Seagate 15K.3 - Cheetah - Hard Drive Product Manual

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Cheetah 15K.3 FC Disc Drive

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ST373453FC

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ST336753FC

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ST318453FC

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Product Manual, Volume 1

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Cheetah 15K.3 FC Disc Drive

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ST373453FC

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ST336753FC

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ST318453FC

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Product Manual, Volume 1

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© 2002, 2003 Seagate Technology LLC. All rights reserved. Printed in the USA.
March 2003

Publication number: 100148129, Rev. D

Seagate, Seagate Technology, and the Seagate logo are registered trademarks or trademarks of Seagate
Technology LLC. Cheetah, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are registered trademarks or trade­marks 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.

Revision status summary sheet

Revision Date Writer/Engineer Sheets Affected

Rev. A 05/03/2002 K. Schweiss/B. Hohn 1/1, v-vii, and 1-74.
Rev. B 07/08/2002 K. Schweiss/B. Hohn 1/1, v-vii, and 1-74.
Rev. C 11/26/2002 K. Schweiss/B. Hohn Front and back covers, and 9.
Rev. D 03/03/2003 K. Schweiss/B. Hohn 13 and 32.

Cheetah 15K.3 FC Product Manual, Rev. D v

Contents

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

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

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

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

2.1.2 Electromagnetic 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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 (minutes) . . . . . . . . . . . . . 9

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

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

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

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

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

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

5.1.2 Environmental interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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

5.1.4 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

5.2.8 Thermal monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.9 Drive Self Test (DST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.10 Product warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

6.0 Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.1 AC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.2 DC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.2.1 Conducted noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.2.2 Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.2.3 Current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.3 Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.4 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

vi Cheetah 15K.3 FC Product Manual, Rev. D

6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

6.4.6 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

6.4.7 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

6.5 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

7.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

7.1 Drive internal defects/errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

7.2 Drive error recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

7.3 FC-AL system errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

8.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

8.1 Drive ID/option selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

8.2 LED connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

8.2.1 J6 connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

8.3 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

8.4 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

8.5 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

8.6 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

9.0 Interface requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

9.1 FC-AL features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

9.1.1 Fibre Channel link service frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

9.1.2 Fibre Channel task management functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

9.1.3 Fibre Channel task management responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

9.1.4 Fibre Channel port login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

9.1.5 Fibre Channel port login accept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.1.6 Fibre Channel Process Login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.1.7 Fibre Channel Process Login Accept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.1.8 Fibre Channel fabric login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

9.1.9 Fibre Channel fabric accept login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

9.1.10 Fibre Channel Arbitrated Loop options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

9.2 Dual port support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

9.3 SCSI commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

9.3.1 Inquiry data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.3.2 Mode Sense data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

9.4 Miscellaneous operating features and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

9.5 FC-AL physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

9.5.1 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

9.5.2 Connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

9.5.3 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

9.5.4 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

9.5.5 FC-AL transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

9.5.6 Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

9.5.7 Fault LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

9.5.8 Active LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

9.5.9 Enable port bypass signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

9.5.10 Motor start controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

9.5.11 SEL_6 through SEL_0 ID lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

9.5.12 Device control codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

9.6 Signal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

9.6.1 TTL input characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

9.6.2 LED driver signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

9.6.3 Differential PECL output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

9.6.4 Differential PECL input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

10.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Cheetah 15K.3 FC Product Manual, Rev. D ix

List of Figures

Figure 1. Cheetah 15K.3 FC family disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Typical ST373453FC drive +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 3. Typical ST373453FC drive +5V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 4. Typical ST336753FC drive +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 5. Typical ST336753FC drive +5V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 6. Typical ST318453FC drive +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 7. Typical ST318453FC drive +5V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 8. ST373453FC DC current and power vs. input/output operations per second . . . . . . . . . . . . 26

Figure 9. ST336753FC DC current and power vs. input/output operations per second . . . . . . . . . . . . 26

Figure 10. ST318453FC DC current and power vs. input/output operations per second . . . . . . . . . . . . 27

Figure 11. Locations of the HDA temperature check point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 12. Recommended mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 13. Mounting configuration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 14. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 15. LED indicator connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 16. Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 17. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 18. Port bypass circuit physical interconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 19. FC-AL SCA device connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 20. J6 connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 21. FC-AL transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Figure 22. Transmit eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 23. Receive eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Cheetah 15K.3 FC Product Manual, Rev. D 1

1.0 Scope

This manual describes Seagate Technology® LLC, Cheetah® 15K.3 FC (Fibre Channel) disc drives.

Cheetah 15K.3 FC drives support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifi­cations to the extent described in this manual. The
describes the general Fibre Channel Arbitrated Loop characteristics of this and other Seagate Fibre Channel
drives.

Figure 1. Cheetah 15K.3 FC family disc drive

Fibre Channel Interface Manual

(part number 77767496)

2 Cheetah 15K.3 FC Product Manual, Rev. D

Cheetah 15K.3 FC Product Manual, Rev. D 3

2.0 Applicable standards and reference documentation

The drive has been developed as a system peripheral to the highest standards of design and construction. The
drive depends upon its host equipment to provide adequate power and environment in order to achieve opti­mum performance and compliance with applicable industry and governmental 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 securely mounted in order to guarantee the specified performance char­acteristics. Mounting by bottom holes must meet the requirements of Section 8.5.

2.1 Standards

The Cheetah 15K.3 FC family complies with Seagate standards as noted in the appropriate sections of this
manual and the Seagate

The Cheetah 15K.3 FC 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 supplied as a subassembly and is not subject to Subpart B of Part 15 of the FCC Rules
and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications.

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

Fibre Channel Interface Manual

, part number 77767496.

2.1.1.1 Electromagnetic susceptibility

As a component assembly, the drive is not required to meet any susceptibility performance requirements. It is
the responsibility of those integrating the drive within their systems to perform those tests required and design
their system to ensure that equipment operating in the same system as the drive or external to the system
does not adversely affect the performance of the drive. See Section 5.1.2 and Table 2, DC power requirements.

2.1.2 Electromagnetic compliance

Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking
and C-Tick Marking. The drive was tested in a representative system for typical applications. The selected sys­tem represents the most popular characteristics for test platforms. The system configurations include:

• 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 integrator shall confirm EMC compliance
and provide the appropriate marking for their product.

Electromagnetic compliance for the European Union

If this model has the CE Marking it complies with the European Union requirements of the Electromagnetic
Compatibility Directive 89/336/EEC of 03 May 1989 as amended by Directive 92/31/EEC of 28 April 1992 and
Directive 93/68/EEC of 22 July 1993.

4 Cheetah 15K.3 FC Product Manual, Rev. D

Australian C-Tick

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

Korean MIC

If this model has the Korean Ministry of Information and Communication (MIC) logo, it complies with paragraph
1 of Article 11 of the Electromagnetic Compatibility (EMC) Control Regulation and meets the Electromagnetic
Compatibility Framework requirements of the Radio Research Laboratory (RRL) Ministry of Information and
Communication Republic of Korea.

Taiwanese BSMI

If this model has two Chinese words meaning “EMC certification” followed by an eight digit identification num­ber, as a Marking, it complies with Chinese National Standard (CNS) 13438 and meets the Electromagnetic
Compatibility (EMC) Framework requirements of the Taiwanese Bureau of Standards, Metrology, and Inspec­tion (BSMI).

2.2 Reference documents

Cheetah 15K.3 FC Installation Guide

Seagate part number: 100148127

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.

Cheetah 15K.3 FC Product Manual, Rev. D 5

3.0 General description

Cheetah 15K.3 FC drives combine giant magnetoresistive (GMR) heads, partial response/maximum likelihood
(PRML) read channel electronics, embedded servo technology, and a Fibre Channel interface to provide high
performance, high capacity data storage for a variety of systems including engineering workstations, network
servers, mainframes, and supercomputers. Cheetah 15K.3 FC drives also support 2-Gbit Fibre Channel which
can transfer data at up to 200 Mbytes per second and 400 Mbytes per second in dual-loop configurations.

Cheetah 15K.3 FC drives are random access storage devices designed to support the Fibre Channel Arbi­trated Loop (FC-AL) and SCSI Fibre Channel Protocol as described in the ANSI specifications, this document,
and the
acteristics of this drive. Cheetah 15K.3 FC drives are classified as intelligent peripherals and provide level 2
conformance (highest level) with the ANSI SCSI-1 standard.

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

Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actua­tor, etc.) as this requires special facilities. The drive does not contain user-replaceable parts. Opening the HDA
for any reason voids your warranty.

Cheetah 15K.3 FC drives use a dedicated landing zone at the innermost radius of the media to eliminate the
possibility of destroying or degrading data by landing in the data zone. The heads automatically go to the land­ing zone when power is removed from the drive.

Fibre Channel Interface Manual

(part number 77767496) which describes the general interface char-

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

Cheetah 15K.3 FC 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 Cheetah 15K.3 FC Product Manual, Rev. D

3.1 Standard features

Cheetah 15K.3 FC drives have the following standard features:

• 2-Gbit Fibre Channel interface. For 2 gigabit operation, the block size must be divisable by 8.

• 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.

• Supports SCSI Enclosure Services through the interface connector

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

• User-selectable logical block size (512 to 528 bytes per logical block). For 2 gigabit operation, the block size
must be divisable by 8.

• Selectable frame sizes from 256 to 2,112 bytes

• Industry standard 3.5-inch low profile form factor dimensions

• Programmable logical block reallocation scheme

• Flawed logical block reallocation at format time

• Programmable auto write and read reallocation

• Reed-Solomon error correction code

• Sealed head and disc assembly (HDA)

• No preventive maintenance or adjustments required

• Dedicated head landing zone

• Automatic 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

• 8,192 Kbyte data buffer (see Section 4.5).

• Embedded servo design

• Reallocation of defects on command (Post Format)

• Fibre Channel interface transports SCSI protocol

3.2 Media description

The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated
with a proprietary protective layer for improved durability and environmental protection.

3.3 Performance

• Programmable multi-segmentable cache buffer

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

• 15k RPM spindle; average latency = 2.0 msec

• Command queuing of up to 128 commands

• Background processing of queue

• Supports start and stop commands

• Adaptive seek velocity; improved seek performance

Cheetah 15K.3 FC Product Manual, Rev. D 7

3.4 Reliability

• 1,200,000 hour MTBF

• LSI circuitry

• Balanced low mass rotary voice coil actuator

• 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 (LBAs) per sparing zone. The following table shows the
standard OEM model capacity:

Formatted Unformatted

ST373453FC 088BB998h (73.4 Gbytes) 96.4 GB
ST336753FC 0445DCCCh (36.7 Gbytes) 48.2 GB
ST318453FC 0222EE66h (18.4 Gbytes) 24.1 GB

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.

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

The sector size is selectable at format time. Users having the necessary equipment may modify the data block
size before issuing a format command and obtain different formatted capacities than those listed. Cheetah
15K.3 FC drives use a zone sparing scheme. The drive is divided into frequency zones with a variable number
of spares in each zone.

3.6 Programmable drive capacity

Using the Mode Select command, the drive can change its capacity to something less than maximum. See the
Mode Select (6) parameter list table in the

Fibre Channel Interface Manual

, part number 7767496. A value of
zero in the Number of Blocks field indicates that the drive will not change the capacity it is currently formatted
to have. A number other than zero and less than the maximum number of LBAs in the Number of Blocks field
changes the total drive capacity to the value in the Number of Blocks field. A value greater than the maximum
number of LBAs is rounded down to the maximum capacity.

3.7 Factory-installed accessories

OEM standard drives are shipped with the

Cheetah 15K.3 FC Installation Guide

(part number 100148127).

3.8 Factory-installed options

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

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

• Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection

against transit damage. Units shipped individually require additional protection as provided by the single unit
shipping pack. Users planning single unit distribution should specify this option.

• The

Cheetah 15K.3 FC Installation Guide,

part number 100148127, is usually included with each standard

OEM drive shipped, but extra copies may be ordered.

• The

Safety and Regulatory Agency Specifications

, part number 75789512, is usually included with each

standard OEM drive shipped, but extra copies may be ordered.

3.9 User-installed accessories

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

• Evaluation kit, part number 73473641.

This kit provides an adapter card (“T-card”) to allow cable connections for two FC ports and DC power.

• Single-unit shipping pack.

8 Cheetah 15K.3 FC Product Manual, Rev. D

Cheetah 15K.3 FC Product Manual, Rev. D 9

4.0 Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of
Cheetah 15K.3 FC drives.

4.1 Internal drive characteristics

ST373453FC ST336753FC ST336753FC

Drive capacity 73.4 36.7 18.4 Gbytes (formatted, rounded off value)
Read/write data heads 8 4 2
Bytes per track 377,770 377,770 377,770 Bytes (average, rounded off values)
Bytes per surface 12,046 12,046 12,046 Mbytes (unformatted, rounded off value)
Tracks per surface (total) 31,310 31,310 31,310 Tracks (user accessible)
Tracks per inch 64,000 64,000 64,000 TPI
Peak bits per inch 542 542 542 KBPI
Internal data rate 609-891 609-891 609-891 Mbits/sec (variable with zone)
Disc rotation speed 15k 15k 15k rpm
Avg rotational latency 2.0 2.0 2.0 msec

4.2 Seek performance characteristics

See Section 9.5, "FC-AL physical interface" on page 55 and the

Fibre Channel Interface Manual

(part number

77767496) for additional timing details.

4.2.1 Access time

Including controller overhead
(msec)

Read Write Read Write

Average Typical
Single track Typical
Full stroke Typical

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 and applies to all data transfer commands.

Access to data = access time + latency time.

3,4

3,4

3,4

3.8 4.1 3.6 3.9

0.40 0.60 0.20 0.40

6.7 7.1 6.5 6.9

1, 2

Not including controller overhead
(msec)

1,2

4.2.2 Format command execution time for ≥ 512-byte sectors (minutes)

ST373453FC ST336753FC ST318453FC

Maximum (with verify)

Maximum (without verify)

90 60 30
45 30 15

10 Cheetah 15K.3 FC Product Manual, Rev. D

4.2.3 General performance characteristics

Minimum sector interleave 1 to 1

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

Minimum 51.8 MBytes/sec
Maximum 86.0 MBytes/sec

Fibre Channel Interface maximum instantaneous transfer rate 200 Mbytes/sec* per

port (dual port = 400
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 (for flaws reallocated at format time
using the spare sectors per sparing zone reallocation scheme.)

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.

Ye s

Negligible

2.0 msec

4.3 Start/stop time

If the Motor Start option is disabled, the drive becomes ready within 20 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 20 seconds. Stop time is 30 seconds (maximum) from removal of DC
power.

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

Interface Manual

less than 3 seconds after DC power has been applied. After the Motor Start command has

Fibre Channel

been received, the drive becomes ready for normal operations within 20 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 control algorithms that in many
cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in
cache operations. To select this feature, the host sends the Mode Select command with the proper values in
the applicable bytes in page 08h. Prefetch and cache operations are independent features from the standpoint
that each is enabled and disabled independently using the Mode Select command; however, in actual opera­tion, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.

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

4.5 Cache operation

Note. Refer to the

Fibre Channel Interface Manual

for more detail concerning the cache bits.

Cheetah 15K.3 FC Product Manual, Rev. D 11

Of the 8,192 kbytes physical buffer space in the drive, approximately 7,500 kbytes 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 stored in each segment of the buffer. If the
cache is enabled (see RCD bit in the

Fibre Channel Interface Manual

), data requested by the host with a read
command is retrieved from the buffer, if possible, before any disc access is initiated. If cache operation is not
enabled, the buffer (still segmented with the required number of segments) is still used, but only as circular
buffer segments during disc medium read operations (disregarding Prefetch operation for the moment). That is,
the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to
retrieve it. The retrieved data merely passes through some buffer segment on the way to the host. On a cache
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 logical block is reached that is not in any cache segment, the drive fetches it and any

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

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

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

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

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

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

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

Each cache segment is actually a self-contained circular buffer whose length is an integer number of logical
blocks. The wrap-around capability of the individual segments greatly enhances the cache’s overall perfor­mance, allowing a wide range of user-selectable configurations. The drive supports operation of any integer
number of segments from 1 to 16. Divide the 7,500 Kbytes in the buffer by the number of segments to get the
segment size. Default is 3 segments.

Note. The size of each segment is not reported by Mode Sense command page 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 Select command (bytes 14 and 15) does not set up a new segment size. If the
STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt
to change an unchangeable parameter.

4.5.1 Caching write data

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

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

If the number of write data logical blocks exceed the size of the segment being written into, when the end of the
segment is reached, the data is written into the beginning of the same cache segment, overwriting the data that

12 Cheetah 15K.3 FC Product Manual, Rev. D

was written there at the beginning of the operation; however, the drive does not overwrite data that has not yet
been written to the medium.

If write caching is enabled (WCE=1), then the drive may return Good status on a write command after the data
has been transferred into the cache, but before the data has been written to the 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 16 shows the mode default settings for the drive.

4.5.2 Prefetch operation

If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately beyond that which
was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer
to the host on subsequent Read commands that request those logical blocks (this is true even if cache opera­tion is disabled). Though the prefetch operation uses the buffer as a cache, finding the requested data in the
buffer is a prefetch hit, not a cache operation hit.

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

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

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

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

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 respond quickly to repetitive accesses of multiple small segments of data
without taking the time to “look ahead” to the next contiguous segments of data. In a server environment, you
want to configure the cache to provide large volumes of sequential data in a non-repetitive manner. In this
case, the ability of the cache to “look ahead” to the next contiguous segments of sequential data is a good
thing.

The Performance Mode (PM) bit controls the way the drive switches the cache buffer into different modes of
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 (unless changed by using a Mode Select command). For additional information about the PM bit, refer to
the Unit Attention Parameters page (00h) of the Mode Sense command (1Ah) in the

Product Manual

, part number 77767496.

Fibre Channel Interface

Cheetah 15K.3 FC Product Manual, Rev. D 13

5.0 Reliability specifications

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

Seek error rate:

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 63
MTBF: 1,200,000 hours
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

13

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.

5.1.1 Interface errors

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

5.1.2 Environmental interference

When evaluating systems operation under conditions of electromagnetic interference (EMI), the performance
of the drive within the system is considered acceptable if the drive does not generate an unrecoverable condi­tion.

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

• is not detected and corrected by the drive itself

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

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

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

5.1.4 Seek errors

A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an
initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails,
a seek positioning error (15h) is reported with a Hardware error (4h) reported in the Sense Key. This is an unre-

14 Cheetah 15K.3 FC Product Manual, Rev. D

coverable seek error. Unrecoverable seek errors are classified as 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 enhance the reliability of Cheetah 15K.3 FC disc drives by ensuring that the drive receives adequate
cooling. Section 6.0 provides recommended air-flow information, temperature measurements, and other 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 specified in Section 6.4.1 are not exceeded. Short-term excursions up to the
specification limits of the operating environment will not affect MTBF performance. Operating the 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 measurement period = Estimated power-on operating hours in the period

Number of drive failures in the period

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

MTBF is based on the following assumptions:

• 8,760 power-on hours per year

• 250 average on/off cycles per year

• Operating at nominal voltages

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

Drive failure means any stoppage or failure to meet defined specifications caused by drive malfunction.

A S.M.A.R.T. predictive failure indicates that the drive is deteriorating to an imminent failure and is considered
an MTBF hit.

5.2.2 Preventive maintenance

No routine scheduled preventive maintenance is required.

5.2.3 Service life

Depot repair or replacement of major parts is permitted during the service lifetime.

5.2.4 Service philosophy

Special equipment is required to repair the drive HDA. Repairs must be performed only at a properly equipped
and staffed Seagate service and repair facility. Troubleshooting and repair of PCBs in the field is not recom­mended because of the extensive diagnostic equipment required 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 required for site installation or recommended for site maintenance. Refer to Section 5.2.4.
The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not
practical because users cannot purchase individual parts for the drive.

5.2.6 Hot plugging the drive

Inserting and removing the drive on the FC-AL will interrupt loop operation. The interruption occurs when the
receiver of the next device in the loop must synchronize to a different input signal. FC error detection mecha-

Cheetah 15K.3 FC Product Manual, Rev. D 15

nisms, character sync, running disparity, word sync, and CRC are able to detect any error. Recovery is initiated
based on the type of error.

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

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

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

If the self-test fails, the control line to the bypass circuit remains in the Enable Bypass state.

Note. It is the responsibility of the systems integrator to assure that no temperature, energy, voltage hazard,

or ESD potential hazard is presented during the hot connect/disconnect operation. Discharge the static
electricity from the drive carrier prior to inserting it into the system.

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

required to insure data integrity.

5.2.7 S.M.A.R.T.

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

Note. The drive’s firmware monitors specific attributes for degradation over time but can’t predict instanta-

neous drive failures.

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

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 the DEXCPT bit to enable or disable the S.M.A.R.T. feature. Setting the DEX­CPT bit disables all S.M.A.R.T. functions. When enabled, S.M.A.R.T. collects on-line data as the drive performs
normal read and write operations. When the PERF bit is set, the drive is considered to be in “On-line Mode
Only” and will not perform off-line functions.

You can measure off-line attributes and force the drive to save the data by using the Rezero 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 command
resets the timer.

Performance impact

S.M.A.R.T. attribute data is saved to the disc so that the events that caused a predictive failure can be recre­ated. The drive measures and saves parameters once every two hours subject to an idle period on the FC-AL

16 Cheetah 15K.3 FC Product Manual, Rev. D

bus. The process of measuring off-line attribute data and saving data to the disc is uninterruptable. The maxi­mum on-line only processing delay is summarized below:

Maximum processing delay

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

Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). Subject to
the reporting method, the firmware will issue to the host an 01-5Dxx sense code. The error code is preserved
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 interval defines the number of operations over which to measure the
rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter.

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

Error rate is the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to
set thresholds for the number of errors and their interval. If the number of errors exceeds the threshold before
the interval expires, the error rate is considered to be unacceptable. If the number of errors does not exceed
the threshold before the interval expires, the error rate is considered to be acceptable. In either case, the inter­val and failure counters are reset and the process starts over.

Predictive failures

S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. The firm­ware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accom­plish this, a counter is incremented each time the error rate is unacceptable and decremented (not to exceed
zero) whenever the error rate is acceptable. If the counter continually increments such that it reaches the pre­dictive threshold, a predictive failure is signaled. This counter is referred to as the Failure History Counter.
There is a separate Failure History Counter for each attribute.

5.2.8 Thermal monitor

Cheetah 15K.3 FC drives implement a temperature warning system which:

1. Signals the host if the temperature exceeds a value which would threaten the drive.

2. Signals the host if the temperature exceeds a user-specified value.

3. Saves a S.M.A.R.T. data frame on the drive which exceeds the threatening temperature value.

A temperature sensor monitors the drive temperature and issues a warning over the interface when the tem­perature exceeds a set threshold. The temperature is measured at power-up and then at ten-minute intervals
after power-up.

The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the speci­fied limit in compliance with the SCSI standard. The drive temperature is reported in the FRU code field of
mode sense data. You can use this information to determine if the warning is due to the temperature exceeding
the drive threatening temperature or the user-specified temperature.

This feature is controlled by the Enable Warning (EWasc) bit, and the reporting mechanism is controlled by the
Method of Reporting Informational Exceptions field (MRIE) on the Informational Exceptions Control (IEC)
mode page (1Ch).

The current algorithm implements two temperature trip points. The first trip point is set at 65°C which is the
maximum temperature limit according to the drive specification. The second trip point is user-selectable using

Cheetah 15K.3 FC Product Manual, Rev. D 17

the Log Select command. The reference temperature parameter in the temperature log page (see Table 1) can
be used to set this trip point. The default value for this drive is 65°C, however, you can set it to any value in the
range of 0 to 65°C. If you specify a temperature greater than 65°C in this field, the temperature is rounded
down to 65°C. A sense code is sent to the host to indicate the rounding of the parameter field.

Table 1: Temperature Log Page (0Dh)

Parameter Code Description

0000h

0001h

Primary Temperature

Reference Temperature

5.2.9 Drive Self Test (DST)

Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify 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 performs various tests on the drive and scans every logical
block address (LBA) of the drive. The short test is time-restricted and limited in length—it does not scan the
entire media surface, but does some fundamental tests and scans portions of the media.

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

5.2.9.1 DST failure definition

The drive will present a “diagnostic failed” condition through the self-tests results value of the diagnostic log
page if a functional failure is encountered during DST. The channel and servo parameters are not modified 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 failure condition will be reported regardless of the number
of retries required to recover the data.

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.

5.2.9.2 Implementation

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

5.2.9.2.1 State of the drive prior to testing

The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons
why a drive may not be ready, some of which are valid conditions, and not errors. 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

18 Cheetah 15K.3 FC Product Manual, Rev. D

In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.

5.2.9.2.2 Invoking DST

To invoke DST, submit the Send Diagnostic command with the appropriate Function Code (001b for the short
test or 010b for the extended test) in bytes 1, bits 5, 6, and 7.

5.2.9.2.3 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 consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan
segment.

Short test (Function Code: 001b)

The purpose of the short test is to provide a time-limited test that tests as much of the drive as possible within
120 seconds. The short test does not scan the entire media surface, but does some fundamental tests 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 positioning mechanism. The read operation tests the read head element
and the media surface. The write element is tested through read/write/read operations. The integrity of the
media is checked through a read/verify scan of the media. Motor functionality is tested by default as a part of
these tests.

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

5.2.9.2.4 Log page entries

When the drive begins DST, it creates a new entry in the Self-test Results Log page. The new entry 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 more than 20 parameter blocks, the least recent parameter 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-Test Results Value field in its Self­Test Results Log page in non-volatile memory. The host may use Log Sense to read the results from up to the
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 set to zero, the drive passed with no errors detected by the DST. If the field is not set to zero,
the test failed for the reason reported in the field.

The drive will report the failure condition and LBA (if applicable) in the Self-test Results Log parameter. The
Sense key, ASC, ASCQ, and FRU are used to report the failure condition.

5.2.9.2.5 Abort

There are several ways to abort a diagnostic. You can use a SCSI Bus Reset or a Bus Device Reset message
to abort the diagnostic.

You can abort a DST executing in background mode by using the abort code in the DST Function Code field.
This will cause a 01 (self-test aborted by the application client) code to appear in the self-test results values
log. All other abort mechanisms will be reported as a 02 (self-test routine was interrupted by a reset condition).

Cheetah 15K.3 FC Product Manual, Rev. D 19

5.2.10 Product warranty

Beginning on the date of shipment to the customer and continuing for the period specified in your purchase
contract, Seagate warrants that each product (including components and subassemblies) that fails to function
properly under normal use due to defect in materials or workmanship or due to nonconformance to the applica­ble specifications will be repaired or replaced, at Seagate’s option and at no charge to the customer, if returned
by customer at customer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty pro­cedure. Seagate will pay for transporting the repair or replacement item to the customer. For more detailed
warranty information, refer to the standard terms and conditions of purchase for Seagate products on your pur­chase documentation.

The remaining warranty for a particular drive can be determined by calling Seagate Customer Service at
1-800-468-3472. You can also determine remaining warranty using the Seagate web site (www.seagate.com).
The drive serial number is required to determine remaining warranty information.

Shipping

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

Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in tran­sit. Contact your authorized Seagate distributor to purchase additional boxes. Seagate recommends shipping
by an air-ride carrier experienced in handling computer equipment.

Product repair and return information

Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate does
not sanction any third-party repair facilities. Any unauthorized repair or tampering with the factory seal voids
the warranty.

20 Cheetah 15K.3 FC Product Manual, Rev. D

Cheetah 15K.3 FC Product Manual, Rev. D 21

6.0 Physical/electrical specifications

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

6.1 AC power requirements

None.

6.2 DC power requirements

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

Table 2: DC power requirements for operation at 1Gb mode

ST373453FC ST336753FC ST336753FC

Notes

Voltage +5V +12V [2] +5V +12V [2] +5V +12V [2]

Regulation [5] ±5% ±5% [2] ±5% ±5% [2] ±5% ±5% [2]

Avg idle current DCX

Maximum starting current

(peak DC) DC 3σ [3] 1.14 1.88 1.04 1.54 1.03 1.43

(peak AC) AC 3σ [3] 1.44 2.82 1.44 2.62 1.36 2.38

Delayed motor start (max) DC 3σ [1] [4] 0.73 0.04 0.73 0.04 0.73 0.04

Peak operating current:

Typical DCX

Maximum DC 3σ [1] 1.07 1.19 1.03 1.03 1.03 0.90

Maximum (peak) DC 3s 1.77 2.40 1.70 2.28 1.70 2.04

[1] [7] 0.95 0.66 0.93 0.53 0.93 0.41

[1] [6] 1.05 1.15 1.02 0.97 1.02 0.86

(Amps) (Amps) (Amps) (Amps) (Amps) (Amps)

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

ues. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.

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

14,904 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been
completed and that the drive is able to accept selection by the host initiator.

[3] See +12V current profile in Figure 2.

[4] This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start

Motor command.

[5] See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and

transient response.

[6] Operating condition is defined as random 8 block reads (ST373453 at 295, ST336753 at 306 and

ST318453 at 299) I/Os per second. Current and power specified at nominal voltages. Decreasing +5 volt
supply by 5% increases 5 volt current by 3.2%. Decreasing +12 volt supply by 5% increases 12 volt cur­rent by 2.1% (2% for ST336753 and ST318453 models).

[7] During idle, the drive heads are relocated every 60 seconds to a random location within the band from

three-quarters to maximum track.

General DC power requirement notes.

1. Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current
shown.

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

3. Where power is provided to multiple drives from a common supply, careful consideration for individual drive
power requirements should be noted. Where multiple units are powered on simultaneously, the peak start­ing current must be available to each device.

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

5. No terminator power.

22 Cheetah 15K.3 FC Product Manual, Rev. D

6.2.1 Conducted noise immunity

Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz.
Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power
connector.

+5V +12V

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

6.2.2 Power sequencing

The drive does not require power sequencing. The drive protects against inadvertent writing during power-up
and down.

6.2.3 Current profiles

The +12V and +5V current profiles for the ST373453FC, ST336753FC, and ST318453FC models are shown
below in the following figures.

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 2 for maximum current requirements.

Figure 2. Typical ST373453FC drive +12V current profile

Cheetah 15K.3 FC Product Manual, Rev. D 23

Figure 3. Typical ST373453FC drive +5V current profile

Figure 4. Typical ST336753FC drive +12V current profile

24 Cheetah 15K.3 FC Product Manual, Rev. D

Figure 5. Typical ST336753FC drive +5V current profile

Figure 6. Typical ST318453FC drive +12V current profile

Cheetah 15K.3 FC Product Manual, Rev. D 25

Figure 7. Typical ST318453FC drive +5V current profile

26 Cheetah 15K.3 FC Product Manual, Rev. D

6.3 Power dissipation

ST373453FC

Typical power dissipation under idle conditions in 2Gb operation is 12.7 watts (43.3 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure

8). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5
volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by

3.4123.

ST373 4 5 3 FC DC CURRENT/POW ER vs THROUGHPUT (1 Gb)

Random 8 Block Reads

1.800

1.600

1.400

1.200

1.000

Amperes

0.800

0.600

0.400

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0

18 . 0 0

16 . 0 0

14 . 0 0

12 . 0 0

10 . 0 0

8.00

6.00

4.00

5Volt A

12 V o l t A

Wat ts

Power (watts)

I/Os per Second

Figure 8. ST373453FC DC current and power vs. input/output operations per second

ST336753FC

Typical power dissipation under idle conditions in 2Gb operation is 11.0 watts (37.5 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure

8). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5
volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by

3.4123.

ST336753FC DC CURRENT/POWER vs THROUGHPUT (1Gb)

1.800

1.600

1.400

1.200

1.000

Amperes

0.800

0.600

0.400

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0

Random 8 Block Reads

18 . 0 0

16 . 0 0

14 . 0 0

12 . 0 0

10 . 0 0

8.00

6.00

4.00

I/Os per Second

Figure 9. ST336753FC DC current and power vs. input/output operations per second

5Vo lt A

12 V o l t A

Wat ts

Pow er ( watt s)

Cheetah 15K.3 FC Product Manual, Rev. D 27

ST318453FC

Typical power dissipation under idle conditions in 2Gb operation is 9.6 watts (32.8 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure

8). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5

volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by

3.4123.

ST318453FC DC CURRENT/POWER vs THROUGHPUT (1Gb)

1. 8 0 0

1. 6 0 0

Random 8 Block Reads

18 . 0 0

16 . 0 0

5Vo lt A

12 V o l t A

Wat ts

1. 4 0 0

1. 2 0 0

1. 0 0 0

Amperes

0.800

0.600

0.400

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0

I/Os per Second

14 . 0 0

12 . 0 0

10 . 0 0

8.00

6.00

4.00

Power (watts)

Figure 10. ST318453FC DC current and power vs. input/output operations per second

6.4 Environmental limits

Temperature and humidity values experienced by the drive must be such that condensation does not occur on
any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F
(14.8°C). Maximum wet bulb temperature is 82°F (28°C).

6.4.1 Temperature

a. Operating

With cooling designed to maintain the case temperatures, the drive meets all specifications over a 41°F to
131°F (5°C to 55°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C)
per hour. The enclosure for the drive should be designed such that these temperatures not exceeded. Air
flow may be needed to achieve these temperature values (see Section 8.4). Operation at case tempera­tures above these values may adversely affect the drives ability to meet specifications.

The MTBF specification for the drive is based on operating in an environment that ensures that the case
temperatures are not exceeded. Occasional excursions to drive ambient temperatures of 131°F (55°C) or
41°F (5°C) may occur without impact to specified MTBF. Air flow may be needed to achieve these tempera­tures. Continual or sustained operation at case temperatures above these values may degrade MTBF. The
maximum allowable continuous or sustained HDA case temperature for the rated MTBF is 122°F (50°C).

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

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

28 Cheetah 15K.3 FC Product Manual, Rev. D

b. Non-operating

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

HDA Temp.
Check Point

Figure 11. Locations of the HDA 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 20% per hour.

b. Non-operating

5% to 95% non-condensing relative humidity.

6.4.3 Effective altitude (sea level)

a. Operating

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

b. Non-operating

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

6.4.4 Shock and vibration

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

The limits of shock and vibration defined within this document are specified with the drive mounted by any of
the four methods shown in Figure 12, and in accordance with the restrictions of Section 8.5. Orientation of the
side nearest the LED may be up or down.

6.4.4.1 Shock

a. Operating—normal

The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not
exceeding 15 Gs at a maximum duration of 11 msec (half sinewave). The drive, as installed for normal oper­ation, shall operate error free while subjected to intermittent 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 installed for normal operation, does not incur physical damage while subjected to intermit­tent shock not exceeding 40 Gs at a maximum duration of 11 msec (half sinewave). Shock occurring at
abnormal levels may promote degraded operational performance during the abnormal shock period. Speci-

Cheetah 15K.3 FC Product Manual, Rev. D 29

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

c. Non-operating

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

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

The drive subjected to nonrepetitive shock not exceeding 250 Gs at a maximum duration of 2 msec (half
sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,
or Z axis.

The drive subjected to nonrepetitve shock not exceeding 100 Gs at a maximum duration of 0.5 msec (half
sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,
or Z axis.

d. Packaged

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

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 or multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for
general freight shipment shall withstand a drop test from 48 inches (1,070 mm) against a concrete floor or
equivalent.

30 Cheetah 15K.3 FC Product Manual, Rev. D

Z

Y

X

Figure 12. Recommended mounting

X

Z

Y

Cheetah 15K.3 FC Product Manual, Rev. D 31

6.4.4.2 Vibration

a. Operating—normal

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

5-500 Hz @ 0.5 G (zero to peak)

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 installed for normal operation shall not incur physical damage while subjected to periodic
vibration not exceeding:

15 minutes of duration at major resonant frequency

5-500 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 damage or degraded performance as a result of continuous vibration not
exceeding

5-22 Hz @ 0.040 inches (1.02 mm) displacement (zero to peak)

22-500 Hz @ 2.00 G (zero to peak)

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 3.5 bels typical when measured to ISO 7779 specification.

There will not be any discrete tones more than 10 dB above the masking noise on typical drives when mea­sured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the
masking noise on any drive.

6.4.7 Electromagnetic susceptibility

See Section 2.1.1.1.

32 Cheetah 15K.3 FC Product Manual, Rev. D

6.5 Mechanical specifications

The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions
of the front panel are shown in figure below. Refer to Figure 13 for detailed mounting configuration dimensions.
See Section 8.5, “Drive mounting.”

Height: 1.000 in 25.4 mm
Width: 4.000 in 101.6 mm
Depth: 5.75 in 146.05 mm
Weight: 1.85 pounds 0.842 kilograms

B

H

-Z-T//
S

[1]

A

-Z-

M

L

R

-Z-N

C

-X-

J

K

-Z-

Notes:

Mounting holes are 6-32 UNC 2B, three

[1]

on each side and four on the bottom.
Max screw penetration into side of drive
is 0.15 in. (3.81 mm). Max screw
tightening torque is 6.0 in-lb (3.32 nm)
with minimum full thread engagement of

0.12 in. (3.05 mm).

-X-U

P

F

[1]

E

Figure 13. Mounting configuration dimensions

D

-X-

Dimension Table

Inches

A

1.028

max

B

5.787

max

C

4.000

± .010

D

3.750

± .010

E

0.125

± .010

F

1.750

± .010

H

1.122

± .020

J

4.000

± .010

K

0.250

± .010

L

1.638

± .010

M

0.181

± .020

N

.015

max

P

1.625

± .020

R

1.469

± .020

S

0.276

± .040

T

.015

max

U

.015

max

Millimeters

26.10

147.00

101.60

95.25

3.18

44.45

28.50

101.60

6.35

41.60

4.60
.038

41.28

37.31

7.00

0.38

0.38

max
max
± .25
± .25
± .25
± .25
± .50
± .25
± .25
± .25
± .50
max
± .50
± .50
± 1.02
max
max

Cheetah 15K.3 FC Product Manual, Rev. D 33

7.0 Defect and error management

The drive, as delivered, complies with this product manual. The read error rates and specified storage capaci­ties 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 management and
FC-AL system error considerations (errors in communications between the initiator and the drive). Tools for use
in designing a defect/error management plan are briefly outlined in this section. References to other sections
are provided when necessary.

7.1 Drive internal defects/errors

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

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

Manual

7.2 Drive error recovery procedures

When an error occurs during drive operation, the drive, if programmed to do so, performs error recovery proce­dures to attempt to recover the data. The error recovery procedures used depend on the options previously set
in the Error Recovery Parameters mode page. Error recovery and defect management may involve using sev­eral SCSI commands described in the
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 the recovery level for a single LBA. The total amount of time spent in
error recovery for a command can be limited using the Recovery Time Limit bytes in the Error Recovery mode
page. The total amount of time spent in error recovery for a single LBA can be limited using the Read Retry
Count or Write Retry Count bytes in the Error Recovery mode page.

The drive firmware error recovery algorithms consists of 11 levels for read recoveries and five levels for write.
Each level may consist of multiple steps, where a step is defined as a recovery function involving a single re­read or re-write attempt. The maximum level used by the drive in LBA recovery is determined by the read and
write retry counts.

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

.

Fibre Channel Interface Manual

Fibre Channel Interface Manual

Fibre Channel Interface

. The drive implements selectable error

.

34 Cheetah 15K.3 FC Product Manual, Rev. D

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

Table 3: Read and write retry count maximum recovery times

Maximum recovery time per

1

Read retry count

0 51.97 0 24.0
1 59.97 1 36.0
2 203.9 2 40.0
3 219.9 3 76.0
4 243.9 4 151.9
5 275.9 5 (default) 179.9

6347.8

7355.8

8371.8

9407.8
10 444.4
11 (default) 980.1

LBA (cumulative, msec) Write retry count

Maximum recovery time per

1

LBA (cumulative, msec)

[1] Setting these retry counts to a value below the default setting could result in degradation of the unrecov-

ered error rate. For example, suppose the read/write recovery page has the RC bit = 0, the read retry
count set to 4, and the recovery time limit set to 450. A 4-block read command can take up to 244 msec
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 Condition sta­tus and an unrecoverable read error will be reported.

7.3 FC-AL system errors

Information on the reporting of operational errors or faults across the interface is given in the

Interface Manual

. The FCP Response returns information to the host about numerous kinds of errors or faults.

Fibre Channel

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.

Cheetah 15K.3 FC Product Manual, Rev. D 35

8.0 Installation

Cheetah 15K.3 FC disc drive installation is a plug-and-play process. There are no jumpers, switches, or termi­nators on the drive. Simply plug the drive into the host’s 40-pin Fibre Channel backpanel 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 24). If you set the AL_PA on
the backpanel to any value other than 0, the device plugged into the backpanel’s SCA connector inherits this
AL_PA. In the event you don’t successfully assign unique hard addresses (and therefore have duplicate selec­tion IDs assigned to two or more devices), the FC-AL generates a message indicating this condition. If you set
the AL_PA on the backpanel to a value of 0, the system issues a unique soft-assigned physical address auto­matically.

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

• Set all option selections in the connector prior to applying power to the drive. If you change options after
applying power to the drive, recycle the drive power to activate the new settings.

• It is not necessary to low-level format this drive. The drive is shipped from the factory low-level formatted in
512-byte logical blocks. You need to reformat the drive only if you want to select a different logical block size.

8.1 Drive ID/option selection

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

8.2 LED connections

A connector, J6, is provided on the printed circuit board assembly (PCBA) to provide port bypass, drive active,
and drive fault LED connections (see Figure 15). See Sections 9.5.7, 9.5.8, and 9.5.9 for descriptions of LED
functions.

J6

Figure 14. Physical interface

36 Cheetah 15K.3 FC Product Manual, Rev. D

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

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

minus side of the resistor/LED combination is connected to this pin. Connect the plus side
to +5V.

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

Figure 15. LED indicator connector

8.2.1 J6 connector requirements

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

8.3 Drive orientation

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

8.4 Cooling

Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding
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 electronics 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 specified in Section 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
created while providing air flow to the electronics and HDA. Also, the shortest possible path between the air

Cheetah 15K.3 FC Product Manual, Rev. D 37

inlet and exit should be chosen to minimize the travel length of air heated by the drive and other heat sources
within the rack, cabinet, or drawer environment.

If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 16. The air-flow pat­terns are created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction,
convection, or other forced air-flow patterns are acceptable as long as the temperature measurement guide­lines of Section 6.4.1 are met.

Above unit

Under unit

Above unit

Under unit

Figure 16. 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:

where K is the mounting surface stiffness (units in lb/in or N/mm) and X is the out-of-plane surface distortion
(units in inches or millimeters). The out-of-plane distortion (X) is determined by defining a plane with three of
the four mounting points fixed and evaluating the out-of-plane deflection of the fourth 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 specifications given herein while mounted in
such an adapter frame. Adapter frames that are available may not have a mechanical structure capa­ble of mounting the drive so that it can meet the shock and vibration specifications listed in this manual.

8.6 Grounding

Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the
user. The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electri­cally isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCBA

K x X = F < 15lb = 67N

38 Cheetah 15K.3 FC Product Manual, Rev. D

ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of mount­ing the drive in the host equipment.

Increased radiated emissions 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.

Cheetah 15K.3 FC Product Manual, Rev. D 39

9.0 Interface requirements

This section partially describes the interface requirements as implemented on Cheetah 15K.3 FC drives. Addi­tional information is provided in the

9.1 FC-AL features

This section lists the Fibre Channel-specific features supported by Cheetah 15K.3 FC drives.

9.1.1 Fibre Channel link service frames

Table 4 lists the link services supported by Cheetah 15K.3 FC drives.

Table 4: Link services supported

Type of frame Link service

Basic link service frames Abort Sequence (ABTS)

Basic link service reply frames Basic_Accept (BA_ACC)

Extended link service frames N_Port Login (PLOGI)

Extended link service reply frames Accept (ACC)

Fibre Channel Services Register FC-4 Types (RFT_ID)

Fibre Channel Interface Manual

Basic_Reject (BA_RJT)

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

Link Service Reject (LS_RJT)

(part number 77767496).

9.1.2 Fibre Channel task management functions

Table 5 lists the Fibre Channel SCSI Fibre Channel Protocol (FC SCSI FCP) task management functions sup­ported.

Table 5: Fibre Channel SCSI FCP task management functions

Task name Supported

Ter mi n a t e t a s k N o

Clear ACA Yes

Target reset Yes

Clear task set Yes

Abort task set Yes

9.1.3 Fibre Channel task management responses

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

Table 6: FC SCSI FCP response codes

Function name Response code

Function complete 00

Function not supported 04

Function reject 05

40 Cheetah 15K.3 FC Product Manual, Rev. D

9.1.4 Fibre Channel port login

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

Table 7: N_Port login (PLOGI) payload

Bytes

0-15 03 00 00 00 09 09 BB BB CF XX FS FS XX XX XX XX Common

16-31 XXXXXXXXPNPNPNPNPNPNPNPNNNNNNNNN

32-35 NN NN NN NN

36-47 XXXXXXXXXXXXXXXXXXXXXXXXClass 1

48-51 XX XX XX XX

52-63 XXXXXXXXXXXXXXXXXXXXXXXXClass 2

64-67 XX XX XX XX

68-79 SOSOIC IC 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 Versi on

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 version level x

N_Port/F_Port Must = 0, N_Port

Alternate credit model Must = 1

Other bits reserved xxx XX

FS Receive buffer field size. The FS field in the common and Class 3 parameters is checked for the range 128 < FS < 2,112 and a

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

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

Cheetah 15K.3 FC Product Manual, Rev. D 41

9.1.5 Fibre Channel port login accept

Table 8 identifies the N_Port Login access payload values.

Table 8: N_Port Login Accept (ACC) payload

Bytes

0-15 02 00 00 00 09 09 00 00 88 00 FS FS 00 FF 00 01 Common

16-31 000001F42P0000CCCCUI UI UI 200000CC

32-35 CC 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 Ver sion

CC Bytes (23 and 24) and (31 and 32) are currently factory set to 04 CF respectively (subject to change).

FS Receive buffer field size. The drive returns and uses the receive buffer size from the N_Port Login Class 3 receive

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.

P Byte port identifier field.

0 P_LOGI received on Node.

1 P_LOGI received on Port A.

2 P_LOGI received on Port B.

9.1.6 Fibre Channel Process Login

Table 9 lists the process login payload data.

Table 9: Process Login (PLRI) payload

Bytes

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

16-19 00000022

XX Indicates fields that are not used.

9.1.7 Fibre Channel Process Login Accept

Table 10 lists Cheetah 15K.3 FC process login accept payload data.

Table 10: 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

42 Cheetah 15K.3 FC Product Manual, Rev. D

9.1.8 Fibre Channel fabric login

Table 11 lists the fabric login payload from the drive.

Table 11: Fabric Login (FLOGI) payload

Bytes

0-15 04 00 00 00 09 09 00 00 08 00 08 40 00 00 00 00 Common

16-31 000002F42P0000CCCCUIUI UI020000CC

32-35 CC 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 Versi on

CC Bytes (23 and 24) and (31 and 32) are currently factory set to 04 CF respectively (subject to change).

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.

P Port identifier field.

1 FLOGI originated on Port A.

2 FLOGI originated on Port B.

Cheetah 15K.3 FC Product Manual, Rev. D 43

9.1.9 Fibre Channel fabric accept login

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

Table 12: Fabric Login Accept (ACC) payload

Bytes

0-15 02 00 00 00 09 09 BB BB CF XX FS FS R_ A_ T0 V_ Common

16-31 E_ D_T0 V_ 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 XXXXXXXXXXXXXXXXXXXXXXXXVendor -

112-115 XX XX XX XX Ver sion

X Indicates a four-bit (hex) field is not checked.

x Indicates a single bit is not checked.

BB BB-Credit. This field is not checked. The FC-AL drive uses BB-Credit of zero (0).

CF Common features. This binary field selects the common features requested by the fabric login.

MSB Continuously increasing offset x

Random relative offset x

Valid version level x

N_Port/F_Port Must = 1, F_Port

Alternate credit model Must = 1

Other bits reserved xxx XX

FS Receive buffer field size. The FS field in the common and Class 3 parameters is checked for the range 128 < FS < 2,112 and a

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

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

44 Cheetah 15K.3 FC Product Manual, Rev. D

9.1.10 Fibre Channel Arbitrated Loop options

Table 13 lists the FC-AL options supported by Cheetah 15K.3 FC drives.

Table 13: FC-AL options supported

Option Supported

OPEN Half Duplex Accepted from another device.

OPEN Full Duplex Sent to open another device.

Accepted from another device.

Private Loop Yes

Public Loop Yes

Old Port State No

Loop Position Yes

Loop Position Report Yes

9.2 Dual port support

Cheetah 15K.3 FC drives have two independent FC-AL ports. These ports may be connected on independent
loops or on the same loop. Port A and Port B may be connected in any order or combination.

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

• If both ports are connected in the same loop and hard addressing is used, at least one port will attempt tak­ing a soft address to prevent an address conflict.

Note. When a Cheetah 15K.3 FC drive is connected in loops with previous Seagate FC drive products:

Barracuda 4LP FC (ST32171FC, ST34371FC, and ST34571FC)
Barracuda 9FC (ST19171FC)
Cheetah 4LP FC (ST34501FC)
Cheetah 9FC (ST19101FC)

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

Subject to buffer availability, the Cheetah 15K.3 FC drives support:

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

• Full duplex—The drive supports sending FCP_Data, FCP_RSP, FCP_XFR_RDY and ELS transfers while
receiving frames on both ports.

Cheetah 15K.3 FC Product Manual, Rev. D 45

9.3 SCSI commands supported

Table 14 lists the SCSI commands supported by Cheetah 15K.3 FC drives.

Table 14: Supported commands

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 reservation

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 recovery page (07h)

Y Caching parameters page (08h)

Y Control mode page (0Ah)

Y Fibre Channel Interface Control page (19h)

Y Power control page (1Ah)

Y Information exceptions control page (1Ch)

1Bh Y Start unit/stop unit

1Ch Y Receive diagnostic results

Y Supported diagnostics pages

46 Cheetah 15K.3 FC Product Manual, Rev. D

Table 14: Supported commands

Command code Supported [4] Command name

1Dh Y Send diagnostics page

25h Y Read capacity

28h Y Read extended

2Ah Y Write extended

2Bh Y Seek extended

2Eh Y Write and verify

2Fh Y Verify

30h N Search data high

31h N Search data equal

32h N Search data low

33h N Set limits

34h N Prefetch

35h Y Synchronize cache

36h N Lock-unlock-cache

37h Y Read defect data

39h N Compare

3Ah N Copy and verify

3Bh Y Write buffer

3Ch Y Read buffer

(continued)

Y Translate page

Y Enclosure services page

Y Supported diagnostics pages

Y Translate page

Y Disable page out

Y Force unit access

N Relative address

Y Disable page out

Y Force unit access

N Relative address

Y Disable page out

Y Byte check

N Relative address

Y Disable page out

Y Byte check

N Relative address

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]

Y Read combined header and data mode (0)

Y Read data mode (2)

Cheetah 15K.3 FC Product Manual, Rev. D 47

Table 14: Supported commands

Command code Supported [4] Command name

3Eh Y Read long

3Fh Y Write long

40h N Change definition

41h Y Write same

42-4Bh N Not used

4Ch Y Log Select

4Dh Y Log Sense

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)

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 reserve 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

(continued)

Y Read descriptor mode (3)

N PBdata

NLBdata

Y Support 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)

Y 3rd party reserve

N Extent reservation

48 Cheetah 15K.3 FC Product Manual, Rev. D

[1] Cheetah 15K.3 FC drives can format to any multiple of four bytes per logical block in the range 512 to 704

bytes.

[2] Warning. Power loss during flash programming can result in firmware corruption. This usually makes the

drive inoperable.

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

[4] Y = Yes. Command is supported.

N = No. Command is not supported.
A = Support is available on special request.

Cheetah 15K.3 FC Product Manual, Rev. D 49

9.3.1 Inquiry data

Table 15 lists the Inquiry command data that the drive should return to the initiator per the format given in the

Fibre Channel Interface Manual

Table 15: Cheetah 15K.3 FC inquiry data

Bytes Data (hex)

0-15 00 00 03** 12 8B 00 PP 0A 53 45 41 47 41 54 45 20 Vendor ID

16-31 [5354333733343533464320]

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* 32* 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 = SCSI-3 implemented.

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 18 through 26 reflect model of drive. The table above shows the hex values for Model ST373453FC.

Refer to the values below for the values of bytes 18 through 26 of you particular model:

ST336753FC 53 54 33 33 36 37 35 33 46 43

ST318453FC 53 54 33 31 38 34 35 33 46 43

.

1

20 20 20 20 20 Product ID

9.3.2 Mode Sense data

The Mode Sense command provides a way for the drive to report its operating parameters to the initiator. The
drive maintains four sets of mode parameters:

1. Default values

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

2. Saved values

Saved values are stored on the drive’s media using a Mode Select command. Only parameter values that
are allowed to be changed can be changed by this method. Parameters in the saved values list that are not
changeable by the Mode Select command get their values from default 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 requiring unique saved values, the required unique saved values are stored into the saved val­ues storage location on the media prior to shipping the drive. Some drives may have unique firmware with
unique default values also.

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

50 Cheetah 15K.3 FC Product Manual, Rev. D

3. Current values

Current values are volatile values being used by the drive to control its operation. A Mode Select command
can be used to change the values identified as changeable values. Originally, current values are installed
from saved or default values after a power on reset, hard reset, or Bus Device Reset message.

4. Changeable values

Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the current values
and saved values can be changed by a Mode Select command. A one (1) indicates the value can be
changed. A zero (0) indicates the value is not changeable. For example, in Table 16, refer to Mode page
81, in the row entitled “CHG.” These are hex numbers representing the changeable values for Mode page

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

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

Note. Because there are often several different versions of drive control firmware in the total population of

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

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

Fibre Channel Interface Manual

).

Definitions:

DEF = Default value. Standard OEM drives are shipped configured this way.

CHG = Changeable bits; indicates if default value is changeable.

Cheetah 15K.3 FC Product Manual, Rev. D 51

Table 16: Mode Sense data default and changeable values for ST373453FC drives

ST373453FC

Bytes

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

10 Byte
Mode

00 ae 00 10 00 00 00 08 08 8b b9 98

00 00 02

00
Sense
Header

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

DEF

81 0a c0 0b ff 00 00 00 05 00 ff ff

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

DEF 82 0e 80 80 00 00 00 00 00 00 01 f5 00 00 00 00

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

DEF 83 16 48 a8 00 00 00 28 00 00 02 3b 02 00 00 01 00 78 00 60 40 00 00 00

CHG

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

DEF 84 16 00 7a 4e 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

CHG

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

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

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

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 1c 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 05 00

CHG 8a 0a 03 f1 08 00 00 00 00 00 00 00

DEF 99 06 00 00 00 00 00 00

CHG 99 06 00 ff 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 0f 00 00 00

CHG 80 06 b7 40 0f 00 00 00

<--- Read capacity data --->

08 8b b9 97 00 00 02 00

52 Cheetah 15K.3 FC Product Manual, Rev. D

Table 17: Mode Sense data default and changeable values for ST336753FC drives

ST336753FC

Bytes

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

10 Byte
Mode

00 ae 00 10 00 00 00 00 08 04 45 dc cc 00 00 02 00
Sense
Header

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

DEF

81 0a c0 0b ff 00 00 00 05 00 ff ff

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

DEF 82 0e 80 80 00 00 00 00 00 00 01 f5 00 00 00 00

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

DEF 83 16 24 54 00 00 00 14 00 00 02 3d 02 00 00 01 00 88 00 60 40 00 00 00

CHG

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

DEF 84 16 00 7a 4e 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

CHG

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

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

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

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 1c 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 02 a0

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 0f 00 00 00

CHG 80 06 b7 40 0f 00 00 00

<--- Read capacity data --->

04 45 dc cb 00 00 02 00

Cheetah 15K.3 FC Product Manual, Rev. D 53

Table 18: Mode Sense data default and changeable values for ST318453FC drives

ST318453FC

Bytes

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

10 Byte
Mode

00 ae 00 10 00 00 00 00 08 02 22 ee 66 00 00 02 00
Sense
Header

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

DEF

81 0a c0 0b ff 00 00 00 05 00 ff ff

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

DEF 82 0e 80 80 00 00 00 00 00 00 01 f5 00 00 00 00

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

DEF 83 16 12 2a 00 00 00 0a 00 00 02 3d 02 00 00 01 00 78 00 60 40 00 00 00

CHG

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

DEF 84 16 00 7a 4e 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

CHG

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

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

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

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 1c 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 01 60

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 0f 00 00 00

CHG 80 06 b7 40 0f 00 00 00

<--- Read capacity data --->

02 22 ee 65 00 00 02 00

54 Cheetah 15K.3 FC Product Manual, Rev. D

9.4 Miscellaneous operating features and conditions

Table 19 lists various features and conditions. A “Y” in the support column indicates the feature or condition is
supported. An “N” in the support column indicates the feature or condition is not supported.

Table 19: Miscellaneous features

Supported Feature or condition

Y FC-AL selective reset

Y Automatic contingent allegiance

N Asynchronous event notification

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

Table 20: Miscellaneous status

Supported Status

Y Good

Y Check condition

Y Condition met/good

YBusy

Y Intermediate/good

Y Intermediate/condition met/good

Y Reservation conflict

Y Task set full

YACA active

Y ACA active, faulted initiator

Cheetah 15K.3 FC Product Manual, Rev. D 55

9.5 FC-AL physical interface

Figure 17 shows the location of the J1 Fibre Channel single connection attachment (FC-SCA) and the J6 con­nector. Figure 19 provides the dimensions of the FC-SCA. Figure 20 provides the dimensions of the J6 con­nector.

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

Figure 17. Physical interface

Fibre Channel Interface Manual

J6

..

9.5.1 Physical characteristics

This section defines physical interface connector.

9.5.1.1 Physical description

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

Port bypass circuits (PBCs) allow devices to be inserted into unpopulated locations or removed from the loop
with loop operation recovery after a brief interruption. These PBCs are located external to the FC-AL device.
Figure 18 shows the relationship between the PBC and FC-AL device.

Port Bypass

Circuit

From Previous

Port Bypass

Circuit N–1

Drive

MUX

To Next

Drive

Port Bypass

Circuit N+1

Drive N–1

Figure 18. Port bypass circuit physical interconnect

Select

SerialInSerial

Out

Drive N

Drive N+1

56 Cheetah 15K.3 FC Product Manual, Rev. D

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 19. The J6 connector is illustrated in Figure 20.

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 19. FC-AL SCA device connector dimensions

.079 (2 mm)

.079

(2 mm)

(17.983 mm)

Figure 20. 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

Cheetah 15K.3 FC Product Manual, Rev. D 57

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 21: FC-SCA pin descriptions

Pin Signal name Signal type Pin Signal name Signal type

1* -EN bypass port A Low Voltage TTL output 21 12 Volts charge

2* 12 Volts 22 Ground

3* 12 Volts 23 Ground

4* 12 Volts 24* +Port A_in Diff. PECL input pair

5* -Parallel ESI 25* -Port A_in

[2]

[2]

[1]

TTL input 29 Ground

TTL input 30* +Port A_out Diff PECL output pair

[2]

TTL input 37 SEL_1 TTL input/output

[2]

TTL input 38 SEL_0 TTL input/output

26 Ground

[2]

TTL input

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

10* Start_2

11* -EN bypass port B Low Voltage TTL output 31* -Port A_out

12* SEL_6 TTL input/output 32 Ground

13* SEL_5 TTL input/output 33* +Port B_out Diff PECL output pair

14* SEL_4 TTL input 34* -Port B_out

15* SEL_3 TTL input/output 35 Ground

16* Fault LED out Open collector out 36 SEL_2 TTL input/output

17* DEV_CTRL_CODE_2

18* DEV_CTRL_CODE_1

19* 5 Volts 39 DEV_CTRL_CODE_0

20* 5 Volts 40 5 Volts charge

*Short pins in mating backpanel connector.

[1] This pin may be connected to external logic to detect the presence of the drive. The drive connects this

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 connection at the backplane is either open or grounded (open for the ‘1’ setting, grounded 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.

58 Cheetah 15K.3 FC Product Manual, Rev. D

9.5.5 FC-AL transmitters and receivers

A typical FC-AL differential copper transmitter and receiver pair is shown in Figure 21. The receiver is required
to provide the AC coupling to eliminate ground shift noise.

68

TX

Transmitter

TY

150

Figure 21. FC-AL transmitters and receivers

150

68

Differential

Transfer Medium

.01

150

.01

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 pins. The supply current and return current must be distributed as evenly as possible
among the pins. The maximum current typically occurs while the drive motor is starting.

Three 5 volt pins provide logic power to the drive. The current return for the +5 volt power supply is through the
common ground pins. Distribute supply and return current as evenly as possible 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 longer voltage contacts in the connector to enable the drive filter capacitors to charge.
Current to the drive through the long charge pins is limited by the system in which the drive operates. Three of
the +12 volt pins are shorter to allow capacitive pre-charging through the longer +12 volt charge pin. Two of the
+5 volt pins are shorter to allow capacitive precharging through the longer +5 volt charge pin.

9.5.7 Fault LED Out

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

• the drive detects failure of both ports

• the drive detects an internal failure

• the drive receives the appropriate fault LED command from the host

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

9.5.8 Active LED Out

The Active LED Out signal is driven by the drive as indicated in Table 22.

Table 22: 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

Cheetah 15K.3 FC Product Manual, Rev. D 59

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

9.5.9 Enable port bypass signals

The – Enable Bypass Port A (– EN BYP Port A) and – Enable Bypass Port B (– EN BYP Port B) signals control
the port bypass circuits (PBC) located external to the disc drive. The PBC allows a loop to remain functional in
the event of a drive failure or removal. When these signals are active, low, the PBC bypasses the drive on the
associated port. When an Enable Bypass signal is active, the corresponding Port Bypass LED signal in con­nector J1 is driven low by the disc drive. A pull down resistor, 1K, located with the PBC should be used to
insure the bypass is enabled if the disc drive is not installed.

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

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

• Transmitter/receiver wrap test failure

• Loss of receive clock

• Loss of transmission clock

• Drive interface hardware error

9.5.10 Motor start controls

The drive’s motor is started according to the Start_1 and Start_2 signals described in Table 23. The state of
these signals can be wired into the backplane socket or driven by logic on the backplane.

Table 23: 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 times the modulo 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 determine drive address, and, optionally, for an Enclosure Services Inter­face. When the Parallel ESI line is high, the enclosure backpanel must provide address information on the SEL
line. Refer to table 24 for a mapping of SEL to FC-AL physical addresses (AL_PA). You can think of the SEL
lines as the equivalent of a backpanel logic plug. The drives does not provide pull up resistors on these lines.
The backpanel is required to provide high and low inputs to the SEL_ID lines per the specifications in table 26
on page 62.

Note. Table 24 gives AL_PA values for each SEL value. The first entry 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 being assigned using the SEL lines and that a “soft” address will be determined by
FC-AL loop initialization.

When the Parallel ESI line is low, the enclosure backpanel logic switches to ESI mode if supported. There are
two modes of ESI, seven bits of enclosure status and a bidirectional mode. ESI support and the mode are
determined by the drive using a discovery process. Refer to the
tion of ESI operation.

Fibre Channel Interface Manual

for a descrip-

60 Cheetah 15K.3 FC Product Manual, Rev. D

9.5.11.1 Parallel Enclosure Services Interface (ESI)

The parallel ESI line is an output from the drive. This line provides the enclosure with an indication of the
present function of the SEL lines. A high level, the default state, indicates the drive requires address informa­tion on the SEL lines. A low level indicates the drive is attempting an ESI transfer. The enclosure may not sup­port ESI on any or all drive locations. It may only support the address function. Support of ESI is discovered by
the drive. Refer to the

Fibre Channel Interface Manual

for a description of ESI operations.

Cheetah 15K.3 FC Product Manual, Rev. D 61

Table 24: Arbitrated loop physical address (AL_PA) values

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

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

62 Cheetah 15K.3 FC Product Manual, Rev. D

9.5.12 Device control codes

The drive inputs a Device Control Code on the DEV_CTRL_CODE lines at power up to determine the link rate
on the Fibre Channel ports. Both ports run at the same rate. If the backpanel does not connect to these lines,
the drive has 10K ohm pull up resistors that default the device control code to 7 (1.0625 GHz). Table lists the
supported codes.

Table 25: 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 describes the electrical signal characteristics of the drive’s input and output signals. See Table 21
on page 57 for signal type and signal name information.

9.6.1 TTL input characteristics

Table 26 provides the TTL characteristics.

Table 26: TTL characteristics

State Voltage Current

Input high 1.9 < V

Input low -0.5V < V

Output high (-EN Bypass A, B) 2.4 < V

Output low (-EN Bypass A, B) V

Output high (-Parallel ESI) 2.4 < V

VOH > 0.9V

Output low (-Parallel ESI) 0 < V

Output high (all other outputs) 2.4 < V

VOH > 0.9V

Output low (all 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 27 for the output characteristics of the LED drive signals.

Table 27: 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

Cheetah 15K.3 FC Product Manual, Rev. D 63

9.6.3 Differential PECL output

The serial PECL output signal voltage characteristics are provided in Table 28. The outputs are not AC coupled
in order to deliver maximum signal without rise and fall time degradation. You must AC couple the receiver to
isolate potentially different DC characteristics of the outputs and the receiver.

Table 28: Differential PECL output characteristics

Description Parameter Notes

Serial output voltage swing 600 < V

< 1300 mV Centered at 1.32V

out

Figure 22 provides the data output valid eye diagram relative to the bit cell time.

941 ps

Vout (mv)

800 ps

Figure 22. Transmit eye diagram

9.6.4 Differential PECL input

The serial PECL input signal voltage characteristics are provided in Table 29.

Table 29: Differential PECL input characteristics

Description Parameter Notes

Serial input voltage swing 200 < V

< 1.300 mV AC coupled

in

Figure 23 provides the data valid eye diagram for typical and minimum requirements to recover data at the
specified interface error rate. The inputs are AC coupled on the drive.

941 ps

Vin (mv)

659 ps

376 ps

Figure 23. Receive eye diagram

Typical

Minimum

64 Cheetah 15K.3 FC Product Manual, Rev. D

Cheetah 15K.3 FC Product Manual, Rev. D 65

10.0 Seagate Technology support services

Online Services

Internet

www.seagate.com for information about Seagate products and services. rss.seagate.com for information

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gate.com/support/email/email_tape_presales.html or [e-mail]

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66 Cheetah 15K.3 FC Product Manual, Rev. D

Presales, Technical Support and Customer Service

Presales Support

Our Presales Support staff can help you determine which Seagate products are best suited for your specific
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Technical Support

If you need help installing your drive, consult your system's documentation or contact the dealer's support ser­vices department for assistance specific to your system. Seagate technical support is also available to assist
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configuration information and your drive’s “ST” model number available.

gate.com or through one of our technical support service centers. Have your system

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Cheetah 15K.3 FC Product Manual, Rev. D 67

European Support Services

For European presales, technical support, and warranty service, dial the toll-free number for your specific
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68 Cheetah 15K.3 FC Product Manual, Rev. D

Cheetah 15K.3 FC Product Manual, Rev. D 69

6

Index

Numerics

12 volt

pins

58

3rd party reserve command
5 volt pins

58

A

Abort Sequence (ABTS) 39
abort task set function
AC coupling
AC power requirements
ACA active status
ACA active, faulted initiator status
Accept (ACC)
acoustics
active LED Out signal
Actual retry count bytes command
actuator

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

illustrated
air inlet
Alternate credit model
altitude
ambient
ambient temperature
ANSI documents

fibre channel

SCSI
arbitrated loop physical address (AL_PA)
arbitration
asynchronous event notification
audible noise
auto negotiation of link rate
auto write and read reallocation

programmable
automatic contingent allegiance
average idle current
average rotational latency

58

54

39

31

7

54

55

31

27, 36, 37

37

36

28

28

27, 36

4

4

35

3

6

21

B

backpanel 57
backplane
basic link service frames
Basic_Accept (BA_ACC)
Basic_Reject (BA_RJT)
BB

40, 43

BB-Credit
buffer

59

40, 43

47

39

21

54

58

45

5

39

40, 43

54

62

54

9

39

39

39

35

data
space

11

busy status
bypass circuit
Byte check command
bytes per surface
bytes per track

54

15

46

9

9

C

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

formatted

unformatted
case temperature
CC

41, 42

CF

40, 43

Change definition command
character sync
charge pins
check condition status
Class 3 parameters
class B limit
Class valid
clear ACA function
clear task set function
commands supported
Common features
Company ID
Compare command
Concurrent sequences
condensation
condition met/good status
connector

illustrated

requirements
continuous vibration
Continuously increasing offset
control code values
Control mode page (0Ah) command
cooling
Copy and verify command
Copy command
CRC

CS
Current profiles
customer service

15

error

40

36

13

11

11

7

7, 9

27

47

15

58

54

40, 43

3

40, 43

39

39

45

40, 43

41, 42

46

40

28

54

56

56

31

40, 43

62

45

46

45

22

19

D

data block size

modifing the
data buffer to/from disc media
data heads

7

10

45

3

70 Cheetah 15K.3 FC Product Manual, Rev. D

read/write 9

data rate

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

requirements
defect and error management
deferred error handling
description
DEV_CTRL_CODE
Device Behavior page command
device control code values
Device Identification page command
device selection IDs
devices
differential PECL input
dimensions
Disable page out command
disc rotation speed
Disconnect/reconnect control (page 02h) command

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

Download microcode with offsets mode (6)
drive
drive active LED connection
drive characteristics
drive fault LED connection
drive ID
drive ID/option select headers
drive mounting
drive orientation
drive select
driver signals
drivers and receivers
dual port support

9

10

63

45

57

21

33

54

5

62

45

62

45

35

35

63

32

46

9

45

46

46

46

46

31

35

9

35

35

35

32, 37

36

57

62

6

44

E

electrical

description of connector

signal characteristics

specifications
electromagnetic compatibility
electromagnetic interference (EMI)
electromagnetic susceptibility
EMI

13

EMI requirements
enable bypass

port A

59

port B

59

signal

59

state

15

Enclosure Services interface

21

3

57

62

3

13

31

57

Enclosure services page command
environment
environmental

interference
limits

requirements
environmental control
error

detection mechanisms, FC

management

rates
error correction code

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

frames

reply frames
Extended sense command
Extent reservation command

37

13

27

13

31

33

13

6

39

39

45

47

F

fabric 43
Fabric Address Notification (FAN)
Fabric Login (FLOGI)
FAN

43

fault LED out signal
FC-AL

document

interface

options supported

physical interface

SCA device connector, illustrated

selective reset
FCC rules and regulations
FCP

for SCSI, document

response codes

task management functions
FC-PH document
features

interface
Fibre Channel documents
Fibre Channel Interface Control page (19h)
Fibre Channel Interface Manual
Fibre Channel Services
Field pointer bytes command
firmware

corruption
Firmware download option command
Firmware numbers page command
flawed sector reallocation
FLOGI

received on Port A

received on Port B
Force unit access command
form factor
format

35

4

35, 57

6

39

6

48

6

39

58

44

55

54

3

4

39

4

4

39

45

6

42
42

46

46

14

45

39

56

39

45

1, 3, 4

46

45

Cheetah 15K.3 FC Product Manual, Rev. D 71

Format command execution time 9
Format page (03h) command
Format unit command
front panel
FS

40, 41, 43

function

32

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

45

39

45

39

39

G

Good status 54
gradient
ground shift noise
grounding

28

58

37

H

hard assigned arbitrated loop physical address

(AL_PA)

HDA

36, 37

head and disc assembly (HDA)
head and disc assembly.
heads

read/write data
heat removal
heat source
host equipment
hot plugging the drive
humidity
humidity limits

28

37

36

27

35

38

9

14

See

5

HDA

I

IC 40
ID and configuration options
Implemented operating def. page command
Information exceptions control page (1Ch) command

45
Initiator control
Inquiry command
inquiry data
installation

guide

interface

commands supported
description
error rate
errors
illustrated
physical
requirements

interleave

minimum
intermediate/condition met/good status
intermediate/good status
Intermix
internal data rate

40, 43

40

45

49

35

4

35

55

13

13

55

55

39

6

10

9

6

45

45

54

54

internal defects/errors
internal drive characteristics

33

J

J1 connector 35
J6 connector
Jumper settings page command
jumpers

35, 36

35

L

latency

average rotational
LBdata
LED driver signals
Link Service Reject (LS_RJT)
link services supported
Lock-unlock-cache command
Log select command
Log sense command
logic power
logical block address
logical block reallocation scheme
logical block size
logical segments
Logout (LOGO)
loop

loop position

loop position report

LS_RJT
LSI circuitry

M

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

miscellaneous status support

47

58

55, 59

disruption

initialization

FC-AL options

FC-AL options

14

40, 43

7

Adaptive caching

Asynchronous event notification

Automatic contingent allegiance

Deferred error handling

FC-AL selective reset

Parameter rounding

Queue tagging

Reporting actual retry count

Segmented caching

SMP = 1 in Mode Select command

Synchronized (locked) spindle operation

Zero latency read

9, 10

62

39

47
47

11

6, 10

11

39

35

44

44

21

6

54

54

54

9

45

39

46

6

21

14

10

54
54

54

54

54

54

54

54

54

72 Cheetah 15K.3 FC Product Manual, Rev. D

ACA active 54
ACA active, faulted initiator
Busy

54

Check condition
Condition met/good
Good

54

Intermediate/condition met/good
Intermediate/good
Reservation conflict

Task set full
miscorrected media data
Mode select

(10) command

command
Mode sense

(10) command

command

data, table
monitoring state
motor start

controls

option
mounting

holes

orientations
mounting configuration
mounting configuration dimensions
MTBF

defined

59

10

37

37

13, 14, 27

14

54

54

54

54

54

47

45

47

45

49, 51

15

36

32

54

13

N

N_Port Login (PLOGI) 39

payload

payload values
NN

40, 43

Node Name
Node name
noise

audible
noise immunity
non-operating

temperature
non-operating vibration

40

41

43

40

3

22

28, 29, 31

28

31

O

office environment 31
old port state

FC-AL options
OPEN Full Duplex

FC-AL options
OPEN half duplex

FC-AL options
Open sequences per exchange
operating
option configurations
option selection
options

28, 31

7, 44

44

44

44

40

35

57

54

32

orientation
OS

40

out-of-plane distortion

28

37

P

P_LOGI

received on Port A

received on Port B
package size
package test specification
packaged
parameter rounding
pass-through state
PBC

55, 59

PBdata

37

PCBA
peak bits per inch
peak operating current
peak-to-peak measurements
PECL input
performance characteristics

detailed

general
performance degradation
performance highlights
physical damage
physical interface

description
physical specifications
PI

41, 42

pin descriptions
PN

40, 43

port bypass circuit
port bypass LED connection
Port DISCovery
Port Discovery (PDISC)
port identifier field
port login

accept
Port Name
Port name (initiator’s)
power

58

dissipation

requirements, AC

requirements, DC

sequencing
Power control page (1Ah) command
power distribution
power failure warning
Prefetch command
prefetch/multi-segmented cache control
preventive maintenance
private loop

FC-AL options
Proc Assc
Process Accept (ACC)
Process Login (PRLI)

29

29

47

63

9

10

55

40

41
43

26

22

40

41
41

4

54

15

9

21

22

29

6

31

55

21

57

15, 55, 59

35

40

39

41, 42

40

21

21

45

3

62

46

13

44

41

39, 41

10

Cheetah 15K.3 FC Product Manual, Rev. D 73

Process Login Accept (ACC) payload 41
process login payload data
Process Logout (PRLO)
public loop

FC-AL options

pull down resistor

44

59

41

39

Q

queue tagging 54

R

radio interference regulations 3
Random relative offset
RCD bit
Read buffer command
Read capacity command
Read combined header and data mode (0)
Read command
Read data mode (2)
Read defect data command
Read descriptor mode (3)
read error rates
Read extended command
Read Link Status (RLS)
Read long command
read/write data heads
Reassign blocks command
Receive buffer field size
receive buffer field size
Receive diagnostic results command
receive eye

receivers
recommended mounting
recovered media data
reference

Regenerate command
Register FC-4 Types (RFT_ID)
Relative address command
relative humidity
Release command
Released (10) command
reliability

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

11

13

diagram

63

58

documents

4

7

and service
specifications

14

28

command

45

40, 43

46

46

45

46

46

47

46

39

47

9

45

40, 43

41

45

30

13

47

39

46

28

45

47

13

19

54
45
54

45

47

19

45

46

rotation speed
running disparity

9

15

S

safety 3
SCA part numbers
SCSI interface

commands supported

Search data

equal command
high command

low command
Seek command
seek error

defined

rate
Seek extended command
seek performance characteristics
seek time

average typical

full stroke typical

single track typical
segmented caching
SEL ID

lines

standard feature
Self-Monitoring Analysis and Reporting Technology

Send diagnostics page command
Sequential delivery
service

life

philosophy

tools
Service Options
Service options
Set limits command
shielding
shipping
shipping container
shock

and vibration
shock mount
signal

characteristics

LED driver
single-unit shipping pack kit
SMART
SMP = 1 in Mode Select command
SO

40, 43

spindle brake
Stacked connection req.
standards
Start unit/stop unit command
start/stop time
support services
Supported diagnostics pages command

13

13

35

59

7, 15

14

14

3

19

28, 29

7, 15

3

56

45

46

46

46

45

46

9

9

9

9

54

6

46

40, 43

14

43

40

46

28

28

37

62

62

7

54

6

40, 43

45

10

65

45, 46

74 Cheetah 15K.3 FC Product Manual, Rev. D

surface stiffness

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

system chassis

35

operation

54

37

37

46

T

target reset function 39
task management functions

Abort task set

Clear ACA

Clear task set

Target reset

terminate task
task management response codes

Function complete 00

Function not supported 05

Function reject 04
task set full status
technical support services
temperature

ambient

case

27

gradient

limits

27

non-operating

regulation

See also

terminate task function
terminators
Test unit ready command
Third-party Process Logout (TRPLO)
tracks per inch
tracks per surface
Translate page command
transmit eye diagram
transmitters
transporting the drive
TTL input characteristics

39

39

39

39

39

54

27, 36

27

27

28

3

cooling

35

9

9

58

39

39

39

39

39

65

39

45

46

63

19

62

39

vibration
Vital product data page command

28, 31

45

W

warranty 19
word sync
Write and verify command
Write buffer command
Write combined header and data mode (0)
Write command
Write data mode (2)
write errors
Write extended command
Write long command
Write same command

15

46

46

45

46

13

46

47

47

X

XD read 47
XD write
XD write extended command
XID reassign
XP write

47

47

40

47

Z

zero latency read 54
zone bit recording (ZBR)

6

46

U

UI 41, 42
unique identifier
Unit attention page (00h) command
Unit serial number page command
unrecoverable

error

13

write error, defined
unrecovered media data

41, 42

45

13

13

V

Valid version level 40, 43
Verify command
Verify error recovery page (07h) command

46

45

45

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

Publication Number: 100148129, Rev. D, Printed in USA