seagate ST150176 Installation guide

Download

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Barracuda 50 Family:

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ST150176LW/LC

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Manual, Volume 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Barracuda 50 Family:

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ST150176LW/LC

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Manual, Volume 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Publication number: 83329471, Rev. C

June 1999

Seagate, Seagat e Technology, and the Seagate logo are registered trademar ks of Seagate Technology, Inc. Barracuda, SeaFAX , SeaFON E, SeaBOARD, and SeaTDD are either trademarks or registered trademarks of Seagate Technology, Inc. or one of its subsidiaries. All other trademar ks o r registered trademarks are the property of their respective owners.

Seagate reserves the right to chang e, without notice, product offerings or specifications. No part of this

publication may be reproduced in any for m without written per mission of Seagate Technology, Inc.

Revision status summary sheet

Revision Date Writer/Engineer Sheets Affected

Rev. A

Class A Release

Rev. B 05/15/99 L. Newman/D. Rus ch

Rev. C 06/11/99 L. Newman/D. Rusch 27, 29, and 30. ECO: DJD51093.

02/24/99 L. Newman/D. Rus ch 1/1, v thru viii, 1-82

Pages 7, 8, 9, 11, 25, 49 and 53. ECO: DJD51089

Notice. Product Manual 83329471 is Volume 1 of a two volume document with the SCSI Interface information in

the Volume 2 SCSI Interface P roduct Manual, par t number 7773 8479. If the SCSI Interface information is needed the Volume 2 Interface Manual should be ordered,

part number 77738479.

Barracuda 50 Product Manual, Rev. C v

Table of 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 Electromagn etic susceptibili ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Electromagn etic compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

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

3.1 Standard features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Media characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.4 Reliabili ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.5 Unformatted and formatted capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.6 Programmable drive capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.7 Factory installed accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.8 Options (factory installed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.9 Accessories (user installed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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

4.1 Internal drive characteristi cs (transparent to user) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2 SCSI performance characteristics (visible to user) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2.1 Access tim e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2.2 Format comm and ex ecution time (minute s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2.3 Generalized performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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

4.4 Prefetch/multi-segmented cache control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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

4.5.1 Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.5.2 Prefetch o peration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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

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

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

5.1.2 Read errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.3 Write erro rs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1.4 Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

5.2.1 Mean time between failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

5.2.3 Preve ntive maintenan ce . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

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

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

5.2.7 Hot plugging Barracuda 50 disc drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

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

6.0 Physical/electrical specific ations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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

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

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

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

6.2.3 Current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.3 Power dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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

vi Barracuda 50 Product Manual, Rev. C

6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

6.4.3 Effective altitude (sea level). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

6.4.4 Shock and vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

6.4.6 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

6.4.7 Electromagn etic susceptibili ty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

6.5 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

7.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

7.1 Drive inte rnal defects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

7.2 Drive erro r recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

7.3 SCSI systems errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

8.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8.1 Drive ID/option select header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

8.1.1 Notes for Figures 11, 12, and 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

8.1.2 Function description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

8.2 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

8.3 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

8.3.1 Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

8.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

8.5 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

9.0 Interface requiremen ts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.1 General description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.2 SCSI interface messages supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.3 SCSI interface commands suppo rted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

9.3.1 Inquiry Vital Product data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

9.3.2 Mode Sense data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

9.4 SCSI bus conditions and miscellaneous features support ed . . . . . . . . . . . . . . . . . . . . . . . . .49

9.5 Synchronous data trans fer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

9.5.1 Synch ronous data transfer periods supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

9.5.2 REQ/ACK offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

9.6 Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

9.6.1 DC cable and connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

9.6.2 SCSI interface physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

9.6.3 SCSI interface cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

9.6.4 Mating conn ectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

9.7 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

9.7.1 Multimode—SE or LVD alternative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

9.8 Terminator requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

9.9 Terminator power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

9.10 Disc drive SCSI timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

9.11 Drive activity LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

10.0 Seagate Te chnology support serv ices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Appendix A. Sense keys and additional sense codes supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Barracuda 50 Product Manual, Rev. C vii

List of Figures

Figure 1. Barracuda 50 family drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Barracuda 50 family drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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

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

Figure 5. DC current and power vs. input/output operations per second (SE mode) . . . . . . . . . . . . . . 22

Figure 6. DC current and power vs. input/output operations per second (LVD mode) . . . . . . . . . . . . . 22

Figure 7. Locations of PCB components listed in Table 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 8. Recommended mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 9. Mounting configuration dimensions for “LW” model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 10. Mounting configuration dimensions for “LC” model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 11. Barracuda 50 family drive ID select for models “LW” and “LC ” . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 12. Barracuda 50 family drive ID select header J5 for “LW” model (J5 Pins 1A - 12A) . . . . . . . . 35

Figure 13. Barracuda 50 family drive J2 option select header for “LC” and “LW” models. . . . . . . . . . . . 36

Figure 14. Air flow (suggested) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 15. Model “LW” drive physical interface (68 pin J1 SCSI I/O connector). . . . . . . . . . . . . . . . . . . 52

Figure 16. Model “LC” drive physical interface (80 pin J1 SCSI I/O connector) . . . . . . . . . . . . . . . . . . . 52

Figure 17. SCSI daisy chain interface cabling for “LW” model drives . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 18. Nonshielded 68 pin SCSI device connector used on “LW” models . . . . . . . . . . . . . . . . . . . . 56

Figure 19. Nonshielded 80 pin SCSI “SCA-2” connector, used on “WC” and “LC” models. . . . . . . . . . . 57

Figure 20. LVD output signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 21. Typical SE-LVD alternative tra nsmitter receiver circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Barracuda 50 Product Manual, Rev. C 1

1.0 Scope

This manual describes the Seagate Tec hnolo gy®, Inc. Barracuda 50™ disc dr ives. Barracuda 50 drives support the small computer system interface (SCSI) as described in the ANSI SCSI,

SCSI-2, and SCSI-3 (Fast-20 and Fast-40) interface specifications to the extent described in this manual. The SCSI Interface Product Manual (part number 77738479) describes general SCSI interface characteristics of this and other families of Seagate drives.

From this point on in this product manual the reference to Barracuda 5 0 models is referred to as “the drive” (unless references to individual models are necessary).

Figure 1.

Barracuda 50

family drive

Barracuda 50 Product Manual, Rev. C 3

2.0 Applicable standards and reference documentation

The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends upon its hos t equipment to provide adequate power and environment in order to ach ieve optimum performance and compliance with applicable industry a nd governmental regulations. Special attention must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regulation. In particular, the drive must be securely m ount ed in o rder to guarante e the s pecified pe rform ance c haracteristics. Mounting by bottom holes must meet the requirements of Section 8.4.

2.1 Standards

The Barracuda 50 family complies with Seagate s tandards as not ed i n th e appropr iate s ect ions of this Ma nual and the Seagate SCSI Interface Product Manual, part number 77738479 (Vol. 2).

The Barracuda 50 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 EN6 0950.

2.1.1 Electromagnetic compatibility

The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to use. As such the drive is supplied as a subassembly and is not subject to Subpar t B of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications.

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

2.1.2 Electromagnetic susceptibility

As a component assem bly, the drive is not required to me et any suscep tibility performance requi remen ts. It is the responsibility of those integrating the dri ve within their system s to perform t hose t ests req uired and design their system to ensure that equipment operating in the same system as the drive or external to the system does not adversely affect the performance of the drive. See Section 5.1.1 and Table 2, DC power requirements.

2.2 Electromagnetic compliance

Seagate uses an independen t laboratory to confirm complia nce to the directives/standard(s) for CE Marking and C-Tick Marking. The drive was tested in a representative system for typical applications. The selected system represents the most popular characteristics for test platforms. The system configurations include:

• 486, Pentium, and PowerPC microprocessors

• 3.5-inch floppy disc drive

• Keyboard

• Monitor/display

• Printer

• External modem

• Mouse

Although the test system with this Seagate m odel com plies to the directives/standard(s), we cannot guarantee that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compli ance and provide CE Marking and C-Tick Marking for t heir product.

Electromagnetic compliance for the European Union

If this model has the CE Marking it complies with the European Union requirements of the Electrom agnetic Compatibility Directive 89/336/EEC of 03 May 1989 as am ended by Directive 92/31/EEC of 28 A pri l 19 92 and Directive 93/68/EEC of 22 July 1993.

4 Barracuda 50 Product Manual, Rev. C

Australian C-Ti ck

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

2.3 Reference documents

Barracuda 50 Installation Guide Seagate P/N 83329472 SCSI Interface Product Manual Seagate P/N 77738479

ANSI small computer system interface (SCSI) document numbers:

X3.131-1994 SCSI-2 X3T10/855D SPI X3T10/1071D Fast-20 (also called “Ultra S CSI”) X3T10/1142D SPI-2

X3T10/1143D SFF-8046 Specification for 80-pin connector for SCSI disk drives SCA-2 EIA Specification ANSI/EIA Package Test Specification Seagate P/N 30190-001 (under 100 lb.) Package Test Specification Seagate P/N 30191-001 (over 100 lb.) Specification, Acoustic Test Requirements, and Procedures Seagate P/N 30553-001 In case of conflict between this document and any referenced document, this document takes precedence.

Barracuda 50 Product Manual, Rev. C 5

3.0 General description

Barracuda 50 drives combine magnetoresistive (MR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a SCSI-3 (Fast-20 and Fast-40) interface to provide high performance, high capacity dat a storage for a variety of systems including engineering workst ations, network servers, mainframes, and supercomputers.

Fast-20 and F ast-40 (also known as Ultra-1 SCSI and Ultra-2 SCSI, respectively) are negotiated transfer rates. These tran sfer rat es w ill o c c ur on ly if your ho s t adapter al so suppor t s thes e data transfer rat e s. Th is dr i ve a ls o operates at SCSI-1 and SC SI-2 data transfer rates for backward compatibility with non-Fast-20/Fast-40 capable SCSI host adapters.

Table 1 lists the features that differen tiate the various Barracuda 50 models.

Table 1: Drive model number vs. differentiating features

Model number

Number of heads I/O circuit type [1]

Number of I/O connector pins

Number of I/O data bus bits

ST150176LW 22 multimode (SE/LVD) 68 16 ST150176LC 22 multimode (SE/LVD) 80 16

[1] See Section 9.6 for details and definitions. The drive records and recovers data on 3.5-inch (86 mm) non-removeable discs. The drive supports the S mall Computer System Interface (SCSI) as described in the ANSI SCSI-2/SCSI -3

SPI-2 interface specifications to the extent described in this manual (volume 1), which defines the product performance characteristics of the Barracuda 50 family of drives, and the SCSI Interface Product Manual (volume

2), part number 777384 79, which describes the general inter face characteristics of this and other families of Seagate SCSI drives.

The drive’s interface supports multiple initiators, disconnect/reconnect, self-configuring host software, and automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets (logical block addressing is used).

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

Refer to Figure 2 for an exploded view of the drive. This exploded view is for information only—never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires special facilities. The drive contains no replaceable parts. Opening the HDA voids your warranty.

Barracuda 50 drives use a dedicated landing zone at th e inner m os t radius of the media to eliminate the possibility of destroying or degrading data by landing i n the data zone. The d rive automatically go es to t he landing zone when power is removed.

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

Barracuda 50 dr ives deco de track 0 locat ion data f rom the servo data embedded o n eac h su rface to eliminate mechanical transducer adjustments and related reliability concer n s.

A high-performance actuator ass embly with a low-inertia, balanced, patented, straight-arm des ign provides excellent performance with minimal power dissipation.

6 Barracuda 50 Product Manual, Rev. C

Figure 2. Barracuda 50 famil y drive

Barracuda 50 Product Manual, Rev. C 7

3.1 Standard features

The Barracuda 50 family has the following standard features:

• Integrated SCSI controller

• Multimode SCSI single-ended or low voltage differential drivers and receivers

• 16 bit I/O data bus

• Asynchronous and synchronous data transfer protocol

• Firmware downloadable via SCSI interface

• Selectable sector sizes from 512 to 2,048 bytes/sector in multiples of 4 bytes/sector

• Programmable drive capacity

• Programmable sector reallocation scheme

• Flawed sector reallocation at format time

• Programmable auto write and read reallocation

• Reallocation of defects on command (post format)

• Enhanced ECC correction capability up to 185 bits

• Sealed head and disc assembly

• No preventative mai ntenanc e or adjustment required

• Dedicated laser textured head landing zone

• Embedded servo data rather than a separate servo data surface

• Self diagnostics performed when power is applied to the drive

• 1:1 Interleave

• Zoned bit recording (ZBR)

• Vertical, horizontal, or top down mounting

• Dynamic spindle brake

• 1 Mbyte, or optional 4 Mbyte data buffer

• Hot plug compatibility (section 9.6.4.2 lists proper host connector needed) for “LC” model drives

• SCAM (SCSI Configured AutoMagically) plug-n-play level 2 compliant, factory set to level 1 (not user select-

able)

• Low audible noise for office environment

• Low power consumption

3.2 Media characteristics

The media used on the drive has a diameter of approximately 3.5 inches (86 mm). The aluminum substrate is coated with a thin film magnet ic materi al, overcoated with a proprie tary prot ective layer for improved dura bility and environmental protection.

3.3 Performance

• Supports in dustr y standard Fast-20 and Fast-40 SCSI interfaces (also called “Ultra-1 SCSI” and “Ultra-2 SCSI,” respectively)

• Programmable multi-segmentable cache buffer (see Section 4.4)

• 7200 RPM spindle. Average latency = 4.17 ms

• Command queuing of up to 64 commands

• Background processing of queue

• Supports start and stop commands (spindle stops spinning)

3.4 Reliability

• 1,000,000 hour MTBF

• LSI circuitry

• Balanced low mass rotary voice coil actuator

• Incorporates industr y-standa rd Self-Monitori ng, Analysis and Reporting Technol ogy (S.M.A.R.T.)

• Incorporates Seek To Improve Reliability algorithm (STIR)

• 5-year warranty

8 Barracuda 50 Product Manual, Rev. C

3.5 Unformatted a n d formatted capacities

Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows the standard OEM model capacities data.

Formatted data block size 512 bytes/sector [1] Unformatted

ST150176 05D2B03Bh (50 GB) [2] 63.1 GB

Notes.

[1] Sector size selectable at format time. Users having the necessary equi pment may modify the data block

size before issuing a format command and obtain di fferent fo rmatted capacities than those listed. See Mode Select Command and Format Command in the SCSI Interface Product Manual, part number

77738479.

[2] User available capacity depends on s pare reallocation scheme selected. The number of data tracks per

sparing zone and the num ber of alternate s ectors (LBAs) per spar ing zone can be de termined by using the Mode Sense command and reading Mode Page 03h. Total LBAs(h) x 200(h) = total byte capacity.

3.6 Programmable drive capacity

Using the Mode Select command, the drive can change its capacity to something less than maximum. See the Mode Select Parameter List table in the SCSI Inte rface Product Manual, part number 77738479. Refer to the Parameter list block descriptor number of blocks field. A value of zero in the nu mber of blocks fi eld indicates that the drive shall not change the capacity it is currently formatted to have. A number in the number of blocks field that is less than the max imum number o f LBAs changes the total drive capacity to the value i n the block descriptor number of blocks field. A value greater than the maximum numb er of LBAs is rounded down t o the maximum capacity.

3.7 Factory installed accessories

OEM Standard drives are shipped with the Barracuda 50 Installation Guide, part number 83329472 (unless otherwise specified). The factory also ships with the drive a small bag of jumper plug s used for the J2, J5, and J6 option select jumper headers.

3.8 Options (factory installed)

All customer requested options are in corporated duri ng production or packaged at t he manufacturing facility 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 secto r size requested.

• 4 Mbyte buffer size.

• Single unit shipping pack. T he drive is nor mally shipped in bulk packaging to provide max imum protection

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

• One B arracuda 50 Installation Guide, part numbe r 83 329472, is included with each standard OEM drive shipped, but extra copies may be ordered.

3.9 Accessories (user installed)

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

• Single unit shipping pack.

Barracuda 50 Product Manual, Rev. C 9

4.0 Performance characteristics

4.1 Internal drive characteristics (transparent to user)

ST150176

Drive capacity 50.07 GByte (formatted, rounded off values) Read/write heads 22 Bytes/track 189.28 kbytes (average, rounded off values) Bytes/surface 2,276 Mbytes (unformatted, rounded off values) Tracks/surface (total) 12,024 Tracks (user accessible) Tracks/inch 12,905 TPI Peak bits/inch 252 K BPI Internal data rate 153 - 264 Mbits/sec (variable with zone) Disc rotational speed 7,184 r/min Average rotational latency 4.17 msec Recording code 8/9 EPR4

4.2 SCSI performance characteristics (visible to user)*

The values given in Section 4.2.1 apply to all models of the Barracuda 50 family unless otherwise specified. Refer to Section 9.10 and to the S CSI Interface Product Manual, par t number 77738 479, for additional timing details.

4.2.1 Access time [8]

Including cont roller overhead (without disconnect) [1] [4]

Driv e l e ve l

Read Write

msec Average – Typical [3] 7.6 8.4 Single Track – Typical [3] 0.9 1.2 Full Stroke – Typical [3] 16 17

4.2.2 Format command execution time (minutes) [1]*

ST150176

Maximum (with verify) 120 Maximum (no verify) 70

4.2.3 Generalized performance chara cteris tics

Minimum sector interleave 1 to 1

Data buffer transfer rate to/from disc media (one 512-byte sector):

Min. [4]* Avg. [4] Max. [4]

19.1

27.8

33.0

MByte/sec MByte/sec MByte/sec

Data buffer transfer rate to /from disc media: (< 1 track):

Min. [4] Avg. [4] Max. [4]

MByte/sec divided by (interleave factor)

14.9 MByte/sec divided by (interleave factor)

21.7 MByte/sec divided by (interleave factor)

25.7

*[ ] All notes for Section 4.2 are listed at end of Section 4.2.3.

10 Barracuda 50 Product Manual, Rev. C

SCSI interface data transfer rate (asynchronous) [5]:

Maximum instantaneous 6.0 Mbytes/sec [6]

Maximum average 6.0 Mbytes/sec [7] Synchronous transfer rate for SCSI Fast-20 (Ultra-1 SCSI): 40 Mbytes/sec Synchronous transfer rate for SCSI Fast-40 (Ultra-2 SCSI): 80 Mbytes/sec Synchronous transfer rate for fast SCSI-2: 20 Mbytes/sec Sector Sizes:

Default 512 byte user data blocks

Variable 512 to 2,048 bytes per sector in multiples of 4

bytes per sect or. If n (number of bytes per sector requested) is

odd, then n-1 sectors will be used.

Read/write consecutive sectors on a track Yes Flaw reallocation performance impact (for flaws reallocated at format time using

Negligible

the spare sectors per sparing region reallocation scheme.) Overhead time for head switch (512 byte sectors) in sequential mode 1.2 msec

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

Notes for Section 4.2.

[1] Execution time measured from receipt of the la st Byte of the Command Descriptor Block (CDB) to the

request for a Status Byte Transf er to the Initiator (excluding connect/disconnect).

[2] Maximum times are specified over the worst case conditions of temperature, voltage margins and drive

orientation. When comparing spec ified access times, care should be taken to distinguish between typical access times and maximum access times. The best comparison is obtained by system benchmark tests conducted under identical conditions. Maximum times do not include error recovery.

[3] Typical Access times are measured under nominal conditions of temperature, voltage, and horizontal ori-

entation as measured on a representative sample of drives. [4] Assumes no errors and no sector has been relocated. [5] Rate measured from the start of the first sector transfer to or from the Host. [6] Assumes system ability to support the rates listed and no cable loss. [7] Simulated. [8] Access time = controller overhead + average seek time

Access to data = controller overhead + average seek time + latency time

4.3 S tar t/stop ti me

After DC power at nominal voltage has been applied, the drive becomes ready within 30 seconds if the Motor Start Option is disabled (i.e. the motor starts as soon as the power has been applied). If a recoverable error condition is detected during the star t sequence, the drive executes a recovery procedu re which may cause the time to become ready to exceed 30 sec onds. During spin up to read y time the drive responds to some c ommands over the SCSI interface in less than 1.5 seconds after appl ication of power. Stop time is less than 20 seconds from removal of DC power.

If the Motor Start Option is enabled, the inter nal controller accept s the commands listed in the SCSI Interface Product Manual less than 3 seconds after DC power has been applied. After the Motor Start Command has been received the drive becomes ready for normal operations within 25 seconds typically (excluding an error recovery procedure). The Motor Start Command can also be used to command the drive to stop the spindle (see SCSI Interface Product Manual, part number 77738479).

There is no power control switch on the drive.

Barracuda 50 Product Manual, Rev. C 11

4.4 Prefetch/multi-segmented cache control

The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. “Cache” as used herein refers to the drive b uffer storage space when it is used in “cache” operations. To s elect prefetch and cache features the host sends the Mode Select command with the proper values in the a pplicable bytes in Mode Page 08h (see SCSI Interface Product Manual, part number 77738479. Prefetch and cache operation are independent features from the standpoint that each is enabled and disabled independently via the Mode Select command. However, in actual operation the prefetch feature overlaps cache operation som ewhat as is noted in Section 4.5.1 and 4.5.2.

All default cache and prefetch Mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Table 9.

4.5 Cache operation

In general, all but 840 Kbytes (3,600 k bytes of th e 4, 096 kbytes on unit s with t his op tion) of the physical buffer space in the drive can be used as s torage space for cache operations. The buffer can be divided into logical segments (Mode Sele ct Page 08h, byte 13) from which data is read and to which data is written. The drive maintains a table of logical block disk medium addresses of the da ta stored in each se gment of the buffer. If cache operation is enabled (RCD bit = 0 in Mode Page 08h, byte 2, bit 0. See SCSI Interface Product Manual, part number 77738479), data requested by t he host with a Read com mand is retr ieved from the buffer (if it is there), before any disc access is initiated. If cache operation is not enabled, the buffer (still segmented with required number of segments) is still used, but only as circular buffer segments during disc medium read operations (disregarding Prefetch operation for the moment). That is, the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to retrieve i t. The retrieved data m erely passes through some buffer segment on the way to the host. On a cache “miss”, all data transfers to the host are in accordance with “buffer-full” ratio rules. On a cache “hit” the drive ignores the “buffer-full” ratio rules. See explanations associated with Mode page 02h (disconnect/reconnect control) in the SCSI Interface Product Manual.

The following is a simplified description of a read operation with cache operation enabled:

Case A -

A Read command is received and the first logical block (LB) is already in cache:

1. Drive transfers to the initiator the first LB requested plus all subsequent contiguous LB’s that are already in the cache. This data may be in multiple segments.

2. When a requested LB is reached that is not in any cache segment, the drive fetches it and any remaining requested LBs from the disc and puts them in a segment of the cache. The drive transfers the remaining requested LBs from t he cac he to the host in acco rdance with the disconnect/reconnec t sp ecification mentioned above.

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, the first LB of which is not in any segment of the cache:

1. The drive fetches the requested LB’s from the disc and transfers them into a segment, and from there t o the host in accordance with the disconnect/reconnect specification referred to in case A.

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

Each buffer segment is actually a self-contained circular storage (wrap-around occurs), the length of whic h is an integer number of disc medium sectors. The wrap-around capability of the individual segments greatly enhances the buffer’s overall performance as a cache storage, allowing a wide range of user selectable config- urations, which includes their use in the prefetch operation (if enabled), even when cache operation is disabled (see Section 4.5.2). The number of segm ents may be selected using the Mode Select comm and, but the size can not be directly selected. Size is selected only as a by-product of selecting the segment number specification. The size in Kbytes of each segment is not reported by the Mode Sense command page 08h, bytes 14 and

15. The value 0XFFFF is always reported. If a size specification is sent by the host in a Mode Select command

(bytes 14 and 15) no new segment size is set up by the drive, and if the “STRICT” bit in Mode pag e 00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt to change unchangeable parameters (see SCSI Interface Product Manual, part number 777384 79). The drive supports operation of any integer number of segments from 1 to 16.

12 Barracuda 50 Product Manual, Rev. C

4.5.1 Caching write data

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

If read caching is enabled (RCD=0), t hen dat a written to the medium is retained in the cache to be made avai lable for future read cache hi ts. The sam e buffer space and segmentation is us ed as set up for read f unct ions. The buffer segmentation scheme is set up or changed indep endently, having nothing to do with the state of RCD . When a write command is issued, if RCD= 0, the cache is first checked to see if any logical blocks that are to be written are already stored in the cache from a previous read or write command. If there are, the respective cache segments are cleared. The new data is cached for subs equen t Read com man ds.

If the number of write data logi cal blocks exceeds the size of the segment bei ng 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 t he drive may return GOOD status on a wri te command after the data has been transferred into the cache, but before the data has been written to the medium. If an error occurs while writing the dat a to the medium, and G OOD status has already been returned, a deferred error will be generated.

The Synchronize Cache command may be used to force the drive to write all cached write data to the medium. Upon completion of a Synchronize Cache command, all data received from previous write commands will have been written to the medium . The Start/Stop com mand with the stop bit set will force a sync cache operation before the drive stops.

Table 9 shows Mode default settings for the drives.

4.5.2 Prefetch operation

If the Prefetch feature is enabled, data in con tig uous l ogical blocks on the disc immediately beyond that wh ich was requested by a Read command can be retrieved and stored in the buffer for immediate transfer from the buffer to the host on subsequent Read commands that request those logical blocks (this is true even if “cache” operation is disabled). Though the prefetch operation uses the buffer as a “cache”, finding the requested data in the buffer is a prefe tch “hit”, not a “cache” operation “hit”. Prefetch is enabled using Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch. Since data that is prefetched replaces data already in some buffer segment(s), the host can limit the amount of prefetch data to optimize system performance. The max prefetch field (bytes 8 and 9) limits the amount of prefetch. The drive does not use the prefetch “ceiling” field (bytes 10 and 11).

During a prefetch operation, the drive crosses a cylinder boundar y t o fetch more data only if the Discontinuity (DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.

Whenever prefetc h (read look-ahead) is enabled (enabled by DRA = 0), it operates under the control of ARLA (Adaptive Read Look-Ahead). If the host uses software interleave, ARLA enables prefetch of contiguous blocks from the disc when it senses that a prefetch “hit” will likely occur, even if two consecutive read operations were not for phy sically contiguous blocks of data (e.g. “software interleave”). ARLA disables prefetch when it decides that a prefetch “hit ” will not likely o ccur. If the ho st is no t us ing s oftware inter leave, and if two seque ntial read operations are not for contiguous blocks of data, ARLA disables prefetch, but as long as sequential read operations request contiguous blocks of data, ARLA keeps prefetch enabled.

Barracuda 50 Product Manual, Rev. C 13

5.0 Reliability specifications

The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4).

Seek Errors

Less than 10 in 10

Read Error Rates [1]

Recovered Data Less than 10 errors in 10 Unrecovered Data Less than 1 sector in 10

Miscorrected Data Less than 1 secto r in 10 MTBF 1,000,000 hours Service Life 5 years Preventive Maintenance None required

Note.

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

5.1 Error rates

The error rates stated in this specification assume the following:

• The drive is operated per this specification using DC power as defined in this manual (see Section 6.2).

• The drive has been formatted with the SCSI FORMAT commands.

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

Section 3.2, “Media Characteristics.”

seeks

bits transferred (OEM default se ttings)

bits transferred (OEM default settings)

bits transferred

5.1.1 Environmental interference

When evaluating syste ms operation under conditions of Electromagnetic Interference (EMI), the performance of the drive within the system shall be c onsidered acc eptable if the drive does not generate an unrecoverable condition.

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

• Is not detected and corrected by the drive itself;

• Is not capable of being detected from the error or fault status provided through the drive or SCSI interface; or

• Is not capable of being recovered by normal drive or system recovery procedures without operator interven-

tion.

5.1.2 Read errors

Before determination or measurement of read error rates:

• The data that is to be used for measurement of read error rates must be v erifi ed as being written correctly on the m edia.

• All media defect induced errors must be excluded from error rate calculations.

5.1.3 Write errors

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

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

14 Barracuda 50 Product Manual, Rev. C

5.1.4 Seek errors

A seek error is defined as a failure of the dr ive to posi tion the heads to the addressed track. There shal l be no more than ten recoverable seek errors in 10

physical seek operations. After detecting an initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails, a seek positioning error (15h) is reported with a Medium error (3h) or Hardware error (4h) reported in the Sense Key. This is an unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Refer t o the SCSI Interface Product Manual, par t number 77 738479, for Request Sense in formation. S ee also Appendix A of this manual for a list of sense keys and additional sense codes supported by this drive.

5.2 Reliability and service

You can enhance the reliability of Barracuda 50 disc drives by ensuring that the drive receives adequate cooling. Section 6.0 provides temperatu re measurem ents and other i nformation that m ay be used to enha nce the service life of the drive. Section 8.3.1 provid es recomm ended air-flow information.

5.2.1 Mean time between failure

The production disc dri ve shall achieve an MTBF of 1,000,000 hours w hen operated in an environment that ensures the case temperatures specified in Section 6.4.1, Tabl e 3, Column 2 are not exceeded. Short-term excursions up to the specification limits of the operating environment will not affect MTBF performance. Continual or sustained operation at case temperatures above the values shown in Table 3, Column 2 m ay degrade product reliability.

The following expression defines MTBF

Estimated power-on operating hours in the period

MTBF per measurement period =

Number of drive failures in the period

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

Drive failure means any s toppage or substandard performance caused by drive malfunction.

5.2.2 Field failure rate vs time

The expected field failure rate is listed below. Drive utilization will vary. An estimated range of utilization is:

• 720 power-on hours (POH) per month.

• 250 on/off cycles per year.

• Read/seek/write operation 20% of power-on hours.

• Systems will provide adequate cooling to ensure the case tempe ratures specified in Section 6.4.1 are not

exceeded.

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

Failure rate is calculated as follows:

• No system-induced failures are counted

• Based on 1,000,000 MTBF and 720 power-on hours per month

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

5.2.3 Preventive maintenance

No routine scheduled preventiv e maintenance shall be required.

Barracuda 50 Product Manual, Rev. C 15

5.2.4 Service life

The drive shall have a usef ul service life of five years. Depo t repair or replacement of major parts is permitt ed during the lifetime (see Section 5.2.5).

5.2.5 Servi c e philosophy

Special equipment is required to repair the drive HDA. In order to achieve the above service life, repairs must be performed only at a proper ly equipped and st affed service and r epair facility. Troubleshooting and repair of PCBs in the field is not rec ommended, because of the extensive diagnostic equi pment required for effective servicing. Also, there are no spare parts available for this drive. Drive warranty is vo ided if the HDA is opened.

5.2.6 Service tools

No special tools are required for site installation or recommended for site maintenance. Refer to Section 5.2.5. The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not practical since there are no user purchasable parts in the drive.

5.2.7 Hot plugging Barrac uda 50 disc drives

The ANSI SPI-2 (T10/1142D) docum ent defines the physical requirements for removal and insertion of SCSI devices on the SCSI bus. Four cases are addressed. The cases are differentiated by the state of the SCSI bus when the removal or insertion occurs.

Case 1 A ll bus devices powered off during removal or insertion Case 2 RS T signa l asserted continuously during removal or insertion Case 3 Current I/O processe s not allowed during inser tion or removal Case 4 Current I/O proces s allowed during insertion or removal, exc ept on the device being changed

Seagate Barracuda disc drives support four hot plugging cases. Provision shall be made by the system such that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus. A device being removed shall maintain power and ground connections after the disc onnection of any device signal contact from the bus (see SFF-8046, SCA-2 specification).

It is the responsibility of the systems integrator to assure that no hazards from temperature, energy, voltage, or ESD potential are presented during the hot connect/disconnect operation.

All I/O processes for the SCSI device being insert ed or removed shall be quiescent. All SCS I devices on the bus shall have receivers that conform to the SPI-2 standard.

If the device being hot plugged uses single-ended (SE) drivers and the bus is currently operating in low voltage differential (LVD) mode, then all I/O processes for all devices on the bus must be completed, and the bus quiesced, before attempting to hot plug. Following the insertion of the newly installed device, the SCSI host adapter must issue a Bus Re set, followed by a synchronous transfer negotiation. Failure to perform the SCSI Bus Reset could result in erroneous bus operations.

The SCSI bus termination and termination power source shall be external to the device being inserted or removed.

End users should not mix devices with high voltage differential (HVD) drivers and receivers and devices with SE, LVD, or multimode drivers and receivers on the same SCSI bus since the common mode voltages in the HVD environment may not be controlled to safe levels for SE and LVD devices (see ANSI SPI-2).

The disc drive spindle must come to a complete stop prior to completely rem oving the drive from the cabinet chassis. Use of the Stop Spindle command or partial withdrawal of the drive, enough to be disconnected from the power source, prior to removal are methods for insuring that this requirement is met. During drive insertion, care should be taken to avoid exceeding the limits stated in Section 6.4.4, "Sh ock and vibration," of this manual.

16 Barracuda 50 Product Manual, Rev. C

5.2.8 S.M.A.R.T.

S.M.A.R.T. is an acronym for Self-Monitoring Anal ysis and Re porting Techn ology. This tec hnology is intended to recognize conditions that indicate a drive failure and is designed to provide sufficient warning of a failure to allow data back-up before a n actual failure occurs.

Note.

The firmware will monitor specific attributes for degradation over time but cannot predict instantaneous drive failures.

Each attribute has been selecte d to m onitor a s pecific s et of failure conditions in th e operating pe rformanc e of the drive, and the thresholds are optimized to minimize “false” and “failed” predictions.

Controllin g S.M.A.R.T.

The operating mode of S.M.A.R.T. is controlled by the DEX CPT bit and the PERF bit of the “Informational Exceptions Control Mode Page” (1Ch). The DEXCPT bit is used to enable or di sable the S.M.A.R.T. process. Setting the DEXCPT bit will disable all S.M.A.R.T. functions. When enabled, S.M.A.R.T. will collect on-line data as the drive performs normal read/write operations. When the PERF bit is set, the drive is considered to be in “On-line Mode Only” and will not perform off-line functions.

The process of meas uring off-line attributes and saving data can be forced by the RTZ (retur n to zero) command. Forcing S.M.A.R.T. will r es et the timer so that the next schedule d interrupt will be two hours.

The drive can be interrogated by the host to determine the time remaining before the next scheduled measurement and data logging process will occur. This is accomplished by a log sense command to log page 0x3E. The purpose is to allow the customer to control when S.M.A.R.T. interruptions occur. As described above, f orcing S.M.A.R.T by the RTZ command will reset the timer.

Performance impact

S.M.A.R.T. attribute data will be saved to the disc for the purpose of recreating the events that caused a predictive failure. The drive will measure and s ave parameters once every two hours subject t o an idle period on the SCSI bus. The process of measuring off-line attribute data and saving data to the disc is uninterruptable and the maximum delay is summarized below:

Maximum processing delay

On-li ne o nly de l ay Fully enabled de lay DEXCPT = 0, PERF = 1 DEXCPT = 0, PERF = 0

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

Repor tin g c on t rol

Reporting is c ontrolle d i n the “Informational Exceptions Control Page” (1Ch). Subject to the reporting method, the firmware will issue to the “host” an 01-5D00 sense code. The error code is preserved through bus resets and power cycles.

Determining rate

S.M.A.R.T. monitors the rate at wh ich errors occur and sig nals a predictive failure if the rate of degraded error rate increases to an unacceptable level. To determine rate, error events are logged and compared to the num ber of total operations for a gi ven attribute. The interval defines the number of operations over which to measure the rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter.

S.M.A.R.T. measures error rate, hence for each attribute the occurrence of an “error” is recorded . A counter keeps track of t he num ber of errors for the current interval. This counter is referred to as the Fai lure Counter.

Error rate is simply 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 t he number of errors and the i nterval. If the number of errors exceeds the threshold before the interval expires, then the error rate is considered to be unacceptable. If the number of errors does not exceed the threshold before the interval expires, then the error rate is considered to be acceptable. In either case, the interval and failure counters are reset and the process star ts over.

Barracuda 50 Product Manual, Rev. C 17

Predictive failures

S.M.A.R.T. signals predictive failures when the drive is p erform ing unacc eptably for a per iod of t ime. T he firm ware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accomplish this, a counter is incremented whenever the error rate is unacceptable and decremented (not to exceed zero) whenever the error rate is acceptable. Should the counter continually be incremented such that it reaches the predictive threshold, a predictive failure is signaled. This counter is referred to as the Failure History Counter. There is a separate Failure History Counter for each attribute.

5.2.9 Product warranty

Beginning on the date of shipment to customer and continuing for a period of five years, Seagate warrants that each product (including components and subassemblies) or spare part that fails to function properly under normal use due to defect in materials on workmanship or due to nonconformance to the applicable specifications will be repaired or replaced, at Seagate ’s option and at no charge to customer, if returned by customer at customer’s expense to Seagate’s designated facility in accordance with Seagate’s Warranty Procedure. Seagate will pay for tran sporting the repair or replaceme nt item to customer. For more detailed warranty information refer to the Standard terms and condition s of Purchase for Seagate products.

Shipping

When transpor ting or shipping a drive, a Seagate approved containe r must be used. Keep your original box. They are easily identified by the Seagate Appr oved Package labe l. Shipping a drive in a non-approved container voids the drive warranty .

Seagate repair centers may refuse recei pt of compon ent s im properly packaged or obviously damage d in transit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends s hipping by an air-ride carrier experienced in handling computer equipment.

Product repair and re turn information

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

Barracuda 50 Product Manual, Rev. C 19

6.0 Physical/electrical specifications

This section provides information rela tin g to the physical and electrical characteristics of the Barracuda 50 drive.

6.1 AC power requirem ents

None.

6.2 DC power requirements

The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector. The table shows current values in Am peres. See also Fig ure 3c for current and power values vs. number of I/O operations.

T able 2: DC power requirements

ST150176

Notes

Voltage +5 V +12 V +5 V +12 V Regulation [5] ±5% ±5%[2] ±5% ±5%[2] Average idle current DCX

[1] 0.66 0.71 0.67 0.71

Maximum starting current

(peak DC) DC (peak AC) AC

[3]

[3] Delayed motor start (max) DC [1][4] 0.59 0.02 0.60 0.02 Peak operating current

Typical DCX Maximum DC

[1][6]

[1]

Maximum (Peak)

SE Mode LVD Mode

0.75

1.34

0.74

0.77

1.07

2.6

3.4

1.15

1.22

2.6

0.78

1.4

0.78

0.81

1.26

2.6

3.4

1.15

1.22

2.6

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

ues. Power supply is at nominal voltages.

[2] For +12 V, a –10% droop is permissible during initial start of spindle, and must return to ±5% before 7,200

rpm is reach ed. The ±5% must be maintained a fter the drive signifies that its power-up sequence has

been completed and that the drive is able to accept selection by the host initiator. [3] See +12 V current profile in Figure 3. [4] This condition occurs when the Motor Star t Option is enabled and the drive has not yet received a Start

Motor co mm a n d. [5] See Section 6.2.1 “Co nducted Noise Immunity.” Specified voltage tolerance is inclusive of ripple, noise,

and transient response. [6] Operating condition is defined as random 8 block reads at 142 input/o utput operations per second. Cur-

rent and power specified at nominal voltages. Decreasing +5 V supply by +5% increas es 5 V current by

0.3%. Decreasing +12 V supply by 5% increases +12 V current by 3.2%.

General Notes from Tabl e 2:

1. Minimum current loadin g for each supply voltage is not less than 0.7% of the maxim um operating current

shown.

2. The +5 and +12 volt supplies shall employ separate ground returns.

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

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

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

5. No terminator power.

20 Barracuda 50 Product Manual, Rev. C

6.2.1 Conducted noise immunity

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

+5 V = 150 mV pp from 0 to 50 kHz and 100 mV pp from 50 kHz to 10 MHz.

+12 V = 150 mV pp from 0 to 50 kHz and 100 mV pp from 50 kHz to 10 MHz.

6.2.2 Power sequencing

The drive does not req uire power sequenc ing. The d rive protects against inadvertent writing d uring power-up and down. Daisy-chain operation requires th at power be maintained o n the ter minated dr ive to ensure proper termination of the peripheral I/O cables. To automatically delay motor star t based on the target ID (SCSI ID) enable the Delay Motor Start option and disable the Enable Motor Star t option on the J2 conne ctor. See Section 8.1 for pin selection infor mation. To delay the motor until the drive receives a Start Unit command, enable the Enable Motor Start option on the J2 connector.

6.2.3 Curre nt prof ile

Figures 3 and 5 identify the drive +5 V and +12 V current profile. The current during the various times is as shown:

T - Power is applied to the drive. T1 - Controller self tes ts are per formed. T2 - Spi ndle begi ns to accelerate under current limiting after performing drive internal

diagnostics. See Note 1 of T able 2. T3 - T he heads move from the landing zone to the data area. T4 - The adaptive servo calibration sequence is performed. T5 - Ca libration is complete and the drive is ready for reading and writing.

Note.

All times and currents are typical. See Table 2 for m aximum current requirements.

+12 Volt Current during spindle start – Typical Amperes

3.0

2.5

2.0 A

1.5

1.0

0.5

0.0

T0 T1 T3 T4

0.0 2 4 6 8 10 12 14 16

Seconds

Peak AC Envelope Peak DC

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

Barracuda 50 Product Manual, Rev. C 21

+5 Volt Current during spindle start – Typical Amperes

+5V

Current

(amps)

1.0 A

0.5

Nominal (average) DC curve

0.0

TT0T2 T2T2 T5

Component

0.0 4 8 12 16 20 24 28 32

Seconds

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

6.3 Power dissipation

For drives using single-ended interface circuits, typical power dissipation under idle conditions i s 11.82 watts (40.3 BTUs per hour).

For drives using differential interface circuits, typical power dissipation under idle conditions is 11.87 watts (40.5 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 5 and 6). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and the t otal watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.

22 Barracuda 50 Product Manual, Rev. C

1.600 5V A

1.400

1.200

12V A Watts

1.000

0.800

Amperes

0.600

0.400

0.200

0 50 100

I/Os per Second

Figure 5. DC current and power vs. input/output operations per second (SE mode)

1.600

1.400

1.200

Watts

150

5V A 12V A Watts

1.000

0.800

Amperes

0.600

0.400

Watts

0.200 0 50 100

150

I/Os per Second

Figure 6. DC current and power vs. input/output operations per second (LVD mode)

6.4 Environmental limits

Temperature and humi dity values experienced by the drive must be suc h th at con densat ion do es not occu r on any drive part. Altitude and atmospheric pressu re specifications are referenc ed to a standard day at 58.7°F (14.8°C). Maximum Wet Bulb temperature is 82°F (28 °C).

Barracuda 50 Product Manual, Rev. C 23

6.4.1 Temperature

a. Operating

With cooling designed to maintain the case temperatures of Table 3, Colum n 2, the drive meets all specifications over a 41°F to 122°F (5°C to 50°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that the temperatures at the locations s pecified in Ta ble 3, column 1 are not exceeded. Air flow m ay be needed t o achieve these temperature values (see Section 8.3 and 8.3.1). Operation at case temperatures [4] a bove these values may adversely affect the drives ability to meet specifications.

The MTBF specification for the drive is based on operating in an environment that ensures that the case temperatures specified in Table 3, column 2 are not exceeded. Occasional excursions to drive ambient temperatures of 122°F (50°C) or 41°F (5°C) may occur without impact to specified MTBF. Air flow may be needed to achieve these temperatures (see Section 8.3.1). Continual or sustained operation at ca se temperatures above these values may degrade MTBF.

To confirm that the required cooling for the Barracuda electronics and HDA is provided, place the drive in its final mechanical configuration, perform random write/read operations. After the temperatures stabilize, measure the case temperature of the components listed in Table 3 (see notes [2] and [3]).

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

T able 3: PCB and HDA temperatures

Column 2 Maximum allowable case [4] temperatures (°C) to meet MTBF spec.

Items in Figure 7

Column 1 Maximum case [4] temperatures (°C) operating (50° ambien t ) [ 2]

HDA [3] 60 45 180 60 268 48 376 56 471 51

Note.

[1] Section 8.3.1 describes the air-flow patterns to be used to meet case temperatures in column 2. Air

flow should be opposite that shown in Section 8.3.1. Air velocity should be adequate to ensure that the case temperatures in Column 2 are not exceeded during drive operation.

[2] The temperatures in Column 1 are calculated and m ay not reflect actual operating values. Sufficient

cooling air may be required to ensure that these values are not exceeded. [3] Measure HDA temp at point labeled “HDA” on Figure 7. [4] PCB mounted integrated circuit case.

b. Non-operating

–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive.

24 Barracuda 50 Product Manual, Rev. C

HDA Temp.

Check Point

Model “LC” PCBA

U11

U18

U14

U12

J1A

U20

1.0"

.5"

Model “LW” PCBA

U11

U18

U14

U12

U20

Figure 7. Locations of PCB components listed in T able 3

Barracuda 50 Product Manual, Rev. C 25

6.4.2 Relative humidity

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

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

b. Non-operating

5% to 95% non-condensing relative humidity.

6.4.3 Effective altitude (sea level)

a. Operating

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

b. Non-operating

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

6.4.4 Shock and vibration

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

The limits of shock and vibration defined within this document are specified with the drive mounted by any of the four methods shown in Figure 8 , and in ac cordance wit h the restri ctions of Sec tion 8.4. O rientation 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 5 Gs at a maximum duration of 11 msec (half sinewave). Shock may be applied in the X, Y, or Z axis.

b. Operating—abnormal

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

c. Non-operating

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

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

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

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

26 Barracuda 50 Product Manual, Rev. C

d. Packaged

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

Pack age size Packa ged/product weight Drop height

<600 cu in (<9,800 cu cm) A ny 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)

Y X

Figure 8. Recommended mounting

Barracuda 50 Product Manual, Rev. C 27

6.4.4.2 Vibration

a. Operating - normal

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

5-400 Hz @ 0.5 G Vibration may be applied in the X, Y, or Z axis.

b. Operating - abnormal

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

c. Non-operating

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

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

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

22-400 Hz @ 2.00 G Vibration may be applied in the X, Y, or Z axis.

6.4.5 Air cleanliness

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

6.4.6 Acoustics

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

6.4.7 Electromagnetic susceptibility

See Section 2.1.2.

28 Barracuda 50 Product Manual, Rev. C

6.5 Mechanical specifications

The following nominal dimensions are ex clusive of the decorative front panel accessory. However, dimensions of the front panel are shown in figure below. Refer to Figures 9 and 10 for detailed mounting configuration dimensions. See Section 8.4, “Drive mounting.”

Height: 1. 62 in 41.1 mm Width: 4.000 in 101.6 mm Depth: 5.75 in 146.05 mm Weight: 2.2 pounds .99 kilograms

-Z-T//

[1]

-Z-

-X-

[1]

Notes:

Mounting holes are 6-32 UNC 2B, three

[1]

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

0.12 in. (3.05 mm).

Dimension Table

Inches

1.654

5.787

4.000

3.750 .125

1.750

1.625

1.122

4.000 .250

1.638 .181

1.625 .265 .315 .015 .015

max max

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

± .020 ± .010 ± .040

max max

B C D E

F G H

J K

L M

P R S

T U

Millimeters

42.01

147.00

101.60

92.25

3.18

44.45

41.28

28.50

101.60

6.35

41.60

4.60

41.28

6.73

7.00

0.38

max max ± .25

± .25

± .25 ± .50 ± .50 ± .25 ± .25 ± .25 ± .50

± .50 ± .25 ± .10

max max

-X-

Figure 9. Mounting configuration dimensions for “LW” model

Barracuda 50 Product Manual, Rev. C 29

-Z-T//

[1]

-Z-

-Z- -X-N

-Z-

-X-

[1]

Notes:

Mounting holes are 6-32 UNC 2B, three

[1]

on each side and four on the bottom. Max screw penetration into side of drive is 0.15 in. (3.81 mm). Max screw tightening torque is 6.0 in-lb (3.32 nm) with minimum full thread engagement of 0.12 in. (3.05 mm).

Dimension Table

Inches

1.654

5.787

4.000

3.750 .125

1.750

1.625

1.122

4.000 .250

1.638 .181 .040

1.625

2.618 .276 .015 .015

max max

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

max

± .020 ± .010 ± .040

max max

B C D E F G H

J K L M N P R S T U

Millimeters

42.01

147.00

101.60

92.25

3.18

44.45

41.28

28.50

101.60

6.35

41.61

4.60

1.20

41.28

66.50

7.00

0.38

± .25

max max

± .25

± .25 ± .50 ± .50 ± .25 ± .25 ± .25 ± .50

max

± .50 ± .25 ± 1.02

max max

-X-

Figure 10. Mounting configuration dimensions for “LC” model

Barracuda 50 Product Manual, Rev. C 31

7.0 Defect and error management

The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of defect management routines by the host (initiator).

Defect and error management in the SCSI system involves the drive internal defect/error management a nd SCSI systems error considerations (errors in communications between Initiator and the drive). Tools for use in designing a defect/error management plan are bri efly outlined in this section, with references to other sections where further details are given.

7.1 Dri ve internal defects

During the initial drive format operation at the factory, media defects are identified, tagged as being unusable, and their locations recorded on the drive primar y defects list (refe rred to as the “P” list and also as the EFT defect list). At fac tory format time, these known defects are also reallocated, that is, reassigned to a new place on the medium and the locati on listed in the defects reallocation table. The “P” list is not altered after factory formatting. Locations of defects found and reallocated during error recovery procedures after drive shipment are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator using the Read Defect Data command (see the SCSI Interface Product Manual, part number 77738479).

7.2 Drive error recovery procedures

Whenever an error occurs during drive operation, the d rive, if programmed to do so, performs error recovery procedures to attempt to recover the data. The error recovery procedures used depen d on the options previously set up in the error recovery parameters mode page. Error recovery and defect management m ay involve the use of several SCSI commands, the details of which are descri bed in the S CSI Interface Product Manual. The drive implements selectable error recovery time limits such as are required in video applications. For additional information on this, refer to the Error R ecovery Page table in the SCSI Interfa ce Product Manual which describes the Mode Select/Mode Sense Error Recovery parameters.

The error recovery scheme supported by the drive provides a means to control the total error recovery time for the entire command in addition to controlling the recovery level for a single LBA. The total amount of time spent in error recovery for a command can be limited via the Recovery T ime Limit bytes in the Error Rec overy Mo de Page. The total amount of time spent in error recovery for a single LBA can be limited via the Read Retry Count or Write Retry Count bytes in the Error Recovery Mode Pa ge.

The drive firmware error recover y algorithms consist of 12 levels for read recoveries and 2 levels for writes. Each level may consist of multiple steps, where a step i s defined as a rec overy function involving a single reread or re-write attempt. The maximum level used by the drive in LBA recovery is determined by the Read and Write Retry Counts.

Table 4 equates the Read and Write Retry Count with the maximum possible recovery time for read and write recovery of individual LBAs. The times given do not i nc lude time taken to perform reallocations, if reallocations are performed. Reallocations are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the Recovery Time Limit for the comm and has not yet been met . Time needed to perform reallocation is not counted against the Recovery Time Limit.

The Read Continuous (RC) bit, when set to one, requests the disc dr ive to transfer the requested data length without adding delays (for retries or ECC correction) that may be req uired to insure data integrity. The disc drive may send erroneous da ta in order to maintain the continuous flow of dat a. Set the RC bit to one only when data integrity is not a concern and speed is o f utmost importance. If the Recovery Time Limit or retry count is reached during error recovery, t he state of the RC bit is examined. If the RC bit is set to one, the drive will transfer the unrecovered data with no error indication and continue to execute the remaining com mand. If the RC bit is not set, t he drive will stop data transfer with the last goo d LBA, and report a “Check Condition, Unrecovered Read Error.”

32 Barracuda 50 Product Manual, Rev. C

Table 4: Read and write retry count maximum recovery times [1]

Read retry count

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

Maximum recovery time per LBA (cumul ative, msec)

Writ e re try count

Maximum re covery ti me per LBA (cumulative, msec)

[1] These values may change at any time. They are pres ently for general information only. Setting these retry count s to a value below the default setting could result in an increased unrec overed error

rate which may exceed the value given in this product manual. For example, suppose the read/write recovery page ha s the RC bit = 0, the read retry cou nt set to 4, an d the

recovery time limit (Mode Sense Page 01, bytes 10, 11) set to 450. A 4-block read command can take up to 159 msec recovery time for each block and a maximum of 450 msec recovery for all 4 blocks. If either of these limits is reached and a block has not yet been recovered, the command will end with CHECK CONDITION status and an unrecoverable read error will be reported.

7.3 SCSI system s errors

Information on the reporting of operational errors or faults across the interface is given in the SCSI Interface Product Manual, part number 77738479. Message Protoc ol System is described in the SCSI Interface Product Manual. Several of the messages are used in the SCSI systems error management system. The Request

Sense command returns information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results reports the results of diagnostic operations performed by the drive.

Status returned by the drive to the Initiator is described in the SCSI Interface Product Manual. Status reporting plays a role in the SCSI systems error management and its use in that respect is described in sections where the various commands are discussed.

Barracuda 50 Product Manual, Rev. C 33

8.0 Installation

The first thing to do wh en installing a dr ive is to set the drive ID (select) on the SCSI bus and set up certain operating options. This is usually done by installing small shorting jumpers on the pins of connectors J2 and J6 on the PCB (or J5 on the “LW” model), or via the drive to host I/O signals on the “LC” m odel. So me users c onnect cables to J6 or J5 and perform the set-up using remote switches.

If your system is “SCAM” (SCSI Configured Automatically) compliant, the system assigns the drive ID over the interface, so there is no need to be concerned ab out drive ID. Setting the drive ID jumpers doesn’t h urt a nything, but is not necessary.

If your syste m is not “SCAM” compliant you do need to set the drive ID using the ID jumpers.

Configure drive options

For option jumper locations and definitions refer to Figures 11, 12, and 1 3. Drive default mode parameters are not normally needed for installation. Refer to Section 9.3.2 for default mode parameters if they are needed.

• Ensure that the SCSI ID of the drive is not the same as the host adapter. Most host adapters use SCSI ID 7. ID 7 is the highest priority on both 8 and 16 bit data buses.

• If multiple devices are on the bus set the drive SCSI ID to one that is not presently used by other dev ices on the bus.

• If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. External terminators must be provided by the user, systems integrator or host equipment manufacturer.

• If the drive is attached to a bus that contains other devices, and the n ew drive is not attached to the end of the bus, no terminator is required on the new drive.

Note.

• Set all appropriate option jumpers for desired operation prior to power on. If jumpers are changed after

• Installation instructions are provided by host system documentation or with any additionally purchased drive

• Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as

Formatting

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

• Reformat the drive if a different spare sector allocation scheme is selected.

• High level format the drive involves assigning one or more partitions or logical drives to the drive volume. Fol-

• Systems that have Windows 95 Operat ing System version 950B (this has FAT 32) or later do not need to par-

8.1 Dri ve ID/optio n select heade r

Figures 11 and 12 shows views of the drive ID select jumper connectors. Figure 13 shows the option select jumper connector for all models. Figure 11 shows a rear view of model drives for the purpose of showing J5 of the drive. Both J5 and J6 have pins for selecting drive I D and f or connecting the remote LED cable. Only one or the other should be used, although using both at the same time would not damage the drive. The notes following the figures describe the functions of the various jumper positions on the connectors J2, J5, and J6. See your local sales representative for suggested par t number. A bag c ontaining jumpe r plugs is s hipped with the standard OEM drives.

For additional information about ter m inator requirement s, refer to Sections 9.8 and 9.9.

power has been applied, recycle the drive power to make the new settings effective.

installation software. If necessary see Section 10 for Seagate support services telephone numbers.

the manufacturer labels contain information required when ser vicing the produ ct.

512 byte sectors.

low the instructions in the system manuals for the system into which the drive is to be installed.

tition the drive.

34 Barracuda 50 Product Manual, Rev. C

Drive Front

Jumper Plug

(enlarged to show detail)

Pin 1

[1]

Reserved

A2A1A

SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7

[4]

SCSI ID = 8 SCSI ID = 9 SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15

Shipped with cover installed.

Host

[4]

Alternate Usage Plug:

+5V

[6]

Reserved

Pins

1197531

6842

Ground

Do not install jumpers; retain cover.

Drive Activity LED

Dashed area is optional host circuitry (external to the drive)

[4]

connected to host supplied optional usage plug.

Do not connect anything to pins 13-20.

[1] Voltage supplied by drive

Figure 11. Barracuda 50 family drive ID select for mode ls “LW” and “LC”

Barracuda 50 Product Manual, Rev. C 35

Drive HDA (rear view, PCB facing downward)

68 Pin

SCSI I/O Connector

[4]

Pin 1

+5V Ground

Pin 1

[2]

SCSI ID = 0 (default) SCSI ID = 1

SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7

SCSI ID = 8 SCSI ID = 9

SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15

A3A2A

1197531

Host Alternate Usage Plug

Reserved

N.C.

[4]

12 10 8 6 4 2

+5V

Dashed area is optional host circuitry (external to the drive) connected to host supplied optional usage plug.

N.C.

Ground

Drive Activity LED

A0A1A2A

[1] [2]

1P2P3P4P

J1-DC Power

For ID selection use jumpers as shown or connect a cable for remote switching as shown below.

Pins 1, 3, 5, and 7 are optional connections to switching circuits in host equipment to establish drive ID.

Remote Switches

Pins 2, 4, 6, and 8 are normally not grounded. They are driven low (ground) for 250 ms after a Reset or PWR ON to allow drive to read SCSI ID selected.

PCB

[1] Voltage supplied by drive

Figure 12. Barracuda 50 family drive ID select header J5 for “LW” model (J5 Pins 1A - 12A)

36 Barracuda 50 Product Manual, Rev. C

Additional notes on these

functions in section 8.1.2.

Jumper

Positions

Force single-ended bus mode

Delay Motor Start

Enable Remote Motor Start

Write Protect

Parity Disable

Reserved

Term. Power to SCSI Bus

SEDSMEWPP

Pin 1

EST

[3]

(applies to “LW” model only; reserved on “LC” model)

Jumper Plug

(enlarged to show detail)

Drive Front

Figure 13. Barracuda 50 family drive J2 option select header for “LC” and “LW” models

8.1.1 Notes for Figures 11, 12, and 13.

[1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J5, and J6 are

given here and in Section 8.1.2. The term “

default

” means as standard OEM units are configured with a jumper on those positions whe n shipped from factory. “Off” means no jumper is installed; “On” means a jumper is installed. OFF or ON underlined is factory

default

condition.

The PCBA on LC m odels does not have connector J5. The J5 co nnector signals conform to SFF-80 09 Revision 2.0, Unitized Connector for Cabled Drives, signal assignments for auxiliary connectors.

[2] These signals are also on 80-pin J1 I/O connector. See Tables 14 and 15. [3] Voltage supplied by the drive.

Barracuda 50 Product Manual, Rev. C 37

8.1.2 Function description

J2 jumper installation Jumper function description

On Forces drive to use single-ended I/O drivers/receivers only. Off Drive can operate on the interface in low vol tage differential mode or single-ended, depend-

ing on the voltage state of the I/O “DIFFSNS” line.

Default

is SE jumper not installed.

DS ME

Off

Off Spindle starts immediately after power up—

Default

setting. Off On Drive spindle does not start until Start Unit command received from host. On Of f Spindle Star tup is delayed by SCSI ID times 1 2 seconds a fter power is ap plied, i.e., drive 0

spindle starts immedia tely when DC power connected, drive 1 st art s after 12 second delay, drive 2 starts after 24 second delay, etc.

On On Dri ve spindle starts when Star t Unit command received from host. Delayed start feature is

overridden and does not apply when ME jumper is installed.

On Entire drive is write protected. Off

Drive is not write protected.

Default

is WP jumper not installed.

On Parity checking and parity error reporting by the drive is disabled. Off

Drive checks for parity and reports result of parity checking to host.

Default

is PD jumper not installed.

RES

Off

Reserved jumper position. Default is no jumper installed.

TP ( D oes no t apply t o “LC” model)

Off

The drive does not supply terminator power to external term inators or to the SCSI bus I/O cable.

On Drive supplies power to the SCSI bus I/O cable. When drives have differential I/O circuits, a

jumper on the TP1 position may be needed to power external terminators (see system documentation). These drives do not have terminator circuits on the drive.

38 Barracuda 50 Product Manual, Rev. C

8.2 Dri ve orientation

The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive performance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, and these are the two preferred mounting orientations.

8.3 Cooling

Cabinet cooling must be designed by the customer so that the amb ient temp erature immediately s urrounding the drive will not exceed temperat ure conditions specified in Section 6 .4.1, “Te mperature.” Specific consider- ation should be given to make sure adequate air circulation is present around the printed circuit board (PCB) to meet the requirements of Section 6.4.1, “Temperature.”

8.3.1 Air flow

The rack, cabinet, or drawer environment for the Barracuda 50 dr ive must provide heat rem oval from the electronics and head and disc assem bly (HDA). You s hould confir m that adequ ate heat removal is provided using the temperature measurement guidelines descr ibed in Section 6.4.1.

Forced air flow may be requi red to keep temperatures at or below the specified case temperatures of Table 3, Column 2, in which case the drive should be or iented, or air flow directed, so that the least am ount of air flow resistance is created while providing air flow to the electronics and HDA. Also, the shortest possible path between the air inlet and exit should be chosen to minimize the travel length of air heated by the drive and other heat sources within the rack, cabinet, or drawer environment.

If forced air is determined to be neces sary, possible air-flow patterns are shown in Figure 14 . The ai r-flow patterns are created by one or more fans, either forcing or drawi ng air as shown in the illustrations. Conduction, convection, or other forc ed air-flow patterns are acceptable as long as the temperature measurement guidelines of Section 6.4.1 are met.

Above unit

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

Under unit

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

Figure 14. Air flow (suggested)

Above unit

Under unit

Barracuda 50 Product Manual, Rev. C 39

8.4 Dri ve moun ting

When mounting the dri ve using th e bot tom holes (x-y plane in Figure 8) care m ust b e t aken to ens ure that the drive is not physically distorted due to a stiff non-flat mounting surface. The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm). The following equation and paragraph define the allowable mounting surface stiffness:

k * x = F <

15lb = 67N

where ‘k’ represents the mounting surface stiffness (units of lb/in or N/mm), and ‘x’ represents the out-of-plane mountin g surface di stor tion (uni ts of inc hes or mi llimeters ). The o ut-of-plan e distor tion (‘x’) is determined by defining a plane with t hree of the four mounting points fixed and evaluating the out-of-plane deflection of the fourth mounting point when a known force is applied to the fourth point.

Note.

Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate 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 mechanical struct ure capable of mounting the drive so that i t can meet t he shoc k and vibration specifications listed in this manual.

8.5 Grounding

Signal ground (PCB) and HDA ground are connected together in the drive and cannot be separated by the user. The equipment in which the drive is mounted is connected directly to the HDA and PCB with no electrically isolating shock mounts. If it i s desired for the system chassis to not be connected to the HDA/PCB ground, the systems integrator or user must provide a nonc onductive (electrically isolating) method of moun ting the drive in the host equipment.

Increased radiated emissions may result if you do no t provide the maximum s urface area ground connection between system ground and drive ground. This is t he system designer’s and integrator’s responsibility .

Barracuda 50 Product Manual, Rev. C 41

9.0 Interface requirements

This section contains SCSI interface information for B arracuda 50 drives.

9.1 General description

This section describes in es sentially gen eral ter m s th e interface requirements supported by the Barracuda 50. No attempt is made t o describe all of t he minute details of c onditions and constraints that must b e c onsid ered by designers when designing a system in whi ch this family of drives can properly operate. Seagate d eclares that the drives operate in accordance with the appropriate ANSI Standards referenced in various places herein, with exceptions as noted herein or in the Seagate SCSI I nterface Product Manual , part number 77738479.

9.2 SCSI interface m essag es sup ported

Table 5 lists the messages supported by the SCSI-2 and SCSI-3 modes of the Barracuda 50 family drives.

T able 5: SCSI messages supported by Barracuda 50 family drives

Supported by

Message name Message code

Abort 06h Y Abort-tag 0Dh Y Bus device reset 0Ch Y Clear queue 0Eh Y Command complete 00h Y Continue I/O process 12h Y Disconnect 04h Y Extended messages 01h[1] Y Identify 80h-FFh Y Ignore wide residue (two bytes) 23h Y Initiate recovery 0Fh N Initiator detected error 05h Y Linked command complete 0Ah Y Linked command complete with flag 0Bh Y Message parity error 09h Y Message reject 07h Y Modify data pointer [1] N No operation 08h Y Queue tag messages (two bytes)

Head of queue tag 21h Y Ordered queue tag 22h Y

Simple queue tag 20h Y Release recovery 10h N Restore pointers 03h Y Save data pointer 02h Y Synchronous data transfer req. [1] Y Target transfer disable 13h Y Terminate I/O process 11h N Wide data transfer request [1] Y

Barracuda 50

Notes.

[1] Extended messages (see the SCSI Interface Product Manual, part number 77738479).

42 Barracuda 50 Product Manual, Rev. C

9.3 SCSI interface comm a nds suppor ted

Table 6 following lists the SCSI interface commands that are suppor ted in the SCSI-2, an d SCSI-3 modes of the drive. Barracuda 50 Family drives can be changed back and for th between SCSI-1 and SCSI-2/SCSI-3 modes using the Change Definition Command . OEM standard drives are shipped set to operate in SCSI-2/ SCSI-3 mod e.

T able 6: Com m ands supported by Barracuda 50 family drives

Command name

Command code

Supported by Barracuda 50

Change definition 40h Y Compare 39h N Copy 18h N Copy and verify 3A h N Format unit [1] 04h Y Block Forma t N Bytes from index Y Physical sector format Y DPRY bit supported Y DCRT bit supported Y STPF bit supported Y IP bit supported Y DSP bit supported Y IMMED bit supported Y VS (vendor specific) N Inquiry (see Table 7 for Inquiry data) 12h Y

Date code page (C1h) Y Device Behavior page (C3h) Y Firmware numbers page (C0h) Y Implemented operating def page (81h) Y Jumper settings page (C2h) Y Supported Vital product data page (00h) Y

Unit serial number page (80h) Y Lock-unlock cache 36h N Log select 4Ch Y

DU bit N

DS bit Y

TSD bit Y

ETC bit N

TMC bit N

LP bit N Log sense 4Dh Y

Cache statistics page (37h) Y

Non-medium error page (06h) N

Pages supported list (00h) Y

Power-on ti me page (3Eh) Y

Read error counter page (03h) Y S.M.A.R.T. status log page (2Fh) Y S.M.A.R.T. attitude log page (02h) Y

Veri fy error counter page (05h) Y

Write error counter page (02h) Y Mode select (same pages as Mode Sense command) 15h Y [2]

Barracuda 50 Product Manual, Rev. C 43

T able 6: Com m ands supported by Barracuda 50 family drives (Continued)

Command name

Command code

Supported by Barracuda 50

Mode select (10) 55h Y

Capacity Programming Y

Mode sense 1Ah Y [2]

Caching parameters page (08h) Y Control mode page (0Ah) Y Disconnect/reconnect (02h) (DTDC, DIMM not used) Y Error recovery page (01h) Y Format page (03h) Y

Information exceptions control page (1Ch) Y

Notch and Partition Page (0Ch) N Power condition page (1Ah) Y Rigid disc drive geometry page (04h) Y Unit attention page (00h) Y

Verif y error recovery page (07h) Y Xor Control page (10h) N Mode sense (10) 5Ah Y Prefetch 34h N Read 08h Y Read buffer (modes 0, 2, 3 supported) 3Ch Y Read c apacity 25h Y Read defect data 37h Y Read extended 28h Y DPO bit supported Y FUA bit supported Y Read long 3Eh Y Reassign blocks 07h Y Rebuild 81h N Receive diagnostic results 1Ch Y

Supported diagnostics pages (00h) Y

Translate page (40h) Y Regenerate 82h N Release 17h Y Release (10) 57h Y Request sense 03h Y

Actual ret ry count bytes Y

Deferred error supported Y

Extended sense Y

Field pointer bytes Y Reserve 16h Y

3rd party reser ve Y

Extent reservation N Reserve (10) 56h Y 3rd pa rty reserve Y Extent reservation N Rezero unit 01h Y Search data equal 31h N Search data high 30h N

44 Barracuda 50 Product Manual, Rev. C

T able 6: Com m ands supported by Barracuda 50 family drives (Continued)

Command

Command name

code

Search data low 32h N Seek 0B h Y Seek extended 2Bh Y Send diagnostics 1Dh Y

Supported diagnostics pages (00h) Y

Translate page (40h) Y Set limits 33h N Start unit/stop unit (spindle ceases rotating) (1Ch) 1Bh Y Synchronize cache 35h Y Test unit ready 00h Y Verify 2Fh Y DPO bit supported Y BYTCHK bit supported Y Write 0Ah Y Write and verify 2Eh Y DPO bit supported Y BYTCHK bit supported Y Write buffer (modes 0, 2, supported) 3Bh Y Firmware download option (modes 5, 7 supported) [3] Y Write extended 2Ah Y DPO bit supported Y FUA bit support Y Write long 3Fh Y Write same 41h Y XDRead 52h N XDWrite 50h N XDWrite extended 80h N XPWrite 51h N

Supported by Barracuda 50

[1] The drive can format to any even num ber of bytes from 512 to 2,048. [2] Table 9 shows how individual bits are set and which are changeable by the host.

WARNING:

[3]

A power loss during flash programming can result in firm ware corr uption. Thi s usu ally makes

the drive inoperable.

Barracuda 50 Product Manual, Rev. C 45

Table 7 lists the Standard Inquiry command data that the drive should return to the initiator per the format given in the Inquiry Command section of the SCSI Interface Product Manual, part number 77738479.

T able 7: Barracuda 50 family drive Standard Inquiry data

Bytes Data (HEX)

0-15 00 00 [02]1[12]28B 00 01 3E 53 45 41 47 41 54 45 20 VENDOR ID

16-31 53 54 [31] [35] [ 30] [31] [37] [36] [4C] [43] 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 [31] COPYRIGHT

112-127 [39] [39] [39] 128-143 72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20

[]

01 means SCSI-1 implemented;

20 53 65 61 67 61 74 65 20 41 6C 6C 20 NOTICE

20 20 20 20 20 20 PRODUCT ID

02 means SCSI-2/SCSI-3 implemented. Default is 02.

[]

The drive can be changed between these two configurations: 01 means response data in SC SI-1 form at and has co mpa tib ilit y with Com m on Co mm and S et data. 02 means response data in SCSI-2/SCSI-3 format (default is 02).

R# Four ASCII d igits represent ing the last four digits of the product Firmware Rele ase num ber. This informa-

tion is also given in th e Vital Product Dat a page C0h, t ogether with ser vo RAM and ROM rel ease numbers.

S# Eight ASCII digits represe nting the eight digits of the product serial number.

Bytes 18 through 25 reflect model of drive. Shown here are hex value s for Model ST150176LC.

[]

The hex values for bytes 24 and 25 for the various models are listed below.

LW LC

4C 57 4C 43

[]

9.3.1 Inquiry Vi tal Product data

Instead of the standard Inquiry data shown in Table 7, the initiator can request several Vital Product Data pages by setting the Inquiry com mand EVPD bit to one. The SCSI Interface Product Manual, part number 77738479 lists the Vital Product Data pages and describes their formats. A separate Inquiry command must be sent to the drive for each V ital Prod uct Data page the initiator wants the drive to send back.

Table 8 shows the Vital Product Data pages for the drives of this product manual. “Y” means reporting that particular parameter is supported, but it may be differen t for each drive.

46 Barracuda 50 Product Manual, Rev. C

T able 8: Vital product dat a pages

Byte Page Supported

Unit serial number page 80h

0 Peripheral qualifier/periphe ral device type — 1 Page code number 80 2 Res erved 00 3 Page length 08 4-11 Product serial number Y

Impleme nted operat i ng definition page 81h

0 Peripheral qualifier/periphe ral device type — 1 Page code number 81 2 Res erved 00 3 Page length 03 4 SAVI MP=0, current operating definition Y 5 SAVI MP=0, default operating definition Y 6 S AVIMP=0, supported operating definit ion Y 7 S AVIMP, suppor t ed operating co ndition Y

Firmware numbers page C0h

0 Peripheral qualifier/periphe ral device type — 1 Page code number C0 2 Res erved 00 3 Page length 10 4-7 Controller firmware number Y 4-11 S CS I fir mware release number Y 8-11 B oot firm ware number Y 12-19 Ser vo RAM release number Y 12-15 Ser vo fir mware number Y 20-27 Ser vo ROM release number Y 28-31 Ser vo RAM release date Y 32-35 Ser vo ROM release date Y

Data code page C1h

0 Peripheral qualifier/periphe ral device type Y 1 Page code number C1 2 Res erved 00 3 Page length 03 4Year Y 5Week Y 4-6 DCD data, MMDDYY Y

Jum per settings page C2h

0 Peripheral qualifier/periphe ral device type Y 1 Page code number C2 2 Res erved 00 3 Page length 02 4 Motor start, parity enable, SCSI ID, delay ed

Y motor start, motor start, write protect, parity enable, SCSI ID

5 Terminator enable N

Barracuda 50 Product Manual, Rev. C 47

9.3.2 Mode Sense data

The Mode Sense com mand provides a me ans for the drive to repor t its operating parameters to the in itiator. The drive maintains four sets of Mode paramete rs, Default values, Saved values, Current values and Changeable values.

Default values are hard coded in the drive firm ware that is stored in f lash EPROM no nvolatile memory on t he drive PCB. Default valu es can be changed o nly by downloading a complete set of new firmware into the flash EPROM. An initiator can request and receive from the drive a list of Default values and use those in a Mode Select command to set up new Current and Saved values, where the val ues are changeable.

Saved valu es are stored on t he disk media using a M ode Select command. Only parameter values that are allowed to be changed can be changed by this method. See “Changeable values” defined below. Parameters in the Saved values list that are not changeable by the Mode Select command get their values from the Default values storage.

Current values are volatil e values currently being used by the drive t o control its operation. A Mode Select command can be used to c han ge t hese values (only thos e that are changeable). Originally, they are installed from Saved or Default values after a power on reset, hard reset, or Bus Dev ice Reset mess age.

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 Mod e S elect c om m and. A “one” allows a change to a corresponding bit; a “zero” allows no change. For example, in Table 9 refer to Mode page 01, in the row entitled “CHG”. These are hex numbers representing the changeable values for Mode page 01. Note that bytes 04, 05, 06, and 07 are not changeable, because those fields are all zeros. If some changeable code had a hex value EF, tha t equates to the binary p atter n 1110 1111. If there is a zero in any bit position in the field, it mean s that bit is not changeable. Bits 7, 6, 5, 3, 2, 1, and 0 are changeable, because those bits are all ones. Bit 4 is not changeable.

Though the drive always reports non-zero values in bytes 00 and 0 1, those pa rticular bytes are never changeable.

The Changeable values list can only be changed by downloading new firmware into the flash EPROM. On standard OEM drives the Saved values are taken from the Default values list and stored into the Saved val-

ues storage location on the media prior to shipping. When a drive is powered up, it takes Saved values from the medi a and sto res them to the Current values stor-

age in volatile memory. It is not possible to change the Current values (or the sav ed values) with a Mode Select command before the drive is up to speed and is “ready.” An attempt to do so results in a “Check Condition” status being returned.

Note.

Because there may be 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 ex actly match thos e of some drives.

48 Barracuda 50 Product Manual, Rev. C

The following tables list the values of the data bytes returned by the drive in response to the Mode Sense command pages for SCSI-2/SCSI-3 implementation (see the SCSI Interface Product Manual, P/N 7773847 9).

Definitions:

SAV = Saved value DEF = Default value. Standard drives are shipped configured this way. CHG = Changeable bits; indicates if current and saved values are changeable.

Table 9: Mode sense data, ST150176 val ues (SCSI-2/3 implementati on)

Bytes 00010203040506070809101112 1314151617181920212223

Mode Sense Data

Mode Page

01 SAV 01 CHG 81 0A FF FF 00 00 00 00 FF 00 FF FF

02 SAV 82 0E 80 80 00 0A 00 00 00 00 00 00 00 00 00 00 02 CHG 82 0E FF FF 00 00 00 00 00 00 00 00 87 00 00 00

03 SAV 83 16 04 4C 00 00 00 02 00 00 01 71 02 00 00 01 00 48 00 38 40 00 00 00 03 CHG

04 SAV 84 16 00 2E F8 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1C 09 00 00 04 CHG

07 SAV 87 0A 00 0B A8 00 00 00 00 00 FF FF 07 CHG 87 0A 0F FF 00 00 00 00 00 00 FF FF

08 SAV 88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00 08 CHG 88 12 B5 00 00 00 FF FF FF FF 00 00 A0[1] FF 00 00 00 00 00 00

0A SAV 8A 0A 02 00 00 00 00 00 00 00 00 00 0A CHG 8A 0A 03 F1 00 00 00 00 00 00 00 00

9F 00 10 08 05 D2 B0 3B 00 00 02 00

<------------ ------------ ------Mode Page Headers and Parameter Data Bytes---------- ------------------>

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

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

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

1A SAV 9A 0A 00 03 00 00 00 01 00 00 00 04 1A CHG 9A 0A 00 03 00 00 00 00 00 00 00 00

1C SAV 9C 0A 00 00 00 00 00 00 00 00 00 01 1C CHG 9C 0A 8D 0F FF FF FF FF FF FF FF FF

00 SA V 80 02 00 00 00 CHG 80 02 77 40

Read capacity data

05 D2 B0 3A 00 00 02 00

[1] Though byte 12, bit 7 (A0) is shown as chan geable, the FSW function governed by that bit is not imple-

mented by this drive.

Barracuda 50 Product Manual, Rev. C 49

9.4 SCSI bus conditions and miscellaneous features supported

Asynchronous SCSI bus conditions suppor ted by the drive are listed below. These con ditions cause the SCSI device to perform certain ac tions and can alter the SCSI bus phas e sequence. Other miscellaneou s operating features supported are also listed here. Refer to the SCSI Interface Product Manual, par t number 77738479, for details.

Table 10: SCSI bus condi tions and other miscellaneous features

Supported Conditions or feature

Y 68 and 80 pin interface connectors Y 1,024K data buffer N Adaptive caching Y Adaptive read look-ahead Y Arbitrating system Y ASYNC burst rate of 5 Mbytes/sec. Y Asynchronous data transfer N Asynchronous event notificati on Y Attention condition Y Audio video recovery scheme N Automatic adaptive cache Y Capacity programming Y Command overhead less than 500 USEC, typ. Y Contingent alleg iance condition Y Deferred error handling Y Del ayed m otor s tar t Y Differ enti al inte rf ace cir cuits avai lab l e (low v olt age diff er ential in LVD mode) Y Differential SCSI Y Disconnect/reconnect Y Embedded servo Y Fas t SCSI, 10 Mb ytes/sec. Y Firmware downloadable via SCSI inter face Y Flag and link bits in control byte supported Y Format pr ogress indication Y Full autom atic read and write reallocation Y Hot plugging, with bus active Y Immediate status on Format Unit command Y Immediate status on Start/Stop command Y Immediate status on Synchronize cache Y Lin ke d co mma nd s—customer unique options Y Motor start enable Y Multi-initiator Y Multi-mode drivers/receivers (sin gle-ended/differential ) Y Par am eter rounding Y Power management, SCSI-3 Y Queue tagging (up to 64 Que tag s supported) Y Read look ahead crossing cylinder boundaries N Relative addressing—customer unique options Y Reporting actual retry count in Ext ended Sense bytes 15, 16 and 17. Y Reset condition

50 Barracuda 50 Product Manual, Rev. C

Supported Conditions or feature

Y RPS (rotationa l position seek/sort) N S2 bi t SCA-2 SCA connector (opti onal) Y SCSI ID accessibility to front end (J6) Y SCSI-3 SPI compliant Y SCAM PnP lev el 2 compl iant Y Variable Sector size, 512 to 2,048 i n 4-byte multiples Y Segmented caching Y (interface only) S.M.A.R.T. (Self-Monit ori ng Analysis and Reporting Technology ) N Spari ng scheme per cylinder N Spari ng scheme per track Y Sparing scheme per volume Y Sparing scheme per zone N (always strict) Strict bit support Y Sustained transfer rate of 3 Mbytes/sec.—single-ended N Sync spindles—rotational posit ion offset N Synchronized (locked) spindle operation Y Synchronous data transfer Y Tagged command queuing 64 deep Y Target initiated SDTR N TTD/CIOP Y Ultr a SCSI, 20 Mbytes/sec. Y Ultr a SCSI, 40 Mbytes/sec. Y Write protected N Zero latency read

Supported Status supported

Y Good Y Check condition Y Condition met/good YBusy Y Intermediate/good Y Intermediate/condition met/good Y Reservation conflict Y Queue full N Auto contingent allegiance active

Barracuda 50 Product Manual, Rev. C 51

9.5 Synchronous data transfer

Table 11 and Section 9.5.1 list Synchronous Data transfer periods supported by the drive.

9.5.1 Synchronous data transfer periods supported

The data transfer period to be used by the drive and the initiator is e stablished by an exchange of messages during the Message P hase of operation. See the sec tion on message protocol in the SCSI Interface Product Manual, part number 77738479 .

Table 11: Synchronous dat a transfer periods

M (decimal)

Transfer period (nanoseconds)

10 25

Transfer rat e (megatransfers/second)

40.0 12 50 20.0 25 100 10.0 50 200 5.0

1. This transfer rate is only allowed when using the LVD interface.

9.5.2 REQ/ACK offset

The maximum value supported by the Barracuda 50 family drives for REQ/ ACK offset is 15 (0Fh).

9.6 Physical interface

Figures 15 and 16 s how the locations of the dr ive physical interface components for the var ious m odel s of t he drive. Shown are the locations of the DC power connector, the SCSI interface connector, and the drive select and option select headers.

Details of the physical, electrical and logical characteristics are g iven in sections following, while the SCSI operational aspects of Seagate drive interfaces are given in the SCSI Interface Product Manual, part number

77738479. This section describes the connectors, cables, signals, terminators and bus timing of t he DC and SCSI I/O

interface. See Section 9.8 and Section 9.9 for additional terminator information.

9.6.1 DC cable and connector

The drive receives DC power through a 4 pin connector (see Figure 15 for pin assignment) mounted at the rear of the main PCB. Recomm ended par t numbers of the mating conn ector are listed below, but equivalent parts may be used.

Typ e of cabl e Connector Contacts (20-14 AWG)

14 AWG M P 1-480424-0 AMP 60619-4 (Loose Piece)

AMP 61117-4 (Strip)

52 Barracuda 50 Product Manual, Rev. C

Pin 1

Pin 1A J1

Pin 1

68 Pin

SCSI I/O

Connector

1P 2P 3P 4P

Pin 1P

Power

+12V +12V ret + 5V ret + 5V

Pin 1A

J1-DC Power

1P2P3P4P

PCB

Figure 15. Model “LW” drive physical interface (68 pi n J1 SCSI I/ O connector)

80-pin

SCSI I/O

Connector

in 1

Note: See Tables 14 and 16 for DC power pin assignm ents.

Figure 16. Model “LC” drive physical interface (80 pin J1 SCSI I/O connector)

Barracuda 50 Product Manual, Rev. C 53

9.6.2 SCSI interface physical description

The drive models described by this product manual support the physical interface requirements of the SCSI-3 Parallel Interface-2 (SPI-2) and EPI standards a s defined in American Na tional Standard do cuments X3T10/ 1142D and X3T10/1143D, and operate compatibly at the interface with devices that only support earlier singleended SCSI-2 and SCSI-3 standards . It should be noted that this is only true if t he systems engineering has been correctly done, and if earlier SCSI-2 and SC SI-3 devices respo nd in an a ccep table manne r (per applicable SCSI Standards) to reject newer SCSI-3 protocol extensions that they don’t support. Low voltage differential (LVD) circuits are not compatible with high voltage differential (HVD).

The family of drives in this manual supports the single-ended and low voltage differential physical interconnects (hereafter referred to as SE and LVD, respectively) as described in the ANSI SPI-2 and EPI standards.

The drives typically operate on a daisy-chain interface in which other SCSI devices are also operating. Devices on the daisy chain must all operate in the same mode, either SE or LVD, but not a mixture of these. On the interface daisy chain, all signals are common between all devices on the chain, or bus, as it is also c al led. This daisy chain of SCSI devices must be te rminated at both ends with the proper impe dance in order to operate correctly. Inter me diate S CSI devices shall not be ter m inated. Mode ls “LC” and “LW” have no onboard termi nation circuits. Some type of external termination circuits must be provided for these drives by the end user or designers of the equipment into which the drives will be integrated. See SPI-2 and EPI standards for the maximum number of devices that can successfully operate at var ious interface transfer rates on SE and LVD daisy chains.

“LC” model drives plug into PC B or bulkhead con necto rs in the Hos t . They may be conne cted in a daisy-chain by the host backplane wiring or PCB circuit runs that have adequate DC current carrying capacity to suppor t the number of drives plugged into the PCB or bulkhead connectors. A single 80 pin I/O connector cable cannot support the DC current needs of several drives, so no daisy cha in cables beyond the bulkhead connectors should be used. A single drive connected via a cable to a host 80 pin I/O connector is not recommended.

Table 12 shows the interface transfer rates supported by the various drive models defined in this manual.

Table 12: Interface transfer rates supported

Interface typ e / drive models

Maximum transfer rate Asynchronous Fast-5 Fast-10 Fast-20 Fast-40

SE “LC,” “LW” yes yes yes yes no LVD “LC,” “LW” yes yes yes yes yes

9.6.3 SCSI interface cable requirements

The characteristics of cables used to connect SCSI -3 parallel interface devices are discussed in detail in section 6 of ANSI Standard X3T10/11 42D. The cable characteristics that must be considered when interconne cting the drives described in this manual in a SCSI-3 parallel, daisy-chain interconnected system are:

• characteristic impedance (see section 6.1)

• propagation delay (see section 6.1)

• cumulative length (see sections 6.4 and 6.5)

• stub length (see sections 6.4 and 6.5)

• device spacing (see sections 6.4 and 6.5)

To minimize discontinuances and signal reflections, cables of different impedances should not be used in the same bus. Implementations may require trade-offs in s hielding effectiveness, cable length, number of loads and spacing, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance m ismatch mus t be carefully considered. Proper impedance matching is especially important in order to maintain adequate margin at FAST-20 and FA ST-40 SCSI transfer rates.

Note.

For LVD operation, twisted pair cables are recommended. For LVD Fast-40 operation, twisted pair cables are strongly recommended. For Fast-80 operation, twisted pair cables are required.

54 Barracuda 50 Product Manual, Rev. C

For “LC” model:

The 80 pin connector option is intended for use on drives that plug directly into a PCB or wall/bracket mounted connector in the host equipment. In such installations, all backplane wiring segments are subject to the electromagnetic concepts p resented in Standard X3 T10/1142D, section 6. For “LC” mo del drives, installations with connectors on cables are not recommended.

9.6.4 Mating connectors

Part numbers for the different type connectors that mate with the various Barracuda 50 I/O connectors are given in the sections following.

9.6.4.1 Mating connectors for “LW” models

The nonshielded cable connector shall be a 68 conductor connector consisting of two rows of 34 male contacts with adjacent contacts 0.050 inch (1.27 mm) apart.

Recommended mating flat cable connector part numbers are: Amp Model 786096-7 Female, 68-pin, panel mount Amp Model 786090-7 Female, 68-pin, cable mount Amp Model 749925-5 (50 mil conductor centers, 28 or 30 AWG wire)

Use two, 34 conductor, 50 mil center flat cable with this connector. This type connector can only be used on cable ends. [1]

Amp Model 88-5870-294-5 W/O Strain Relief (25 mil conductor centers, 30 AW G wire).

Use either on cable ends or in cable middle section for daisy-chain

installat ions [1]. Amp Model 1-480420-0 Power connector 4 circuit housing Berg 69307-012 12-position, 2 x 6, 2 mm rec epta cle housing

[1] See Figure 17. The drive device connector is a nonshielded 68 conductor connector consist ing of two rows of 34 female pins

with adjacent pins 50 mils apart. The connector is keyed by means of its shape (see Figure 18).

9.6.4.2 Mating connectors for “LC” models

The nonshielded connector shall be an 80 conductor connector consisting of two rows of 40 contacts with adjacent contacts 50 (1.27 mm) mils apart (see Figure 19). I/O conne ction using a cable is not recommended. The length and size of the host equipment DC power carrying conduc tors from the DC power source to the host equipment 80 pin disk drive interface connector(s) should be strictly designed according to proper power transmission design concepts. No possibi lity for the equipment user to at tach an 80 pin cable/connector sh ould be allowed, since the length of the DC power carrying conductors could not be controlled and therefore could become too long for safe power transmissi on to the drive. Daisy-chain 80 conductor cables should especially not be allowed, since the power-carrying conductors on the 80 conductor interface were not intended to support a series of drives.

To insure that both drive connector and host equipment mating connector mate proper ly, both drive connector and host equipment mating connect or must meet th e provisions of “SFF-8 046 S pec ification for 80-pin connector for SCSI Disk Drives.”

Barracuda 50 Product Manual, Rev. C 55

Recommended mating 80-position PCB mount connectors:

Straight-in connect or Hot plug version (with ground guide -pi n)

Seagate P/N: 77678703 Amp US P/N: or Amp US P/N: or

2-557103-1 94-0680-02-1 2-557103-2 94-0680-02-2

787311-1 wit h polar ization 787311-2 wit hout polar izat ion

Amp Japan P/N: 5-175475-9

Righ t -angle to PCB co nnectors

Seagate P/N: 77678559 Amp US P/N: 2-557101-1 Amp Japan P/N: 5-175474-9 For additional information call Amp. FA X ser vi ce at 1-800-522-6752.

“LW” Model

Drive

Terminator

[6]

SCSI ID 1

[2]

SCSI ID 0

[2]

[7]

2 through X

SCSI devices [4]

Pin 1

(check your

adapter for Pin 1 location)

SCSI ID 7 [5]

[1]

Host Adapter

PCB

[3]

[1] Closed end type 68 pin connector used. Extern al term inator required. [2] Open end type (in-line application) connector used. No terminator required. [3] Host need not be on the end of the daisy-chain. Another device can be on the end with the terminator, the

host having no terminator.

[4] Total interface cable length must not exceed that specified in ANSI Standard X3T10/1142D (including host

adapter/initiator). The cable length restriction limits the total number of devices allowed. [5] SCSI ID7 has highest arbitration priority; priority is ID7 to ID0, then ID15 to ID8 (ID 8 very lowest). [6] Last drive on the daisy chain.

Figure 17. SCSI daisy chain interface cabling for “LW” model drives

56 Barracuda 50 Product Manual, Rev. C

3.650±.005

.100

(2.54)

.155

.050

.022

.346

1.650 .3937 .600 .0787 .200

.519

(13.18)

1.816

(46.13)

Position 1

.315

(8.00)

.270

.020 .047

.60

(15.24)

Pos.

.20

(5.08)

.085

(2.16)

typ

x 45° chamfer typ

.315 ± .010

(8.00)

.218

(5.54)

Pos. 68

.050

(1.27)

1.650

(41.91)

.980

(24.89)

1.368

(37.74)

Pos. 35

.0787 (2.00)

Pos.

(19.48)

3.650

(92.71)

Figure 18. Nonshielded 68 pin SCSI device connector used on “LW” mode l s

.840 ± .005

(21.34)

.767

+.001 –.002

dia

.083 (2.1)

Trifurcated Pins (4 places)

Barracuda 50 Product Manual, Rev. C 57

7.00

(.276)

Pin 1

0.15

62.15

(2.447)

0.15

Housing

MYM

–Y–

± 0.15 (± .005)

MYM

57.87

(2.278)

Grounding

0 –0.15 + .000

[

– .006

Pins

[

of Datum Y

12.70 (.500)

2.15±0.10 2 places

End View

Front View

Insert mating I/O connector

Top View

Contact

0.50

(.020)

0.3

(.012)

1.27

(.05)

Typ

MYM

Pin 1 Pin 40

Pin 41 Pin 80

of Datum Y

Grounding

Pins

Back View

Figure 19. Nonshielded 80 pin SCSI “SCA-2” connector, used on “WC” and “LC” models

Notes [ ]:

See page following Table 16.

58 Barracuda 50 Product Manual, Rev. C

T able 13: LW 68-conductor single-ended (SE) P cable signal/pin assignments [13]

Note.

Signal name [1]

A minus sign preceding a signal name indicates that signal is active low.

Connector contact number [3]

Signal name [1 ]

GND 1 35 –DB12 GND 2 36 –DB13 GND 3 37 –DB14 GND 4 38 –DB15 GND 5 39 –DBP1 GND 6 40 –DB0 GND 7 41 –DB1 GND 8 42 –DB2 GND 9 43 –DB3 GND 10 44 –DB4 GND 11 45 –DB5 GND 12 46 –DB6 GND 13 47 –DB7 GND 14 48 –DBP GND1549GND GND1650GND TermPwr1751TermPwr TermPwr1852TermPwr Reserved 19 53 Reserved GND2054GND GND 21 55 –ATN GND2256GND GND 23 57 –BSY GND 24 58 –ACK GND 25 59 –RST GND 26 60 –MSG GND 27 61 –SEL GND 28 62 –C/D GND 29 63 –REQ GND 30 64 –I/O GND 31 65 –DB8 GND 32 66 –DB9 GND 33 67 –DB10 GND 34 68 –DB11

Notes [ ]:

See page following Table 16.

Barracuda 50 Product Manual, Rev. C 59

T able 14: LW 68-conductor L VD P cable signal/pin assignments [13]

Note.

A minus sign preceding a signal name indicates that signal is active low.

Connector contact number [3]

Signal name [1]

Connector contact number [3]

Signal name [1 ]

+DB12 1 35 –DB12 +DB13 2 36 –DB13 +DB14 3 37 –DB14 +DB15 4 38 –DB15 +DBP1 5 39 –DBP1 +DB0 6 40 –DB 0 +DB1 7 41 –DB 1 +DB2 8 42 –DB 2 +DB3 9 43 –DB 3 +DB4 10 44 –DB4 +DB5 11 45 –DB5 +DB6 12 46 –DB6 +DB7 13 47 –DB7 +DBP 14 48 –DBP Ground 15 49 Ground DIFFSNS [8] 16 50 Ground TermPwr1751TermPwr TermPwr1852TermPwr Reserved 19 53 Reserved Ground 20 54 Ground +ATN 21 55 –ATN Ground 22 56 Ground +BSY 23 57 –BSY +ACK 24 58 –ACK +RST 25 59 –RST +MSG 26 60 –MSG +SEL 27 61 –SEL +C/D 28 62 –C/D +REQ 29 63 –REQ +I/O 30 64 –I/O +DB8 31 65 –DB8 +DB9 32 66 –DB9 +DB10 33 67 –DB10 +DB11 34 68 –DB11

Notes [ ]:

See page following Table 16.

60 Barracuda 50 Product Manual, Rev. C

Table 15: LC 80-pin single-ended (SE) I/O connector pin assignments [13]

Note.

Signal name [1]

A minus sign preceding a signal name indicates that signal is active low.

Connector contact number [3]

Signal number [3]

Contact name[1]

12 V CHARGE 1 41 12 V GND 12 V 2 42 12 V GND 12 V 3 43 12 V GND 12 V 4 44 MATE D 1 NC [10] 5 45 NC [10] NC [10] 6 46 DIFFSNS [8]

–DB11 7 47 GND –DB10 8 48 GND –DB9 9 49 GND –DB81050GND –I/O1151GND –REQ1252GND –C/D1353GND –SEL1454GND –MSG1555GND –RST1656GND –ACK1757GND –BSY1858GND –ATN1959GND –DBP2060GND –DB72161GND –DB62262GND –DB52363GND –DB42464GND –DB32565GND –DB22666GND –DB12767GND –DB02868GND –DP12969GND –DB15 30 70 GND –DB14 31 71 GND –DB13 32 72 GND –DB12 33 73 GND

+5 V3474MATED 2 +5 V35755 V GND +5 V36765 V GND NC [10] 37 77 ACTIVE LED OUT [4] [9] RMT- S TART [5] [9] 38 78 D LYD-STA RT [6 ] [9] SCSI ID (0) [7] [9] 39 79 SCSI ID (1) [7] [9] SCSI ID (2) [7] [9] 40 80 SCSI ID (3) [7] [9]

Notes [ ]:

See page following Table 16.

Barracuda 50 Product Manual, Rev. C 61

T able 16: LC 80-pin single-ended (LVD) I/O connector pin assignments [13]

Note.

A minus sign preceding a signal name indicates that signal is active low.

Connector Signal name [1]

contact

number [3]

Signal number [3]

Contact name[1]

12 V CHARGE 1 41 12 V GND 12 V 2 42 12 V GND 12 V 3 43 12 V GND 12 V 4 44 MATE D 1 NC [10] 5 45 NC [10] NC [10] 6 46 DIFFSNS [8]

–DB11 7 47 +DB11 –DB10 8 48 +DB10 –DB9 9 49 +DB9 –DB81050+DB8 –I/O1151+I/O –REQ1252+REQ –C/D1353+C/D –SEL1454+SEL –MSG1555+MSG –RST1656+RST –ACK1757+ACK –BSY1858+BSY –ATN1959+ATN –DBP2060+DBP0 –DB72161+DB7 –DB62262+DB6 –DB52363+DB5 –DB42464+DB4 –DB32565+DB3 –DB22666+DB2 –DB12767+DB1 –DB02868+DB0 –DBP1 29 69 +DP1 –DB15 30 70 +DB15 –DB14 31 71 +DB14 –DB13 32 72 +DB13 –DB12 33 73 +DB12

+5 V3474MATED 2 +5 V35755 V GND +5 V CHARGE 36 76 5 V GND NC [10] 37 77 ACTIVE LED OUT [4] [9] RMT_ START [5] [9 ] 38 78 D LYD_S TART [6] [9] SCSI ID (0) [7] [9] 39 79 SCSI ID (1) [7] [9] SCSI ID (2) [7] [9] 40 80 SCSI ID (3) [7] [9]

Notes [ ]

: See page following this table.

62 Barracuda 50 Product Manual, Rev. C

Notes [ ] for Tables 13 through 16.

[1] See Section 9.7 for detailed electrical characteristics of these signals. [2] The conductor numbe r refers to the conductor position w hen using 0.025-inch (0.635 mm) cent erline flat

ribbon cable. Other cables types may be used to implement equivalent contact assignments. [3] Connector contacts are on 0.050 inch (1.27 mm) centers. [4] Front panel LED signal; indicates drive activity for host front panel hard drive activity indicator. [5] Asser ted by host to enable Motor Start option (enables start ing motor via SCSI bus command). [6] Asserted by host to enabl e Del ayed Motor Start option (motor starts at power on or after a delay of 12 sec-

onds times drive ID). This and [3] above are mutual ly exclusive options. [7] Binary code on A3, A2, A1 and A0 asser t ed by host to set up SCSI bus ID in drive. [8] GND provides a means for differential devices to detect the presence of a single ended device on the bus.

Drive will not operate I/O bus at Ultra2 SCSI data rates if this is grounded. [9] Signals [4] through [7] are used in place of installing jumpers and cables on option select connectors J2

and J6. See Section 8.1.1 notes. [10] “NC” means no connection. [11] The conduc tor number refers to the conductor position (right to left in Figu re 17) when using 0.050 inch

(1.27 mm) centerline fl at ribbon cable. Other cable types may be used to impleme nt equivalent contact

assignments. [12] Connector contacts are on 0.100 inch (2.54 mm) centers. [13] 8 bit devices which are connected to the 16 data bit LVD I/O shall leave the following signals open: –DB8,

–DB9, –DB10, –DB11, –DB12, –DB13, –DB14, –DB15, and –DBP1.

8 bit devices which are connected to the 16 data bit single-ended (SE) I/O shall have the followi ng signals

open: DB8, –DB9, –DB10, –DB11, –DB12, –DB13, –DB14, –DB15, and –DBP1.

All other signals should be connected as shown.

Barracuda 50 Product Manual, Rev. C 63

9.7 Electrical descr iption

“LC” models use the single connection attachment (SCA) connector. This 80-pin connector is designed to plug directly into a back panel or plane. No external cables are required. Active terminators on the ba ck panel must be provided by the user. This connector is not recommended where cabling is required.

“LC” and “LW” models are Multimode drives. That is, their I/O circuits can operate as either single-ended or low voltage differential drivers/receivers (selectable using the I/O “DIFFSNS” line). They require external terminators. See Section 9.7.1 for additional information on these models.

See ANSI Standard X3T10/1142D for detailed electrical specifications.

9.7.1 Multimode—SE or LVD alternative

“LW” and “LC” models have I/O circuits that can operate either in single-ended (SE) or low voltage differential mode (LVD). Wh en the interface “DIFFSNS” line is between 0 V an d .6 V, the d rive interface circuits operate single-ended and up to and including 20 M transfers/s (Fast-20 or Ultra-1 SCSI). When “DIFFSNS” is between +0.7 V and +1.9 V, t he drive interface circuits operate low voltage differential and up to and including 40 M transfers/s or less (Fast-40 or Ultra-2 SCSI). This arrangement is not intended to allow dynamically changing transmission modes, but rather to prevent incom patible devices from attempting to interoperate. Multimode I/O circuits used by “LC” and “LW” devices do not operate a t high voltage differential levels and should never be exposed to high voltage differential environments unless the common m ode voltages in the environment are controlled to safe levels for single-ended and low voltage differential devices (see the ANSI SPI-2 specification X3T10/1142D).

Multimode signals

Multimode circuit SE alternative logic sense and signal level characteristics are described as follows: Vil (low-level input voltage) = 1.0 V maximum (signal true); minimum = Vss – 0.5 V

Vih (high-level input voltage) = 1.9 V minimum (signal false); maximum = Vdd +0.5V Vihys (Input Hysteresis) = 425 mV minimum

Multimode circuit LVD alternative signal characteristics are not the same as high voltage differential signals (HVD). This drive does not support HVD. T he SCA-2, 80-pin connector signal/pin assignments are shown in Table 16. “LC” and “LW” m odel drives do not have onboard termin ators. The M ul timode signal lines (either S E or LVD) should be terminated with 110 ohm active terminator circuits at each end of the total cable. Termination of the I/O lines must be provided for by the Host equipment designers or end users.

The SE and differential alternatives are mutually exclusive.

Output characteristics

Each LVD signal (V

) driven by LVD interface drivers shall have the following output characte ristics when m ea-

sured at the disc drive connector: Steady state Low level output voltage* = –.95 V = < V

Steady state High level output voltage* = –.95 V = < V Differential voltage = +

0.6 V minimum with common-mode voltage ranges 0.700 V = < Vcm = < 1.800 V

= < –1.55 V (signal negation/logic 0)

= < 1.55 V (signal assertion/logic 1)

*These voltages shall be measured between the output terminal and the SCSI device’s logic ground reference. The output characteristics shall additionally conform to EIA RS-485.

64 Barracuda 50 Product Manual, Rev. C

LVD Differential

Driver

Signal +

Signal –

1.55V

.95V +15ma

–15ma

= True / Logic 1 / Assertion

LVD Differential

Driver

Signal +

Signal –

| = .6V

.95V

1.55V –15ma

+15ma

= False / Logic 0 / Negation

Figure 20. LVD output signals

Input characteristics

Each signal (Vs) received by LV D interface receiver circuits shall have the following input characteristics when measured at the disk drive connector:

Steady state Low level output voltage* = 0.030 V = < V Steady state High level output voltage* = –3.6 V = < V Differential voltage = +

0.30 V minimum with common-mode voltage ranges 0.700 V = < Vcm = < 1.800 V.

= < 3.6 V (signal negation/logic 0)

= < –0.030 V (signal assert ion/log ic 1)

(X3T10/1142D revision 13, p. 152) *These voltages shall be measured between the output terminal and the SCSI device’s logic ground reference. Input characteristics shall additionally conform to EIA RS-485-983.

VCCA VCCB

LVD Signal Drivers

LVD

Receiver

LVD Signal Drivers

Single Ended Receiver

Single Ended Negation Driver

Single Ended Assertion Driver

Single Ended Ground Driver

Single Ended Circuitry

Ground

Single Ended: LVD:

GND

+Signal

Figure 21. Typic al SE- LVD alternati ve transmitter receiver circuits

–Signal –Signal

Barracuda 50 Product Manual, Rev. C 65

9.8 Terminator requirements Caution:

These drives do not have onboard internal terminators. The user, systems integrator or host equipment manufacturer must provide a terminator arrangement external to the drive when termination is required. For LW dr ives, ter minator modules can be purchased that plug between t he SCSI I/O cable and the drive I/O connector or on the end of a shor t I/O cable stub extending past the last cable connector. LC drive s are designed to be plugged into a backpanel connector without cabling.

9.9 Terminator power “LW” model drives

You can configure terminator power in two di fferent way s. See Section 8.1 for illustrations that show how to place jumpers enabling each of the following terminator power configurations:

1. The external terminator accepts term ina tor power through SCSI bus pins 17, 18, 51, and 52.

2. Drive supplies terminator power to the SCSI bus on pins 17, 18, 51, and 52. SCSI devices providing terminator power (TERMPWR) must have th e following characteristics: 8-bit SCSI V TERM = 4.25 V to 5.25 V

800 mA minimum source drive capability

1.0 A maximum

16-bit SCSI V TERM = 4.25 V to 5.25 V

1,500 mA minimum source drive capability

3.0 A maximum

“LC” model drives

These drives cannot furnish terminator power because no conducto rs in the 80-pin I/O connector are devoted to terminator power.

66 Barracuda 50 Product Manual, Rev. C

9.10 Disc drive SCSI timing

Table 17 values are not current Barracuda 50 values, but are listed for informa tion only.

T able 17: Disc drive SCSI timing

Description

Waveform symbol [1]

Waveform table [1] T ypical timing

Target Select Time (no Arbitration) T00 N/A <1. 4 µs Target Select Time (with Arbitration) T01 4.5-1,2 1.93 µs Target Select to Command T02 4.5-1 3.77 µs Target Select to MSG Out T03 4.5-2 1.57 µs Iden tify MSG to Com mand T04 4.5- 3 3.36 µs Command to Status T05 4.5-5 Command Dependent Command to Data (para. In) T06 4.5-9 Command Dependent Command to Data (para. Out) T07 4.5-10 Command Dependent Command to Data (Write to Data Buffer) T08 4.5-10 Command Dependent Command to Disconnect MSG T09 4.5-6 Command Dependent Disconnect MSG to Bus Free T10 4. 5-6,14 0.52 µs Disconnect to Arbitration (for Reselect)

T11 4.5-6 Command Dependent

This measures disconnected CMD overhead Target win Arbitration (for Reselect) T12 4.5-7 3.00 µs Arbitration to Reselect T13 4.5-7 1.60 µs Reselect to Identify MSG In T14 4.5-7 1.39 µs Reselect Identify MSG to Status T15 4.5-8 Command Dependent Reselect Identify MSG to Data (media) T16 4.5-11 Command Dependent Data to Status T17 4.5-15 Command Dependent Status to Command Complete MSG T18 4.5-5,8,15 0.98 µs Command Complete MSG to Bus Free T19 4.5-5,8,15 0.51 µs Data to Save Data Pointe r MSG T20 4.5-14 4.00 µs Save Data Pointer MSG to Disconnect MSG T21 4.5-14 0.79 µs Command Byte Tr ansf er T22 4.5-4 0.04 µs Next Command Byte Access: 4.5-4

Next CDB Byte Access (Byte 2 of 6) T 23. 6.2 4.5-4 0.58 µs

Next CDB Byte Access (Byte 3 of 6) T 23. 6.3 4.5-4 0.12 µs

Next CDB Byte Access (Byte 4 of 6) T 23. 6. 4 4.5-4 0.12 µs

Next CDB Byte Access (Byte 5 of 6) T 23. 6.5 4.5-4 0.12 µs

Next CDB Byte Access (Byte 6 of 6) T 23. 6.6 4.5-4 0.12 µs

Next CDB Byte Access (Byte 2 of 10) T23.10.2 4. 5-4 0.59 µs

Next CDB Byte Access (Byte 3 of 10) T23.10.3 4. 5-4 0.11 µs ±1 µs

Next CDB Byte Access (Byte 4 of 10) T23.10.4 4. 5-4 0.12 µs ±1 µs

Next CDB Byte Access (Byte 5 of 10) T23.10.5 4. 5-4 0.11 µs ±1 µs

Next CDB Byte Access (Byte 6 of 10) T23.10.6 4. 5-4 0.11 µs ±1 µs

Next CDB Byte Access (Byte 7 of 10) T23.10.7 4. 5-4 0.13 µs ±1 µs

Next CDB Byte Access (Byte 8 of 10) T23.10.8 4. 5-4 0.12 µs ±1 µs

Next CDB Byte Access (Byte 9 of 10) T23.10.9 4. 5-4 0.12 µs ±1 µs

Barracuda 50 Product Manual, Rev. C 67

T able 17: Disc drive SCSI timing

Description

Waveform symbol [1]

Waveform table [1] T ypical timing

Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.12 µs ±1 µs Data In Byte Transfer (parameter) T24 4.5-12 0.04 µs Data Out Byte Transfer (parameter) T25 4.5-13 0.04 µs Next Data In Byte Access (parameter) T26 4.5-12 0.12 µs Next Data Out Byte Access (parameter) T27 4.5-13 0.12 µs Data In Byte Transfer (media) [2] T28 4.5-12 0.04 µs Data Out Byte Transfer (media) [2] T 29 4.5-13 0.04 µs Next Data In Byte access (media [2] T30 4.5-12 0.12 µs Next Data Out Byte access (media [2] T31 4.5-13 0.12 µs MSG IN Byte Transf er T32 4.5-5,7,8,14,15 0.04 µs MSG OUT Byte Transfer T33 4.5-2 0.04 µs STATUS Byte Transfer T34 4.5-5,8,15 0.04 µs Synchronous Data Transfer Characteristics:

Request Signal Tr ansf er Period [3] –– various (800 ns max)

Notes.

[1] See the Timing examples section in the SCSI Interface Product Manual, part number 77738479. [2] Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3 of this manual. [3] Synchronous Trans fer Period is determined by negotiations between an Initiator and a Drive. The Drive is

capable of setting periods as given in Section 9.5. See also the Synchronous Data Transfer section and the Extended Messages section in the SCSI Interface Product Manual , for a description of synchronous data transfer operation.

9.11 Drive activity LED

The following table provides drive activity LED status.

Table 18: Drive activity LED status

Spindle status Command status LED status

Spinning up with DC power appl ied N/A On until spinup is complete Spun down St art Unit On while processing the command Powered down by removal of DC power N/A Off due to absence of power Spun up Stop Unit On while processing the command Spun down No command activity Off Spun down Write/Read Buffer On while processing the command Spun down SCSI Bus Reset On while processing t he reset Spun down Test Unit Ready On while processing the command Spun up No command activity Off Spun up Write/Read On while processing the comma nd Spun up SCSI Bus Reset On while processing the reset Spun up Test Unit Ready On while processing the command Spun up Format with Immediate opt ion on On while the command is initially processed Spun up Format without Immedi ate LED toggles on/off on e ach cylinder boundary

Barracuda 50 Product Manual, Rev. C 69

10.0 Seagate Technology support services Online Services

Internet

For online inf ormation about Seagate products, visit www .seagate.com or e-mail y our disc or t ape questions to:

Presales Support:

Disc: http://www.seagate.com/support/email/email_presales.shtml or DiscPresales@Seagate.com Tape: http://www.seagate.com/support/email/email_tape _pres ales.shtml or

Tape_Sales_Support@Seagate.com

Technical Suppor t :

Disc: http://www.seagate.com/support/email/email_disc_support.shtml or DiscSupport@Seagate.com Tape: http://www.seagate.com/support/email/email_tape _su pport.shtml or TapeSupport@Seagate.com

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

SeaBOARD

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

Automated Services

SeaFONE® (1-800-SEAGATE)

help services. U sing a touch-tone phone, you can find answers to service phone numbers, comm only asked questions, troubleshooting tips and specifications for dis c drives and tape drives 24 hours daily. International callers can reach this service by dialing +1-405-936-1234.

SeaFAX

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

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

is Seagate's toll-free number (1-800-732-4283) to a ccess our automated s elf-

Presales Support

Our Presales Suppo rt staff c an help you deter mine which S eagate products are best suited for your specific application or computer system.

Seagate Express

You can purchase select tape produc ts an d t ape acces sories through Seagate E xpress 2 4 hours daily by calling 1-800-531-0968 or by faxing your orde r to: +1-972-481-4812.

Technical Support

If you need help installing your drive, consult your dealer. Dealers are familiar with their unique system configurations and can help you with system conflicts and other t echnical issues. If you need additional help, you can talk to a Seag ate technical suppo rt specialist. Before calling, note your system configuration and dr ive model number (STxxxxx).

SeaTDD™(+1-405-936-1687)

comments 24 hours dai ly and exchange messages with a t echnical su pport specialist from 8:00 A.M. to 12:15 P.M. and 1:30 P.M . to 6:00 P.M. (central time) Monday through Fr iday.

is a telecommunications device for the deaf (TDD). You can send ques tions or

Customer Service (CSO)

Warranty Re pair

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

Authorized Service Centers

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

70 Barracuda 50 Product Manual, Rev. C

USA/Canada/Latin America Support Services

Presales Support

Disc: 1-877-271-3285 or +1-405-936-1210 F AX: +1-405-936-1683 Tape: 1-800-626-6637 or +1-714-641-2500 FAX: +1-714-641-2410

T e c hnical Support (SeaFONE)

1-800-SEAGATE or +1-405-936-1234 (for specific product phone number) FAX: Disc: +1-405-936-1685; Tape: +1-405-936-1683

SeaFAX SeaTDD SeaBOARD

1-800-SEAGATE +1-405-936-1687 Disc: +1-405-936-1600; Tape: +1-405-936-1630

Warranty Re pair

USA/Canada 1-800-468-3472 FAX: +1-405-949-6740 Latin America +1-405-949-7758 FA X : +1-405-949-6738

Authorized Service Centers

Brazil

MA Informatica +55-21-516-6649 FAX: +55-21-516-5280

Canada

Memofix +1-905-660-4936 F AX: +1-905-660-4951 Adtech +1-905-812-8099 or 1-800-624-9857 FA X: +1-905-812-7807

European Support Services

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

A.M

If your country is not listed here, dial our European call center at +31-20-316-7222 from 8:30 (European central time) Monday through Friday. The European call center is located in Amst erdam , The Netherlands.

. to 5:00 P.M.

Call Center

Austria 0 800-20 12 90 Belgium 0 800-74 876 Denmark 80 88 12 66 France 0 800-90 90 52 Germany 0 800-182 6831 Ireland 1 800-55 21 22 Italy 1 677 90 695 Netherlands 0 800-732 4283 Norway 800-113 91 Poland 00 800-311 12 38 Spain 900-98 31 24 Sweden 0 207 90 073 Switzerland 0 800-83 84 11 Turkey 00 800-31 92 91 40 United Kingdom 0 800-783 5177

SeaBOARD

Germany +49-89-1409331

Fax Services—All European Countries

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

Barracuda 50 Product Manual, Rev. C 71

Africa/Middle East Support Services

For presales, technical support, warranty repair and FA X s ervices in Africa and the Middle East, dial our European call center at +31-20-316-7222 from 8:30 a.m. to 5: 00 p.m. (Europea n c entral tim e) M onday through Friday, or send a FAX to +31-20-653-3513. The European ca ll center is located in Amsterdam, The Netherlands.

Asia/Pacific Suppor t Services

T e c hnical Support

Australia +61-2-9725-3366 FAX: +61-2-9725-4052 Hong Kong + 852-2368 9918 FAX: +852-2368 7173 Japan — FA X: +81-3-546 2-2979 Singapore + 65-488-758 4 FAX: +65-488-7528 Taiwan +886-2-2514 -2237 FAX: +886-2-2715-2923

SeaFAX

Australia +61-2-9756-5170

Warranty Re pair

Japan +81-3-5462-2904 FAX: +81-3-546 2-2979 Asia/Pacific and Australia +65-485-3595 FAX: +65-488-7503

Barracuda 50 Product Manual, Rev. C 73

Appendix A. Sense keys and additional sense codes supported

Sense key Description Suppo rted

0h No sen se Y 1h Recovered err or Y 2h Not ready Y 3h Medi a error Y 4h Hardware error Y 5h Illegal request Y 6h Unit attention Y 7h Data protect N 9h Firm ware er ro r N Bh Aborted command Y Ch Equal N Dh V olume overflow N Eh Miscompare Y

Additional sense code and qualifier

Bytes

Description Sup po rted12 13

00 00 No additional information Y 01 00 No index/se ctor signal Y 02 00 No seek complete Y 03 00 Write fault Y 04 00 Drive not ready, no additional inf ormation Y 04 01 Drive not ready, in spin-up mode Y 04 02 Drive not ready, waiting for initialization comm and Y 04 03 Drive not ready, human intervention required Y 04 04 Drive not ready, format in process Y 05 00 No drive response when sel ected N 06 00 Track 0 not found N 07 00 More than one drive selected N 08 00 Drive communication failure N 08 01 Drive communication timeout N 08 02 Drive communic ati on pari ty error N 09 00 Track following error Y 09 04 Head select fault N 0A 00 Error log overrun N 0C 00 Write error N 0C 01 Write error recovered by autoreallocati on N 0C 02 Write error, autoreal location failed Y 10 00 ID CRC error N 11 00 Unrecover ed read error Y 11 01 Read retries exhausted N 11 02 Error too long to correct N 11 04 Unrecover able read error, aut oreallocation failed N

74 Barracuda 50 Product Manual, Rev. C

Bytes

Description S upported12 13

12 00 No address mark in ID field N 13 00 No address mark in data field N 14 00 Sector not found Y 14 01 No record found N 15 00 Seek positioning error Y 15 01 Mechanical positioning error N 15 02 Posit ioning error determined by reading media N 16 00 Data synchronization mark error Y 17 00 Data recovered without ECC or retries Y 17 01 Data recovered w ith re tr ies N 17 02 Data recovered with positive head offset N 17 03 Data recovered with negative head offset N 17 05 Data recovered with previous sector ID N 17 06 Data recovered without ECC N 18 00 Data recover ed with ECC N 18 01 Data recovere d wit h ECC and retries N 18 02 Data recovered with ECC, retries, and autoreallocati on N 18 05 Recovered reassignment N 18 07 Recovered data with ECC, data re w r itten N 19 00 Error in defec t list Y 19 01 Defect list not available N 19 02 Error in P-list N 19 03 Error in G-list N 1A 00 Parameter ov errun Y 1B 00 Synchronous transfer error N 1C 00 Defect list not found Y 1C 01 P-list not found N 1C 02 G-list not found N 1D 00 Compare error with ver ify Y 1E 00 Recovered ID error N 20 00 Drive received invalid operation code Y 21 00 LDA out of range Y 24 00 CDB with invalid bit Y 25 00 CDB with invalid LUN Y 26 00 CDB with invalid f ield Y 26 01 CDB with unsupported parameter N 26 02 CDB with invalid parameter N 26 03 CDB with unsupported threshold par ame ter N 27 00 Write protected Y 29 00 Power-on or pin 40 bus reset occurred Y 29 02 SCSI bus reset occurred Y 29 03 Bus Device Reset function occurred Y 29 04 Device internal reset occurred Y 29 05 Transceiver mode cha nged to single-ended Y

Barracuda 50 Product Manual, Rev. C 75

Bytes

Description Sup po rted12 13

29 06 Transceiver mode changed to LVD Y 2A 00 Parameters changed by another initiator N 2A 01 Mode select parameters changed by another initiat or Y 2A 02 Log parameters changed Y 2A 03 Reservation Pre em pted Y 2F 00 Tagged commands cleared by another in itiator Y 31 00 Format command failed Y 32 00 Defect locations not av ailable Y 37 00 Rounded parameter error N 39 00 Saved parameters not supported Y 3D 00 Identify message with invalid bits N 3F 00 Target operation command changed N 3F 01 Microcode changed Y 3F 02 SCSI-1/SCSI-2 change N 40 00 Target operating condit ions have changed Y 40 01 DRAM parity error detected Y 40 93 Error in write to flash Y 42 00 Power on or self test error N 43 00 Message reject error Y 44 00 Internal controller error N 45 00 Selection or reselection error N 47 00 Bus parity error Y 48 00 Initiator detected error Y 49 00 Initiator received invalid message fr om drive Y 4E 00 Drive attempted overlapped commands Y 5B 00 Log exception—factory option N 5B 01 Threshold condition met—factory option Y 5B 02 Log counter reached maximum value—factory option N 5B 03 Log list codes all used—factory option N 5C 00 RPL status change, drive lost sync h ronization N 80 00 General firmware error qualifier N

Barracuda 50 Product Manual, Rev. C 77

11, 12

Index

Symbols

+5 and +12 volt supplies 19

“G” list “P” list

buffer

11, 12

buffer segment buffer-full buffer-full ratio bulkhead connector bus device reset message bytes/surface bytes/track

Numerics

68 conductor connector 54 68 pin connector 80 conductor connector 80 conductor interface 80 pin connector option 80 pin I/O connector

53, 60, 61

AC power 19

7, 38

23, 38

38 25

9, 10 8

3, 7

23, 38

9, 10

access time accessories acoustics activity indicator acti vity LE D actuator actuator assembly adaptive read look-ahead adaptive servo calibration address air circulation air cleanliness air flow

suggested air inlet altitude altitude and atmospheric pressure ambient ambient temperature ANSI SCSI documents ANSI SCSI-2/SCSI-3 SPI-2 ANSI SPI-2 (T10/1142D) arbitration priority ARLA asynchronous interface transfer rate audible noise Australia/New Zealand Standard Australia’s Spectrum Management Agency (SMA) automatic retry automatic shipping lock average idle current average latency average rotational latency

background processing 7 backward compatibility bits/inch

cabinet cooling 38 cable

51 cache cache buffer cache miss cache mode cache operation cache operation hit cache segment caching write data calibration Canadian Department of Communications capacities capacity, drive, programmable case temperature CE Marking change definition command changeable bit changeable value check condition class B limit command command descriptor block (CDB) command queuing condensation conducted noise immunity connect/disconnect connector connector contact consecutive read operation contiguous blocks of data continuous vibration controller controller overhead controlle r se lf t es t cooling

cooling air C-Tick Marking current current I/O processes current lim it in g current profile current requirements current value cylinder boundary

11, 12

10, 42

22, 25

3, 4

20, 21

47, 48

19, 20

78 Barracuda 50 Product Manual, Rev. C

daisy-chain 20, 53, 55

80 conductor data area data correction data transfer period data transfer protocol data transfer rate DC cable and connector DC current DC power DC power carrying conductor DC power connector DC power requirements DC power source dedicated landing zone default default mode parameter default value defect/error management delayed motor start option delayed start depot repair depot repair philosophy DEXCPT diagnostics differential SCSI driver differential SCSI receiver differentiating features DIFFSENS dimensions disable read ahead disc access disc media disc rotational speed disconnect/reconnect

discontinuity (DISC) bit DRA bit drive drive activity drive activity LED drive capacity

drive default mode parameter drive failure drive firmware drive ID drive ID select drive ID select jumper connector drive ID/option select header drive insertion drive interface connector drive internal drive internal defects and errors drive malfunction

36, 37

control

specification

programmable

10, 13, 37, 51

47, 48

19, 62

37, 63

34, 35

28, 39

10, 38

drive mounting

constraints drive option select header drive orientation drive power drive primary defects list drive SCSI timing drive select header drive spindle drive transfer drive volume drive warranty dynamic spindle brake

ECC 13

51, 62

ECC correction ECC correction capability EFT defect list electrical characteristics electromagnetic compatibility electromagnetic compatibility (EMC) electromagnetic interference (EMI) electromagnetic susceptibility embedded servo EMC com plia nce EMI requirements environment environmental control environmental interference environmental limits environmental requirements

EPROM equipment malfunction error error management system error rate error rate calculation error recovery ESD European Union requirements EVPD bit execution time extended messages extended sense

Fast-20 4

5, 7, 10 5, 7, 10

Fast-20 SCSI Fast-40 SCSI fault status FCC rules and regulations field repair firmware flat ribbon cable flaw reallocation format

Barracuda 50 Product Manual, Rev. C 79

format command 9

format time formatted formatting front panel front panel LED

GOOD 12 gradient ground return grounding

23, 25

hard reset 47

7, 15

22, 25

39, 54

hardware error HDA

5, 15, 23, 38, 39

temperature head and disc assembly. See HDA heads

20 heat removal heat source high level format high voltage differential host

12, 31, 37, 44, 53, 55

host adapter

adapter/initiator host backplane wiring host equipment

DC power

manufacturer host I/O signal host system host system malfunction host/drive operational interface

hot plug humidity HVD

I/O connector 53

4, 8

identified defect inquiry command inquiry vital product data installation installation guide installat ion ins t r u c ti on s instantaneous current peak integrated SCSI controller interface cable length interface data interface requirements interface timing interleave interleave factor internal data rate

jumper 8, 33, 36, 37, 62 jumper function description jumper header jumper plug type

landing zone 7, 20 LB

LED

67 logical logical block logical characteristics logical segment (mode select page 08h) low level fo r mat low voltage differential mode LVD LVD mode

11, 12

53, 63, 64

magnetoresistive heads 5

51, 54

47, 48

10, 19, 62

11, 47

47, 48

13, 39

28, 29

mating connector mating flat cable connector maximum case temperature maximum current requirements maximum operating current maximum starting current ME jumper mean time between failure. See MTBF media media defect media defect induced error medium error message protocol message protocol syste m messages

miscellaneous features mode page 01 mode page 08h mode parameter

mode select command mode select page 08h mode sense command mode sense command page 08h mode sense data mode sense value model number table motor start command motor start delay option motor start o p tion mounting configuration mounting configuration dimensions mounting constraints mounting point

7, 47

SCSI interface

page 08h

80 Barracuda 50 Product Manual, Rev. C

mounting surface 39

mounting surface distortion mounting surface stiffness MR heads MTBF multimode drivers mult imode receivers multimode SC SI multiple segment multi-segmented cache control

13, 14, 23

noise 20

audible

non-operating

temperature non-operating vibration nonshielded 68 conductor connector

3, 7

25, 27

office environment 27 operating operating environment operating option operating parameter operator intervention option jumper option jumper location option select header option select jumper options orientation out-of-plane deflection out-of-plane distortion overhead time

25, 27

10, 25, 38

51 33

package size 26

package test specification packaged parity parity checking parity error partition or logical drive PCB

PCB circuit run PD jumper peak bits/inch peak starting current PERF performance characteristics performance degradation peripheral I/O cable physical buffer space physical characteristics

15, 33, 36, 38, 39, 47, 51, 53, 54, 55

temperature

51, 52

19, 20

11, 12

13, 14

physical damage physical interface physically contiguous blocks of data power power connector power control switch power dissipation power distribution power sequencing power supply voltage power-carrying conductor power-on power-on operating hours power-on reset power-up power-up hours prefetch prefetch (read look-ahead) prefetch ceiling field prefetch data prefetch field prefetch hit prefetch mode prefetch of contiguous blocks prefetch operation prefetch segmented cache control preventive maintenance printed circuit board. See PCB PRML read channel electronics product data page programmable drive capacity

19, 20

33, 62

20, 37

11, 12

radio interference regulations 3 RC bit RCD RCD bit read read command read continuous (RC) bit read data read error read error rate read operation read retry count read/write head ready receive diagnostic results recommended mounting recording code recoverable seek error reference documents regulation relative h umidity reliability reliability and service reliability specifications

11, 12

13, 31

Barracuda 50 Product Manual, Rev. C 81

remote switch 33

repair facility repair information REQ/ACK offset request sense command request sense information resonance retrieved data

S.M.A.R.T. 7, 16

10 32

3, 4, 5

safe power transmission safety

7, 33

33, 37

13, 14

47, 48

31 10 10

10, 13, 53

7, 8, 10

saved value SCA

63 SCA-2 EIA specification SCAM SCSI

commands format commands interface data transfer rate

messages SCSI bus SCSI bus cable SCSI bus condition SCSI bus ID SCSI bus phase sequence SCSI bus reset SCSI command SCSI Fast-2 0 SCSI Fast-4 0 SCSI I/O connector SCSI ID SCSI interface SCSI interface cable SCSI interface commands supported SCSI interface connector SCSI interface data SCSI Interface Product Manual SCSI systems error SCSI systems error consideration SCSI systems error management SCSI-1 mod e SCSI-2 SCSI-2/SCSI-3 SCSI-2/SCSI-3 mode SCSI-3 (Fast-20 and Fast-40) interface SCSI-3 Parallel Interface-2 (SPI-2) SE

53, 63 SE drivers Seagate support service sector sector interleave sector size sector transfer seek error seek positioning error

segment segment number self-contained Self-Monitoring Analysis and Reporting Technology.

SE-LVD alternative sense code sense key sequential read operations service

servo data SFF-8046 specification SFF-8046, SCA-2 specification shielding shipping shipping container shock

shock mount signal ground single connection attachment (SCA) single unit shipping pack single-ended drivers single-ended SCSI driver single-ended SCSI receiver site installation software interleave spare part Spectrum Management Agency (SMA ) SPI SPI-2 spindle spindle startup standard day standards start motor command start unit command start/stop time status status byte STIR algorithm stop spindle Stop Spindle command stop time storage capacity straight-in connector strict bit in Mode page 00h supply voltage support services synchronous data transfer synchronous data transfer operation synchronous data transfer period synchronous transfer negotiation synchronous transfer period synchronous transfer rate

See S.M.A.R.T.

14, 73

life

13, 15 philosophy tools

and vibration

69, 73

51 15

82 Barracuda 50 Product Manual, Rev. C

system chassis 39 system recovery procedures

technical support services 69, 73 temperature

ambient case gradient maximum case non-operating PCB and HDA regulation

See also cooling terminated termination terminator power terminator requirements TERMPWR tracks/inch tracks/surfa ce , total transfer period transfer rate typical access ti me

10, 22, 23, 38 23

33, 65

X3.131-1994 4 X3T10/1071D X3T10/1142D X3T10/1143D X3T10/855D

4 4, 53, 63 4

zoned bit recording (ZBR) 7

Ultra SCSI 4, 5, 7 unformatted unrecoverable condition unrecoverable error unrecoverable seek error Unrecoverable write error

vibration 25, 27

vital product data volatile m e mory voltage voltage margin

10, 19

wall/bracket mounted connector 54 warranty WCE wet bulb temperature WP jumper wrap-around write caching write error

write operation write protect write retry count

7, 17

unrecoverable

Seagate Tech no logy, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA

Publication Number: 83329471, Rev. C, Printed in USA

seagate ST150176 Installation guide

Specifications and Main Features

Frequently Asked Questions

User Manual

1.0 Scope

2.0 Applicable standards and reference documentation

2.1 Standards

2.1.1 Electromagnetic compatibility

2.1.2 Electromagnetic susceptibility

2.2 Electromagnetic compliance

2.3 Reference documents

3.0 General description

3.1 Standard features

3.2 Media characteristics

3.3 Performance

3.4 Reliability

3.5 Unformatted a n d formatted capacities

3.6 Programmable drive capacity

3.7 Factory installed accessories

3.8 Options (factory installed)

3.9 Accessories (user installed)

4.0 Performance characteristics

4.1 Internal drive characteristics (transparent to user)

4.2 SCSI performance characteristics (visible to user)*

4.2.1 Access time [8]

4.2.2 Format command execution time (minutes) [1]*

4.2.3 Generalized performance chara cteris tics

4.3 S tar t/stop ti me

4.4 Prefetch/multi-segmented cache control

4.5 Cache operation

4.5.1 Caching write data

4.5.2 Prefetch operation

5.0 Reliability specifications

5.1 Error rates

5.1.1 Environmental interference

5.1.2 Read errors

5.1.3 Write errors

5.1.4 Seek errors

5.2 Reliability and service

5.2.1 Mean time between failure

5.2.2 Field failure rate vs time

5.2.3 Preventive maintenance

5.2.4 Service life

5.2.5 Servi c e philosophy

5.2.6 Service tools

5.2.7 Hot plugging Barrac uda 50 disc drives

5.2.8 S.M.A.R.T.

5.2.9 Product warranty

6.0 Physical/electrical specifications

6.1 AC power requirem ents

6.2 DC power requirements

6.2.1 Conducted noise immunity

6.2.2 Power sequencing

6.2.3 Curre nt prof ile

6.3 Power dissipation

6.4 Environmental limits

6.4.1 Temperature

6.4.2 Relative humidity

6.4.3 Effective altitude (sea level)

6.4.4 Shock and vibration

6.4.4.1 Shock

6.4.4.2 Vibration

6.4.5 Air cleanliness

6.4.6 Acoustics

6.4.7 Electromagnetic susceptibility

6.5 Mechanical specifications

7.0 Defect and error management

7.1 Dri ve internal defects

7.2 Drive error recovery procedures

7.3 SCSI system s errors

8.0 Installation

8.1 Dri ve ID/optio n select heade r

8.1.1 Notes for Figures 11, 12, and 13.

8.1.2 Function description

8.2 Dri ve orientation

8.3 Cooling

8.3.1 Air flow

8.4 Dri ve moun ting

8.5 Grounding

9.0 Interface requirements