seagate ST3291A, ST3391A, ST3491A, ST3250A Product Manual

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ST3491 Family:

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ST3250A, ST3291A

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ST3391A, ST3491A

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AT Interface Drives

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Product Manual

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ST3491 Family:

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ST3250A, ST3291A

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ST3391A, ST3491A

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AT Interface Drives

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Product Manual

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Seagate

, Seagate Technology® and the Seagate logo are registered trademarks of Seagate Technology, Inc. SeaCache 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.

ST3491 Family AT Product Manual, Rev. B iii

Contents

1.0 Specification summary . . . . . . . . . . . . . . . . . . . . . . 1

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

1.1.1 Physical organization . . . . . . . . . . . . . . . . . . . 1

1.1.2 Recommended logical configuration . . . . . . . . . . . 2

1.2 Drive dimensions . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.1 Functional specifications . . . . . . . . . . . . . . . . . 3

1.3 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.5 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.6 Auto-park . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.7 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . 4

1.8 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.8.1 Ambient temperature . . . . . . . . . . . . . . . . . . . 5

1.8.2 Temperature gradient . . . . . . . . . . . . . . . . . . . 5

1.8.3 Relative humidity . . . . . . . . . . . . . . . . . . . . . 5

1.8.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.9 Power requirements . . . . . . . . . . . . . . . . . . . . . . 6

1.9.1 Input noise . . . . . . . . . . . . . . . . . . . . . . . . 6

1.9.2 Start and stop time . . . . . . . . . . . . . . . . . . . . 6

1.9.3 Idle and Standby timers . . . . . . . . . . . . . . . . . 7

1.9.4 Power-management modes . . . . . . . . . . . . . . . 7

1.9.5 Power consumption . . . . . . . . . . . . . . . . . . . 9

1.10 Agency listings . . . . . . . . . . . . . . . . . . . . . . . . 9

1.11 FCC verification . . . . . . . . . . . . . . . . . . . . . . 10

2.0 Hardware description . . . . . . . . . . . . . . . . . . . . . . 11

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

2.2 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . 12

2.3 Drive I/O connector . . . . . . . . . . . . . . . . . . . . . 15

3.0 Interface description . . . . . . . . . . . . . . . . . . . . . . 17

iv ST3491 Family AT Product Manual, Rev. B

3.1 AT interface connector pin assignments . . . . . . . . . . 17

3.2 Bus signal levels . . . . . . . . . . . . . . . . . . . . . . . 17

3.3 Configuration jumpers . . . . . . . . . . . . . . . . . . . . 19

3.3.1 Factory test configuration . . . . . . . . . . . . . . . . 20

3.3.2 Master/slave configuration . . . . . . . . . . . . . . . 20

3.3.3 No DASP– configuration . . . . . . . . . . . . . . . . 20

3.4 Cable select configuration . . . . . . . . . . . . . . . . . . 21

3.5 Drive activity LED . . . . . . . . . . . . . . . . . . . . . . 22

3.6 Supported AT commands . . . . . . . . . . . . . . . . . . 23

3.6.1 Identify Drive command (EC

3.6.2 Set Features command (EF

3.6.3 Set Multiple Mode command (C6

3.6.4 Read Multiple command (C4

3.6.5 Write Multiple command (C5

) . . . . . . . . . . . . . 25

) . . . . . . . . . . . . . 28

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

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

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

3.7 Onboard drive diagnostics . . . . . . . . . . . . . . . . . . 32

3.8 ECC performance tests . . . . . . . . . . . . . . . . . . . 32

3.9 Supported BIOS . . . . . . . . . . . . . . . . . . . . . . . 33

ST3491 Family AT Product Manual, Rev. B v

Figures

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

Figure 2. Standard mounting dimensions . . . . . . . . . . . . . . 13

Figure 3. Metric mounting dimensions . . . . . . . . . . . . . . . . 14

Figure 4. AT interface drive connector . . . . . . . . . . . . . . . . 15

Figure 5. AT connector pin assignments . . . . . . . . . . . . . . 18

Figure 6. Connectors and jumpers . . . . . . . . . . . . . . . . . 19

Figure 7. Connecting cable-selected drives . . . . . . . . . . . . . 21

ST3491 Family AT Product Manual, Rev. B 1

1.0 Specification summary

1.1 Formatted capacity

The drive is low-level formatted at the factory. You cannot low-level format the drive.

ST3250A ST3291A

Formatted capacity (Mbytes*) 213.9 272.7 Total sectors 417,792 532,700

ST3391A ST3491A

Formatted capacity (Mbytes*) 341.3 428.1 Total sectors 666,624 836,070

* One megabyte equals one million bytes.

1.1.1 Physical organization

ST3250A ST3291A

Heads 2 4 Discs 1 2

ST3391A ST3491A

Heads 4 4 Discs 2 2

2 ST3491 Family AT Product Manual, Rev. B

1.1.2 Recommended logical configuration

You can operate the drive using many different logical configurations, provided the number of sectors per track does not exceed 256. However, in DOS the number of sectors per track must be less than or equal to 63. When establishing the logical configuration, set the number of sectors per track and the number of heads to satisfy the following relationship:

≤ (sectors per track) x (heads) ≤ 4,096

When you configure the drive in CMOS, the total sectors cannot exceed the physical capacity of the drive. The total sectors is determined by the following formula:

total sectors = (logical heads) x (logical sectors per track) x (logical cylinders)

To maximize the capacity of the drive, the following geometry is recommended:

ST3250A ST3291A

Cylinders 1,024 761 Heads 12 14 Sectors per track 34 50

ST3391A ST3491A

Cylinders 768 899 Heads 14 15 Sectors per track 62 62

The drive is configured in translation mode. You can verify the number of cylinders, sectors per track and heads by using the Identify Drive (EC command. See the tion number 36111-

Seagate ATA Interface Reference Manual

xxx

, for details about the Identify Drive command.

, publica-

1.2 Drive dimensions

Height (max) 1.00 inch (25.4 mm) Width (max) 4.02 inches (102.1 mm) Depth (max) 5.77 inches (146.6 mm) Weight (max) 1.3 lb (0.59 Kg)

)

ST3491 Family AT Product Manual, Rev. B 3

1.2.1 Functional specifications

Interface AT Internal data transfer rate (Mbits/sec) 18.7 to 32* External data transfer rate (Mbytes/sec) 11.1** Spindle speed ± 0.5% (RPM) 3,811 SeaCache buffer (Kbytes) 120 Zone Bit Recording method RLL (1,7) Bytes per sector Recording density, max (BPI) 55,200 Flux density, max (FCI) 41,400 Track density, max (TPI) 3,081

* The internal data transfer rate for the ST3491A is 18.7 to 32. ** This is the external data transfer rate during a cache transfer. When

the drive is not using the cache, the transfer rate is 5.0 Mbytes per second.

512

1.3 Reliability

The MTBF specification assumes nominal power at sea level with an ambient temperature of 25°C.

Nonrecoverable errors 1 per 10 MTBF 300,000 power on hours Contact start-stop (CSS) 40,000 cycles MTTR 30 minutes Service life 5 years

bits read

1.4 Acoustics

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

Sound pressure, typ 29 dBA Sound pressure, max 33 dBA

4 ST3491 Family AT Product Manual, Rev. B

1.5 Seek time

All performance measurements are taken 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 table below are defined as follows:

• 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.

Track-to-track

Model

ST3250A 5 15 34 7.87 ST3291A 5 13 32 7.87 ST3391A 5 14 33 7.87 ST3491A 5 15 34 7.87

typ (msec)

Average

typ (msec)

Full-stroke typ (msec)

Latency

(msec)

1.6 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.

1.7 Shock and vibration

Shock measurements are based on an 11 msec, half sine wave shock pulse, not to be repeated more than twice per second. The specifications in the table below are defined as follows:

• During normal operating shock and vibration, the drive sustains no

physical damage and reads and writes data without errors.

ST3491 Family AT Product Manual, Rev. B 5

• During abnormal operating shock and vibration, the drive sustains no physical damage, but performance is adversely affected.

• During nonoperating shock and vibration, the read/write heads are in the shipping zone and the drive sustains no physical damage.

Normal operating

Shock 2 Gs 10 Gs 75 Gs 5–22 Hz vibration 22–500 Hz vibration 0.50 Gs 0.75 Gs 4.00 Gs

0.020-inch displacement

Abnormal operating Nonoperating

0.030-inch displacement

0.160-inch displacement

1.8 Environment

The acceptable environmental conditions for the drive are specified below. The specifications in this section are defined as follows:

• Operating specifications assume that the drive is powered up.

• Nonoperating specifications assume that the drive is packaged as it

was shipped from the factory.

1.8.1 Ambient temperature

Operating 5° to 55°C (41° to 131°F) Nonoperating –40° to 60°C (–40° to 140°F)

1.8.2 Temperature gradient

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

1.8.3 Relative humidity

Operating 8% to 80% noncondensing

Maximum wet bulb 29.4°C (85.0°F)

Nonoperating 5% to 95% noncondensing

Maximum wet bulb 40.0°C (104°F)

6 ST3491 Family AT Product Manual, Rev. B

1.8.4 Altitude

Operating –1,000 ft to 10,000 ft (–305 m to 3,050 m) Nonoperating –1,000 ft to 40,000 ft (–305 m to 12,200 m)

1.9 Power requirements

Except during a write operation, you can apply power to the drive or remove power from the drive in any sequence without losing data or damaging the drive.

1.9.1 Input noise

The drive is expected to operate with a maximum of 150 mV peak-to-peak triangular wave injected noise at the power connector. The frequency is 10 Hz to 20 MHz with equivalent resistive loads.

+5V +12V

Voltage tolerance including noise

± 5% ± 5%

± 10% during spinup

1.9.2 Start and stop time

After 10 seconds, the drive is ready. Typical and maximum start and stop times are shown in the following table. See Figure 1 on page 8 for the typical startup current profile.

Typical Maximum

Start time 7 sec 10 sec Stop time 6 sec 9 sec

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