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Seagate ST336607LW ST3146807LC Model Product Manual PDF - Page 80

Cheetah 10K.6 SCSI Product Manual, Rev. D, 7.1.3, Cables for low voltage differential drivers/

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70 Cheetah 10K.6 SCSI Product Manual, Rev. D 9.7.1.3 Cables for low voltage differential drivers/receivers The SPI-3 and SPI-4 specification for differential impedance for LVD cables is 122.5 ± 12.5 ohms. The maximum SCSI bus length between the terminators for a SCSI LVD point-to-point system (one initiator and one target) is 25 meters (82 feet). The maximum SCSI bus length between the terminators for a SCSI LVD multidrop system (up to 16 total SCSI devices) is 12 meters (39.37 feet). However, implementation of this 12-meter total length is dependent on the configuration of the system and the choice of cable. See Tables 20 and 21 for examples of recommended SCSI LVD cable types and lengths. It should be noted from the data in Tables 20 and 21 that shielded round twisted-pair cables can be used to implement a 12-meter system, while Twist-n-flat cables cannot be used to implement a 12-meter system due to higher levels of attenuation and crosstalk. In addition, twist-n-flat cables with shorter sections of twist allow greater crosstalk and their lengths must be reduced as shown in Table 21. Table 20: Example shielded round twisted-pair cables - into a multi-drive backplane Differential Single-ended Single-ended Time Cable impedance, impedance, capacitance, delay, description nominal nominal maximum nominal 30 AWG solid 28 AWG stranded 130 ohms 90 ohms 123 ohms 80 ohms 17 pF/ft 19 pF/ft 1.36 ns/ft 1.54 ns/ft 28 AWG stranded 132 ohms 85 ohms 20 pF/ft 1.50 ns/ft Conductor DC Maximum shielded round resistance, twisted-pair cable length nominal for U160/U320 0.113 ohms/ft 0.067 ohms/ft 12 meters minus the SCSI trace length of the backplane 12 meters minus the SCSI trace length of the backplane 0.065 ohms/ft 12 meters minus the SCSI trace length of the backplane Table 21: Example Twist-n-flat cables - into a multi-drive backplane Cable description SingleDifferential ended impedance, impedance, nominal nominal Single-ended Time capacitance, delay, maximum nominal Maximum twist-n-flat Conductor cable length DC resistance, U320 U160 nominal transfer rate transfer rate TPE, 22.25" twist, 1.75" flat, (24" flat to flat), 30 AWG solid tinned copper 131 ohms TPE, 8.1" twist, 1.75" flat, (9.85" flat to flat), 30 AWG solid tinned copper 131 ohms TPE, 4.25" twist, 1.75" flat, (6" flat to flat), 30 AWG solid tinned copper 131 ohms 93 ohms 93 ohms 93 ohms 15.3 pF/ft 15.3 pF/ft 15.3 pF/ft 1.45 ns/ft 0.105 ohms/ft 1.45 ns/ft 0.105 ohms/ft 1.45 ns/ft 0.105 ohms/ft 3.05 meters 6.1 meters (10.0 ft) (20.0 ft) 2.45 meters 4.9 meters (8.33 ft) (16.66 ft) 1.52 meters 3.04 meters (5.0 ft) (10.0 ft) 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 drives, terminator modules can be purchased that plug between the SCSI I/O cable and the drive I/O connector or on the end of a short I/O cable stub extending past the last cable connector. LC drives are designed to be plugged into a backpanel connector without cabling.

Section	Page
1.0 Scope 1	7
2.0 Applicable standards and reference documentation 3	7
2.1 Standards 3	7
2.1.1 Electromagnetic compatibility 3	7
2.1.2 Electromagnetic susceptibility 3	7
2.2 Electromagnetic compliance 3	7
2.3 Reference documents 4	7
3.0 General description 5	7
3.1 Standard features 6	7
3.2 Media characteristics 6	7
3.3 Performance 6	7
3.4 Reliability 6	7
3.5 Unformatted and formatted capacities 7	7
3.6 Programmable drive capacity 7	7
3.7 Factory installed accessories 7	7
3.8 Options (factory installed) 7	7
3.9 Accessories (user installed) 7	7
4.0 Performance characteristics 8	7
4.1 Internal drive characteristics (transparent to user) 8	7
4.2 SCSI performance characteristics (visible to user) 8	7
4.2.1 Access time 8	7
4.2.2 Format command execution time (minutes) 8	7
4.2.3 Generalized performance characteristics 8	7
4.3 Start/stop time 9	7
4.4 Prefetch/multi-segmented cache control 9	7
4.5 Cache operation 9	7
4.5.1 Caching write data 10	7
4.5.2 Prefetch operation 11	7
4.5.3 Optimizing cache performance for desktop and server applications 11	7
5.0 Reliability specifications 13	7
5.1 Error rates 13	7
5.1.1 Environmental interference 13	7
5.1.2 Read errors 13	7
5.1.3 Write errors 13	7
5.1.4 Seek errors 13	7
5.2 Reliability and service 14	7
5.2.1 Mean time between failure 14	7
5.2.2 Preventive maintenance 14	7
5.2.3 Service life 14	7
5.2.4 Service philosophy 14	7
5.2.5 Service tools 14	7
5.2.6 Hot plugging Cheetah 10K.6 SCSI disc drives 15	7
5.2.7 S.M.A.R.T. 15	7
5.2.8 Thermal monitor 16	7
5.2.9 Drive Self Test (DST) 17	7
5.2.10 Product warranty 19	7
6.0 Physical/electrical specifications 21	7
6.1 AC power requirements 21	7
6.2 DC power requirements 21	7
6.2.1 Conducted noise immunity 22	7
6.2.2 Power sequencing 22	7
6.2.3 12 V - Current profile 22	7
6.3 Power dissipation 26	7
6.4 Environmental limits 29	8
6.4.1 Temperature 29	8
6.4.2 Relative humidity 29	8
6.4.3 Effective altitude (sea level) 29	8
6.4.4 Shock and vibration 30	8
6.4.5 Air cleanliness 32	8
6.4.6 Acoustics 32	8
6.4.7 Electromagnetic susceptibility 32	8
6.5 Mechanical specifications 33	8
7.0 Defect and error management 35	8
7.1 Drive internal defects 35	8
7.2 Drive error recovery procedures 35	8
7.3 SCSI systems errors 36	8
8.0 Installation 37	8
8.1 Drive ID/option select header 37	8
8.1.1 Notes for Figures 18, 19, and 20. 40	8
8.1.2 Function description 41	8
8.2 Drive orientation 42	8
8.3 Cooling 42	8
8.4 Drive mounting 43	8
8.5 Grounding 43	8
9.0 Interface requirements 45	8
9.1 General description 45	8
9.2 SCSI interface messages supported 45	8
9.3 SCSI interface commands supported 46	8
9.3.1 Inquiry Vital Product data 49	8
9.3.2 Mode Sense data 50	8
9.4 SCSI bus conditions and miscellaneous features supported 54	8
9.5 Synchronous data transfer 55	8
9.5.1 Synchronous data transfer periods supported 55	8
9.5.2 REQ/ACK offset 55	8
9.6 Physical interface 55	8
9.6.1 DC cable and connector 56	8
9.6.2 SCSI interface physical description 58	8
9.6.3 SCSI interface cable requirements 59	8
9.6.4 Mating connectors 59	8
9.7 Electrical description 68	8
9.7.1 Multimode—SE and LVD alternatives 68	8
9.8 Terminator requirements 70	8
9.9 Terminator power 71	8
9.10 Disc drive SCSI timing 72	8
9.11 Drive activity LED 73	8
10.0 Seagate Technology support services 75	8
Figure 1. Cheetah 10K.6 SCSI family drive (ST3146807LW shown) 1	9
Figure 2. Typical ST3146807drive +12 V current profile 23	9
Figure 3. Typical ST3146807 drive +5 V current profile 23	9
Figure 4. Typical ST373307 drive +12 V current profile 24	9
Figure 5. Typical ST373307 drive +5 V current profile 24	9
Figure 6. Typical ST336607 drive +12 V current profile 25	9
Figure 7. Typical ST336607 drive +5 V current profile 25	9
Figure 8. ST3146807 DC current and power vs. input/output operations per second (SE) 26	9
Figure 9. ST3146807 DC current and power vs. input/output operations per second (LVD) 26	9
Figure 10. ST373307 DC current and power vs. input/output operations per second (SE) 27	9
Figure 11. ST373307 DC current and power vs. input/output operations per second (LVD) 27	9
Figure 12. ST336607 DC current and power vs. input/output operations per second (SE) 28	9
Figure 13. ST336607 DC current and power vs. input/output operations per second (LVD) 28	9
Figure 14. Location of the HDA temperature check point 29	9
Figure 15. Recommended mounting 31	9
Figure 16. LW mounting configuration dimensions 33	9
Figure 17. LC mounting configuration dimensions 34	9
Figure 18. J6 jumper header 38	9
Figure 19. J5 jumper header (on LW models only) 39	9
Figure 20. J2 option select header (on LW models only) 40	9
Figure 21. Air flow (suggested) 42	9
Figure 22. LW model drive physical interface (68-pin J1 SCSI I/O connector) 57	9
Figure 23. LC model drive physical interface (80-pin J1 SCSI I/O connector) 57	9
Figure 24. SCSI daisy chain interface cabling for LW drives 61	9
Figure 25. Nonshielded 68-pin SCSI device connector used on LW drives 62	9
Figure 26. Nonshielded 80-pin SCSI “SCA-2” connector, used on LC drives 63	9
Figure 27. Typical SE-LVD alternative transmitter receiver circuits 69	9
1.0 Scope	11
2.0 Applicable standards and reference documentation	13
2.1 Standards	13
2.1.1 Electromagnetic compatibility	13
2.1.2 Electromagnetic susceptibility	13
2.2 Electromagnetic compliance	13
2.3 Reference documents	14
3.0 General description	15
3.1 Standard features	16
3.2 Media characteristics	16
3.3 Performance	16
3.4 Reliability	16
3.5 Unformatted and formatted capacities	17
3.6 Programmable drive capacity	17
3.7 Factory installed accessories	17
3.8 Options (factory installed)	17
3.9 Accessories (user installed)	17
4.0 Performance characteristics	18
4.1 Internal drive characteristics (transparent to user)	18
4.2 SCSI performance characteristics (visible to user)	18
4.2.1 Access time [5]	18
4.2.2 Format command execution time (minutes) [1]	18
4.2.3 Generalized performance characteristics	18
4.3 Start/stop time	19
4.4 Prefetch/multi-segmented cache control	19
4.5 Cache operation	19
4.5.1 Caching write data	20
4.5.2 Prefetch operation	21
4.5.3 Optimizing cache performance for desktop and server applications	21
5.0 Reliability specifications	23
5.1 Error rates	23
5.1.1 Environmental interference	23
5.1.2 Read errors	23
5.1.3 Write errors	23
5.1.4 Seek errors	23
5.2 Reliability and service	24
5.2.1 Mean time between failure	24
5.2.2 Preventive maintenance	24
5.2.3 Service life	24
5.2.4 Service philosophy	24
5.2.5 Service tools	24
5.2.6 Hot plugging Cheetah 10K.6 SCSI disc drives	25
5.2.7 S.M.A.R.T.	25
5.2.8 Thermal monitor	26
5.2.9 Drive Self Test (DST)	27
5.2.9.1 DST Failure Definition	27
5.2.9.2 Implementation	28
5.2.9.2.1 State of the drive prior to testing	28
5.2.9.2.2 Invoking DST	28
5.2.9.2.3 Short and extended tests	28
5.2.9.2.4 Log page entries	28
5.2.9.2.5 Abort	29
5.2.10 Product warranty	29
6.0 Physical/electrical specifications	31
6.1 AC power requirements	31
6.2 DC power requirements	31
6.2.1 Conducted noise immunity	32
6.2.2 Power sequencing	32
6.2.3 12 V - Current profile	32
6.3 Power dissipation	36
6.4 Environmental limits	39
6.4.1 Temperature	39
6.4.2 Relative humidity	39
6.4.3 Effective altitude (sea level)	39
6.4.4 Shock and vibration	40
6.4.4.1 Shock	40
6.4.4.2 Vibration	42
6.4.5 Air cleanliness	42
6.4.6 Acoustics	42
6.4.7 Electromagnetic susceptibility	42
6.5 Mechanical specifications	43
7.0 Defect and error management	45
7.1 Drive internal defects	45
7.2 Drive error recovery procedures	45
7.3 SCSI systems errors	46
8.0 Installation	47
8.1 Drive ID/option select header	47
8.1.1 Notes for Figures 18, 19, and 20.	50
8.1.2 Function description	51
8.2 Drive orientation	52
8.3 Cooling	52
8.4 Drive mounting	53
8.5 Grounding	53
9.0 Interface requirements	55
9.1 General description	55
9.2 SCSI interface messages supported	55
9.3 SCSI interface commands supported	56
9.3.1 Inquiry Vital Product data	59
9.3.2 Mode Sense data	60
9.4 SCSI bus conditions and miscellaneous features supported	64
9.5 Synchronous data transfer	65
9.5.1 Synchronous data transfer periods supported	65
9.5.2 REQ/ACK offset	65
9.6 Physical interface	65
9.6.1 DC cable and connector	66
9.6.2 SCSI interface physical description	68
9.6.3 SCSI interface cable requirements	69
9.6.3.1 Cable requirements	69
9.6.4 Mating connectors	69
9.6.4.1 Mating connectors for LW model drives	69
9.6.4.2 Mating connectors for LC model drives	70
9.7 Electrical description	78
9.7.1 Multimode—SE and LVD alternatives	78
9.7.1.1 General cable characteristics	79
9.7.1.2 Single-ended drivers/receivers	79
9.7.1.3 Cables for low voltage differential drivers/receivers	80
9.8 Terminator requirements	80
9.9 Terminator power	81
9.10 Disc drive SCSI timing	82
9.11 Drive activity LED	83
10.0 Seagate Technology support services	85
Symbols	89
Numerics	89
A	89
B	89
C	89
D	89
E	90
F	90
G	90
H	90
I	91
J	91
L	91
M	91
N	91
O	91
P	92
R	92
S	92
T	93
U	93
V	93
W	93

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Cheetah 10K.6 SCSI Product Manual, Rev. D

9.7.1.3

Cables for low voltage differential drivers/receivers

The SPI-3 and SPI-4 specification for differential impedance for LVD cables is 122.5 ± 12.5 ohms.

The maximum SCSI bus length between the terminators for a SCSI LVD point-to-point system (one initiator

and one target) is 25 meters (82 feet).

The maximum SCSI bus length between the terminators for a SCSI LVD multidrop system (up to 16 total SCSI

devices) is 12 meters (39.37 feet). However, implementation of this 12-meter total length is dependent on the

configuration of the system and the choice of cable. See Tables 20 and 21 for examples of recommended SCSI

LVD cable types and lengths.

It should be noted from the data in Tables 20 and 21 that shielded round twisted-pair cables can be used to

implement a 12-meter system, while Twist-n-flat cables cannot be used to implement a 12-meter system due to

higher levels of attenuation and crosstalk. In addition, twist-n-flat cables with shorter sections of twist allow

greater crosstalk and their lengths must be reduced as shown in Table 21.

9.8

Terminator requirements

Caution:

These drives do not have onboard internal terminators. The user, systems integrator or host equip-

ment manufacturer must provide a terminator arrangement external to the drive when termination is

required. For LW drives, terminator modules can be purchased that plug between the SCSI I/O

cable and the drive I/O connector or on the end of a short I/O cable stub extending past the last

cable connector. LC drives are designed to be plugged into a backpanel connector without cabling.

Table 20:

Example shielded round twisted-pair cables - into a multi-drive backplane

Cable

description

Differential

impedance,

nominal

Single-ended

impedance,

nominal

Single-ended

capacitance,

maximum

Time

delay,

nominal

Conductor DC

resistance,

nominal

Maximum shielded round

twisted-pair cable length

for U160/U320

30 AWG

solid

130 ohms

90 ohms

17 pF/ft

1.36 ns/ft

0.113 ohms/ft

12 meters minus the SCSI

trace length of the backplane

28 AWG

stranded

123 ohms

80 ohms

19 pF/ft

1.54 ns/ft

0.067 ohms/ft

12 meters minus the SCSI

trace length of the backplane

28 AWG

stranded

132 ohms

85 ohms

20 pF/ft

1.50 ns/ft

0.065 ohms/ft

12 meters minus the SCSI

trace length of the backplane

Table 21:

Example Twist-n-flat cables - into a multi-drive backplane

Cable

description

Differential

impedance,

nominal

Single-

ended

impedance,

nominal

Single-ended

capacitance,

maximum

Time

delay,

nominal

Conductor

resistance,

nominal

Maximum twist-n-flat

cable length

U320

transfer rate

U160

transfer rate

TPE, 22.25” twist,

1.75” flat, (24” flat

to flat), 30 AWG

solid tinned copper

131 ohms

93 ohms

15.3 pF/ft

1.45 ns/ft

0.105

ohms/ft

3.05 meters

(10.0 ft)

6.1 meters

(20.0 ft)

TPE, 8.1” twist,

1.75” flat, (9.85” flat

to flat), 30 AWG

solid tinned copper

131 ohms

93 ohms

15.3 pF/ft

1.45 ns/ft

0.105

ohms/ft

2.45 meters

(8.33 ft)

4.9 meters

(16.66 ft)

TPE, 4.25” twist,

1.75” flat, (6” flat to

flat), 30 AWG solid

tinned copper

131 ohms

93 ohms

15.3 pF/ft

1.45 ns/ft

0.105

ohms/ft

1.52 meters

(5.0 ft)

3.04 meters

(10.0 ft)