seagate ST5660N, ST5660NC User manual

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Decathlon Family

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

ST5660N, ST5660NC

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SCSI Interface Drives

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Product Manual

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Decathlon Family

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

ST5660N, ST5660NC

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

SCSI Interface Drives

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

Product Manual

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Seagate

, Seagate Technology® and the Seagate logo are registered trademarks of Seagate Technology, Inc. Other product names are trademarks or registered trademarks of their owners.

Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any form without written permission from Seagate Technology, Inc.

Decathlon Family Product Manual, Rev. B iii

Contents

1.0 Specifications summary . . . . . . . . . . . . . . . . . . . . 1

1.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Physical geometry . . . . . . . . . . . . . . . . . . . . . . . 1

1.3 Functional specifications . . . . . . . . . . . . . . . . . . . 1

1.4 Physical dimens ions . . . . . . . . . . . . . . . . . . . . . . 2

1.5 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.6 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.7 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.7.1 Read look-ahead and caching . . . . . . . . . . . . . . 3

1.8 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.8.1 Ambient temperature . . . . . . . . . . . . . . . . . . . 3

1.8.2 Temperature gradient . . . . . . . . . . . . . . . . . . . 3

1.8.3 Relative humidity . . . . . . . . . . . . . . . . . . . . . 3

1.8.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.9 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . 4

1.10 Start and stop time . . . . . . . . . . . . . . . . . . . . . . 4

1.10.1 Power-up sequence . . . . . . . . . . . . . . . . . . . 5

1.10.2 Power-down sequence . . . . . . . . . . . . . . . . . 5

1.10.3 Auto-park . . . . . . . . . . . . . . . . . . . . . . . . 6

1.11 DC power . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.11.1 Input noise . . . . . . . . . . . . . . . . . . . . . . . . 6

1.12 Power management . . . . . . . . . . . . . . . . . . . . . 6

1.12.1 Power consumption . . . . . . . . . . . . . . . . . . . 7

1.13 Agency listings . . . . . . . . . . . . . . . . . . . . . . . . 9

1.14 FCC verification . . . . . . . . . . . . . . . . . . . . . . . 9

2.0 Hardware and interface . . . . . . . . . . . . . . . . . . . . 11

2.1 SCSI-2 compatibility . . . . . . . . . . . . . . . . . . . . . 11

2.2 Handling and static-discharge precautions . . . . . . . . . 11

2.3 Electrical interface . . . . . . . . . . . . . . . . . . . . . . 12

iv Decathlon Family Product Manual, Rev. B

2.4 Interface and connector configuration . . . . . . . . . . . . 13

2.4.1 ST5660N interface connector . . . . . . . . . . . . . 13

2.4.2 ST5660N interface connector pin assignments . . . . 15

2.4.3 ST5660NC interface connector . . . . . . . . . . . . . 16

2.4.4 ST5660NC interface connector pin assignments . . . . 16

2.5 Interface cable requirements . . . . . . . . . . . . . . . . 18

2.5.1 Interface cable length for asynchronous operation . . . 19

2.5.2 Interface cable for Fast SCSI operation . . . . . . . . 19

2.6 Options jumper block . . . . . . . . . . . . . . . . . . . . 19

2.6.1 Active Termination . . . . . . . . . . . . . . . . . . . 20

2.6.2 SCSI address . . . . . . . . . . . . . . . . . . . . . . 20

2.6.3 Terminator power source selection . . . . . . . . . . . 20

2.6.4 Parity enable option . . . . . . . . . . . . . . . . . . 22

2.6.5 Start/stop option . . . . . . . . . . . . . . . . . . . . 22

2.6.6 Remote LED connection . . . . . . . . . . . . . . . . 22

2.7 Auxiliary SCSI ID block . . . . . . . . . . . . . . . . . . . 22

2.8 Daisy chaining . . . . . . . . . . . . . . . . . . . . . . . . 22

2.9 Hot-plugging . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.10 Mounting the drive . . . . . . . . . . . . . . . . . . . . . 24

3.0 Command set . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.1 Command descriptor block . . . . . . . . . . . . . . . . . 27

3.2 Status byte codes . . . . . . . . . . . . . . . . . . . . . . 27

3.3 Supported commands . . . . . . . . . . . . . . . . . . . . 29

3.4 Group 0 commands . . . . . . . . . . . . . . . . . . . . . 30

3.4.1 Test Unit Ready command (00

3.4.2 Rezero Unit command (01

3.4.3 Request Sense command (03

3.4.4 Format Unit command (04

3.4.5 Reassign Blocks command (07

3.4.6 Read command (08

3.4.7 Write command (0A

) . . . . . . . . . . . . . . . . . 39

) . . . . . . . . . . . . . . . . . 40

) . . . . . . . . . . . . 30

) . . . . . . . . . . . . . . 30

) . . . . . . . . . . . . 31

) . . . . . . . . . . . . . . 32

) . . . . . . . . . . . 37

Decathlon Family Product Manual, Rev. B v

3.4.8 Seek command (0BH) . . . . . . . . . . . . . . . . . 41

3.4.9 Inquiry command (12

3.4.10 Mode Select command (15

3.4.11 Reserve command (16

3.4.12 Release command (17

3.4.13 Mode Sense command (1A

3.4.14 Start/Stop Unit command (1B

3.4.15 Receive Diagnost ic Results command (1C

3.4.16 Send Diagnost ic command (1D

) . . . . . . . . . . . . . . . . . 41

) . . . . . . . . . . . . . 42

) . . . . . . . . . . . . . . . 46

) . . . . . . . . . . . . . . . 47

) . . . . . . . . . . . . . 48

) . . . . . . . . . . . . 52

) . . . . . 53

) . . . . . . . . . . . 55

3.5 Group 1 commands . . . . . . . . . . . . . . . . . . . . . 56

3.5.1 Read Capacity command (25

3.5.2 Read Extended command (28

3.5.3 Write Extended command (2A

3.5.4 Seek Extended command (2B

3.5.5 Write and Verify command (2E

3.5.6 Verify command (2F

) . . . . . . . . . . . . . . . . . 62

3.5.7 Read Defect Data command (37

3.5.8 Write Data Buffer command (3B

3.5.9 Read Data Buffer command (3C

3.5.10 Read Long command (3E

3.5.11 Write Long command (3F

) . . . . . . . . . . . . 56

) . . . . . . . . . . . . 57

) . . . . . . . . . . . . 58

) . . . . . . . . . . . . 60

) . . . . . . . . . . . 63

) . . . . . . . . . . . 65

) . . . . . . . . . . . 66

) . . . . . . . . . . . . . . 68

) . . . . . . . . . . . . . . 69

3.6 Group 2, 3 and 4 commands . . . . . . . . . . . . . . . . 70

3.7 Group 5 and 6 commands . . . . . . . . . . . . . . . . . 70

3.8 Group 7 commands . . . . . . . . . . . . . . . . . . . . . 70

Appendix A. Supported messages . . . . . . . . . . . . . . . . 71

A.1 Single-byte messages . . . . . . . . . . . . . . . . . . . . 71

A.2 Synchronous data transfer request message (01

) . . . . . 72

Appendix B. Sense data . . . . . . . . . . . . . . . . . . . . . . 73

B.1 Additional sense data . . . . . . . . . . . . . . . . . . . . 73

B.2 Sense key . . . . . . . . . . . . . . . . . . . . . . . . . . 74

B.3 Additional sense code and additional sense code qualifier . 76

vi Decathlon Family Product Manual, Rev. B

Appendix C. Mode pages . . . . . . . . . . . . . . . . . . . . . 81

A.1 Error Recovery page (01 A.2 Disconnect/Reconnect page (02 A.3 Format Device page (03 A.4 Rigid Disc Geometry page (04 A.5 Caching page (08

) . . . . . . . . . . . . . . . . . 83

) . . . . . . . . . . . . . 85

) . . . . . . . . . . . . . . . . . 87

) . . . . . . . . . . . . . . 90

) . . . . . . . . . . . . . . . . . . . . . 91

A.5.1 Read look-ahead and read caching . . . . . . . . . . 91

A.5.2 Write caching and write merging . . . . . . . . . . . . 92

A.5.3 Caching page description . . . . . . . . . . . . . . . 93

A.6 Control Mode page (0A A.7 Notch page (0C

) . . . . . . . . . . . . . . . . . . . . . . 98

A.8 Cache Control page (38 A.9 Soft ID page (Flash memory) (3C A.10 Operating page (Flash memory) (00

) . . . . . . . . . . . . . . . . . . 96

) . . . . . . . . . . . . . . . . . 100

) . . . . . . . . . . . . 101

) . . . . . . . . . . 102

Appendix D. Inquiry data . . . . . . . . . . . . . . . . . . . . 105

D.1 Inquiry data . . . . . . . . . . . . . . . . . . . . . . . . 105

D.2 Vital product data pages . . . . . . . . . . . . . . . . . 108

D.2.1 Unit Serial Number page (80 D.2.2 Implemented Operating Definition page (81 D.2.3 Firmware Numbers page (C0 D.2.4 Date Code page (C1

) . . . . . . . . . . . . . . . . 111

D.2.5 Jumper Settings page (C2

) . . . . . . . . . . . . 109

) . . . . 109

) . . . . . . . . . . . 110

) . . . . . . . . . . . . . 111

Appendix E. Timing diagrams . . . . . . . . . . . . . . . . . . 113

Decathlon Family Product Manual, Rev. B vii

Figures

Figure 1.Typical startup current profile . . . . . . . . . . . . . . . . 8

Figure 2. Singled-ended transmitter and receiver . . . . . . . . . . 12

Figure 3. ST5660N connectors . . . . . . . . . . . . . . . . . . . 14

Figure 4. ST5660NC connectors . . . . . . . . . . . . . . . . . . 18

Figure 5. Options jumper block (J8) settings . . . . . . . . . . . . 21

Figure 6. ST5660N auxiliary SCSI ID jumper block (J5) settings . . 23

Figure 7. ST5660N mounting dimensions . . . . . . . . . . . . . . 25

Figure 8. ST5660NC mounting dimensions . . . . . . . . . . . . . 26

Figure 9. Arbitration, selection (without ATN) and command . . . 113 Figure 10. Arbitration, selection (with ATN) and message out . . 114

Figure 11. Identify message out to command . . . . . . . . . . . 115

Figure 12. Command descriptor block transfer . . . . . . . . . . 116

Figure 13. Command, status, command complete message and

bus free . . . . . . . . . . . . . . . . . . . . . . . . 117

Figure 14. Last command byte, disconnect message, bus free

and reselection . . . . . . . . . . . . . . . . . . . . 118

Figure 15. Arbitration, reselection and message in . . . . . . . . 119

Figure 16. Reselection, status, command complete and bus free 120

Figure 17. Last command byte to data in . . . . . . . . . . . . . 121

Figure 18. Last command byte to data out . . . . . . . . . . . . 122

Figure 19. Reselect identify message to data in . . . . . . . . . 123

Figure 20. Data in block transfer . . . . . . . . . . . . . . . . . 124

Figure 21. Data out block transfer . . . . . . . . . . . . . . . . . 125

Figure 22. Last data byte, save pointer message and disconnect

message . . . . . . . . . . . . . . . . . . . . . . . . 126

Figure 23. Data in, status, command complete message and bus

free . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Figure 24. Synchronous timing . . . . . . . . . . . . . . . . . . 128

Figure 25. Synchronous write timing . . . . . . . . . . . . . . . 129

1 Decathlon Family Product Manual, Rev. B

1.0 Specifications summary

1.1 Formatted capacity

The capacities specified here do not include spare sectors and cylinders. The media contains one spare sector per track and two spare cylinders per drive.

Formatted capacity (Mbytes*) 545.29 Total sectors 1,065,036

* One Mbyte equals one million bytes.

1.2 Physical geometry

Discs 2 Read/write heads 4 Cylinders 3,002

1.3 Functional specifications

Interface Fast SCSI-2 Zone Bit Recording method RLL (1,7) External data transfer rate

(Mbytes per sec, avg) Internal data transfer rate

(Mbits per sec) Spindle speed (RPM) 4,500 ± 0.5% Bytes per sector 512 Track density (TPI) 3,309 Recording density

(BPI, max)

5.0 asynchronous

10.0 synchronous

27.6 to 47.2

52,602

Decathlon Family Product Manual, Rev. B 2

1.4 Physical dimensions

Height (max) 0.748 inches (19 mm) Width (max) 4.00 inches (102.1 mm) Depth (max) 5.00 inches (127.0 mm) Weight (max) 1.0 lb (0.45 Kg)

1.5 Reliability

Read error rates are measured with automatic retries and data correction with ECC enabled and all flaws reallocated. MTBF is measured at nominal power at sea level and 40°C ambient temperature.

Nonrecoverable read errors 1 per 10 Seek errors 1 per 10 MTBF 300,000 power-on hours Service life 5 years

bits transferred

physical seeks

1.6 Acoustics

Sound pressure is measured at idle from 1 meter above the drive top cover.

Sound pressure, typ 26 dBA Sound pressure, max 29 dBA

1.7 Seek time

All seek time measurements are taken under nominal conditions of temperature and voltage with the drive mounted horizontally. In the following table:

Track-to-track

•

seeks in both directions.

•

Average/typical

least 5,000 measurements of seeks in both directions between random cylinders, less overhead.

•

Full-stroke

block address zero (LBA 0) to the maximum LBA and back to LBA 0.

seek time is the average of all possible single-track

seek time is a true statistical random average of at

seek time is one-half the time needed to seek from logical

3 Decathlon Family Product Manual, Rev. B

Track-to-track seek time

3.5 msec typ

4.0 msec max Note. Host overhead varies between systems and cannot be specified.

Drive internal overhead is measured by issuing a no-motion seek. Drive overhead is typically less than 1.0 msec.

Average/typical seek time

12.0 msec read

14.0 msec write

Full-stroke seek time

25.0 msec max 6.67 msec

Average latency

1.7.1 Read look-ahead and caching

The drive uses algorithms that improve seek performance by storing data in a buffer and processing it at a more convenient time. Three methods are used: read look-ahead, read caching and write caching. These are described in Appendix C.5.

1.8 Environmental

This section specifies acceptable environmental conditions for the drive. The operating specifications assume that the drive is powered up. The nonoperating specifications assume that the drive is packaged as it was shipped from the factory.

1.8.1 Ambient temperature

Operating 5°C to 55°C (41°F to 131°F) Nonoperating –40°C to 70°C (–40°F to 158°F)

1.8.2 Temperature gradient

Operating 20°C per hour (36°F per hour) Nonoperating 30°C per hour (54°F per hour)

1.8.3 Relative humidity

Operating 8% to 80% noncondensing

Maximum wet bulb 26°C (79°F) Operating gradient, max 10% per hour Nonoperating 5% to 95% noncondensing

Maximum wet bulb 26°C (79°F)

Decathlon Family Product Manual, Rev. B 4

1.8.4 Altitude

Operating –1,000 ft to 10,000 ft (–305 m to 3,048 m) Nonoperating –1,000 ft to 40,000 ft (–305 m to 12,192 m)

1.9 Shock and vibration

All shock and vibration specifications assume that the inputs are measured at the drive mounting screws. Shock measurements are based on an 11-msec, half sine wave shock pulse, not to be repeated more than twice per second.

During normal operating shock and vibration, there is no physical damage to the drive or performance degradation.

During abnormal operating shock and vibration, there is no physical damage to the drive, although performance may be degraded during the shock or vibration episode. When normal operating shock levels resume, the drive meets its performance specifications.

During nonoperating shock and vibration, the read/write heads are positioned in the shipping zone.

Normal operating

Shock 2 Gs 10 Gs 75 Gs 5–22 Hz vibration 0.020-inch

displacement

22–400 Hz vibration 0.50 Gs 0.75 Gs 4.00 Gs

Abnormal operating Nonoperating

0.030-inch displacement

0.160-inch displacement

1.10 Start and stop time

If the motor start option is disabled, the drive becomes ready within 20 seconds after power is applied. If the motor start option is enabled, the drive becomes ready within 20 seconds after it receives the Motor Start command. If the drive receives a command to spin down or power is removed, the drive stops within 15 seconds.

5 Decathlon Family Product Manual, Rev. B

1.10.1 Power-up sequence

The following typical power-up sequence is provided to assist in evaluating drive performance. This information does not constitute a specification or a performance guarantee.

1. Power is applied to the disc drive.

2. The LED comes on for about 5 seconds.

3. Depending on whether there is a jumper installed on pins 15 and 16

of the options jumper block (J8) shown in Figure 5 on page 21, either of the following sequences occurs:

a. If a jumper is not installed, the remote start option is not enabled,

and the drive begins to spin up as soon as power is applied.

b. If a jumper is installed, the remote start option is enabled and the

drive begins to spin up when the host commands the motor to start.

4. Within 250 msec after power is applied, the drive responds to the Test

Unit Ready, Request Sense, Mode Sense and Inquiry commands.

5. The drive begins to lock in speed-control circuits.

6. The actuator lock releases the actuator.

7. The spindle motor reaches operating speed in about 5 seconds. After

5 seconds, there are no speed variations.

8. The drive performs velocity adjustment seeks.

9. The drive seeks track 0 and becomes ready.

1.10.2 Power-down sequence

The following typical power-down sequence is provided to assist in evaluating drive performance. This information does not constitute a specification or a performance guarantee.

1. The power cable is unplugged from the drive, or the drive receives a

command to spin down.

2. Within 3 seconds after the motor begins to spin down, the actuator

lock engages, producing an audible sound.

3. The spindle stops within 15 seconds, whether the power cable is

unplugged from the drive or the drive receives the power-down command.

Decathlon Family Product Manual, Rev. B 6

1.10.3 Auto-park

Upon power-down, the read/write heads automatically move to the shipping zone. The heads park inside the maximum data cylinder. When power is applied, the heads recalibrate to track 0.

Caution. Do not move the drive until the spindle motor has come to a

complete stop; otherwise, you may damage the drive.

1.11 DC power

Except during the write procedure, you can apply power to the drive or remove power from the drive, in any sequence, without losing data or damaging the drive. If you remove power from the drive during the write procedure, you may lose the data currently being written.

1.11.1 Input noise

+5V +12V

Voltage tolerance (including noise)

Input noise frequency (max)

Input noise (max, peak-to-peak)

± 5% ± 5%

25 MHz 25 MHz

100 mV 240 mV

1.12 Power management

The drive supports power-management modes that reduce its overall power consumption. The drive automatically changes from one mode to another in response to interface activity. You do not need to change any parameters or send any special commands to make the drive change modes. The power-management modes are described below.

• Spinup. Spinup is defined as the period during which the spindle is coming up to operating speed. The power consumed in this mode is equivalent to the average power during the first 10 seconds after the drive begins to spin up. Refer to the startup current chart in Figure 1 on page 8 for a typical representation of power consumption during spinup.

7 Decathlon Family Product Manual, Rev. B

• Seeking. The servo electronics are active and the heads are moving to a specific location on the disc. The read/write electronics are powered-down. The power consumed in this mode is equivalent to the average power measured while executing random seeks with a 2revolution (26.6 msec) dwell between seeks. The drive enters this mode from the Idle mode.

• Read/Write. The drive is reading or writing. All electronics are active and the heads are on track. The drive enters this mode from the Idle mode.

• Idle. The spindle is spinning, the heads are parked, and the servo and read/write electronics are powered down. The drive is ready to accept and execute any command after the heads recalibrate. The drive enters this mode from the Read/Write mode.

• Standby. This mode is not implemented.

1.12.1 Power consumption

Values in the table below were measured at the drive power connector with an RMS DC ammeter. The terminating resistor packs are removed and terminator power is supplied through the SCSI connector. All values are measured 10 minutes after the drive spins up except as noted.

During Spinup

Current at +12V

Amps peak 1.25 — — — RMS amps typ — 0.354 0.208 0.116 Watts typ — 4.25 2.50 1.394

Current at +5V

RMS amps typ — 0.35 0.40 0.221 Watts typ — 1.75 2.00 1.106

Power

Total watts typ — 6.00 4.50 2.50

Seeking

Read/ Write

Idle

0.2

0.4

0.6

0.8

1.0

1.2

T4 T5

2 3 4 5 6 7 8 9

Amps

Seconds

Decathlon Family Product Manual, Rev. B 8

Figure 1. Typical startup current profile

T1 Voltage is applied to the drive. T2 After a delay, the startup current is applied and the spindle

begins to turn.

T3 The accelerating current is applied, causing the spindle speed

to increase.

T4 The spindle speed is close to the final, correct value. The drive

begins to lock in the speed-control circuits. T5 The actuator lock releases the actuator. T6 The final speed- control lock is achieved. T7 The servo locks in on track 0 and the drive is ready.

9 Decathlon Family Product Manual, Rev. B

1.13 Agency listings

This drive is listed by agencies as follows:

• Recognized in accordance with UL 478 and UL 1950

• Certified to CSA C22.2 No. 220-M1986 and CSA C22.2 No. 950

• Certified to VDE 0805/05.90 and EN 60950/1.88 as tested by VDE

1.14 FCC verification

Decathlon family drives are intended to be contained solely within a personal computer or similar enclosure (not attached to an external device). As such, a drive is considered to be a subassembly even when individually marketed to the customer. As a subassembly, no Federal Communications Commission authorization, verification or certification of the device is required.

Seagate Technology, Inc. has tested these drives in an enclosure as described above to ensure that the total assembly (enclosure, disc drive, motherboard, power supply, etc.) does comply with the limits for a Class B computing device, pursuant to Subpart J of Part 15 of the FCC rules. Operation with noncertified assemblies is likely to result in interference to radio and television reception.

Radio and television interference. This equipment generates and uses radio frequency energy and, if not installed and used in strict accordance with the manufacturer’s instructions, may cause interference to radio and television reception.

This equipment is designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television, which can be determined by turning the equipment on and off, you are encouraged to try one or more of the following corrective measures:

• Reorient the receiving antenna.

• Move the device to one side or the other of the radio or TV.

• Move the device farther away from the radio or TV.

• Plug the equipment into a different outlet so that the receiver and

computer are on different branch outlets.

Decathlon Family Product Manual, Rev. B 10

If necessary, you should consult your dealer or an experienced radio/television technician for additional suggestions. You may find helpful the following booklet prepared by the Federal Communications Commission:

How to Identify and Resolve Radio-Television Interference Problems.

This booklet is available from the Superintendent of Documents, US Government Printing Office, Washington, DC 20402. Refer to publication number 004-000-00345-4.

Note. This digital apparatus does not exceed the Class B limits for radio

noise emissions from computer equipment as set out in the radio interference regulations of the Canadian Department of communications.

Le présent appareil numérique n′émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de Classe B prescrites dans le règlement sur le brouillage radioélectrique édicté par le Ministère des Communications du Canada.

Sicherheitsanleitung

1. Das Gerrät ist ein Einbaugerät, das für eine maximale Umegebung-

stemperatur von 55°C vorgesehen ist.

2. Zur Befestigung des Laufwerks werden 4 Schrauben 6-32 UNC-2A

benötigt. Bei seitlicher Befestigung darf die maximale Länge der Schrauben im Chassis nicht mehr als 5,08 mm und bei Befestigung an der Unterseite nicht mehr als 5,08 mm betragen.

3. Als Versorgungsspannugen werden benötigt:

+5V ± 5% 0,65A +12V ± 5% 0,45A (1,9A fur ca. 10 Sek. fur ± 10%)

4. Die Versorgungsspannung m uβ SELV entsprechen.

5. Alle Arbeiten dürfen nur von ausgebildetem Servicepersonal durchge-

führt werden.

6. Der Einbaudes Drives muβ den Anforderungen gemäβ DIN IEC 950V

DC 0805/05.90 entsprechen.

Decathlon Family Product Manual, Rev. B 11

2.0 Hardware and interface

The Seagate Decathlon family drives use a SCSI-2 interface that consists of a 9-bit bidirectional bus (8 data bits and 1 parity bit) and 9 control signals. The interface supports multiple initiators, disconnect and reconnect, self-configuring host software and logical block addressing.

The interface employs a singled-ended driver/receiver configuration that uses asynchronous or synchronous communication protocols. It supports asynchronous transfer rates of up to 5 Mbytes per second and synchronous transfer rates of up to 10.0 Mbytes per second. The bus protocol supports multiple initiators, disconnect and reconnect, additional messages and 6-byte and 10-byte command descriptor blocks. The bus cable can be up to 6 meters long for standard mode and up to 3 meters long for Fast SCSI mode.

2.1 SCSI-2 compatibility

The drive interface is described in the publication number 77738479. The drive complies with the mandatory subset of the ANSI SCSI-2 Interface. The Fast SCSI-2 interface is based on the ANSI Small Computer System Interface-2 (SCSI-2), document

number ANSI X3.131-199

(X3T9.2/86-109 Rev. 10h).

Seagate SCSI-2 Interface Manual

2.2 Handling and static-discharge precautions

The Decathlon family drives use static-sensitive devices. Avoid damaging the drive and these devices by observing the following standard handling and static-discharge precautions:

Caution:

• Keep the drive in its static-shielded bag until you are ready to complete

the installation. Do not attach any cables to the drive while it is in its static-shielded bag.

• Before handling the drive, put on a grounded wrist strap, or ground

yourself frequently by touching the metal chassis of a computer that is plugged into a grounded outlet. Wear a grounded wrist strap throughout the entire installation procedure.

Wool and synthetic clothes, carpets, plastics and Styrofoam are contributors to electrostatic build-up. Static discharge can damage sensitive components in your drive and computer.

• Handle the drive by its edges or frame only.

Line driver

(transmitter or transceiver)

+2.85V

110

ohms

+2.85V

110

ohms

Flat cable pair

Line receiver

ANSI SCSI compatible

circuit

ANSI SCSI

compatible circuit

12 Decathlon Family Product Manual, Rev. B

• The drive is extremely fragile—handle it with care. Do not press down on the drive top cover.

• Always rest the drive on a padded, antistatic surface until you mount it in the host system.

• Do not touch the connector pins or the printed circuit board.

• Do not remove the factory-installed labels from the drive or cover them

with additional labels. If you do, you void the warranty. Some factoryinstalled labels contain information needed to service the drive. Others are used to seal out dirt and contamination.

2.3 Electrical interface

Decathlon family drives are designed to use singled-ended interface signals. They employ singled-ended drivers and receivers and active terminator circuitry. Figure 2 shows a single-ended transmitter and receiver without the active terminator circuitry.

• Transmitter characteristics. The drive uses an ANSI SCSI-compat- ible, open-collector, single-ended driver. This driver is capable of sinking a current of 48 mA with a low-level output voltage of 0.4 volts.

• Receiver characteristics. The drive uses an ANSI SCSI single- ended receiver with hysteresis gate or equivalent as a line receiver.

The loss in the cable is defined as the difference between the voltages of the input and output signals, as shown below:

Logic level Driver output (x) Receiver input (x)

Asserted (1) Negated (0)

Figure 2. Singled-ended transmitter and receiver

≤

x ≤ 0.4V 0.0V ≤ x ≤ 0.8V

0.0V

2.5V

≤ x ≤ 5.25V 2.0V ≤ x ≤ 5.25V

Decathlon Family Product Manual, Rev. B 13

2.4 Interface and connector configuration

The Seagate ST5660N and ST5660NC drives are differentiated by their connectors. The ST5660N comes with a standard 50-pin interface connector, a standard 4-pin power connector and an auxiliary SCSI ID block. The ST5660NC comes with a single, 80-pin SCA interface connector. The connectors for both drives are discussed below. To minimize noise, use unshielded mating connectors.

2.4.1 ST5660N interface connector

The ST5660N uses a standard 50-pin, nonshielded, keyed connector. The connector consists of two rows of 25 male contacts 0.100 inches apart. The location of Pin 1 is shown in Figure 3 on page 14. Recommended mating connectors are listed below with their part numbers.

Part numbers for mating 3M connectors compatible with the drive are listed below. These connectors do not have a center key and are available with or without a strain relief.

No strain relief No center key

Closed end (for cable ends)

Open end (for daisy chain)

Part numbers for mating Molex connectors compatible with the drive are listed below. These connectors have a center key.

Closed end (for cable ends)

Open end (for daisy chain)

Below are part numbers for strain reliefs that can be used with the Molex connectors.

Molex strain relief, preferred version in Europe

Molex strain relief, preferred version in Japan

3M 3425-7000

3M 3425-6000

Molex 39-51-2504

Molex 39-51-2501

Molex 90170-0050

Molex 15-25-1503

With strain relief No center key

3M 3425-7050

3M 3425-6050

J3. Standard

power connector

J1. Interface

connector

+5V +5V return +12V return +12V

Circuit board

pin 1

J8.

Options jumper block

pin 1

J5.

Auxiliary

selection

for

SCSI ID

14 Decathlon Family Product Manual, Rev. B

Figure 3. ST5660N connectors

Decathlon Family Product Manual, Rev. B 15

2.4.2 ST5660N interface connector pin assignments

The table below shows the pin assignment for the 50-pin interface connector. A minus sign (−) indicates an active-low signal.

Signal

Signal name

DB(0)– 2 1 DB(1)– 4 3 DB(2)– 6 5 DB(3)– 8 7 DB(4)– 10 9 DB(5)– 12 11 DB(6)– 14 13 DB(7)– 16 15 DB(P)– 18 17 Ground 19–22 — Reserved 23–25 — Terminator power 26 — Reserved 27–28 — Ground 29–30 — ATN– 32 31 Ground 33–34 — BSY– 36 35 ACK– 38 37 RST– 40 39 MSG– 42 41 SEL– 44 43 C/D– 46 45 REQ– 48 47 I/O– 50 49

Caution. Do not connect pin 25 to ground. If you plug in the connector

upside down, the terminator power on pin 26 is shorted to ground. This may damage the drive.

pin number

Ground pin number

16 Decathlon Family Product Manual, Rev. B

2.4.3 ST5660NC interface connector

The ST5660NC uses an 80-pin, male, SCA connector. It is a single piece connector that allows power for the drive to be transmitted through the SCSI bus. The remote LED, motor start options and additional binary codes are also placed on the SCSI bus. Pin 1 is shown in Figure 4 on page 18.

We recommend the AMP Champ 50 mating connector (part number 94-0682-10-1).

2.4.4 ST5660NC interface connector pin assignments

The following table shows the pin assignments for the ST5660NC 80-pin connector. A minus sign (−) indicates an active-low signal.

Signal Pin number Signal Pin number

+12V 1 12V GND 41 +12V 2 12V GND 42 +12V 3 12V GND 43 +12V 4 12V GND 44 NC 5 NC 45 NC 6 NC 46 NC 7 GND 47 NC 8 GND 48 NC 9 GND 49 NC 10 GND 50 IO− 11 GND 51 REQ− 12 GND 52 C/DQ− 13 GND 53 SEL− 14 GND 54 MSG− 15 GND 55 RST− 16 GND 56 ACK− 17 GND 57 BSY− 18 GND 58 ATN− 19 GND 59 DBP− 20 GND 60 DB7− 21 GND 61 DB6− 22 GND 62 DB5− 23 GND 63 DB4− 24 GND 64 DB3− 25 GND 65

Decathlon Family Product Manual, Rev. B 17

Signal Pin number Signal Pin number

DB2− 26 GND 66 DB1− 27 GND 67 DB0− 28 GND 68 NC 29 GND 69 NC 30 GND 70 NC 31 GND 71 NC 32 GND 72 NC 33 GND 73 +5V 34 5V GND 74 +5V 35 5V GND 75 +5V 36 5V GND 76 NC 37 LEDC MTRON SCSIA0 SCSIA2

2 4 4

38 DLYDST 39 SCSIA1 40 SCSIA3

3 4 4

77 78 79 80

Notes 1 to 4 indicate pins also represented on the options jumper block.

Notes:

1. Drive activity signal; same as remote LED setting.

2. Asserted by host to enable Motor Start option (starts motor

through the SCSI bus command). Settings are mutually exclusive option.

3. Asserted by host to enable the Delayed Motor Start option (motor starts at power on or after a delay of 12 seconds times the drive ID). This is a mutually-exclusive option.

4. Binary code on A0, A1, A2 and A3 asserted by host to set up SCSI bus ID in drive.

pin 1

J8.

Options jumper block

pin 1

18 Decathlon Family Product Manual, Rev. B

Figure 4. ST5660NC connectors

2.5 Interface cable requirements

A characteristic impedance of 100 ohms +10% is recommended for the unshielded flat or twisted pair interface cable. However, most available cables have a somewhat lower characteristic impedance. To minimize discontinuities and signal reflections, do not use cables of different impedances in the same bus. Implementation may require tradeoffs in wielding effectiveness, cable length, the number of loads and the transfer rates to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same bus, the effect of impedance mismatch must be carefully considered. This is especially important for maintaining adequate margin for Fast SCSI transfer rates.

To minimize noise, use 28 AWG or larger 50-conductor flat cable or 25-conductor twisted pair ribbon cable. The following are part numbers for nonshielded flat cables we recommend:

Part Manufacturer

Flat Cable 3M-3365-50 Twisted Pair Spectra Twist-N-Flat 455-248-50

Decathlon Family Product Manual, Rev. B 19

2.5.1 Interface cable length for asynchronous operation

The SCSI interface cable must meet the following requirements for normal operation:

• The cable cannot be longer than 6.0 meters.

• Cable stubs cannot be more than 0.1 meter long and must be

separated by at least 0.3 meter.

2.5.2 Interface cable for Fast SCSI operation

When using fast synchronous data transfer rates, the SCSI interface cable must meet the following additional requirements:

• The cable cannot be longer than 3.0 meters.

• The cable should not attenuate a 5 MHz signal more than 0.095 dB

per meter.

• The DC resistance at 20°C must not exceed 0.230 ohms per meter.

• A shielded, twisted-pair cable should not have a propagation delay

delta greater than 20 nsec per meter.

2.6 Options jumper block

Both ST5660N and ST5660NC have the options jumper block at J8 (see Figure 3 on page 14 and Figure 4 on page 18 for its location). The options jumper block allows you to manually:

• Enable or disable active termination

• Set the SCSI ID address

• Select the terminator power source

• Enable parity

• Activate the motor start/stop option

• Attach a remote LED

These functions are represented on the options jumper block for both drives. Figure 5 on page 21 shows how to configure the jumpers. However, the ST5660NC allows you to control some of these functions through the SCSI bus (the pin assignment chart on page 17 shows the functions that can be programmed through the bus).

20 Decathlon Family Product Manual, Rev. B

The jumper block accepts 2-mm jumpers. Spare jumpers are included with the drive attached to the pins shown in the figure. If you need additional jumpers, use the jumpers listed below or equivalent.

Manufacturer Part number

Seagate 13211-001 Du Pont 89133-001 Methode 8618-202-70

2.6.1 Active Termination

The ST5660N and ST5660NC use a jumper on the options jumper block to enable active termination. You can order the drive with the active termination enabled or disabled. Active termination is enabled when a jumper is placed on pins 19 and 20 of the options jumper block. Active termination is disabled when there is no jumper on pins 19 and 20 of the options jumper block.

2.6.2 SCSI address

SCSI ID is set on the ST5660N and ST5660NC using pins 1 and 2, 3 and 4 and 5 and 6 on the options jumper block. The drives are shipped with jumpers on pins 1 and 2 and pins 3 and 4 for configuring the SCSI ID. This means the drives have a default address of SCSI ID 3. You may need to reset the drive’s address for your operation. Refer to your host adapter reference manual for its preferred addressing scheme.

2.6.3 Terminator power source selection

To select the termination power source, install jumpers as follows:

• To select the drive power connector as the termination power source for the resistor packs, install a jumper on pins 23 and 24 of the options jumper block.

• To select the SCSI connector as the termination power source for the resistor packs, install a jumper on pins 21 and 23 of the options jumper block.

• To provide terminator power to the SCSI connector and the drive terminator packs, install jumpers on pins 21 and 23 and pins 22 and 24 of the options jumper block. This is the default.

• To provide terminator power to the SCSI connector from the drive power connector only, install a jumper on pins 22 and 24 of the options jumper block.

SCSI ID 0 SCSI ID 1

SCSI ID 2 SCSI ID 3 SCSI ID 4

SCSI ID 5

Note.

1. All other pins are reserved. Do not use them.

2. Jumpers on pins 28 and 30 and 32 and 34 are spares; these pins do not require jumpers.

SCSI ID 6 SCSI ID 7

Remote LED  connection

Reserved  Do not use

Remote start Parity enable

Terminator  disable

Power from drive power connector

Power from  SCSI bus

Power from drive power connector and to SCSI bus

Power to SCSI bus only

J8. Options jumper block

Circuit board side up.

111291078563

13

1

15161718192021

3334313229302728252623

Spares

Decathlon Family Product Manual, Rev. B 21

Figure 5. Options jumper block (J8) settings

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