seagate CHEETAH 15K.4 FC product manual

Cheetah 15K.4 FC

ST3146854FC
ST373454FC
ST336754FC

Cheetah 15K.4 FC

ST3146854FC
ST373454FC
ST336754FC

©2004, 2005 Seagate Technology LLC All rights reserved

Publication number: 100220449, Rev. C

May 2005

Seagate, Seagate Technology, and the Seagate logo are registered trademar ks of Seagate
Technology LLC. SeaTools, SeaFONE, SeaBOARD, and SeaTDD are either registered
trademarks or tradema rks of Seaga te Technology LLC. Othe r product names are regist ered
trademarks or trademarks of their owners.

Seagate reserves the right to ch ange, witho ut notice, product offerings or spec ifications . No

part of this publication may be reproduc ed in any form w ithout wr itte n per mi ssio n of Seagate

Technology LLC.

Revision status summary sheet

Revision Date Sheets Affected

Rev. A 06/30/04 1/1, v-viii, 1-96. Initial release.
Rev. B 07/14/04 Page 9.
Rev. C 05/04/05 Pages 2,11, 25, 26, 36, 38, 50, 51, 57, and 75 - 79.

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.0 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Media description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.3 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.4 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.5 Formatted capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.5.1 Programmable drive capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.6 Factory-installed accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.7 Factory-installed options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.8 User-installed accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.0 Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1 Internal drive characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2 Seek performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2.1 Access time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2.2 Format command execution time (minutes) . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2.3 General performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.3 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.4 Prefetch/multi-segmented cache control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.5 Cache operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.5.1 Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.5.2 Prefetch operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.5.3 Optimizing cache performance for desktop and server applications . . . . . . . . . 15

5.0 Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1 Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1.1 Recoverable Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1.2 Unrecoverable Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1.3 Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.1.4 Interface errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2 Reliability and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2.1 Mean time between failure (MTBF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2.2 Preventive maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2.3 Hot plugging the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2.4 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2.5 Thermal monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.2.6 Drive Self Test (DST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.2.7 Product warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.0 Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1 AC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2 DC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2.1 Conducted noise immunity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.2.2 Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.2.3 Current profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.3 Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.4 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Cheetah 15K.4 FC Product Manual, Rev. C i

6.4.1 Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.4.6 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.4.7 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.4.8 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.5 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.1 Drive internal defects/errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.2 Drive error recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.3 FC-AL system errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.4 Background Media Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.4.1 Media Pre-Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

8.0 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.1 Drive ID/option selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.2 LED connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.2.1 J6 connector requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.3 Drive orientation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.4 Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.5 Drive mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

8.6 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

9.0 Interface requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.1 FC-AL features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.1.1 Fibre Channel link service frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.1.2 Fibre Channel task management functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.1.3 Fibre Channel task management responses . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.1.4 Fibre Channel port login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

9.1.5 Fibre Channel port login accept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

9.1.6 Fibre Channel Process Login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

9.1.7 Fibre Channel Process Login Accept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

9.1.8 Fibre Channel fabric login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

9.1.9 Fibre Channel fabric accept login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

9.1.10 Fibre Channel Arbitrated Loop options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

9.2 Dual port support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

9.3 SCSI commands supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

9.3.1 Inquiry data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9.3.2 Mode Sense data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9.4 Miscellaneous operating features and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

9.5 FC-AL physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

9.5.1 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

9.5.2 Connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

9.5.3 Electrical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

9.5.4 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

9.5.5 FC-AL transmitters and receivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

9.5.6 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

9.5.7 Fault LED Out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

9.5.8 Active LED Out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

9.5.9 Enable port bypass signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

9.5.10 Motor start controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

9.5.11 SEL_6 through SEL_0 ID lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

9.5.12 Device control codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

ii Cheetah 15K.4 FC Product Manual, Rev. C

9.6 Signal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9.6.1 TTL input characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9.6.2 LED driver signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.6.3 Differential PECL output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.6.4 Differential PECL input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

10.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Cheetah 15K.4 FC Product Manual, Rev. C iii

iv Cheetah 15K.4 FC Product Manual, Rev. C

List of Figures

Figure 1. Cheetah 15K.4 FC family disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Typical ST3146854FC drive, 2 Gbit, +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 3. Typical ST3146854FC drive, 2 Gbit, +5V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 4. Typical ST373454FC drive +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 5. Typical ST373454FC drive +5V current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 6. Typical ST336754FC drive +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 7. Typical ST336754FC drive +5V current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 8. ST3146854FC DC current and power vs. input/output operations per second . . . . . . . . . . . 30

Figure 9. ST373454FC DC current and power vs. input/output operations per second . . . . . . . . . . . . 31

Figure 10. ST336754FC DC current and power vs. input/output operations per second . . . . . . . . . . . . 32

Figure 11. Locations of the HDA temperature check point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 12. Recommended mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 13. Mounting configuration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 14. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 15. LED indicator connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 16. Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 17. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 18. Port bypass circuit physical interconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 19. FC-AL SCA device connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 20. J6 connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 21. FC-AL transmitters and receivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 22. Transmit eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 23. Receive eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Cheetah 15K.4 FC Product Manual, Rev. C v

1.0 Scope

This manual describes Seagate Technology® LLC, Cheetah® 15K.4 FC (Fibre Channel) disc drives.

Cheetah 15K.4 FC drives support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifi-

cations to the extent desc ribed in this manual. The F ibre Channel Interface Ma nual (part number 77767496)

describes the gener al Fibre Channe l Arbitrated Loop char acteristics o f this and other Seagate Fibre Channel

drives.

Figure 1. Cheetah 15K.4 FC family disc drive

Cheetah 15K.4 FC Product Manual, Rev. C 1

2 Cheetah 15K.4 FC Product Manual, Rev. C

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 equ ipment to provide adequate power and envi ronment in order to achi eve opti

mum performance and co mpliance with applicable indus try and governmental regulations. Special attention

must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regu

lation. In particula r, the drive must b e s ecur el y mou nted i n o rde r to gua ra nte e th e s pe ci fie d p er formance char-

acteristics. Mounting by bottom holes must meet the requirements of Section 8.5.

2.1 Standards

The Cheetah 15K.4 FC family comp lies with Seagate standards as noted in th e appropriate sections of this

manual and the Seagate Fibre Channel Interface Manual, part number 77767496.

The Cheetah 15K.4 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 integrati on and installation into a suitable encl osure prior to

use. As such the d rive is supplied as a subassembly and is not subject to Subpart B of Part 15 of the FCC

Rules and Regulation s nor the Radio Interference Reg ulations of the Canadian Departm ent of Communica

tions.

-

-

-

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 Regula

tions of the Canadian Department of Communications when properly packaged. However, it is the user’s

responsibility t o assure that the drive mee ts the appropriate EMI re quirements in their system. S hielded I/O

cables may be requir ed if the en closure do es not provi de adequate shieldi ng. If the I/O cab les are exte rnal to

the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host con

troller.

2.1.1.1 Electromagnetic susceptibility

As a component a ssembly, the drive is not requ ired to meet any susc eptibi lity perfor mance requ irements. It is

the responsibilit y of those integrating the dr iv e wit hin the ir s y ste ms to perform those tests req uire d a nd des ig n

their system to ensure th at equipment operating in the same sy stem as the drive or external to the syste m

does not adversely affect the performance of the drive. See Table

2, DC power requirements.

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

2.1.2 Electromagnetic compliance

Seagate uses an inde pendent laborato ry to confirm comp liance with the directives/standa rds for CE Markin g
and C-Tick Marking. The drive was tested in a representative system for typical applications. The selected sys
tem 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 co mplies with the European Union requirements of the El ectromagnetic
Compatibility Directive 89 /336/EEC of 03 May 1989 as amend ed by Dir ective 92 /31/ EEC of 28 Apri l 1992 an d
Directive 93/68/EEC of 22 July 1993.

Australian C-Tick

-

If this model has th e C-Tick Marking it complies with the Austr alia/New Zeal and Standard AS/NZS3548 199 5
and meets the Electromagnet ic Compatibility (EMC) Framework requi rements of Australia’s Spectrum Man
agement 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 Electroma gnetic
Compatibility Framework requirements of the Radio Research Laborator y (RRL) Ministry of Information and
Communication Republic of Korea.

Taiwanese BSMI

If this model has the Chinese National Standard (CNS) 13438 marking, it complies with Chinese National Stan­dard (CNS) 13438 an d meets the Electromagnetic Compatibil ity (EMC) Framework requir ements of the Tai­wanese Bureau of Standards, Metrology, and Inspection (BSMI).

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4 Cheetah 15K.4 FC Product Manual, Rev. C

2.2 Reference documents

Cheetah 15K.4 FC Installation Guide Seagate part number: 100220460

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.4 FC Product Manual, Rev. C 5

6 Cheetah 15K.4 FC Product Manual, Rev. C

3.0 General description

Cheetah 15K.4 FC drives com bi ne gi ant m agn etores i stive (GMR) heads, partial respo nse/ma xi mu m li ke li hoo d

(PRML) read channel ele ctronics , embedded ser vo technolog y, and a Fibre Channel interface to pr ovide hig h

performance, high capac ity data storage f or a variety of systems including engineering wo rkstations, netwo rk

servers, mainframes, and supercomputers. Cheetah 15K.4 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.4 FC drives supp ort the Fibre C hannel Ar bitrated Loo p (FC-AL) an d SCSI Fi bre Channel P roto-

col as described in the ANSI specifications, this document, and the Fibre Channel Interface Manual (part num-

ber 77767496) which describes the general interface characteristics of this drive. Cheetah 15K.4 FC drives are

classified as intelligent peripherals and provide level 2 conformance (highest level) with the ANSI SCSI-1 stan

dard.

Never disassemble the HDA a nd do not at tempt to service ite ms in the sealed enclo su re (hea ds , m edi a, ac tu-

ator, etc.) as this requires sp ecial facilities. The drive does not contain user-replaceab le parts. Opening the

HDA for any reason voids your warranty.

Cheetah 15K.4 FC drives u se a dedicated l anding zone a t the innermo st radius o f the media to el iminate the

possibility of destroying or degrading data by landing in the data zone. The heads automatically go to the land

ing zone when power is removed from the drive.

An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur-

ing shipping and h andling. The shipping lock disengages and th e head load process be gins when power is

applied to the drive.

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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.

Cheetah 15K.4 FC Product Manual, Rev. C 7

3.1 Standard features

Cheetah 15K.4 FC drives have the following standard featur es :

• 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-select a ble lo gi cal bl o ck si ze (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 alumi num sub st rat e co ated with a thin fi lm magn eti c mater ia l, over coate d
with a proprietary protective layer for improved durability and environmental protection.

8 Cheetah 15K.4 FC Product Manual, Rev. C

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 (spindle stops spinning)

• Adaptive seek velocity; improved seek performance

3.4 Reliability

• 1,400,000 hour MTBF

• Increased LSI circuitry integration

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

• Dithering

3.5 Formatted capacities

Standard OEM models are formatted to 512 bytes per block. The sector size is selectable at format time. Users
having the necessary equipm ent may mo dify the data block s ize before issuing a fo rmat comm and and obtain
different formatted capacities than those listed.

To provide a stable target capacity environment and at the same time provide users with flexibility if they
choose, Seagate recommends product planning in one of two modes:

1. Seagate designs specify capacity points at certain sector sizes that Seagate guarantees current and future
products will meet. We recommend custo mers use this capacity in their project pl anning, as it ensures a
stable operating point with backw ard and forward c ompatibi lity from gener ation to generati on. The curren t
guaranteed operating points for this product are:

ST336754FC ST373454FC ST3146854FC

Sector Size

Decimal Hex Decimal Hex Decimal Hex

512 71,687,372 445DCCC 143,374,744 88BB998 286,749,488 11177330
514 70,512,692 433F034 141,025,384 867E068 282,050,768 10CFC0D0
520 70,197,546 42F212A 140,395,092 85E4254 280,790,184 10BC84A8
522 68,914,176 41B8C00 139,463,602 8500BB2 279,041,740 10A1D6CC
524 68,766,592 4194B80 137,577,184 83342E0 275,154,368 106685C0
528

2. Seagate drives also may be used at the maximum available capacity at a given sector size, but the excess
capacity above the guaranteed level will vary between 10K and 15K families and from generation to gener
ation, depending on how each sector si ze actually for mats out for zone frequencies an d splits over serv o
bursts. This added capaci ty potent ial may range from 0.1 to 1.3 percent above th e guarant eed capacities
listed above. Us ing th e dr ives in th is mann er gi ves the ab so lute m aximu m capacity poten tial, but the user
must determine if the extra ca pacity potential is useful, or whether their assurance of backward and for
ward compatibility takes precedenc e.

3.5.1 Programmable drive capacity

Using the Mode Select command, the drive can change its capacity to something less than maximum. See the
Mode Select Parameter List table in the SCSI Interface Product Manual. Refer to the Parameter list block
descriptor number of blocks field. A value of zero in the number of blocks field indicates that the drive shall not

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Cheetah 15K.4 FC Product Manual, Rev. C 9

change the capacity it i s currently forma tted to have. A number in the n umber of block s field that is less than
the maximum numbe r of LBAs changes th e total driv e capacity t o the val ue in the block des criptor number of
blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum capacity.

3.6 Factory-install ed accessories

OEM standard drives are shipped with the Cheetah 15K.4 FC Installation Guide (part number 100220460) and
the Safety and Regulatory Agency Specifications, part number 75789512 (unless otherwise specified).

3.7 Factory-install ed options

You may order the follow ing items which are incorpor ated at the manufacturing fa cility 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 shippi ng pack. The drive is normally shipped in bulk packag ing to provide maximum p rotection
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.4 FC Installation Guide, part number 100220460, is usually inc luded with eac h standard
OEM drive shipped, but extra copies may be ordered.

• The Safety and Regulatory Agency Specifications, part number 75789512, is usually included wit h each
standard OEM drive shipped, but extra copies may be ordered.

3.8 User-installed accessories

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

• Evaluation kit, part number 73473641.
This kit provides an adapter card (“T-card”) to allow cable connections for two FC ports and DC power.

• Single-unit shipping pack.

10 Cheetah 15K.4 FC Product Manual, Rev. C

4.0 Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of
Cheetah 15K.4 FC drives.

4.1 Internal drive characteristics

ST3146854FC ST373454FC ST336754FC
Drive capaci ty 146.8 73.4 36.7 Gbytes (formatted, rounded off value)
Read/write data heads 8 4 2
Bytes per track 471,916 471,916 471,916 Bytes (average, rounded off values)
Bytes per surface 18,351 18,351 18,351 Mbytes (unformatted, rounded off value)
Tracks per surface (total) 50,864 50,864 50,864 Tracks (user accessible)
Tracks per inch 85,000 85,000 85,000 TPI
Peak bits per inch 628 628 628 KBPI
Internal data rate 685-1 , 14 2 685-1,142 685-1,142 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 ph ys i cal inte r fac e" on page 64 and the Fibre Cha nnel Inte rface Manual (part num ber

77767496) for additional timing details.

4.2.1 Access time

Not including controller overhead
Read Write

Average Typical 3.5 4.0
Single track Typical 0.2 0.4
Full stroke Typical 7.4 7.9

1. Typical access times are measured under nominal conditions of temperature, voltage,

and horizontal orientation as measured on a representative sample of drives.

2. Access to data = access time + latency time.

1,2

(msec)

Cheetah 15K.4 FC Product Manual, Rev. C 11

4.2.2 Format command execution time (minutes)

ST3146854FC ST373454FC ST336754FC

Maximum (with verify)
Maximum (without veri fy )

90 60 30
45 30 15

4.2.3 General performance characteristics

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

Minimum 685 Mbits/sec
Maximum 1,142 Mbits/sec

Fibre Channel Interface maximum instantaneous transfer rate 20 0 Mby tes /s ec * per port

Logical block sizes

Default is 512-byte data blocks
Variable 512 to 704 byt es 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 Yes

Flaw reallocation per formance i mpac t (for flaws rea llocated a t format tim e
using the spare sectors per sparing zone reallocation scheme.)

Average rotation al lat enc y 2.0 msec

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

(dual port = 400 Mbytes/sec*)

Negligible

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 ex ceed 20 s econds. Stop time is 3 0 seconds ( maximum) from removal of DC
power.

If the Motor Start option is enabled, the internal controller accep ts the commands listed in the Fibre Channel
Interface Manual less than 3 sec onds after DC power has been appli ed. After the Motor Start command has
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-se gmented cache control algori thms that in many
cases can enhan ce system performance. Cac he refers to the drive buffer stor age space when it is used in
cache operations . To select this feature, the host sends the Mode Select com mand with the proper va lues in

12 Cheetah 15K.4 FC Product Manual, Rev. C

the applicable bytes in page 08h. Prefetch and cache operations are independent features from the standpoint
that each is enabled and dis abled indepe ndently using the Mode Select c ommand; however, in actual opera
tion, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.

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

16.

4.5 Cache operation

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

Of the 8,192 kbytes p hysical buffer space in the drive , approximately 7,077 k bytes can be used as a cache.
The buffer can be divided into logical segments (using Mode Select Page 08h, byte 13) from which data is read
and to which data is written.

The drive keeps track of the logical block addresses of the data stor ed in each segment of the buffer. If the
cache is enabled (see RCD bit in the Fibre Chann el In ter fac e M anua l
command is retrieved from the buffer, if possible, before any disc access is initiated. If cac he operation is not
enabled, the buffer (still segm ented with the required number of s egments) is still used, but only as ci rcular
buffer segments during disc medium read operations (disreg arding Prefetch operatio n 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 hos t. 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 (dis
connect/reconnect control) in the Fibre Channel Interface Manual.

), data requested by the host wi th a rea d

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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 i s reached that is not in an y cache se gment, the dri ve fetches it and any

remaining requested lo gical b lock a ddres ses from th e disc and puts them in a seg ment o f the cache . The
drive transfers the r emaining requested logical blocks from t he cache to the host in a ccordance 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 lo gical bl ocks from t he disc and transfe rs them int o a segme nt, 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 cross es a cylinder boundary to fetc h data only if the Disco ntinui ty (DISC) bit is se t

to 1 in bit 4 of byte 2 of the Mode Select parameters page 08h. Default is zero for bit 4.
Each cache se gment is actually a s elf-contained circula r buffer whose length is an integer number of logical

blocks. The wrap-ar ound capability of the individual segm ents greatly enhances the cache’s ove rall perfor
mance, allowing a wide range of user-sele ctable configurations. The d rive supports operation of any integer
number of segments from 1 to 32. Div ide the 7,077 Kbyte s in the b uffer by the numbe r of seg ments to get th e
segment size in bytes; then divide by the sector size to get the number of sectors per segment, any partial sec
tors remaining are not used. Default is 3 segments.

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Note. The size of each segment is not reported by Mode Sense c ommand page 08h, bytes 14 and 15 .

The value 0XFFFF is always reported regardless of t he a ctu al size of th e segm ent . Se ndi ng a si ze
specification using the Mode Select command (byt es 14 and 15) does not set up a new segment

Cheetah 15K.4 FC Product Manual, Rev. C 13

size. If the STRICT bit in Mode page 00h (byte 2, bit 1) is set to one , the driv e respon ds 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 th at mak es use of a drive buffer sto ra ge 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 s ame buffer space an d segme ntation is use d as set up for read func tions.
The buffer segmentation s cheme is set up or changed independently, having nothing to do with the state of
RCD. When a write command is issued, i f RCD=0, the cache is first checke d to see if any logical blocks tha t
are to be written are a lready stored in the cache f rom a previous read or write comman d. If there are, the
respective cache segments are cleared. The new data is cached for subsequent Read commands.

If the number of write data logical blocks exceed the size of the segment being written into, when the end of the
segment is reached, the data is written into the beginning of the same cache segment, overwriting the data that
was written there at the 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 befor e the data has been written to the medium. If an error oc curs
while writing the data to the medium, and Good status has already been returned, a deferred error will be gen
erated.

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.

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Table 16 shows the mode default settings for the drive.

4.5.2 Prefetch operation

If the Prefetch fea ture i s ena bl ed, data in co nti guo us lo gic al b lock s on t he d is c immediately beyond tha t whi ch
was requested by a Read c ommand are retrieved and stored in the buffer for immediate transfer from the
buffer to the host on subseque nt Read com mands that request t hose logica l block s (this is tr ue 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 pr efetch ed r eplaces data alr eady in som e b uffer segmen ts, the ho st can limit the a mount o f
prefetch data to optimize system per formance. 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 cros ses a cylinder boundary to fetch more data only if Mode param ete rs
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 opera tes 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 co ntiguous blocks of data (e.g. “software interleave ”). ARLA disables pref etch 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 no t for c ontiguous bloc ks of data , ARLA d isables pr efetc h, but as long as seq uentia l read
operations request contiguous blocks of data, ARLA keeps prefetch enabled.

14 Cheetah 15K.4 FC Product Manual, Rev. C

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 con figure the cache to respond q uickly to repetitive ac cesses of multiple s mall segmen ts of data
without taking the time to “look ahea d” to the next conti guous segmen ts of data. In a server environ ment, you
want to configure the cac he to provide large volumes of seque ntial data in a non-repetitive manner. In this
case, the ability of the cache to “look ahead” to the next contiguous segmen ts of sequential data is a good
thing.

The Performance Mode (PM) bit contr ols the way the drive switches the cache buffer into different modes o f
segmentation. In “server mode” (PM bit = 0), the drive can dynamically cha nge the number of cache buffer
segments as needed to opt imize the performa nce, based on the command st ream from the hos t. In “desktop
mode” (PM bit = 1), the number of segments is maintained at the value defined in Mode Page 8, Byte 13, at all
times. For additio nal information about the PM bit , refer to the Unit Attention Parame ters page (00h) of the
Mode Sense command (1Ah) in the Fibre Channel Interface Product Manual, part number 77767496.

Cheetah 15K.4 FC Product Manual, Rev. C 15

16 Cheetah 15K.4 FC Product Manual, Rev. C

5.0 Reliability specifications

The following reli ability specifica tions assume co rrect host and drive operational interfa ce, including al l 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:

MTBF: 1,400,000 hours
Preventive maintenance: None required

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

1

5.1 Error rates

The error rates stated in this manual assume the following:

• The drive is operated in accordance with this manual u sing DC power as defined in paragraph 6.2, " DC

power requirements."

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

• Assume random data.

• Default OEM error r ecovery settings are applied. Thi s includes AWRE, ARRE, full read retries, fu ll write

retries and full retry time.

Less than 10 errors in 108 seeks

Less than 10 errors in 1012 bits transferred (OEM default settings)
Less than 1 sector in 1015 bits transferred
Less than 1 sector in 1021 bits transferred
Less than 1 error in 1012 bits transferred with minimum receive eye.

Less than 1 error in 1014 bits transferred with typical receive eye.
See Section 9.6.4, "Differential PECL input." on page 72

5.1.1 Recoverable Errors

Recovereable errors are those detected and corrected by the drive, and do not require user intervention.
Recoverable Data errors will use co rrection, although ECC on -the-fly is not c onsidered for purposes of recov-

ered error specifica tio ns.
Recovered Data error rate is determine d using read bits transfer red for recove rable errors occurring dur ing a

read, and using write bits transferred for recoverable errors occurring during a write.

5.1.2 Unrecoverable Erro rs

Unrecoverable Data Error s (Sense Ke y = 03h) ar e specified at l ess than 1 se ctor in erro r per 1015 bits trans­ferred. Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block.

Cheetah 15K.4 FC Product Manual, Rev. C 17

5.1.3 Seek errors

A seek error is defined as a fail ur e of the dr i ve to pos it ion the heads to the addressed t rack . After dete cti ng a n
initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails,
a seek positioning error (Error code = 15h or 02h) will be reporte d with a Hardware error (04h) in t he Sense
Key. Recoverable seek erro rs are sp ecified at Le ss than 10 erro rs in 10

8

seeks. Unrecoverable seek errors

(Sense Key = 04h) are classified as drive failures.

5.1.4 Interface errors

An interface error is defin ed as a failure of the receiver on a port to recover the d ata 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 de vices is the su m of the individual device error
rates.

5.2 Reliability and service

Y ou can enhance the reliability of Cheetah K15.4 disc drives by ensuring that the drive receives adequate cool­ing. Section 6.0 provides temperature measure ments and other informa tion that m ay be used to enhanc e the
service life of the drive. Section 8.3 provides recommended air-flow information.

5.2.1 Mean time between failure (MTBF)

The production disc drive achieves an MTBF of 1,400,000 hours when operated in an environment that
ensures the case temperatu res specified in Section
specification limi ts of the operati ng en vi r onm ent wi ll not affect MTBF perfo rm anc e. Oper a tin g the dr iv e at c ase
temperatures above these values will adversely affect the drive’s ability to meet specifications (see
"Environmental limits" ).

6.4.1 are not ex ceeded. Short-term excursions up to the
Section 6.4,

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 p eriod

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 dis c driv e mu st hav e accu mul ate d at lea st ni ne mon ths of operati on . Data is calculate d
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 indic ates that the drive i s deterior ating to an immin ent failu re and is co nside red

an MTBF hit.

5.2.2 Preventive maintenance

No routine scheduled preventive maintenance is required.

18 Cheetah 15K.4 FC Product Manual, Rev. C

5.2.3 Hot plugging the drive

Inserting and removin g the drive on the FC-AL will i nterrupt loop o peration. T he interrupti on occurs when th e
receiver of the nex t device in t he loop mus t synchro nize to a differen t input si gnal. FC e rror detecti on mecha
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 defau lts to the FC- AL Mo nitoring state, Pas s-thro ugh state, w hen it is powe red- on by swi tchin g
the power or hot plugg ed. The cont rol line to an optiona l port bypass c ircuit (exte rnal to th e drive), def aults 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 sy s tems in teg rat or to a ss ure th at no temperature, energy, voltage haz-

ard, or ESD potential haza rd is presented dur ing the hot connect/di sconnect oper ation. 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.

5.2.4 S.M.A.R.T.

S.M.A.R.T. is an acronym for Self-Mon itoring Ana lysis and Re porting Technology. This technology is intended
to recognize conditio ns that indicate imminent drive failure and is desig ned to provide sufficient warn ing 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 a ttrib ute has b een sele cted to moni tor a specifi c se t of fai lure c onditi ons in th e oper ating per ­formance of the drive and the thresholds are optimized to minimize “false” and “failed” predictions.

Controlling S.M.A.R.T.

The operating mode of S.M.A.R.T. is controlled by the DEXCPT and PERF bits on the Informational Exceptions
Control mode page (1Ch). Use th e DEXCPT bit to ena ble or disab le the S.M.A.R. T. feature. Setting the DE X
CPT 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 consi dered to be in “On-line Mod e
Only” and will not perform off-line functions.

You can measure off-line attr ibutes and for ce the drive to sa ve the data by usi ng the Rezero Uni t 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 c ontrol when S.M.A.R.T. interruptions occur. Forcing S.M.A.R.T. with the RTZ command
resets the timer.

-

Cheetah 15K.4 FC Product Manual, Rev. C 19

Performance impact

S.M.A.R.T. attribute data is saved to the disc so that the events that ca used a predictive fai lure can be recr e­ated. The drive measures and sav es paramete rs once ever y two hours su bject to an id le period on the FC-A L
bus. The process o f meas uring off-l ine att ribute da ta and saving data to the di sc is uninte rruptable. The max i
mum 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

42 milliseconds

Fully-enabled delay
DEXCPT = 0, PERF = 0

163 milliseconds

Reporting control

Reporting is controlled by the MRIE bits in the Inform ational Exceptio ns Control mode page (1Ch). Subject to
the reporting metho d, t he firmw are w ill is sue to the h ost a n 0 1-5Dxx sense code. The error code is pr eserve d
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 attribu te. The in terval de fine s the numb er of operati ons over which to mea sure 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 an d their inte rval. If the nu mber of error s exceed s the thr eshold bef ore
the interval expires, the error rate i s considered to be unacc eptable. 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 inter
val and failure counters are reset and the process starts over.

-

Predictive failures

S.M.A.R.T. signals predictive failures when the drive is performi ng unacc eptably for a peri od of time. The fir m­ware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accom­plish this, a cou nter is i ncremen ted each time the error rat e is un acceptable and decr emented (not to e xceed
zero) whenever t he error ra te is a cceptabl e. If the co unter contin ually in crem ents such that it reache s the pr e
dictive threshol d, a predictive failure is signaled. This counter is r eferred to as the Failure H istory Counter.
There is a separate Failure History Counter for each attribute.

5.2.5 Thermal monitor

Cheetah 15K.4 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 monito rs the drive temperature and is sues a warning over the int erface when the tem­perature exceeds a s et threshol d. The temper ature is measured at power-up an d then at te n-minute intervals
after power-up.

-

20 Cheetah 15K.4 FC Product Manual, Rev. C

The thermal monitor syste m generates a warn ing code of 01- 0B01 when the temp erature exceeds th e speci­fied limit in compl iance with the SCSI standard. T he drive temperature is repo rted in the FRU code field o f
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 impl ements two temperature trip points. The first trip point is set at 65°C which is the
maximum temperatur e limit a ccordi ng to th e dri ve spec ific ation. T he secon d trip point is us er-se lectable using
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 g reater than 65°C in this fi eld, the temperature is rou nded
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

5.2.6 Drive Self Test (DST)

Drive Self Test (DST) is a technolo gy designed to recognize dri ve 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 s hort test is time-r estricted and limited i n length—it does n ot scan the
entire media surface, but does some fundamental tests and scans portions of the media.

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

5.2.6.1 DST failure definition

The drive will presen t a “diagnostic failed” con dition through the self-te sts results value of the diagnos tic log
page if a functional failur e is enco untered du ring DST. The channel and servo parameters are not mod ified to
test the drive more strin gently, and the number of retries are not redu ced. All retries and recovery proce sses
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.

Cheetah 15K.4 FC Product Manual, Rev. C 21

5.2.6.2 Implementation

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

5.2.6.2.1 State of the drive prior to testing

The drive must be in a ready state before issuing the Send Diagno stic command . There are multipl e 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
In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.

5.2.6.2.2 Invoking DST

To invoke DST, submit the Send Diagnostic c ommand wi th the appropr iate Fun ction Code ( 001b for the sh ort
test or 010b for the extended test) in bytes 1, bits 5, 6, and 7.

5.2.6.2.3 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 th ree s egm ents: a n el ec tric al test segm ent, a servo test segment , and a rea d/v er ify s ca n

segment.

Short test (Function Code: 001b)

The purpose of the short test is to provide a time-l imit ed te st tha t t e sts as m uch of the drive as possible within
120 seconds. The shor t test does not scan the entire me dia surface, but does some fu ndamental 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 tes t the pos it ion ing mec han ism. T he read op erati on tes ts the read hea d ele men t
and the media surface. The write element is tested throu gh read/write/read operations. The inte grity of the
media is checked through a r ead/verif y scan of the med ia. Motor functio nality is tested by d efault as a part of
these tests.

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

22 Cheetah 15K.4 FC Product Manual, Rev. C

5.2.6.2.4 Log page entries

When the drive begi ns DST, it creates a new entry in the Self -te st Resul ts Log page . The new entr y is c reated
by inserting a new self-test parameter block at the beginning of the self-test results log parameter section of the
log page. Existing da ta will be moved to make room f or the new parameter block. The dr iv e rep or ts 20 par am
eter 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 dr i ve upda tes the Sel f- Test Results Value field in its Self-

Test Results Log page in non-volatile m e mo ry. The host may use Log Se ns e to re ad th e res ul ts from up to th e
last 20 self-tests performed by the drive. The self-test results value is a 4-bit field that reports the results of the
test. If the field is 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 th e failure condition and LBA (i f applicable) in the Self-tes t Results Log parameter. The
Sense key, ASC, ASCQ, and FRU are used to report the failure condition.

5.2.6.2.5 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 backgrou nd mode by us ing the abor t code in the DS T Functio n Code field .
This will cause a 01 ( self-test aborted b y the application cl ient) code to appear i n the self-test results v alues
log. All other abort mechanisms will be reported as a 02 (self-test routine was interrupted by a reset condition).

5.2.7 Product warranty

Beginning on the da te of shipment to the customer and contin uing for the period spe cified in your purchas e
contract, Seagate wa rra nts that e ach pro duct (i nclud ing com pon ents and su basse mblie s) that fails t o fu nction
properly under normal use due to defect in materials or workmanship or due to nonconformance to the applica
ble specifications will be repaired or replaced, at Seagate’s option and at no charge to the customer, if returned
by customer at cus tomer’s expense to S eagate’s designated facility in ac cordance with Seagate’s warranty
procedure. Seagate will pay for tr an sp or tin g th e repa ir or rep lac em ent ite m t o th e c us tome r. For more detailed
warranty information, refer to the standard terms and conditions of purchase for Seagate products on your pur
chase 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 remain ing war ranty 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 refus e rece ipt of compo nents impro perly packaged or obviou sly damag ed in tran­sit. Contact your author ized Seag ate distr ibutor to purchas e additio nal boxe s. Seagat e recom mends sh ipping
by an air-ride carrier experienced in handling computer equipment.

-

-

Cheetah 15K.4 FC Product Manual, Rev. C 23

Product repair and return information

Seagate customer se rvice centers are th e only facilities au thorized to service Sea gate drives. Seagate d oes
not sanction any third-party repair fac ilities. Any unauthorized repair or tamper ing with the factory seal voids
the warranty.

24 Cheetah 15K.4 FC Product Manual, Rev. C

6.0 Physical/electrical spe cifications

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 requir ements for a single driv e are sh‘own bel ow. Values indicated apply at the drive
connector.

Table 2: DC power requirements for operation in 2Gb mode

ST3146854FC ST373454FC ST336754FC

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 [1] [7] 0.94 0.78 0.92 0.57 0.94 0.43
Maximum starting current

(peak DC) DC 3σ [3] 1.07 1.91 1.08 1.88 1.08 1.58

(peak AC) AC 3σ [3] 1.36 3.87 1.44 3.98 1.37 3.30
Delayed motor start (max) DC 3σ [1] [4] 0.60 0.03 0.59 0.03 0.59 0.03
Peak operating current:
Typical DCX [1] [6] 1.03 1.18 1.01 1.00 0.99 0.88
Maximum DC 3σ [1] 1.04 1.19 1.03 1.02 1.00 0.88
Maximum (peak) DC 3s 1.56 2.84 2.00 2.78 2.02 2.54

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

[1] Measure d with average r eading DC ammeter. Instantaneous +12V cu rrent peaks will e xceed these va l-

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 du ring initial spindle s tart but m u st r etu rn to ±5% before re achin g

15000 RPM. The ±5% must be maintained after the driv e signifies that its power-up sequen ce 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 con dition occurs when th e Motor Start option is enabled and the drive has not yet r eceived a Start

Motor command.
[5] See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes rip ple , nois e, and

transient response.
[6] Operating condition is defined as random 8 block reads at 309 I/Os per second for ST31468 54FC and

Cheetah 15K.4 FC Product Manual, Rev. C 25

314 I/Os per second for S T 373 454 FC and ST3 367 54F C m ode ls . Curr en t an d po wer spec ifi ed at n omi nal
voltages. Decreasing +5 vo lt supply by 5% inc reases 5 Volt current by 2.5%. Decre asing +12 vol t supply
by 5% increases 12 volt current by 3.0% (2% for ST373454FC and ST336754FC models).

[7] During i dle, the drive heads are relocated every 6 0 seconds to a random l ocation within the ban d from

three-quarters to maximum track.

General DC power requirement notes.

1. Minimum current loading for each supply voltage is not less than 1.2% o f the ma ximum oper ating cu rrent
shown.

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

3. Where power is provided to multiple drives from a common supply, careful consideration for individual
drive power requirem ents s hou ld b e no ted. Whe re mul ti ple uni ts are pow er ed o n s imu ltaneou sl y, 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.

6.2.1 Conducted noise immunity

Noise is specified a s a periodic an d random distri bution of frequenc ies covering a band from DC to 10 MHz.
Maximum allowed nois e values given below are peak-to -peak measurements and apply at the driv e power
connector.

+5 V = 250 mV pp from 0 to 100 kHz to 20 MHz.
+12 V = 800 mV pp from 100 Hz to 8 KHz.

450 mV pp from 8 KHz to 20 KHz.
250 mV pp from 20 KHz to 5 MHz.

6.2.2 Power sequencing

The drive does not require power sequenci ng. The drive prote cts against inadver tent writing dur ing power-up
and down.

6.2.3 Current profiles

The +12V and +5V current pr ofi les for the ST314 685 4F C, ST3 734 54F C, an d ST336754FC models are show n
below in the following figures.

Note: All times and currents are typical. See Table 2 for maximum current requirements.

26 Cheetah 15K.4 FC Product Manual, Rev. C

Figure 2. Typical ST3146854FC drive, 2 Gbit, +12V current profile

Figure 3. Typical ST3146854FC drive, 2 Gbit, +5V current profile

Cheetah 15K.4 FC Product Manual, Rev. C 27

Figure 4. Typical ST373454FC drive +12V current profile

Figure 5. Typ i cal ST3734 54FC dr ive +5V current profile

28 Cheetah 15K.4 FC Product Manual, Rev. C

Figure 6. Typical ST336754FC drive +12V current profile

Figure 7. Typ i cal ST3367 54FC dr ive +5V current profile

Cheetah 15K.4 FC Product Manual, Rev. C 29

6.3 Power dissipation

ST3146854FC

Typical power dissipation under idle conditions in 2Gb operation is 13.96 watts (47.6 BTUs per hour).
To obtain operating power for typical random read operations , refer to the following I/O rate curve (see Figur e

8). Locate the typica l I/O rate for a drive i n your sys tem on the h orizontal axi s and read th e corres ponding + 5

volt current, +12 vol t c ur rent, and tota l wa tts on the v er ti cal a xi s. To calculate BTUs per hour, multiply watts by

3.4123.

ST 314 6854FC DC CURRENT/POWER vs THROUGHPUT (2 Gb)

R ando m 8 Block Reads

20.00

18 .0 0

16 .0 0

14 .0 0

12 .0 0

10 .0 0

8.00

5Volt A
12 Vo l t A
Watts

Power (watts)

Amperes

1.8 0 0

1.6 0 0

1.4 0 0

1.2 0 0

1.0 0 0

0.800

0.600

0.400

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0

6.00

4.00

I/Os per Second

Figure 8. ST3146854FC DC current and power vs. input/output operations per second

30 Cheetah 15K.4 FC Product Manual, Rev. C

ST373454FC

Typical power dissipation under idle conditions in 2Gb operation is 11.49 watts (39.21 BTUs per hour).
To obtain operating power for typical random read operations , refer to the following I/O rate curve (see Figur e

8). Locate the typica l I/O rate for a drive i n your sys tem on the h orizontal axi s and read th e corres ponding + 5
volt current, +12 vol t cur r ent, and total wa tts on the v erti ca l a xis . To calculate BTUs per hour, multiply watts by

3.4123.

ST373454LC Specification random 8 block read, 2Gb

1.8 0 0

1.6 0 0

1.4 0 0

18 .0 0

16 .0 0

14 .0 0

5Volt A
12 Vo l t A
Watts

1.2 0 0

1.0 0 0

0.800

12 .0 0

10 .0 0

8.00

Amperes

0.600

0.400

0.200

0.000

0.0 50.0 100.0 150. 0 200.0 250.0 300.0 350.0 400.0

6.00

4.00

2.00

0.00

I/Os per Second

Figure 9. ST373454FC DC current and power vs. input/output operations per second

Power (watts)

Cheetah 15K.4 FC Product Manual, Rev. C 31

ST336754FC

Typical power dissipation under idle conditions in 2Gb operation is 9.88 watts (33.7 BTUs per hour).
To obtain operating power for typical random read operations , refer to the following I/O rate curve (see Figur e

8). Locate the typica l I/O rate for a drive i n your sys tem on the h orizontal axi s and read th e corres ponding + 5

volt current, +12 vol t c ur rent, and tota l wa tts on the v er ti cal a xi s. To calculate BTUs per hour, multiply watts by

3.4123.

ST336754FC Specification random 8 block read

1.8 0 0

1.6 0 0

1.4 0 0

18 .0 0

16 .0 0

14 .0 0

5Volt A
12 Vo l t A
Watts

1.2 0 0

1.0 0 0

0.800

Amperes

0.600

0.400

0.200

0.000

0.0 50.0 100.0 150. 0 200.0 250.0 300.0 350.0 400.0

I/Os per Second

12 .0 0

10 .0 0

8.00

6.00

4.00

2.00

0.00

Power (watts)

Figure 10. ST336754FC DC current and power vs. input/output operations per second

6.4 Environmental limits

Temperature and humidity values experi enc ed by the dri ve mus t be s uc h that cond ens ati on does not occ ur on
any drive part. Altitude and atmospheric pressu re specifications are refer enced 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

The maximum allowable continuous or sustained HDA case temperature for the rated MTBF is 122°F
(50°C) The maximum allo wable HDA cas e temper ature is 60°C. Oc casiona l excu rsio ns of HDA ca se t em
peratures above 12 2°F ( 50 °C) or b elo w 41 °F (5° C ) may o ccur wi tho ut im pact to spe ci fie d M T BF. Continual
or sustained operation at HDA case temperatures outside these limits may degrade MTBF.

Provided the HDA case temperatures limits are met, the drive meets all specifications over a 41°F to 131°F
(5°C to 55°C) drive ambient temperatu re range with a maximum temper ature gradient of 36°F (20°C) per
hour. Air flow may be needed in the drive enclosure to keep within this range (see Section 8.3). Operation at
HDA case temperatures outside this range may adversely affect the drives ability to meet specifications. To
confirm that the require d cooling for the electronic s and HDA case is provided, pla ce the drive in its final
mechanical configurati on, perform random w rite/read operations and measure the HDA case tem perature
after it has stabilized.

-

32 Cheetah 15K.4 FC Product Manual, Rev. C

b. Non-operating

H

C

–40° to 158°F (–40° to 70°C) package ambient with a maxim um 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.

DA Temp.
heck 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 lim its specifie d in this docum ent are measur ed directl y on the driv e chassis . If the drive is
installed in an e nclosure to which the stated shock and/or vibra tion cri teria is ap plied, reson ances may occur
internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent,
it may be necessary to modify the enclosure to minimize drive movement.

The limits of shock and vibr ation define d within this doc ument are spec ified with the d rive mounted by any of
the four methods show n i n Fig ure

12, and in accordance with t he r es tri cti ons o f S ect ion 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 dur ation 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.

Cheetah 15K.4 FC Product Manual, Rev. C 33

b. Operating—abnormal

Equipment, as installed for norma l operation, does not incur physical damage while subjected to intermit­tent shock not exce eding 40 Gs at a maximum duratio n of 11 msec (half sinewave). Shock occurring at
abnormal levels may promote degraded operational performance during the abnormal shock period. Speci
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 c onditions of handl ing and transpo rtation. This inc ludes
both isolated drives and integrated drives.

The drive subjected to nonrepetitive sh ock not exceeding 7 5 Gs at a maximum d uration of 11 msec (half
sinewave) shall n ot exh ibit dev ice d amage or pe rformanc e deg radation . Sh ock may be ap plied in the X, Y,
or Z axis.

The drive subjected to no nrepetitive shock not ex ceeding 250 Gs at a ma ximum duration of 2 msec ( half
sinewave) does not exhibi t device dam age or pe rforman ce degr adati on. Shock m ay be appl ied in th e X, Y,
or Z axis.

The drive subjected to no nrepetitve shock not exc eeding 10 0 Gs at a maxim um duration of 0.5 msec (hal f
sinewave) does not exhibi t device dam age or pe rforman ce degr adati on. Shock m ay be appl ied in th e X, Y,
or Z axis.

d. Packaged

Disc drives shipped as loose load (no t palletized) g eneral frei ght will b e packaged to w ithstand drops f rom
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 mul tipacks with a gross weight o f 20 pounds (8.95 k g) or less by Se agate for
general freight ship ment shal l withstand a drop t est from 48 inches (1, 070 mm) aga inst a co ncrete floor or
equivalent.

34 Cheetah 15K.4 FC Product Manual, Rev. C

Z

Y
X

Figure 12. Recommended mounting

X

Z

Y

Cheetah 15K.4 FC Product Manual, Rev. C 35

6.4.4.2 Vibration

a. Operating—normal

The drive as installed for normal ope ration, shall comply with the complete specif ied 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 g RMS

b. Operating—abnormal

Equipment as installed for normal operation shall not in cur physical damage while subj ected 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 g RMS

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 i ncur ph ysi cal damag e or d egrad ed perfor manc e as a r esult of con tinuous vibra tion no t
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 g RMS

6.4.5 Air cleanliness

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

6.4.6 Corrosive environment

Seagate electronic driv e components pass accelerated cor rosion testing equivalent to 10 years exposure to
light industrial envir onments containi ng sulfuro us gases, chlorine an d nitric oxide , classes G and H per ASTM
B845. However, this accelerated testing cannot duplicate every potential application environment.

Users should use cauti on exposing any ele ctronic compo nents to uncontrolled c hemical pollutan ts and corro­sive chemicals as electronic drive component reliability can be affected by the installation environment. The sil­ver, copper, nickel and gold films us ed in Sea gate produc ts are especi ally sensitiv e to the presen ce of sulfide ,
chloride, and nitrate contaminants. Sulfur is found to be the most damaging. In addition, electronic components
should never be ex pose d to c ondensin g water on the surfac e of th e pri nted cir cuit bo ard a ssembly (PCBA ) or
exposed to an ambient relative humidity greater than 95%. Materials used in cabinet fabrication, such as vulca
nized rubber, that can outgas corros ive compounds should be m inimized or e liminated. The us eful life of any
electronic equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.

36 Cheetah 15K.4 FC Product Manual, Rev. C

-

6.4.7 Acoustics

Sound power during idle mode shall be 3.6 bels typical when measured to ISO 7779 specification.
There will not be any discrete tones more than 10 dB above the masking nois e on typical drives when mea-

sured according to Sea gate specificat ion 30553-001 . There will not be any tones more than 24 dB abo ve the
masking noise on any drive.

6.4.8 Electromagnetic susceptibility

See Section 2.1.1.1.

Cheetah 15K.4 FC Product Manual, Rev. C 37

6.5 Mechanical specifications

The following nominal di men sion s ar e exc lus ive of the decorative front panel acces sor y. However, dimensions
of the front panel are shown in figure below. Refer to Figure
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: 1.6 pounds 0.73 kilograms

B

H

-Z-T//

REF

S

[1]

A

-Z-

M

L

R REF

-X-N

C

-X-

J

Notes:

[1]

Mounting holes are 6-32 UNC 2B, three
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).

13 for detailed mounting configuration dimensions.

K

-Z-

-X-U

P

F

[1]

E

D

Figure 13. Mounting configuration dimensions

1.028

A

5.787

B

4.000

C

3.750

D

0.125

E

1.750

F

1.122

H

4.000

J

0.250

K

1.638

L

0.181

M

.040

N

1.625

P

1.618

R

0.276

S

.015

T

.015

U

Dimension Table

Inches

max
max
± .010
± .010
± .010
± .010
± .020
± .010
± .010
± .010

± .020
± .040

max
max

26.10

147.00

101.60

95.25

44.45

28.50

101.60

41.60

41.28

41.10

Millimeters

max
max
± .25
± .25
± .25

3.18
± .25
± .50
± .25
± .25

6.35
± .25

4.60

1.02
± .50

± 1.02

7.00
max

0.38
max

0.38

38 Cheetah 15K.4 FC Product Manual, Rev. C

7.0 Defect and error management

The drive, as deli ve re d, c om pl ies w ith thi s pr odu ct ma nual. The read erro r ra tes an d s pe cif ied storage capaci­ties are not dependent upon use of defect management routines by the host (initiator).

Defect and error managem ent in the SCSI protocol involves the drive internal defect/error m anagement and
FC-AL system error con siderations (errors in communicatio ns between the initiator and the drive). Tools for
use in designing a defect/er ror manag ement pla n are brie fly outli ned in th is sectio n. Referen ces to othe r sec
tions are provided when necessary.

7.1 Drive internal defects/errors

During the initial drive format operation at the factor y, media defects are identified, tagged as being unusable ,
and their locations recorded on the dr ive 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 lo cation listed in the defects reallocat ion table. The “P” list is n ot altered after factory
formatting. Locations of defects found and reallocated duri ng error recovery p rocedures after drive shipment
are listed in the “G” list (d efects growth list) . The “P” and “G ” lists may be refe renced by the in itiator u sing the
Read Defect Data command.

Details of the SCSI commands s upported by the drive are described in the Fibre Channel Interface Manual.
Also, more informatio n on the drive Error Recovery philosophy is pres ented in the Fibre Channel Interface
Manual.

-

7.2 Drive error recovery procedures

When an error occurs during drive operation, the drive, if programmed to do so, performs error recovery proce­dures to attempt to recover the data. The error recovery procedures used depend on the options previously set
in the Error Recovery Par am ete rs mod e page. E rror r ecov er y and defect management may invol v e us ing se v
eral SCSI commands d escr ibed in the Fibr e Chann el Interfa ce Man ual. The d rive im ple ments selec table error
recovery time limits required in video applications.

The error recovery scheme supported by the drive provides a way to control the total error recovery time for the
entire command in addi tion to c ontr o ll ing the re co ve ry le ve l for a singl e LB A. T he total amount of time spent in
error recovery for a comm and c an be li mited using the Recovery Time Limit bytes in the E rror Rec ov ery mod e
page. The total amount of time spent in e rror recovery for a single LBA can be limited using the Re ad Retry
Count or Write Retry Count bytes in the Error Recovery mode page.

The drive firmware error rec overy algo rithms con sists of 11 levels for read recoveries and five leve ls for write.
Each level may consis t of multip le steps, where a step is define d as a recove ry function involv ing a si ngle re­read or re-write at temp t. Th e maximum level used by the drive in LBA rec ov ery i s dete rmin ed by the r ead an d
write retry counts.

-

Cheetah 15K.4 FC Product Manual, Rev. C 39

Table 3 equates the read and write retry count with the maximum poss ible recovery time for read and wr ite
recovery of individua l LBAs . The time s give n do not inc lude time taken to pe rform realloc ations . Realloc ations
are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the recov
ery time limit for the command has not yet been met. Time needed to perform reallocation is not counted
against the recovery time limit.

When the RC bit is on e, reall ocatio ns are d isabled even i f the AR RE or AWRE bits are one. The d rive wi ll 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.

-

40 Cheetah 15K.4 FC Product Manual, Rev. C

Table 3: Read and write retry count maximum recovery times [1]

Read retry
count

0 51.87 0 23.94
1 59.85 1 35.91
2 203.49 2 55.86
3 235.41 3 67.83
4 271.32 4 119.7
5 283.29 5 (default) 147.63
6 315.21
7 395.01
8 454.86
9 486.78
10 522.69
11 (default) 1,264.83

Maximum recovery time per LBA
(cumulative, msec)

Write retry
count

Maximum recovery time per LBA
(cumulative, msec)

[1] These values are subject to change.

Setting these ret ry counts to a value bel ow the default settin g could result in an increased un recovered
error rate which may exceed the value g iven in thi s product man ual. A s etting of zero (0) wil l result in th e
drive not performing error recovery.

For example, suppose th e Read/Write Recovery page has the RC bit set to 0, read retr y count set to 4,
and the recovery ti me li mit fiel d (Mode Se nse page 01, bytes 10 a nd 11) set to FF FF hex (m aximu m). A
four LBA Read command is al lo wed to take up to 271. 32 msec recovery time for each of the four LBAs in
the command. If the recovery time limit is set to 00 C8 hex (200 msec decimal) a four LBA read command
is allowed to take up to 200 m sec for all error recove ry within that command. T he use of the Recovery
Time Limit field allows finer g ranularity on control o f the time spent in err or recovery. The recovery time
limit only starts counting when the drive is executing error recovery and it restarts on each command .
Therefore, each command’s total recovery time is subject to the recovery time limit. Note: A recovery time
limit of 0 will use the drive’s default value of FF FF. Minimum recovery time limit is achieved by setting the
Recovery Time Limit field to 00 01.

7.3 FC-AL system errors

Information on the reporting of operational errors or faul ts across the interface is given in the Fibre Cha nnel
Interface Manual. The FCP Resp ons e retur ns info rm ati on to the ho st abo ut num erous ki nds of errors or fau lts.

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.

7.4 Background Media Scan

Background Media Scan (B GMS) is a self- initiat ed media scan. It performs sequentia l reads acros s the entire
pack of the media while the drive is idle. In RAID arrays, BGMS allows hot spare drives to be scanned for
defects prior to being put into service by the host system. On regular duty drives, if the host system makes use

Cheetah 15K.4 FC Product Manual, Rev. C 41

of the BGMS Log Page, it can avoid placing data in susp ect locations on the med ia. Unrecovered err or sites
found during BGMS will be logge d and recovered error sites will be logged or reallocated per ARRE/AWRE
settings.

With BGMS, the host system ca n consume less power and system overhea d by only checking BGMS sta tus/
results rather than tying up the bus and consuming power in the process of host-initiated media scanning activ
ity.

Since the background scan functions are only done during idl e periods, BGMS caus es a negligible impact to
system performanc e. Backgr ound me dia sc an will begi n after 500m s of idle time. O ther featur es that n ormally
use idle time to fu nction will function norma lly because BGMS functions for bursts of 800ms and th en sus
pends activity to allow other background functions to operate. Additionally , BGMS operates in segments of 400
block reads, checking for host commands upon completion of each of the block segments.

The BGMS function will compl ete any BGM S-initiate d error reco very prior to returning to ser vice host- initiate d
commands. Overhead associated with a return to host-servicing activity from BGMS only impacts the first com
mand that interrupted BGMS. This results in a typical delay of about 4 ms.

7.4.1 Media Pre-Scan

Media Pre-Scan is an optional feature that allows the drive to handle unrecovered media errors that would oth­erwise have been found by the host system during critic al data accesses early in the integrati on process at
customer sites. Thi s should reduce integration DP PM (defective parts per mi llion) by identi fying and repair ing
media errors that aros e during shipping and handling . Media Pre-Scan repla ces all host-initiated Write com
mands with Write-Verify commands when the drive is accessi ng areas of the media yet untouched by BG MS­initiated scanning activity.

-

-

-

-

The drive will attempt to run BGMS on the entire pack of the drive. This will result in increasingly large portions
of the drive having been accessed, provided there is adequate idle time to allow BGMS to run. During the Pre­Scan period, all Write c ommands that are in a reas not yet scanned by BG MS are converted to Write-Verify
commands. To expedite the scan of the ful l pack and the subsequ ently exit from the Pre-Scan per iod, BGMS
will begin immediately when the drive goes to idle during the Pre-Scan period, as opposed to waiting 500ms as
is done under non-Pre-Scan conditions.

42 Cheetah 15K.4 FC Product Manual, Rev. C

8.0 Installation

Cheetah 15K.4 FC disc driv e i ns tallation i s a plu g-and-play process. Ther e are no jum per s , sw itc he s, o r te rmi­nators 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 arbi
trated loop physical address (AL_PA). There are 125 AL_PAs available (see Table 25). If you set the AL_P A on
the backpanel to any value othe r than 0, the dev ice plugged into the backpanel’s SCA connec tor inherits this
AL_PA. In the event you don’t successfully assign unique hard addresses (and therefore have duplicate selec
tion 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 iss ues a u nique s oft-assign ed phy sical ad dress au to
matically.

Loop initialization i s the process used to verify or obtain an address . The loop initialization process is per ­formed 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 select ions in the connector prio r 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-le ve l format thi s drive . The dri ve is shippe d from th e facto ry low-lev el for matted i n
512-byte logical blocks. You need to reformat the drive only if you want to select a different logical block size.

-

-

-

8.1 Drive ID/option selection

All drive options are mad e th ro ugh the int er fac e co n nector (J 1) . Table provides the pin descriptions fo r the 40­pin Fibre Channel single connector (J1).

Cheetah 15K.4 FC Product Manual, Rev. C 43

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 c onnections (see Figu re
functions.

J6

Figure 14. Physical interface

15). See Secti ons 9.5.7, 9.5.8, and 9.5.9 for description s of LED

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. T ie the minus side of an external high-effi-

ciency 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

44 Cheetah 15K.4 FC Product Manual, Rev. C

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 m ounted in any orientation. All dr ive performance characterizati ons, however, have been
done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, which are the two pre
ferred mounting orientations.

8.4 Cooling

The host enclosure must di ss ipate he at fr om the drive . You should confirm that the host enclo sure is designed
to ensure that the drive operates within the temperature measurement guidelines described in Section
some cases, forced airf low may be required to keep tem peratures at or below the tempe ratures specified in
Section

6.4.1.

If forced air is nece ssary, possible air-flow patterns ar e shown in Fi gure 16. The air-flow patterns are create d
by fans either forcing or dra wing air as show n in the illustr ations. Conduction, c onvection, or other forced air­flow patterns are acceptable as long as the temperature measurement guidelines of Section

6.4.1 are met.

6.4.1. In

-

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)

Figure 16. Air flow

Above unit

Under unit

Above unit

Under unit

Cheetah 15K.4 FC Product Manual, Rev. C 45

8.5 Drive mounting

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

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

K x X = F < 15lb = 67N

where K is the mounting s urface stiffness (units in lb/i n or N/mm) and X is the out-of-plane surfac e distortion
(units in inches or millimeters ). The out-of- plane dis tortion (X) is determine d by defin ing a plan e with thre e of
the four mounting points fi xed and evaluating the out-of-plane de flection of the fo urth mounting point w hen a
known force (F) is applied to the fourth point.

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

Technology 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 mecha nical
structure capable of moun ting the drive so that i t can meet the shock and vibration specificati ons
listed in this manual.

8.6 Grounding

Signal ground (PCB A) and HDA ground a re connected to gether in the driv e and cannot be separate d by the
user. The equipment in which the drive is mou nte d is co nne cte d dire ct ly to the HD A an d P CBA with no el ec tri
cally isolating s hock mounts. If it is desired for the sy stem chassis to not be connected t o the HDA/PCBA
ground, the systems in tegrator or user must provide a noncond uctive (elec trically is olating) m ethod of mou nt
ing the drive in the host equipment.

-

-

Increased radiated em issions may res ult if you do not provid e the maximum surf ace area ground conn ection
between system ground and drive ground. This is the system designer’s and integrator’s responsibility.

46 Cheetah 15K.4 FC Product Manual, Rev. C

9.0 Interface requirements

This section partially describes the interface requirements as implemented on Cheetah 15K.4 FC drives. Addi­tional information is provided in the Fibre Channel Interface Manual (part number 77767496).

9.1 FC-AL features

This section lists the Fibre Channel-specific features supported by Cheetah 15K.4 FC drives.

9.1.1 Fibre Channel link service frames

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

Table 4: Link services supported

Type of fra me Link service

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

Basic_Reject (BA_R J T)

Extended link service frames N_Port Log in (PLOGI)

Fabric Login (FLOGI)
Logout (LOGO)
Process Login (PRLI)
Process Logout (PRLO)
Read Link Status (RLS)

Fabric Address Notification (FAN)
Port Discovery (PDISC)
Address Di scovery (ADISC )

Third-party Process Logout (TRPLO)

Extended link service reply frames Accept (ACC)

Fibre Channel Services Register FC-4 Types (RFT_ID)

Link Service Reject (LS_RJT)

Cheetah 15K.4 FC Product Manual, Rev. C 47

9.1.2 Fibre Channel task management functions

Table 5 lists the Fibre Channel SC SI Fibre Channel Protocol (FC S CS I F CP ) task m ana gem ent functions sup­ported.

Table 5: Fibre Channel SCSI FCP task management functions

Ta sk nam e Supported

Terminate task No
Clear ACA Yes
Target reset Yes
Clear task s et 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

48 Cheetah 15K.4 FC Product Manual, Rev. C

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 XX XX XX XX PN PN PN PN PN PN PN PN NN NN NN NN
32-35 NN NN NN NN
36-47 XX XX XX XX XX XX XX XX XX XX XX XX Class 1
48-51 XX XX XX XX
52-63 XX XX XX XX XX XX XX XX XX XX XX XX Class 2
64-67 XX XX XX XX
68-79 SO SO IC IC XX XX FS FS XX CS XX XX Class 3
80-83 OS OS XX XX
84-95 XX XX XX XX XX XX XX XX XX XX XX XX Reserved
96-99 XX XX XX XX
100-111 XX XX XX XX XX XX XX XX XX XX XX XX Vendor
112-115 XX XX XX XX Version

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

MSB Continuously increasing offset Must = 1

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

during a Port DISCovery, and implicit logout occurs and the initiator returns a LS_RJT.
NN Node name. The node name is not checked or saved by the drive.
SO Service options Class 3 only.

MSB Class valid Must = 1

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

IC 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.4 FC Product Manual, Rev. C 49

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 00 00 01 F4 2P 00 CC CC CC UI UI UI 20 00 CC CC
32-35 CC UI UI UI
36-47 00 00 00 00 00 00 00 00 00 00 00 00 Class 1
48-51 00 00 00 00
52-63 00 00 00 00 00 00 00 00 00 00 00 00 Class 2
64-67 00 00 00 00
68-79 80 00 00 00 00 00 FS FS 00 FF 00 00 Class 3
80-83 00 01 00 00
84-95 00 00 00 00 00 00 00 00 00 00 00 00 Reserved
96-99 00 00 00 00
100-111 00 00 00 00 00 00 00 00 00 00 00 00 Vendor ­112-115 00 00 00 00 Version

CC Bytes (22, 23 and 24) and (30, 31 and 32) are currently factory set to 00 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 00 00 00 22

XX Indicates fields that are not used.

50 Cheetah 15K.4 FC Product Manual, Rev. C

9.1.7 Fibre Channel Process Login Accept

Table 10 lists Cheetah 15K.4 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 00 00 00 12

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 00 00 02 F4 2P 00 CC CC CC UI UI UI 02 00 CC CC
32-35 CC UI UI UI
36-47 00 00 00 00 00 00 00 00 00 00 00 00 Class 1
48-51 00 00 00 00
52-63 00 00 00 00 00 00 00 00 00 00 00 00 Class 2
64-67 00 00 00 00
68-79 80 00 00 00 00 00 08 40 00 00 00 00 Class 3
80-83 00 00 00 00
84-95 00 00 00 00 00 00 00 00 00 00 00 00 Reserved
96-99 00 00 00 00
100-111 00 00 00 00 00 00 00 00 00 00 00 00 Vendor ­112-115 00 00 00 00 Version

CC Bytes (22, 23 and 24) and (30, 31 and 32) are currently factory set to 00 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.4 FC Product Manual, Rev. C 51

9.1.9 Fibre Channel fabric accept login

Table 12 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_ PN PN PN PN PN PN PN PN NN NN NN NN
32-35 NN NN NN NN
36-47 XX XX XX XX XX XX XX XX XX XX XX XX Class 1
48-51 XX XX XX XX
52-63 XX XX XX XX XX XX XX XX XX XX XX XX Class 2
64-67 XX XX XX XX
68-79 SO SO xx xx XX XX FS FS XX xx XX XX Class 3
80-83 OS OS XX XX
84-95 XX XX XX XX XX XX XX XX XX XX XX XX Reserved
96-99 XX XX XX XX
100-111 XX XX XX XX XX XX XX XX XX XX XX XX Vendor ­112-115 XX XX XX XX Version

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

MSB Continuously increasing offset x

Random relative offset x
Valid version level x
N_Port/F_Port Must = 1, F_Port
Alternate credit model Mu st = 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 Mu st = 1

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

52 Cheetah 15K.4 FC Product Manual, Rev. C

9.1.10 Fibre Channel Arbitrated Loop options

Table 13 lists the FC-AL options supported by Cheetah 15K.4 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.4 FC drives have two indep endent F C-AL ports. Thes e ports may be con nected on ind ependen t
loops or on the same loop. Port A and Port B may be connected in any order or combination.

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

• If both ports are conne cte d i n t he s am e l oop an d h ar d a ddres si ng is u sed, at least one port will a ttem pt tak­ing a soft address to prevent an address conflict.

Note. When a Cheetah 15K.4 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 requir em ents in t heir p roduc t ma nu­als.

Subject to buffer availability, the Cheetah 15K.4 FC drives support:

• Concurrent port transf ers—The dr ive supports rece iving transfer s on both ports at the same tim e when the
ports are on independent loops.

• Full duplex—The driv e supports sending FCP_Data, FCP _RSP, FCP _XFR_RDY and ELS transfers while
receiving frames on both ports.

Cheetah 15K.4 FC Product Manual, Rev. C 53

9.3 SCSI commands supported

Table 14 lists the SCSI commands supported by Cheetah 15K.4 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)

54 Cheetah 15K.4 FC Product Manual, Rev. C

Table 14: Supported commands (continued)

Command code Supported [4] Command name

Y Verify error recovery page (07h)
Y Caching parameters page (08h)
Y Control mode page (0Ah)
Y Fibre Channel Interface Control page (19h)
Y P ower control page (1Ah)

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

Y Supported diagnostics pages

Y Translate page

Y Enclosure services page
1Dh Y Send diagnostics page

Y Supported diagnostics pages

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

Y D isable page out

Y Force unit access

N Relative address
2Ah Y Write extended

Y D isable page out

Y Force unit access

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

Y D isable page out

Y Byte check

N Relative address
2Fh Y Verify

Y D isable page out

Y Byte check

N Relative address
30h N Search data high
31h N Search data equal
32h N Search data low

Cheetah 15K.4 FC Product Manual, Rev. C 55

Table 14: Supported commands (continued)

Command code Supported [4] Command name

33h N Set limits
34h N Prefetch
35h Y Synchronize cache
36h N Lock-unlock-cache
37h Y Read defect data
39h N Compare
3Ah N Copy and verify
3Bh Y Write buffer

Y Write combined header and data mode (0)
Y Write data mode (2)
N Download microcode mode (4)
Y Download microcode and save modes (5)
N Download microcode with offsets mode (6)
Y Download microcode with offsets and save mode (7)
Y Firmware dow nload option [2]

3Ch Y Read buffer

Y Read combined header and data mode (0)
Y Read data mode (2)

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

N PBdata

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

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)

56 Cheetah 15K.4 FC Product Manual, Rev. C

Table 14: Supported commands (continued)

Command code Supported [4] Command name

N Application Client page (0Fh)
Y Self Test Results page (10h)
Y Cache Statistics Counter page (37h)

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

Y 3rd party reserve

N Extent reservation
57h Y R eleased (10)
58-59h N Not used
5Ah Y Mode Sense (1 0) [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
A0h Y Report LUNS
C0-DFh N Not used
EO-FFh N Not used

[1] Cheetah 15K.4 FC drives can format to any multiple of four bytes per logical block in the range 512 to 704

bytes.

[2] Warning. Power lo ss d ur in g fl ash pr ogr am mi ng ca n res ul t i n fir mwa re c or rupti on . T hi s us ual ly m ak es 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.4 FC Product Manual, Rev. C 57

9.3.1 Inquiry data

Table 15 lists the Inquir y comma nd data that the driv e should return to the initiator pe r the form at given in th e
Fibre Channel Interface Manual.

Table 15: Cheetah 15K.4 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 [53 54 33 31 34 36 38 35 34 46 43]120 20 20 20 20 Product ID
32-47 R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00
48-63 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
64-79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80-95 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
96-111 00 43 6F 70 79 72 69 67 68 74 20 28 63 29 20 32* *Copyright
112-127 30* 30* 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 ST3146854FC.

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

ST373454FC 53 54 33 37 33 34 35 34 46 43

ST336754FC 53 54 33 33 36 37 35 34 46 43

9.3.2 Mode Sense data

The Mode Sense command pr ovide s a way for the driv e to report its operati ng paramete rs to the initi ator. The
drive maintains four sets of mode parameters:

1. Default values

Default values are har d-coded in the drive firmwa re stored in fl ash E-PROM (non volatile me mory) on the
drive’s PCB. These defa ult values can be changed o nly by downloadi ng a complete s et of new firmw are
into the flash E -PROM. An i nitiat or c an requ est an d re ceiv e fro m the drive a list of default val ues and use
those in a Mode Select co mmand to set up new current and s aved values , where the val ues are chan ge
able.

2. Saved values

Saved values are st ored on the dr ive’s media us ing a Mode Selec t comman d. Only parameter va lue s 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 applie d to the dri ve, it takes s aved va lues fro m the media and store s them as current va l­ues in volatile memo ry. It is not possible to change the current values (or the saved val ues) 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 sa ved value s, the req uired unique saved value s are sto red into the saved va l­ues storage location on the medi a pr i or to sh ip ping the drive. Some drives m ay have uni qu e fir m war e wit h
unique default values also.

-

58 Cheetah 15K.4 FC Product Manual, Rev. C

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

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

can be used to change the values id entified a s changea ble va lues. Ori ginally, 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) i ndicates the value can be
changed. A zero (0 ) indicates t he value is not changeab le. For exam ple, in Table
81, in the row entitled “CHG.” These are hex numbers representing the ch angeab le 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 al so that bytes 06, 07, 09, 10, and 11 are not changeable, bec ause 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 fie ld, it mea ns that bit is no t changeable. Since all of the bits in byte 02 are ones, al l of
these bi ts 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 ).

16, refer to Mode page

Definitions:
SAV = Current saved value.

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

Cheetah 15K.4 FC Product Manual, Rev. C 59

Table 16: Mode Sense data saved, default and changeable values for ST3146854FC drives

MODE SENSE (10 BYTE) HEADER DATA
00 ae 00 10 00 00 00 08 11 17 73 30 00 00 02 00

MODE SENSE PAGES DATA
SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff
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

SAV 82 0e 80 80 00 00 00 00 00 00 05 bc 00 00 00 00
DEF 82 0e 80 80 00 00 00 00 00 00 05 bc 00 00 00 00
CHG 82 0e ff ff 00 00 00 00 00 00 ff ff 00 00 00 00

SAV 83 16 56 20 00 00 00 30 00 00 02 c2 02 00 00 01 00 aa 00 91 40 00 00 00
DEF 83 16 56 20 00 00 00 30 00 00 02 c2 02 00 00 01 00 aa 00 91 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

SAV 84 16 00 c6 88 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00
DEF 84 16 00 c6 88 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

SAV 87 0a 00 0b ff 00 00 00 00 00 ff ff
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

SAV 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00
DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 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

SAV 8a 0a 02 00 00 00 00 00 00 00 08 4d
DEF 8a 0a 02 00 00 00 00 00 00 00 08 4d
CHG 8a 0a 03 f1 00 00 00 00 00 00 00 00

SAV 99 06 00 00 00 00 00 00
DEF 99 06 00 00 00 00 00 00
CHG 99 06 00 ff 00 00 00 00

SAV 9a 0a 00 02 00 00 00 05 00 00 00 04
DEF 9a 0a 00 02 00 00 00 05 00 00 00 04
CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01
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

SAV 80 06 00 00 0f 00 00 00
DEF 80 06 00 00 0f 00 00 00
CHG 80 06 b7 40 0f 00 00 00

READ CAPACITY DATA
11 17 73 2f 00 00 02 00

60 Cheetah 15K.4 FC Product Manual, Rev. C

Table 17: Mode Sense data default and changeable values for ST373454FC drives

MODE SENSE (10 BYTE) HEADER DATA
00 ae 00 10 00 00 00 08 08 8b b9 98 00 00 02 00

MODE SENSE PAGES DATA
SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff
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

SAV 82 0e 80 80 00 00 00 00 00 00 01 3c 00 00 00 00
DEF 82 0e 80 80 00 00 00 00 00 00 01 3c 00 00 00 00
CHG 82 0e ff ff 00 00 00 00 00 00 ff ff 00 00 00 00

SAV 83 16 2b 10 00 00 00 18 00 00 02 c2 02 00 00 01 00 aa 00 91 40 00 00 00
DEF 83 16 2b 10 00 00 00 18 00 00 02 c2 02 00 00 01 00 aa 00 91 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

SAV 84 16 00 c6 88 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00
DEF 84 16 00 c6 88 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

SAV 87 0a 00 0b ff 00 00 00 00 00 ff ff
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

SAV 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00
DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 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

SAV 8a 0a 02 00 00 00 00 00 00 00 04 7e
DEF 8a 0a 02 00 00 00 00 00 00 00 04 7e
CHG 8a 0a 03 f1 00 00 00 00 00 00 00 00

SAV 99 06 00 00 00 00 00 00
DEF 99 06 00 00 00 00 00 00
CHG 99 06 00 ff 00 00 00 00

SAV 9a 0a 00 02 00 00 00 05 00 00 00 04
DEF 9a 0a 00 02 00 00 00 05 00 00 00 04
CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01
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

SAV 80 06 00 00 0f 00 00 00
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

Cheetah 15K.4 FC Product Manual, Rev. C 61

Table 18: Mode Sense data default and changeable values for ST336754FC drives

MODE SENSE (10 BYTE) HEADER DATA
00 ae 00 10 00 00 00 08 04 45 dc cc 00 00 02 00

MODE SENSE PAGES DATA
SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff
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

SAV 82 0e 80 80 00 00 00 00 00 00 01 3c 00 00 00 00
DEF 82 0e 80 80 00 00 00 00 00 00 01 3c 00 00 00 00
CHG 82 0e ff ff 00 00 00 00 00 00 ff ff 00 00 00 00

SAV 83 16 15 88 00 00 00 0c 00 00 02 c2 02 00 00 01 00 f0 00 91 40 00 00 00
DEF 83 16 15 88 00 00 00 0c 00 00 02 c2 02 00 00 01 00 f0 00 91 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

SAV 84 16 00 c6 88 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00
DEF 84 16 00 c6 88 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

SAV 87 0a 00 0b ff 00 00 00 00 00 ff ff
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

SAV 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00
DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 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

SAV 8a 0a 02 00 00 00 00 00 00 00 02 5b
DEF 8a 0a 02 00 00 00 00 00 00 00 02 5b
CHG 8a 0a 03 f1 00 00 00 00 00 00 00 00

SAV 99 06 00 00 00 00 00 00
DEF 99 06 00 00 00 00 00 00
CHG 99 06 00 ff 00 00 00 00

SAV 9a 0a 00 02 00 00 00 05 00 00 00 04
DEF 9a 0a 00 02 00 00 00 05 00 00 00 04
CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01
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

SAV 80 06 00 00 0f 00 00 00
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

62 Cheetah 15K.4 FC Product Manual, Rev. C

9.4 Miscellaneous operating features and conditions

Table 19 lists various features and con dition s. A “Y ” in the sup port co lumn i ndicates the fea ture or co nditio n 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

Y

N

N

Y

N

Y

Y

Y

Y

N

Y

Table 20: Miscellaneous status

FC-AL selective reset

Automatic contingen t alle gia nc e

Asynchronous event notification

Synchronized (locked) spindle operation

Segmented caching

Zero latency read

Queue tagging (up to 128 queue tags supported)

Deferred error handling

Parameter rounding (controlled by Round bit in Mode Select page 0)

Reporting actual retry count in Extended Sense bytes 15, 16, and 17

Adaptive caching

SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes

Supported Status

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Good

Check condition

Condition met/good

Busy

Intermediate/good

Intermediate/condition met/good

Reservation conflict

Task set full

ACA active

ACA active, faulted initiator

Cheetah 15K.4 FC Product Manual, Rev. C 63

9.5 FC-AL physical interface

Figure 17 shows the location o f the J1 Fibre Channel singl e c onn ec tio n attach men t (FC-SCA) and the J6 con­nector. Figure 19 provides the dimensions of the FC-SCA conn ec tor. Figure 20 provides the dimensions of the
J6 connector.

Details of the physical, el ectrical, and logica l characteristics ar e provided within this section. The operati onal
aspects of Seagate’s Fibre Channel drives are provided in the Fibre Channel Interface Manual..

J6

Figure 17. Physical interface

9.5.1 Physical characteristics

This section defines physical interface connector.

9.5.1.1 Physical description

FIbre Channel drives may be connected in a loop together or with other compatible FC- AL devices. A m axi­mum of 127 devices may have ad dresses; howev er, one of the addresses is reserved for a fabric port switch
device. This means 126 addresses are available for FC-AL de vices. 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 va lid
addresses.

Port bypass circuits (PB Cs) all ow devices to be ins erted into unpopula ted locati ons or removed fr om the loo p
with loop operation rec overy after a brief interru ption. These PBCs are l ocated 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 N–1

Drive

MUX

Select

SerialInSerial

Drive N

Out

To Next

Drive

Port Bypass

Circuit N+1

Drive N+1

Figure 18. Port bypass circuit physical interconnect

64 Cheetah 15K.4 FC Product Manual, Rev. C

9.5.2 Connector requirements

P

P

s

(

Table 21: Recommended mating SCA part numbers

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)

in 20

in 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

.05 in

(1.27 mm)

typ.

.025 in (0.635 mm)

Contact (typ.)

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)

0.106 ± .010 in

(2.70 ± 0.25 mm)

2 places

min.

0.394 ± .004 in

(10.0 ± 0.10 mm)

0.039 in

(0.75 mm)

0.051 ± .006 in

(1.30 ± 0.16 mm)

min.

0.024 in

(0.60 mm)

0.079 ± .010 in
(2.00 ± .25 mm)

0.060 ± .010 in

(1.52 ± 0.25 mm)

min.

(initial point

of contact)

2 place

Figure 19. FC-AL SCA device connector dimensions

.787

(19.99 mm)

.079 (2 mm)

J6

.079

2 mm)

.708

(17.983 mm)

Figure 20. J6 connector dimensions

Cheetah 15K.4 FC Product Manual, Rev. C 65

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 Serv ices 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 22: 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
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[2TTL input
20* 5 Volts 40 5 Volts charge

[1]

[2]
[2]

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

*Short pins in mating backpanel connector.
[1] This pin ma y be connected to ex ternal logic to dete ct the presence of the dri ve. The drive connec ts 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.

66 Cheetah 15K.4 FC Product Manual, Rev. C

9.5.5 FC-AL transmitters and receivers

r

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

Receive

RY

9.5.6 Power

Power is supplied thr ough the FC-SCA with support for +5 volts and +12 volts. All of the v oltage 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. T he supp ly curr ent and r eturn c ur rent mu st be dis trib uted as ev en ly as po s
sible 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 th e connector to enab le 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 curre nt-limiting resistor. The LED and the curre nt-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 23.

Table 23: 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

Cheetah 15K.4 FC Product Manual, Rev. C 67

Table 23: Active LED Out conditions

Normal command activity LED status

Spun up and activi ty (command executing) Off
Spinning up or down Blinks steadily (50% on and 50% off)
Format in progress, each cylinder change Toggles on/off

The Active LED Out signal is designed to pull down the cathode of a n LED. The anode is attached to the
proper +5 volt sup pl y th rough an appropriate current lim iting re si s tor. The LED and the c urr ent li mit ing res is tor
are external to the drive.

9.5.9 Enable port bypass signals

The – Enable Byp a ss Po rt A (– EN BYP Po rt A ) a nd – E n able B yp a ss Port B (– EN B YP Port B ) si gna ls con t rol
the port bypass circuits (PBC) located ex terna l to the di sc dr iv e. The PB C all ows a loop to remain func tio nal in
the event of a driv e fa il ure o r remo val . W he n th es e s i gnals ar e ac tive, low, the PBC b ypasses th e d riv e o n th e
associated port . When an Enable Bypass signal is active, the cor responding Po rt Bypass LED signal in con
nector J1 is driven low by the disc drive. A pull down resistor, 1K, located with the PB C should be used to
insure the bypass is enabled if the disc drive is not installed.

The Enable Bypass signal is active under failing condition s 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 acc ording to the Start_1 and Start_2 signals described in Table 24. The state of
these signals can be wired into the backplane socket or driven by logic on the backplane.

Table 24: 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 o f 12 seco nds ti mes th e mod ulo 8 v alue o f

4 High High The drive will not spin up.

the numeric SEL ID of the drive from DC power on.

9.5.11 SEL_6 through SEL_0 ID lines

The SEL_6 through SEL_0 ID lines deter mine driv e addre ss, and, optionally, for an Enclosure Se rvices Inter­face. When the Parallel ESI line is high, the enclosure backpanel must provide address information on the SEL
line. Refer to table

25 for a mapping of SEL to FC- AL physical addresses ( AL_PA). You can think of the SEL

68 Cheetah 15K.4 FC Product Manual, Rev. C

lines as the equivalent of a bac kpanel logi c plug. The dri ves does not p rovide pull up resist ors on these li nes.
The backpanel is requi r ed to p rovi de hig h a nd low inputs to the SEL_ID lines per th e s pe ci fications in table
on page 71.

Note. Table 25 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 vali d AL_PA; however, this value signals the drive that
physical addresses ar e not being assigned using the SEL li nes and that a “soft” address will be
determined by FC-AL loop initialization.

When the Parallel ESI line is low, the enclosure backpanel logic swit che s to ESI mode if sup porte d. There ar e
two modes of ESI , seven bits of enclosure status an d a bidirectional mode. E SI support and the mode are
determined by the drive using a discovery process. Refer to the Fibre Channel Interface M anu al for a descrip
tion of ESI operation.

9.5.11.1 Parallel Enclosure Services Interface (ESI)

The parallel ESI line is a n output from the drive. This line prov ides the enclosure with an indication of the
present function of the S EL lines. A h igh level , the default state, indicat es the drive requires a ddress info rma
tion 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.

27

-

-

Cheetah 15K.4 FC Product Manual, Rev. C 69

Table 25: Arbitrated loop physical address (AL_PA) values

AL_PA
(hex)

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

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

AL_PA
(hex)

SEL ID
(hex)

Setting
(dec)

70 Cheetah 15K.4 FC Product Manual, Rev. C

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 back panel does not connect to thes e lines,
the drive has 10K o hm pull u p resistors that defaul t the devi ce cont rol code to 7 (1.0625 GHz). Table lists the
supported codes.

Table 26: 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 ele ctr ica l s ignal cha ra cteri s tics of the d ri ve’s inpu t and outp ut s ign als . S ee Table 22
on page 66 for signal type and signal name information.

9.6.1 TTL input characteristics

Table 27 provides the TTL characteristics.

Table 27: TTL characteristics

State Voltage Current

Input high 1.9 < VIH < 5.5V IIH = ±500nA max.
Input low -0.5V < VIL < 0.9V IOL = ±500nA max.
Output high (-EN Bypass A, B) 2.4 < V
Output low (-EN Bypass A, B) VOL < 0.5V IOL < 3mA
Output high (-Parallel ESI) 2.4 < V

VOH > 0.9V
Output low (-Parallel ESI) 0 < VOL < .45V IOL < 2.4mA
Output high (all other outputs) 2.4 < V

VOH > 0.9V
Output low (all other outputs) 0 < VOL < .45V IOL < 1.6mA

< 5.25V IOH < -3mA

OH

< 0.9 V

OH

< 0.9 V

OH

CC

CC

CC

CC

IOH < -2.4mA
IOH < -500µA

IOH < -1.6mA
IOH < -500µA

Cheetah 15K.4 FC Product Manual, Rev. C 71

9.6.2 LED driver signals

Fault and Active LED signals are located in the F C-SCA connector (J1) and through the indicator connector
(J6). See Table

Table 28: LED drive signal

State Current drive available Output volta ge

LED off, high 0 < IOH < 100µA
LED on, low IOL < -30 mA 0 < VOL < 0.8V

28 for the output characteristics of the LED drive signals.

9.6.3 Differential PECL output

The serial PECL output signal voltage characteristics are provided in Table 29. The outputs are not AC coupled
in order to deliver m aximum sig nal withou t rise and f all time degr adation. You must AC couple the receiver to
isolate potentially different DC characteristics of the outputs and the receiver.

Table 29: 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 30.

Table 30: Differential PECL input characteristics

Description Parameter Notes

Serial input voltage swing 200 < Vin < 1.300 mV AC coupled

72 Cheetah 15K.4 FC Product Manual, Rev. C

Figure 23 provides the data valid eye diagram for typica l and minimum requirements to recover data at the

m

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
Minimu

Cheetah 15K.4 FC Product Manual, Rev. C 73

74 Cheetah 15K.4 FC Product Manual, Rev. C

10.0 Seagate Technology support services

Online services

Internet

www.seagate.com for informatio n about Seagate products and servic es. Worldwide support is availab le 24

hours daily by e-mail for your questions.

Presales Support: www.seagate.com/support/email/email_presales.html or [e-mail]
Technical Support: www.seagate.com/support/email/email_disc_support.html or [e-mail]

mySeagate

my.seagate.com is the industry’s first Web portal desi gned specifically for OEMs and distri butors. It provides
self-service a ccess to cr itical app lications, personaliz ed content and the tool s that allo w our partner s to man
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reseller.seagate.com

reseller.seagate.com supports Seag ate resellers with produc t information, program benefi ts and sales tools.
You may register for custom ized communications that are n ot available on the web. These com munications
contain product launc h, EOL, pr icing, promoti ons and oth er channel- related infor mation. To learn more about
the benefits or to register, go to

Automated phone services

reseller.seagate.com, any time, from anywhere in the world.

-

SeaFONE® (1-800-SEAGATE) is the Seagate toll-free number (1-800-732-4283) to access our automated
directory assistance for Seagate Service Center support options. International callers can reach this service by
dialing [phone].

Seagate Service Centers

Presales Support

Our Presales Suppo rt staff can help you deter mine which Seagate products are best suited for your specific
application or computer system, as well as drive availability and compatibility.

Technical Support

If you need help installing your dr ive, consult your system's docume ntation or contact the deal er 's supp or t ser­vices department for assista nce specific to your sy stem. Seagate techn ical support is also av ailable to assist
you online at
tion and your drive’s “ST” model number available.

SeaTDD™ ([phone]) is a telecommunica tions devi ce fo r the deaf (TD D). You can send question s or
comments 24 hours d aily and e xcha nge m essag es wi th a technic al s upport speci alist during nor mal b usine ss
hours for the call center in your region.

support.seagate.com or through one of our call centers. Have your system configuration informa-

Cheetah 15K.4 FC Product Manual, Rev. C 75

Customer Service Operations

Warranty Service

Seagate offers worldwide customer supp ort for Seagate drives. Seagate dis tributors, OEMs and other direct
customers should contact their Seagate Customer Service Operations (CSO) representative for warranty­related issues. Resell ers or end users of drive products should contact their plac e of purchase or one of th e
Seagate CSO warranty center s for assis tance. Have your drive’s “ST” mod el number an d serial nu mber avai l
able.

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representative, call 1-800-475-0143. Additional information, including an online request form and data loss pre
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In some locations outside the US, you can contact an Authorized Service Center for service.

USA/Canada/Latin America support services

Seagate Service Centers

Presales Support

Call center Toll-free Direct dial FAX

Americas 1-877-271-3285

1

[phone]

1

[phone]

-

-

Technical Support

Call center Toll-free Direct dial FAX

Americas 1-800-SEAGATE

2

[phone]

2

[phone]

Customer Service Operations

Warranty Service

Call center Toll-free Direct dial FAX / E-mail

USA, Canada, Mexico and 1-800-468-3472
Latin America

Brazil
Jabil Industrial Do Brasil — [phone] [phone]
LTDA

4

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Call center Toll-free Direct dial FAX

USA, Canada, 1-800-475-01435 [phone]-475-0158
and Mexico [phone]

1

Hours of operation are 8:00 A.M. to 11:45 A.M. and 1:00 P.M. to 6:00 P.M., Monday through Friday (Central time).

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Hours of operation are 8:00 A.M. to 8:00 P.M., Monday through Friday (Central time).

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Hours of operation are 8:00 A.M. to 5:00 P.M., Monday through Friday (Central time).

4

Authorized Service Center

5

Hours of operation are 8:00 A.M. to 8:00 P.M., Monday through Friday, and 9:00 A.M. to 5:00 P.M., Saturday (Eastern time).

3

— [phone]

[e-mail]

76 Cheetah 15K.4 FC Product Manual, Rev. C

European support services

For presales and technic al support in Europe , dial the Seagate Serv ice Center toll-free nu mber for your spe­cific location. If yo ur location is not listed h ere, dial our presales and tech nical support call cen ter at +1-405­324-4714 from 8:00

A.M. to 11:45 A.M. and 1:00 P.M. to 5:00 P.M. (Central Europe time) Monday through Friday.

The presales and technical support call center is located in Oklahoma City, USA.
For European warranty service , dial the tol l-free numb er for you r specific locatio n. If your l ocation is not liste d

here, dial our Euro pean CS O warr an ty ce nter at [phone] fr om 8:3 0

A.M. to 5:00 P.M. (Central Europ e

time) Monday through Friday. The CSO warranty center is located in Amsterdam, The Netherlands.

Seagate Service Centers

Toll-free support numbers

Call center Presales and Technical Support Warranty Service

Austria — 00 800-47324289
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FAX services—All Europe (toll call)

Technical Support [phone]
Warranty Service [phone]

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For presales and tec hnical suppo rt in Africa and the Midd le East, dia l our presal es and technic al support c all
center at [phone] from 8:00
day through Friday. The presales and technical support call center is located in Oklahoma City, USA.

For warranty service in Africa and the Middle East, dial our Euro pean CSO warranty center at +31-20-316­7222 from 8:30

A.M. to 5:00 P.M. (Centr al Euro pe time ) Mond ay throu gh Frid ay, or send a FAX to +31-20-653-

3513. The CSO warranty center is located in Amsterdam, The Netherlands.

A.M. to 11:45 A.M. and 1:00 P.M. to 5:00 P.M. (Central Europe time) Mon-

Cheetah 15K.4 FC Product Manual, Rev. C 77

Asia/Pacific support services

For Asia/Pacific pr esales and technical s upport, dial the toll-fre e number for your specific location. The Asia /
Pacific toll-free numbers are available from 6:00

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

ern time) Monday through Friday, except as noted. If your location is not listed here, direct dial one of our tech­nical support locations.

Warranty service is availabl e from 9:00 A.M. to 6:00 P.M. April through O ctober, and 10:00 A.M. to 7:00 P.M.
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Call center Toll-free Direct dial FAX

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2, 4

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3, 4

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Taiwan (Mandarin)
Thailand 001-800-11-0032165 — —

1, 4

1, 4

800-810-9668 [phone] —

1, 4

001-800-0830-1730 — —
1-600-180-1104 — —

0034 800 400 554 — —
007 98 8521 7635 — —

00-800-0830-1730 — —

Customer Service Operations

Warranty Service

Call center Toll-free Direct dial FAX

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

4

India

1

Hours of operation are 8:30 A.M. to 5:30 P.M., Monday through Friday (Australian Western time).

2

Hours of operation are 9:00 A.M. to 6:00 P.M., Monday through Saturday.

3

Hours of operation are 9:30 A.M. to 6:30 P.M., Monday through Friday.

4

Authorized Service Center

— [phone] [phone]

78 Cheetah 15K.4 FC Product Manual, Rev. C

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Cheetah 15K.4 FC Product Manual, Rev. C 79

80 Cheetah 15K.4 FC Product Manual, Rev. C

Index

Numerics

12 volt

pins 67
3rd party reserve command 57
5 volt pins 67

BGMS 41, 42
buffer

data 8

space 13
busy status 63
bypass circuit 19
Byte check command 55
bytes per surface 11
bytes per track 11

A

Abort Sequence (ABTS) 47
abort task set function 48
AC coupling 67
AC power requirements 25
ACA active status 63
ACA active, faulted initiator status 63
Accept (ACC) 47
acoustics 37
active LED Out signal 67
Actual retry count bytes command 54
actuator

assembly design 7
adaptive caching 63
Address Discovery (ADISC) 47
addresses 64
air cleanliness 36
air flow 45

illustrated 45
Alternate credit model 49, 52
altitude 33
ambient 33
ANSI documents

fibre channel 5

SCSI 5
arbitrated loop physical address (AL_PA) 43
arbitration 43
asynchronous event notification 63
audible noise 3
auto negotiation of link rate 71
auto write and read reallocation

programmable 8
automatic contingent allegiance 63
average idle current 25
average rotational latency 11

B

Background Media Scan 41
backpanel 66
backplane 68
basic link service frames 47
Basic_Accept (B A_ACC) 47
Basic_Reject (BA_RJT) 47
BB 49, 52
BB-Credit 49, 52

C

cache operation 13
cache segments 13
Caching parameters page (08h) command 55
caching write data 14
Canadian Department of Communications 3
capacity

unformatted 11
capacity, drive, programmable 9
CC 50, 51
CF 49, 52
Change definition command 56
character sync 19
charge pins 67
check condition statu s 63
Class 3 parameters 49, 52
class B limit 3
Class valid 49, 52
clear ACA function 48
clear task set function 48
commands supported 54
Common features 49, 52
Company ID 50, 51
Compare command 56
Concurrent sequences 49
condensation 33
condition met/good status 63
connector

illustrated 65

requirements 65
continuous vibration 36
Continuously increasing offset 49, 52
control code values 71
Control mode page (0Ah) command 55
cooling 45
Copy and verify command 56
Copy command 54
CRC 19

error 18
CS 49
Current profiles 26
customer servic e 24

Cheetah 15K.4 FC Product Manual, Rev. C 81

D

data block size

modifing the 9

data buffer to/from disc media 12
data heads

read/write 11

data rate

internal 11
data transfer rate 12
data valid eye 73
Date code page command 54
DC power 66

requirements 25
defect and error management 39
deferred error handling 63
description 7
DEV_CTRL_CODE 71
Device Behavior page command 54
device control code values 71
Device Identification page command 54
device selection IDs 43
devices 43
differential PECL input 72
dimensions 38
Disable page out command 55
disc rotation speed 11
Disconnect/reconnect control (page 02h) command

54

Download microcode and save modes (5) 56
Download microcode mode (4) 56
Download microcode with offsets and s ave mode (7)

56

Download microcode with offsets mode (6) 56
drive 36
drive active LED connection 44
drive capacity

programmable 9
drive characteristics 11
drive fault LED connection 44
drive ID 43
drive ID/option select headers 43
drive mounting 38, 46
drive orientation 45
drive select 66
driver signals 72
drivers and receivers 8
dual port support 53

E

electrical

description of connector 66

signal characteristics 71

specifications 25
electromagnetic compatibility 3

electromagnetic susceptibility 37
EMI requirements 3
enable bypass

port A 68
port B 68
signal 68

state 19
Enclosure Services interface 66
Enclosure services page command 55
environmental

limits 32

requirements 17
environmental control 36
error

detection mechanisms, FC 19

management 39

rates 17
error correction code

96-bit Reed-Solomon 8
Error recovery page (01h) command 54
extended link service

frames 47

reply frames 47
Extended sense command 54
Extent reservation command 57

F

fabric 52
Fabric Address Notification (FAN) 47
Fabric Login (FLOGI) 47
FAN 52
fault LED out signal 67
FC-AL

document 5

interface 43, 66

options supported 53

physical interface 64

SCA device connector, illustrated 65

selective reset 63
FCC rules and regulations 3
FCP

for SCSI, document 5

response codes 48

task management functions 48
FC-PH document 5
features 8

interface 47
Fibre Channel documents 5
Fibre Channel Interface Control page (19h) 55
Fibre Channel Interface Manual 1, 3, 5
Fibre Channel Services 47
Field poin ter bytes command 54
firmware 8

corruption 57
Firmware download option command 56

82 Cheetah 15K.4 FC Product Manual, Rev. C

Firmware numbers page command 54
flawed sector reallocati on 8
FLOGI

received on Port A 51

received on Port B 51
Force unit access command 55
form factor 8
format 43
Format command execution time 12
Format page (03h) command 54
Format unit command 54
front panel 38
FS 49, 50, 52
function

complete, code 00 48

not supported, code 05 48

reject, code 04 48

G

Good status 63
gradient 33
ground shift noise 67
grounding 46

H

hard assigned arbitrated loop physical address

(AL_PA)

HDA 46
heads

read/write data 11
heat removal 45
host equipment 46
hot plugging the drive 19
humidity 33
humidity limits 32

43

I

IC 49
ID and configuration options 8
Implemented operating def. page command 54
Information exceptions control page (1Ch) command

55

Initiator control 49
Inquiry command 54
inquiry data 58
installation 43

guide 5
interface 43

commands supported 54

description 64

error rate 17

errors 18

illustrated 64

physical 64

requirements 47
interleave 8
intermediate/condition met/good status 63
intermediate/good status 63
Intermix 49, 52
internal data rate 11
internal defects/errors 39
internal drive characteristics 11

J

J1 connector 43
J6 connector 44, 45
Jumper settings page command 54
jumpers 43

L

latency

average rotational 11, 12
LBdata 56
LED driver signals 72
Link Service Reject (LS_RJT) 47
link services supported 47
Lock-unlock-cache command 56
Log select command 56
Log sense command 56
logic power 67
logical block address 13
logical block realloc ati on scheme 8
logical block size 8, 12
logical segments 13
Logout (LOGO) 47
loop 64, 68

disruption 19

initialization 43
loop position

FC-AL options 53
loop position report

FC-AL options 53
LS_RJT 49, 52
LSI circuitry 9

M

maintenance 17
maximum delayed motor start 25
maximum start current 25
mean time between failure (MTBF) 18
media description 8
Media Pre-Scan 42
miscellaneous feature support

Adaptive caching 63

Asynchronous event notification 63

Automatic contingent allegiance 63

Deferred error handling 63

FC-AL selective reset 63

Cheetah 15K.4 FC Product Manual, Rev. C 83

Parameter rounding 63
Queue tagging 63
Reporting actual retry count 63
Segmented caching 63
SMP = 1 in Mode Select command 63
Synchronized (locked) spindle operation 63
Zero latency read 63

miscellaneous sta tus suppor t

ACA active 63
ACA active, faulted initiator 63
Busy 63
Check condition 63
Condition met/good 63
Good 63
Intermediate/condition met/good 63
Intermediate/good 63
Reservation conflict 63
Task set full 63

miscorrected media data 17
Mode select

(10) command 57
command 54

Mode sense

(10) command 57
command 54
data, table 58, 60

monitoring state 19
motor start

controls 68
option 12

mounting 46

holes 46

orientations 45
mounting configuration 38
mounting configuration dimensions 38
MTBF 17, 18

defined 18

N

N_Port Login (PLOGI) 47

payload 49

payload values 50
NN 49, 52
Node Name 52
Node name 49
noise

audible 3
noise immunity 26
non-operating 33, 34, 36

temperature 33
non-operating vibration 36

O

office environment 36

old port state

FC-AL options 53

OPEN Full Duplex

FC-AL options 53

OPEN half duplex

FC-AL options 53
Open sequences per exchange 49
operating 33, 36
option configurations 43
option selection 66
options 10, 53
orientation 33
OS 49
out-of-plane distortion 46

P

P_LOGI

received on Port A 50

received on Port B 50
package size 34
package test specification 5
packaged 34
parameter rounding 63
pass-through state 19
PBC 64, 68
PBdata 56
PCBA 46
peak bits per inch 11
peak operating current 25
peak-to-peak measurements 26
PECL input 72
performance charact eris tic s

detailed 11

general 12
performance degradation 34
performance highligh ts 9
physical damage 36
physical interface 64

description 64
physical specifications 25
PI 50, 51
pin descriptions 66
PN 49, 52
port bypass circuit 19, 64, 68
port bypass LED connectio n 44
Port DISCovery 49
Port Discovery (PDISC) 47
port identifier field 50, 51
port login 49

accept 50
Port Name 52
Port name (initiator’s) 49
power 67

dissipation 30

requirements, AC 25

84 Cheetah 15K.4 FC Product Manual, Rev. C

requirements, DC 25

sequencing 26
Power control page (1Ah) command 55
power distribution 3
power failure warning 71
Prefetch command 56
prefetch/multi-seg men ted ca ch e contr ol 12
Pre-Scan 42
preventive maintenance 17
private loop

FC-AL options 53
Proc Assc 49
Process Accept (ACC) 51
Process Login (PRLI) 47, 50
Process Login Accept (ACC) payload 51
process login payload data 50
Process Logout (PRLO) 47
programmable drive capacity 9
public loop

FC-AL options 53
pull down resistor 68

Register FC-4 Types (RFT_ID) 47
Relative address command 55
relative humidity 33
Release command 54
Released (10) command 57
reliability 9

specifications 17
reliability and service 18
repair and return information 24
reporting actual retry count 63
Request sense command 54
reservation conflict status 63
Reserve command 54
Reserved (10) command 57
resonance 33
return information 24
Rezero unit command 54
Rigid disc drive geometry page

command 54
rotation speed 11
running disparity 19

Q

queue tagging 63

R

radio interference regulations 3
Random relative offset 49, 52
RCD bit 13
Read buffer command 56
Read capacity command 55
Read combined header and data mode (0) 56
Read command 54
Read data mode (2) 56
Read defect data command 56
Read descriptor mode (3) 56
read error rates 17
Read extended command 55
Read Link Status (RLS) 47
Read long command 56
read/write data heads 11
Reassign blocks command 54
Receive buffer field size 49, 52
receive buffer field size 50
Receive diagnostic results command 55
receive eye

diagram 73
receivers 67
recommended mounting 35
Recoverable Errors 17
recovered media data 17
reference

documents 5
Regenerate command 57

S

safety 3
SCA part numbers 65
SCSI interface

commands supported 54

Search data

equal command 55
high command 55
low command 55

Seek command 54
seek error

defined 18

rate 17
Seek extended command 55
seek performance characteristics 11
seek time

average typical 11

full stroke typical 11

single track typical 11
segmented caching 63
SEL ID 43

lines 68

standard feature 8
Self-Monitoring Analysis and Reporting Technology

9, 19
Send diagnostics page command 55
Sequential delivery 49, 52
Service Options 52
Service options 49
Set limits command 56
shielding 3
shipping 23
shipping container 33

Cheetah 15K.4 FC Product Manual, Rev. C 85

shock 33, 34

and vibration 33

shock mount 46
signal

characteristics 71

LED driver 72
single-unit shipping pack kit 10
SMART 9, 19
SMP = 1 in Mode Select command 63
SO 49, 52
spindle brake 8
Stacked connection req. 49, 52
standards 3
Start unit/stop unit command 55
start/stop time 12
support services 75
Supported diagnostics pages command 55
surface stiffness

allowable for non-flat surface 46
switches 43
Synchronize cache command 56
synchronized spind le

operation 63
system chassis 46

T

target reset function 48
task management functions 48

Abort task set 48

Clear ACA 48

Clear task set 48

Target reset 48

terminate task 48
task management response codes 48

Function complete 00 48

Function not supported 05 48

Function reject 04 48
task set full status 63
technical support servic es 75
temperature 32, 45

limits 32

non-operating 33

regulation 3

See also cooling
terminate task function 48
terminators 43
Test unit ready command 54
Third-party Proces s Logo ut (TRP LO ) 47
tracks per inch 11
tracks per surface 11
Translate page command 55
transmit eye diagram 72
transmitters 67
transporting the drive 23
TTL input characteristics 71

U

UI 50, 51
unformatted 9
unique identifier 50, 51
Unit attention page (00h) command 54
Unit serial number page command 54
Unrecoverable Errors 17
unrecovered media data 17

V

Valid version level 49, 52
Verify command 55
Verify error recovery page (07h) command 55
vibration 33, 36
Vital product data page command 54

W

warranty 23
word sync 19
Write and verify command 55
Write buffer command 56
Write combined header and data mode (0) 56
Write command 54
Write data mode (2) 56
Write extended command 55
Write long command 56
Write same command 56

X

XD read 57
XD write 57
XD write extended command 57
XID reassign 49
XP write 57

Z

zero latency read 63
zone bit recording (ZBR) 8

86 Cheetah 15K.4 FC Product Manual, Rev. C

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

Publication Number: 100220449, Rev. C, Printed in USA