Seagate MEDIALIST 1080SL Product manual

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Medalist 1080sl

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SCSI Interface Drive

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Product Manual

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Medalist 1080sl

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SCSI Interface Drive

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Product Manual

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Publication Number: 36321-101, Rev. A, August 1995

Seagate, Seagate Technology and the Seagate logo are registered trademarks of Seagate Technology, Inc. MedalistSL is a trademark 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.

Medalist 1080sl SCSI Product Manual, August 1995 iii

Contents

Introduction . . . . . . .	. . . . . . . . . . . . . . . . .	. .	. .	.	1
Quick specification chart	. . . . . . . . . . . . . . . . .	. .	. .	.	2

1.0Specifications summary . . . . . . . . . . . . . . . . . . . . . 4

1.1Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Physical geometry . . . . . . . . . . . . . . . . . . . . . . . 4

1.3Functional specifications . . . . . . . . . . . . . . . . . . . . 4

1.4Physical dimensions . . . . . . . . . . . . . . . . . . . . . . 5

1.5Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.5.1 Read look-ahead and caching . . . . . . . . . . . . . . 5

1.6Start and stop time . . . . . . . . . . . . . . . . . . . . . . . 6

1.6.1Power-up sequence . . . . . . . . . . . . . . . . . . . . 6

1.6.2 Power-down sequence		. . . . . . . . . . . . . . . . . . 7
1.6.3 Auto-park . . . . . .	.	.	. .	. . . . . . . . . .	. .	. .	.	7
1.7 Power management . . .	.	.	. .	. . . . . . . . . .	. .	. .	.	7

1.7.1	Power consumption .	. .	. .	. . . . . . . . . .	. .	. .	.	8
1.7.2	Voltage tolerance . .	. .	. .	. . . . . . . . . .	. .	. .	.	8

1.7.3Input noise . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.8Environmental . . . . . . . . . . . . . . . . . . . . . . . . . 9


1.8.1 Ambient temperature	. . . . . . . . . . . . . . . . . . . 9
1.8.2 Temperature gradient . . . . . . . . . . . . . . . . . . .			9
1.8.3 Altitude . . . . . . .	. . . . . . . . . . . . . . . . . . .		9
1.8.4 Relative humidity . .	. . . . . . . . . . . . . . . . . .	10
1.9 Shock and vibration . . .	. . . . . . . . . . . . . . . . . .	10

1.10Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.11Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.12	Agency listings . . . . . . . . . . . . . . . . . . . . . . .	11
1.13	FCC verification . . . . . . . . . . . . . . . . . . . . . . .	11


iv	Medalist 1080sl SCSI Product Manual, August 1995
2.0 Hardware and interface . . . . . . . . . . . . . . . . . . . .		15
2.1	SCSI-2 compatibility . . . . . . . . . . . . . . . . . . . . .	15
2.2	Handling and static-discharge precautions . . . . . . . . .	15
2.3	Electrical interface . . . . . . . . . . . . . . . . . . . . . .	16
2.4	SCSI interface connector . . . . . . . . . . . . . . . . . .	17
2.4.1 SCSI interface connector pin assignments . . . . . . .		18
2.5	Interface cable requirements . . . . . . . . . . . . . . . . .	19
2.5.1 Interface cable length for asynchronous operation . . .		21

2.5.2Interface cable for Fast SCSI operation . . . . . . . . . 21

2.6Options jumper block . . . . . . . . . . . . . . . . . . . . . 21

2.6.1SCSI address . . . . . . . . . . . . . . . . . . . . . . 22

2.6.2 Active Termination . . . . . . . . . . . . . . . . . . . 22

2.6.3Terminator power source selection . . . . . . . . . . . 22

2.6.4Parity enable option . . . . . . . . . . . . . . . . . . . 23

2.6.5Start/stop option . . . . . . . . . . . . . . . . . . . . . 23

2.6.6 Remote LED connection . . . . . . . . . . . . . . . . 23

2.7Daisy chaining . . . . . . . . . . . . . . . . . . . . . . . . 23

2.8Hot-plugging . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.9 Mounting the drive . . . . . . . . . . . . . . . . . . . . . .	24
3.0 Command set . . . . . . . . . . . . . . . . . . . . . . . . .	27

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

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

3.3	Supported commands . . . . . . . . . . . . . . . . . . . .	29
3.4	Group 0 commands . . . . . . . . . . . . . . . . . . . . .	30
3.4.1 Test Unit Ready command (00H) . . . . . . . . . . . .		30
3.4.2 Rezero Unit command (01H) . . . . . . . . . . . . . .		30
3.4.3 Request Sense command (03H) . . . . . . . . . . . .		30
3.4.4 Format Unit command (04H) . . . . . . . . . . . . . .		32

3.4.5Reassign Blocks command (07H) . . . . . . . . . . . . 37

3.4.6Read command (08H) . . . . . . . . . . . . . . . . . . 39

3.4.7Write command (0AH) . . . . . . . . . . . . . . . . . . 40

Medalist 1080sl SCSI Product Manual, August 1995

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

3.4.9Inquiry command (12H) . . . . . . . . . . . . . . . . . 41

3.4.10 Mode Select command (15H) . . . . . . . . . . . . .	42
3.4.11 Reserve command (16H) . . . . . . . . . . . . . . .	45
3.4.12 Release command (17H) . . . . . . . . . . . . . . . .	46
3.4.13 Mode Sense command (1AH) . . . . . . . . . . . . .	47
3.4.14 Start/Stop Unit command (1BH) . . . . . . . . . . . .	50
3.4.15 Receive Diagnostic Results command (1CH) . . . . .	51
3.4.16 Send Diagnostic command (1DH) . . . . . . . . . . .	52
3.5 Group 1 commands . . . . . . . . . . . . . . . . . . . . .	53
3.5.1 Read Capacity command (25H) . . . . . . . . . . . . .	53
3.5.2 Read Extended command (28H) . . . . . . . . . . . .	54
3.5.3 Write Extended command (2AH) . . . . . . . . . . . .	55
3.5.4 Seek Extended command (2BH) . . . . . . . . . . . .	57
3.5.5 Write and Verify command (2EH) . . . . . . . . . . . .	57
3.5.6 Verify command (2FH) . . . . . . . . . . . . . . . . .	58
3.5.7 Read Defect Data command (37H) . . . . . . . . . . .	58
3.5.8 Write Data Buffer command (3BH) . . . . . . . . . . .	60
3.5.9 Read Data Buffer command (3CH) . . . . . . . . . . .	62
3.5.10 Read Long command (3EH) . . . . . . . . . . . . . .	63
3.5.11 Write Long command (3FH) . . . . . . . . . . . . . .	63

3.6Group 2, 3 and 4 commands . . . . . . . . . . . . . . . . . 64

3.7Group 5 and 6 commands . . . . . . . . . . . . . . . . . . 64

3.8 Group 7 commands . . . . . . . . . . . . . . . . . . . . .		65
Appendix A. Supported messages . . . . . . . . . . . . . . . .		67
A.1	Single-byte messages . . . . . . . . . . . . . . . . . . . .	67
A.2	Synchronous data transfer request message (01H) . . . . .	67
Appendix B. Sense data . . . . . . . . . . . . . . . . . . . . . .		69
B.1	Additional sense data . . . . . . . . . . . . . . . . . . . .	69
B.2	Sense key . . . . . . . . . . . . . . . . . . . . . . . . . .	70
B.3	Additional sense code and additional sense code qualifier .	72


vi	Medalist 1080sl SCSI Product Manual, August 1995
Appendix C. Mode pages . . . . . . . . . . . . . . . . . . . . .		77
C.1	Error Recovery page (01H) . . . . . . . . . . . . . . . . .	79
C.2	Disconnect/Reconnect page (02H) . . . . . . . . . . . . .	81
C.3	Format Device page (03H) . . . . . . . . . . . . . . . . . .	82
C.4	Rigid Disc Geometry page (04H) . . . . . . . . . . . . . .	85
C.5	Verify error recovery page (07H) . . . . . . . . . . . . . . .	87
C.6	Caching page (08H) . . . . . . . . . . . . . . . . . . . . .	89
C.6.1 Read look-ahead and caching . . . . . . . . . . . . .		89
C.6.2 Write caching and write merging . . . . . . . . . . . .		89
C.6.3 Caching page description . . . . . . . . . . . . . . . .		90
C.7	Control Mode page (0AH) . . . . . . . . . . . . . . . . . .	93
C.8	Notch page (0CH) . . . . . . . . . . . . . . . . . . . . . .	95
C.9	Cache Control page (38H) . . . . . . . . . . . . . . . . . .	97
C.10 Soft ID page (Flash memory) (3CH) . . . . . . . . . . . .		98
C.11 Operating page (Flash memory) (00H) . . . . . . . . . . .		99
Appendix D. Inquiry data . . . . . . . . . . . . . . . . . . . .		101
D.1	Inquiry data . . . . . . . . . . . . . . . . . . . . . . . .	101
D.2	Vital product data pages . . . . . . . . . . . . . . . . . .	104
D.2.1 Unit Serial Number page (80H) . . . . . . . . . . . .		105
D.2.2 Implemented Operating Definition page (81H) . . . .		105
D.2.3 Firmware Numbers page (C0H) . . . . . . . . . . . .		106
D.2.4 Date Code page (C1H) . . . . . . . . . . . . . . . .		107
D.2.5 Jumper Settings page (C2H) . . . . . . . . . . . . .		107
Appendix E. Timing diagrams . . . . . . . . . . . . . . . . . .		109

Medalist 1080sl SCSI Product Manual, August 1995 vii

Figures

Figure 1. Typical startup current profile . . . . . . . . . . . . . . . . 6

Figure 2.	Single-ended transmitter and receiver . . . . . . . . . .	16
Figure 3.	ST51080N connectors . . . . . . . . . . . . . . . . . .	17
Figure 4.	Options jumper block settings . . . . . . . . . . . . . .	20
Figure 5.	ST51080N mounting dimensions . . . . . . . . . . . . .	25

Figure 6. Arbitration, selection (without ATN) and command . . . 109 Figure 7. Arbitration, selection (with ATN) and message out . . . 110

Figure 8.	Identify message out to command . . . . . . . . . . .		111
Figure 9.	Command descriptor block transfer . . . . . . . . . .		112
Figure 10. Command, status, command complete message and
		bus free . . . . . . . . . . . . . . . . . . . . . . . .	113
Figure 11. Last command byte, disconnect message, bus free
		and reselection . . . . . . . . . . . . . . . . . . . .	114
Figure 12.		Arbitration, reselection and message in . . . . . . . .	115
Figure 13. Reselection, status, command complete and bus free			116
Figure 14.		Last command byte to data in . . . . . . . . . . . . .	117
Figure 15.		Last command byte to data out . . . . . . . . . . . .	118
Figure 16.		Reselect identify message to data in . . . . . . . . .	119
Figure 17.		Data in block transfer . . . . . . . . . . . . . . . . .	120
Figure 18.		Data out block transfer . . . . . . . . . . . . . . . .	121
Figure 19. Last data byte, save pointer message and
		disconnect message . . . . . . . . . . . . . . . . .	122
Figure 20. Data in, status, command complete message and
		bus free . . . . . . . . . . . . . . . . . . . . . . . .	123
Figure 21. Synchronous timing . . . . . . . . . . . . . . . . . .			124
Figure 22.		Synchronous write timing . . . . . . . . . . . . . . .	125

Medalist 1080sl SCSI Product Manual, August 1995

Introduction

This manual describes the functional, mechanical and interface specifications for the Medalist 1080sl SCSI hard disc drive. The Medalist 1080sl SCSI is referred to throughout this manual by its model number, ST51080N.

The ST51080N is a high-capacity, high-performance, energy-efficient SCSI drive that comes in the mini 3.5-inch form-factor.

The drive uses a high-performance SCSI-2 interface that supports an asynchronous external transfer rate of up to 5 Mbytes per second and a synchronous external transfer rate of up to 10 Mbytes per second.

The interface is supported with a 128-Kbyte segmented cache and embedded servo technology. The segmented cache aids the flow of read and write data. The embedded servo allows for accurate positioning of the heads over the data and eliminates periodic thermal recalibration to assure data transfer without interruption.

The ST51080N conforms to the standard 3.5-inch footprint but have a 0.75-inch (19 mm) height profile and a 5.0-inch depth profile. The lower height and shorter depth gives the designer or integrator more room for air circulation, other peripherals or a smaller drive bay.

The following is a summary of the drive’s features:

Capacity

∙ 1.08 Gbytes formatted

Performance

∙Uses the SCSI-2 interface

∙5,376-RPM rotational speed

∙128-Kbyte segmented buffer

∙12.5-msec average seek time

Acoustics

∙ 30-dBA idle acoustic sound level

Mini 3.5-inch form-factor

∙19-mm height profile

∙Fits standard 3.5-inch footprint

2	Medalist 1080sl SCSI Product Manual, August 1995

Quick specification chart

The following table serves as a quick reference for the ST51080N performance specifications. These and other specifications are discussed in the Specification summary section following the table.

Drive specification	ST51080N


Formatted capacity (Mbytes) (×106 bytes)	1,080.23
Total sectors	2,109,840

Bytes per sector	512

Sectors per track (average)	115

Physical cylinders	4,826

Physical read/write heads	4

Physical disc	2

Recording density (bits per inch, max)	73,344

Track density (tracks per inch)	4,923

Spindle speed (RPM)	5,376 ± 0.5%

Internal data-transfer rate (Mbits per second max)	33 MHz to 65 MHz

External transfer rate (Mbytes per second max)	5.0 asynchronous
	10.0 synchronous

Cache buffer (Kbytes)	128

Height, inches max (mm)	0.748 (19.0)

Width, inches max (mm)	4.01 (102.8)

Depth, inches max (mm)	5.00 (127.0)

Typical weight, lb (g)	0.750 (340.2)

Track-to-track seek time read (msec typical)	3.5

Track-to-track seek time write (msec typical)	4.5

Average seek time read (msec typical)	12.5

Average seek time write (msec typical)	15.5

Full-stroke seek time read (msec typical)	25.0

Full-stroke seek time write (msec typical)	27

Average latency (msec)	5.6

Power-on to ready (sec typical)	20

continued

Medalist 1080sl SCSI Product Manual, August 1995		3
continued from previous page

Drive specification	ST51080N


Spinup current: +12V (max)	1.32A

Seek power (typical)	7.11W

Read/Write power (typical)	5.14W

Idle power (typical)	4.9W

Voltage tolerance (including noise): +5V	±5%

Voltage tolerance (including noise): +12V	±5%

Ambient temperature, operating (°C)	5° to 55°C

Temperature gradient , operating (°C per hour max)	20°C

Relative humidity, operating gradient (max)	10% per hr

Relative humidity, operating	8% to 80%

Wet bulb temperature, operating (noncondensing)	29.4°C

Altitude, operating	–1,000 to 10,000 ft.

Shock, normal operating (Gs max for 11 msec)	2 Gs

Vibration (Gs max at 22–350 Hz without nonrecoverable	0.75 Gs
errors), operating	0 to Peak

Vibration (Gs max at 22–350 Hz with no physical damage	4 Gs
incurred), nonoperating	0 to Peak

Drive acoustics, Idle mode (dBA)	30 dBA

Drive acoustics, seeking (dBA)	34 dBA

Nonrecoverable read errors	1013
(per bits transferred)

Mean time between failures (power-on hours)	300,000

Contact start-stop cycles	40,000

Service life (years)	5

4	Medalist 1080sl SCSI Product Manual, August 1995

1.0Specifications summary

1.1Formatted 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 (Mbytes1)	1080.23
Total sectors	2,109,840

1.2Physical geometry

Discs	2
Read/write heads	4
Cylinders	4,826

1.3Functional specifications

Interface	Fast SCSI-2
Zone Bit Recording method	RLL (1,7)
External data transfer rate	5.0 asynchronous
(Mbytes per sec, max)	10.0 synchronous
Internal data transfer rate	33 to 65
(Mbits per sec)
Spindle speed (RPM)	5,376 ± 0.5%
Bytes per sector	512
Track density (TPI)	4,923
Recording density	73,344
(BPI, max)

1. One Mbyte equals 1,000,000 bytes.

Medalist 1080sl SCSI Product Manual, August 1995

1.4Physical 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)	0.75 lb (340.2 g)

1.5Seek 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 seek time is the average of all possible single-track seeks in both directions.

∙Average/typical seek time is a true statistical random average of at least 5,000 measurements of seeks in both directions between random cylinders, less overhead.

∙Full-stroke seek time is one-half the time needed to seek from logical block address zero (LBA 0) to the maximum LBA and back to LBA 0.

Track-to-track	Average/typical	Full-stroke	Average
seek time typ2	seek time3	seek time typ4	latency
4.5 msec read	12.5 msec read	25.0 msec read	5.6 msec
3.5 msec write	15.5 msec write	27.0 msec write

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.

1.5.1Read 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.6.

2.All possible one track seeks are divided into the time required to perform those seeks. Only the mechanism time is used; interface overhead is excluded.

3.All possible seeks are divided into the time required to perform those seeks. Only the mechanism time is used; interface overhead is excluded.

4.The average of 1000 full stroke seeks is used in this computation. Only the mechanism time is used; interface overhead is excluded.

6	Medalist 1080sl SCSI Product Manual, August 1995

1.6Start 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.

Amps
1.2
		T2
1.0
0.8			T3
0.8
					T4		T5
0.6
0.4								T6
								T6
0.2									T7
0.2
T1
0
0	1	2	3	4	5	6	7	8	9
				Seconds

Figure 1. Typical startup current profile

1.6.1Power-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 1 second.

3.Depending on whether there is a jumper installed on pins 15 and 16 of the options jumper block (J8) shown in Figure 3 on page 17, 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.

Medalist 1080sl SCSI Product Manual, August 1995

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.

1.6.2Power-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 a 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.

1.6.3Auto-park

Upon power-down, the read/write heads automatically move to the landing zone. The heads park beyond 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.

1.7Power 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.

8	Medalist 1080sl SCSI Product Manual, August 1995

∙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 2- revolution (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.

∙Idle. The motor is up to speed and the drive is in track follow mode.

1.7.1Power consumption

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

	During		Read/
	Spinup	Seeking	Write	Idle
Current at +12V
Amps peak	1.32	—	—	—
RMS amps typ	—	0.393	0.221	0.219
Watts typ	—	4.72	2.65	2.63
Current at +5V
RMS amps typ	—	0.477	0.498	0.471
Watts typ	—	2.39	2.49	2.36
Power
Total watts typ	—	7.11	5.14	4.99

1.7.2Voltage tolerance

	+5V	+12V
Voltage tolerance	± 5%	± 5%
(including noise)

Medalist 1080sl SCSI Product Manual, August 1995

1.7.3Input noise

	+5V	+12V
Voltage tolerance	± 5%	± 5%
(including noise)
Input noise frequency	25 MHz	25 MHz
(max)
Input noise	100 mV	240 mV
(max, peak-to-peak)

1.8Environmental

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.

1.8.1Ambient temperature

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

1.8.2Temperature gradient

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

1.8.3Altitude

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)

10	Medalist 1080sl SCSI Product Manual, August 1995

1.8.4Relative humidity

Operating	8% to 80% noncondensing
	Maximum wet bulb 29.4°C (84.9°F)
Operating gradient, max	10% per hour
Nonoperating	5% to 95% noncondensing
	Maximum wet bulb 35°C (95.0°F)

1.9Shock 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	Abnormal	Nonoperating
	operating	operating	Nonoperating
Shock	2 Gs	10 Gs	75 Gs
5–22 Hz vibration	0.020-inch	0.030-inch	0.160-inch
	displacement	displacement	displacement
22–350 Hz vibration	0.50 Gs	0.75 Gs	4.00 Gs

1.10 Acoustics

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

	Idle	Seek
Sound pressure, typ	30 dBA	34 dBA
Sound pressure, max	34 dBA	38 dBA

Medalist 1080sl SCSI Product Manual, August 1995

1.11 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 1013 bits transferred
Seek errors	1 per 107 physical seeks
MTBF	300,000 power-on hours
Service life	5 years

1.12 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. 950M1989

∙Certified to VDE 0806/05.90 and EN 60950/1.88 as tested by VDE

1.13 FCC verification

The ST51080N drive is 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

12	Medalist 1080sl SCSI Product Manual, August 1995

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.

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 auxappareils numériquesde Classe B prescrites dans le règlement sur le brouillage radioélectrique édicté par le Ministère des Communications du Canada.

Sicherheitsanleitung

1.Das Gerrät ist einEinbaugerät, das für eine maximale Um gebungstemperatur 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 benöt igt: +5V ± 5% 0,65A

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

4.Die Versorgungsspannung muss SELV entsprechen.

Medalist 1080sl SCSI Product Manual, August 1995

5.Alle Arbeiten auf dem Festplatte dürfen nur von Ausgebildetem Servicepersonal durchgeführt werden. Bitte schaffen Sie Festplatteetiketten nicht weg.

6.Der Einbaudes Drives muss den Anforderungen gemäss DIN IEC 950V DC 0805/05.90 entsprechen.

Medalist 1080sl SCSI Product Manual, August 1995

2.0 Hardware and interface

The ST51080N drive uses 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-con- figuring 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.

2.1SCSI-2 compatibility

The drive interface is described in the Seagate SCSI-2 Interface Manual, 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 X3.131-199x (X3T9.2/86-109 Rev. 10h).

2.2Handling and static-discharge precautions

The ST51080N drive uses static-sensitive devices. Avoid damaging the drive and these devices by observing the following standard handling and static-discharge precautions:

∙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.

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

16	Medalist 1080sl SCSI Product Manual, August 1995

∙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.

2.3Electrical interface

The ST51080N drive is 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 singleended 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)	0.0V ≤ x ≤ 0.4V	0.0V ≤ x ≤ 0.8V
Negated (0)	2.5V ≤ x ≤ 5.25V	2.0V ≤ x ≤ 5.25V
Line driver	+2.85V	+2.85V Line receiver
(transmitter or transceiver)	110	110
	ohms	ohms
	Flat cable pair
ANSI SCSI		ANSI SCSI
ANSI SCSI		compatible
compatible circuit		compatible
compatible circuit		circuit
		circuit

Figure 2. Single-ended transmitter and receiver

Medalist 1080sl SCSI Product Manual, August 1995

J8. Options jumper block

pin 1

Standard power connector

+5V

Interface connector

Circuit board

+5V return

+12V return

+12V

Figure 3. ST51080N connectors

2.4SCSI interface connector

The ST51080N 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. 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.

	Without strain relief	With strain relief
	Without center key	No center key
Closed end	3M	3M
(for cable ends)	3425-7000	3425-7050
Open end	3M	3M
(for daisy chain)	3425-6000	3425-6050

18	Medalist 1080sl SCSI Product Manual, August 1995

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

Closed end	Molex
(for cable ends)	39-51-2504
Open end	Molex
(for daisy chain)	39-51-2501

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

Molex strain relief,	Molex 90170-0050
preferred version
in Europe
Molex strain relief,	Molex 15-25-1503
preferred version
in Japan

2.4.1SCSI 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	Ground
Signal name	pin number	pin number
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	—

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	Signal	Ground
Signal name	pin number	pin number
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.

2.5Interface 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.

20	Medalist 1080sl SCSI Product Manual, August 1995
	J8. Options jumper block				Circuit board
	33 31 29 27 25 23 21 19 17 15 13 11 9 7	5	3	1	side up.
	34 32 30 28 26 24 22 20 18 16 14 12 10 8	6	4	2

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.

Spares

SCSI ID 0

SCSI ID 1

SCSI ID 2

SCSI ID 3

SCSI ID 4

SCSI ID 5

SCSI ID 6

SCSI ID 7

Reserved

Do not use

Remote LED connection

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

Figure 4. Options jumper block settings

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