 180FC Product Manual, Rev. A

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 full 48
miscorrected media data 13
Mode select

(10) command 43

command 41
Mode sense

(10) command 43

command 41

data, table 45, 47
monitoring state 15
motor start

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-operating 23, 24, 26

temperature 23
non-operating vibration 26

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 36
operating 23, 26
option configuration s 31
option selection 51
options 7, 40

orientation 23
OS 36
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 24
package test specification 4
packaged 24
parameter rounding 48
pass-through state 15
PBC 49, 53
PBdata 43
PCBA 34
peak bits per inch 9
peak operating current 19
peak-to-peak measurements 20
PECL input 57
performance charact eris tic s

detailed 9

general 10
performance degradation 24
performance highligh ts 6
physical damage 26
physical interface 49

description 49
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

requirements, AC 19

requirements, DC 19

sequencing 20
Power control page (1Ah) command 41
power distribution 3
Prefetch command 42
prefetch/multi-segmented cache control 10
preventive maintenance 13
private loop

FC-AL options 40
Proc Assc 36

Barracuda 180FC Product Manual, Rev. A 67

Process Accept (ACC) 37
Process Login (PRLI) 35, 37
Process Login Accept (ACC) payload 37
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 11
Read buffer command 42
Read capacity command 42
Read combined header and data mode (0) 42
Read command 41
Read data mode (2) 42
Read defect data command 42
Read descriptor mode (3) 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 41
receive eye

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

documents 4
Regenerate command 43
Register FC-4 Types (RFT_ID) 35
Relative address command 42
relative humidity 23
Release command 41
Released (10) command 43
reliability 6

and service 14

specifications 13
repair and return information 18
reporting actual retry count 48
Request sense command 41
reservation conflict status 48
Reserve command 41
Reserved (10) command 43
resonance 23
return information 18
Rezero unit command 41

Rigid disc drive geometry page

command 41
rotation speed 9
running disparity 15

S

safety 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 stroke typical 9

single track typical 9
segmented caching 48
SEL ID 31

lines 53

standard feature 6
Self-Monitoring Analysis and Reporting Technology

7, 15
Send diagnostics page co mma nd 42
Sequential delivery 36, 39
service

life 13, 14
philosophy 14

tools 14
Service Options 39
Service options 36
Set limits command 42
shielding 3
shipping 18
shipping container 23
shock 23, 24

and vibration 23
shock mount 34
signal

characteristics 56

LED driver 56
single-unit shipping pack kit 7
SMART 7, 15
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 41

68 Barracuda 180FC Product Manual, Rev. A

start/stop time 10
support services 59
Supported diagnostics pages command 41, 42
surface stiffness

allowable for non-flat surface 33
switches 31
Synchronize cache comma nd 42
synchronized spind le

operation 48
system chassis 34

T

target reset function 35
task management functions 35

Abort task set 35

Clear ACA 35

Clear task set 35

Target reset 35

terminate task 35
task management response codes 35

Function complete 00 35

Function not supported 05 35

Function reject 04 35
task set full status 48
technical support services 59
temperature 22, 32

ambient 22

case 22

gradient 22

limits 22

non-operating 23

regulation 3

See also cooling
terminate task function 35
terminators 31
Test unit ready command 41
Third-party Process Logout (TRPLO) 35
tracks per inch 9
tracks per surface 9
Translate page command 42
transmit eye diagram 57
transmitters 52
transporting the drive 18
TTL input characteristics 56

V

Valid version level 36, 39
Verify command 42
Verify error recovery page (07h) command 41
vibration 23, 26
Vital product data page command 41

W

warranty 18
word sync 15
Write and verify command 42
Write buffer command 42
Write combined header and data mode (0) 42
Write command 41
Write data mode (2) 42
write errors 13
Write extended command 42
Write long command 43
Write same command 43

X

XD read 43
XD write 43
XD write extended command 43
XID reassign 36
XP write 43

Z

zero latency read 48
zone bit recording (ZBR) 6

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

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

Publication Number: 100107693, Rev. A, Printed in USA