seagate ST9655AG, ST9385AG, ST9550AG User manual

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ST9655 Family

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ST9655AG, ST9550AG

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ST9385AG

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ATA Interface Drives

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Product Manual

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ST9655 Family

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ST9655AG, ST9550AG

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ST9385AG

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ATA Interface Drives

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Product Manual

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September 1994 Seagate

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

ST9655 Family Product Manual, Rev. A iii

Contents

1.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . 1

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

1.2 Physical organizat ion . . . . . . . . . . . . . . . . . . . . 1

1.3 Logical organization . . . . . . . . . . . . . . . . . . . . . 1

1.4 Default logical geometry . . . . . . . . . . . . . . . . . . . 1

1.5 Recording and interface technology . . . . . . . . . . . . . 2

1.6 Physical dimens ions . . . . . . . . . . . . . . . . . . . . . 2

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

1.8 Start times . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.9 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.10 Drive acoustics . . . . . . . . . . . . . . . . . . . . . . . 4

1.11 Environment . . . . . . . . . . . . . . . . . . . . . . . . 4

1.11.1 Ambient temperature . . . . . . . . . . . . . . . . . 4

1.11.2 Temperature gradient . . . . . . . . . . . . . . . . . 4

1.11.3 Relative humidity . . . . . . . . . . . . . . . . . . . 4

1.11.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . 4

1.11.5 Shock . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.11.6 Vibration . . . . . . . . . . . . . . . . . . . . . . . . 5

1.12 Power specifications . . . . . . . . . . . . . . . . . . . . 6

1.12.1 Power management . . . . . . . . . . . . . . . . . . 6

1.12.2 Power consumption . . . . . . . . . . . . . . . . . . 8

1.12.3 Conducted noise . . . . . . . . . . . . . . . . . . . 10

1.12.4 Voltage tolerance . . . . . . . . . . . . . . . . . . . 10

1.13 Agency certification . . . . . . . . . . . . . . . . . . . . 10

1.13.1 UL/CSA listing . . . . . . . . . . . . . . . . . . . . . 10

1.13.2 FCC verification . . . . . . . . . . . . . . . . . . . . 10

1.14 Compatibility notes . . . . . . . . . . . . . . . . . . . . . 11

1.14.1 ECC testing . . . . . . . . . . . . . . . . . . . . . . 11

iv ST9655 Family Product Manual, Rev. A

2.0 Drive mounting and configuration . . . . . . . . . . . . . . 13

2.1 Handling and static-discharge precautions . . . . . . . . . 13

2.2 Mounting the ST9655 family drives . . . . . . . . . . . . . 13

2.3 Master/slave configuration . . . . . . . . . . . . . . . . . . 15

2.4 Configuring a remote LED . . . . . . . . . . . . . . . . . . 15

3.0 ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.1 ATA interface connector . . . . . . . . . . . . . . . . . . . 17

3.2 ATA interface signals and connector pins . . . . . . . . . . 18

3.2.1 AT bus signal levels . . . . . . . . . . . . . . . . . . 19

3.3 ATA interface commands . . . . . . . . . . . . . . . . . . 20

3.3.1 Identify Drive command . . . . . . . . . . . . . . . . 22

3.3.2 Set Features command . . . . . . . . . . . . . . . . . 26

3.3.3 Rest/Resume commands . . . . . . . . . . . . . . . . 27

ST9655 Family Product Manual, Rev. A v

Figures

Figure 1. Typical startup and operation current profile for the

ST9655AG . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 2. Typical startup and operation current profile for the

ST9550AG and ST9385AG . . . . . . . . . . . . . . . . 9

Figure 3. Mounting dimensions for the ST9655 family drives . . . . 14

Figure 4. Master/slave jumpers for the ST9655 family drives . . . . 16

Figure 5. ATA interface connector for the ST9655 family drives . . 17

ST9655 Family Product Manual, Rev. A 1

1.0 Drive specifications

1.1 Formatted capacity

ST9655AG ST9550AG ST9385AG

Guaranteed Mbytes (1 Mbyte = 10

Guaranteed sectors 1,024,128 889,248 666,876 Bytes per sector 512 512 512

bytes)

524 455 341

1.2 Physical organization

ST9655AG ST9550AG ST9385AG

Read/Write heads 8 8 6 Discs 4 4 3

1.3 Logical organization

The ST9655 family drives support all head, cylinder and sector geometries, subject to the maximums specified below, and to the following condition:

sectors

(

Sectors per track (max) 64 64 64

) × (

heads

) ×

(cylinder

s) ≤

total sectors per drive

ST9655AG ST9550AG ST9385AG

Read/Write heads (max) 16 16 16 Cylinders (max) 1,024 1,024 1,024

1.4 Default logical geometry

ST9655AG ST9550AG ST9385AG

Sectors per track 63 59 51 Read/Write heads 16 16 14 Cylinders 1,016 942 934

2 ST9655 Family Product Manual, Rev. A

1.5 Recording and interface technology

Specification ST9655AG ST9550AG ST9385AG

Interface ATA ATA ATA Recording method RLL (1,7) RLL (1,7) RLL (1,7) Recording density (BPI) 72,100 59,124 59,124 Flux density (FCI) 44,360 44,360 44,360 Track density (TPI) 3,227 3,282 3,282 Spindle speed (RPM ± 0.5%) Internal data transfer rate

(Mbits per sec max—ZBR) I/O data transfer rate (Mbytes per sec max)

PIO Mode 3 with IORDY

Multiword DMA Mode 1 Interleave 1:1 1:1 1:1 Cache buffer (Kbytes) 120 120 120

3,980 3,980 3,980

28.26 27.28 27.28

11.1

13.3

8.0

13.3

8.0

13.3

1.6 Physical dimensions

Height (max) inches

(mm)

Width (max) inches

(mm)

Depth (max) inches*

(mm)

Weight (typical) ounces

(kg)

* Excludes I/O connector pins, which may extend up to 0.010 inches be-

yond the edge of the head/disc assembly.

0.754 (19.15)

2.760 (70.10)

4.010 (101.85)

7.4 (0.21)

1.7 Seek time

All seek times are measured using a 25 MHz 486 AT computer (or faster) with a 8.3 MHz I/O bus. The measurements are taken with nominal power at sea level and 25°C ambient temperature. The specifications in the following table are defined as follows:

ST9655 Family Product Manual, Rev. A 3

• Track-to-track seek time is an average of all possible single-track seeks in both directions.

• Average seek time is a true statistical random average of at least 5,000 measurements of seeks between random tracks, less overhead.

• Full-stroke seek time is one-half the time needed to seek from the first data cylinder to the maximum data cylinder and back to the first data cylinder. The full-stroke average is determined by measuring 100 full-stroke seeks in both directions.

Typical read

Seek type

Track-to-track 6 7 Average 16 20 Full-stroke 26 28 Average latency (msec): 7.54 msec

(msec)

Typical write (msec)

1.8 Start times

Power-on to Ready (sec)

Standby to Ready (sec) 3 typical

7 typical (responds to selection and status commands within 2 seconds of powerup)

1.9 Reliability

Nonrecoverable read errors 1 per 1013 bits read

(with retries enabled)

Mean time between failures 300,000 power-on hours

(nominal power, at sea level, 25°C ambient temperature)

Contact start-stop cycles 50,000 cycles

(60 contact starts per hour max., with a 50% power-on duty cycle and nominal power, at sea level, at ambient

temperature and relative humidity) Preventive maintenance None required Mean time to repair 10 minutes

4 ST9655 Family Product Manual, Rev. A

Service life 5 years

1.10 Drive acoustics

Drive acoustics are measured as sound pressure 1 meter from the drive.

Mode Maximum

Idle (dBA) 30 Seek (dBA) 33

1.11 Environment

1.11.1 Ambient temperature

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

1.11.2 Temperature gradient

Operating 30°C/hr (54°F/hr) max, without condensation Nonoperating 30°C/hr (54°F/hr) max, without condensation

1.11.3 Relative humidity

Operating 8% to 80% noncondensing (10% per hour max)

Max. wet bulb temperature: 29.4°C (85°F)

Nonoperating 8% to 90% noncondensing (10% per hour max)

Max. wet bulb temperature: 40°C (104°F)

1.11.4 Altitude

Operating –1,000 ft to 10,000 ft (–300 m to 3,000 m) Nonoperating –1,000 ft to 40,000 ft (–300 m to 12,190 m)

+ 28 hidden pages