Seagate ST3400820SCE User manual

Product Manual

DB35.3 Series Serial ATA

100427570

Rev. D

August 2007

ST3750640SCE

ST3750840SCE

ST3500830SCE

ST3400820SCE

ST3320820SCE

ST3300820SCE

ST3250820SCE

Revision history

Publication number: 100427570, Rev. D August 2007

Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC

in the United States and/or other countries. DB35.3 Series, SeaTools and SeaTDD are either trademarks

or registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States

and/or other countries. All other trademarks or registered trademarks are the property of their respective

owners.

One gigabyte, or GB, equals one billion bytes when referring to hard drive capacity. Accessible capacity

may vary depending on operating environment and formatting. Seagate reserves the right to change, with-

out notice, product offerings or specifications.

Revision Date Sheets affected or comments

Rev. A 08/04/06 Initial draft.

Rev. B 08/17/06 4-11 and 21.

Rev. C 07/18/07 ft cover, 1, 3, 4, 6, 8, 10 and 23.

Rev. D 08/2307 1, 39 and 40.

DB35.3 Series Serial ATA Product Manual, Rev. D

i

Contents

1.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1 About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Specification summary tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2.1 LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.3 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.4 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.5 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.6 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.7 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.8 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.8.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.8.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.8.3 Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.8.4 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.9 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.9.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.9.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.9.3 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.9.4 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.9.5 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.9.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.10 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.11 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.12 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.13 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.13.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.13.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.13.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.14 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.14.1 European Union Restriction of Hazardous Substances (RoHS) Directive. . . . . 23

2.14.2 China Restriction of Hazardous Substances (RoHS) Directive . . . . . . . . . . . . . 23

2.15 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.1 Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.2 Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.3 Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.0 Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.1 Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.2 Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.3.3 S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

ii

DB35.3 Series Serial ATA Product Manual, Rev. D

iii

List of Figures

Figure 1. Typical 5V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 2. Typical 12V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 3. Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 4. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 5. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

DB35.3 Series Serial ATA Product Manual, Rev. D

1

1.0 Introduction

This manual describes the functional, mechanical and interface specifications for the following Seagate

DB35.3 Series Serial ATA model drives:

These drives provide the following key features:

• 7,200 RPM spindle speed.

• High instantaneous (burst) data-transfer rates (up to 150 Mbytes per second).

• Tunneling Magnetoresistive (TMR) recording heads.

• State-of-the-art cache and on-the-fly error-correction algorithms.

• Native Command Queueing with command ordering to increase performance in demanding applications.

• Full-track multiple-sector transfer capability without local processor intervention.

• Quiet operation.

• SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.

• Support for S.M.A.R.T. drive monitoring and reporting.

• Supports latching SATA cables and connectors.

ST3750640SCE ST3500830SCE ST3320820SCE ST3250820SCE

ST3750840SCE ST3400820SCE ST3300820SCE

2

DB35.3 Series Serial ATA Product Manual, Rev. D

1.1 About the Serial ATA interface

The Serial ATA interface provides several advantages over the traditional Parallel ATA interface. The primary

advantages include:

• Easy installation and configuration with true plug-and-play connectivity. It is not necessary to set any jump-

ers or other configuration options.

• Thinner and more flexible cabling for improved enclosure airflow and ease of installation.

• Scalability to higher performance levels.

In addition, Serial ATA makes the transition from Parallel ATA easy by providing legacy software support. Serial

ATA was designed to allow you to install a Serial ATA host adapter and Serial ATA disc drive in your current

system and expect all of your existing applications to work as normal.

The Serial ATA interface connects each disc drive in a point-to-point configuration with the Serial ATA host

adapter. There is no master/slave relationship with Serial ATA devices like there is with Parallel ATA. If two

drives are attached on one Serial ATA host adapter, the host operating system views the two devices as if they

were both “masters” on two separate ports. This essentially means both drives behave as if they are Device 0

(master) devices.

Note. The host adapter may, optionally, emulate a master/slave environment to host software where two

devices on separate Serial ATA ports are represented to host software as a Device 0 (master) and

Device 1 (slave) accessed at the same set of host bus addresses. A host adapter that emulates a

master/slave environment manages two sets of shadow registers. This is not a typical Serial ATA

environment.

The Serial ATA host adapter and drive share the function of emulating Parallel ATA device behavior to provide

backward compatibility with existing host systems and software. The Command and Control Block registers,

PIO and DMA data transfers, resets, and interrupts are all emulated.

The Serial ATA host adapter contains a set of registers that shadow the contents of the traditional device regis-

ters, referred to as the Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For addi-

tional information about how Serial ATA emulates parallel ATA, refer to the “Serial ATA: High Speed Serialized

AT Attachment” specification. The specification can be downloaded from www.serialata.org.

DB35.3 Series Serial ATA Product Manual, Rev. D

3

2.0 Drive specifications

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal

power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate the

following drive models:

2.1 Specification summary tables

The specifications listed in the following table are for quick reference. For details on specification measurement

or definition, see the appropriate section of this manual.

ST3750640SCE ST3500830SCE ST3320820SCE ST3250820SCE

ST3750840SCE ST3400820SCE ST3300820SCE

4

DB35.3 Series Serial ATA Product Manual, Rev. D

Table 1: Drive specifications summary for 750 Gbyte models

Drive specification ST3750640SCE ST3750840SCE

Formatted Gbytes (512 bytes/sector)* 750

Guaranteed sectors 1,465,149,168

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density, max 926 kbits/in

Track density, max 145 ktracks/in

Areal density, max 128.2 Gbits/in2

Spindle speed 7,200 RPM

Internal data transfer rate, max 1,030 Mbits/sec

Sustained data transfer rate, max 78 Mbytes/sec

I/O data-transfer rate, max 300 Mbytes/sec

ATA data-transfer modes supported PIO modes 0–4

Multiword DMA modes 0–2

Ultra DMA modes 0–6

Cache buffer 16 Mbytes 8 Mbytes

Height, max 26.1 mm (1.028 inches)

Width, max 101.6 mm (4.000 inches) +/- 0.010 inches

Length, max 146.99 mm (5.787 inches)

Weight, typical 720 grams

Average latency 4.16 msec

Power-on to ready, max 16 sec

Standby to ready, max 16 sec

Track-to-track seek time, typical <0.8 msec read; <1.0 msec write

Average seek, read, typical <11.0 msec

Average seek, write, typical <12.0 msec

Startup current (max) 12V (peak) 2.0 amps

Voltage tolerance (including noise) 5V ± 5%

12V ± 10%

Ambient temperature 0° to 60°C (operating)

–40° to 70°C (nonoperating)

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

30°C (nonoperating)

Relative humidity 5% to 90% (operating)

5% to 95% (nonoperating)

Relative humidity gradient, per hour max 30%

Wet bulb temperature, max 37.7°C (operating)

37.7°C (nonoperating)

Altitude, operating –60.96 m to 3,048 m

(–200 ft. to 10,000+ ft.)

Altitude, nonoperating , max –60.96 m to 12,192 m below mean sea level

(–200 ft. to 40,000+ ft. below mean sea level)

Operational Shock, max 63 Gs at 2 msec

Non-Operational Shock, max 300 Gs at 2 msec

Vibration, operating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 0.50 Gs

350–500 Hz:: 0.25 Gs

DB35.3 Series Serial ATA Product Manual, Rev. D

5

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and

power to operational levels.

Vibration, nonoperating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 5.0 Gs

350–500 Hz:: 1.0 Gs

Drive acoustics, sound power

Idle** 2.8 bels (typical)

3.0 bels (max)

CE seek profile 3.0 bels (typical)

3.1 bels (max)

Nonrecoverable read errors 1 per 1014 bits read

Annualized Failure Rate (AFR) 0.68%

Warranty 5 years on distribution units.

To determine the warranty for a specific drive, use a web browser to

access the following web page:

www.seagate.com/support/service/

From this page, click on the “Verify Your Warranty” link. You will be asked

to provide the drive serial number, model number (or part number) and

country of purchase. The system will display the warranty information for

your drive.

Contact start-stop cycles (25°C, 50% rel. humidity) 50,000

Supports Hotplug operation per Serial ATA Revision 2.5

specification Yes

Drive specification ST3750640SCE ST3750840SCE

6

DB35.3 Series Serial ATA Product Manual, Rev. D

Table 2: Drive specifications summary for 500 and 400 Gbyte models

Drive specification ST3500830SCE ST3400820SCE

Formatted Gbytes (512 bytes/sector)* 500 400

Guaranteed sectors 976,773,168 781,422,768

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density, max 813 kbits/in 781 kbits/in

Track density, max 145 ktracks/in

Areal density, max 114.4 Gbits/in2128.2 Gbits/in2

Spindle speed 7,200 RPM

Internal data transfer rate, max 1,030 Mbits/sec

Sustained data transfer rate, max 72 Mbytes/sec

I/O data-transfer rate, max 300 Mbytes/sec

ATA data-transfer modes supported PIO modes 0–4

Multiword DMA modes 0–2

Ultra DMA modes 0–6

Cache buffer 8 Mbytes

Height, max 26.1 mm (1.028 inches)

Width, max 101.6 mm (4.000 inches) +/- 0.010 inches

Length, max 146.99 mm (5.787 inches)

Weight, typical 635 grams

Average latency 4.16 msec

Power-on to ready, max 16 sec

Standby to ready, max 16 sec

Track-to-track seek time, typical <0.8 msec read, <1.0 msec write

Average seek, read, typical <11.0 msec

Average seek, write, typical <12.0 msec

Startup current (max) 12V (peak) 2.0 amps

Voltage tolerance (including noise) 5V ± 5%

12V ± 10%

Ambient temperature 0° to 62°C (operating)

–40° to 70°C (nonoperating)

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

30°C (nonoperating)

Relative humidity 5% to 90% (operating)

5% to 95% (nonoperating)

Relative humidity gradient, per hour max 30%

Wet bulb temperature, max 37.7°C (operating)

37.7°C (nonoperating)

Altitude, operating –60.96 m to 3,048 m

(–200 ft. to 10,000+ ft.)

Altitude, nonoperating, max –60.96 m to 12,192 m below mean sea level

(–200 ft. to 40,000+ ft. below mean sea level)

Operational Shock, max 63 Gs at 2 msec

Non-Operational Shock, max 300 Gs at 2 msec

Vibration, operating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 0.50 Gs

350–500 Hz:: 0.25 Gs

DB35.3 Series Serial ATA Product Manual, Rev. D

7

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and

power to operational levels.

Vibration, nonoperating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 5.0 Gs

350–500 Hz:: 1.0 Gs

Drive acoustics, sound power

Idle** 2.8 bels (typical)

3.0 bels (max) 2.7 bels (typical)

2.9 bels (max)

CE seek profile 3.0 bels (typical)

3.1 bels (max) 2.9 bels (typical)

3.0 bels (max)

Nonrecoverable read errors 1 per 1014 bits read

Annualized Failure Rate (AFR) 0.68%

Warranty 5 years on distribution units.

To determine the warranty for a specific drive, use a web browser to access

the following web page:

www.seagate.com/support/service/

From this page, click on the “Verify Your Warranty” link. You will be asked to

provide the drive serial number, model number (or part number) and country

of purchase. The system will display the warranty information for your drive.

Contact start-stop cycles (25°C, 50% rel. humidity) 50,000

Supports Hotplug operation per Serial ATA Revision

2.5 specification Yes

Drive specification ST3500830SCE ST3400820SCE

8

DB35.3 Series Serial ATA Product Manual, Rev. D

Table 3: Drive specifications summary for 320 and 300 Gbyte models

Drive specification ST3320820SCE ST3300820SCE

Formatted Gbytes (512 bytes/sector)* 320 300

Guaranteed sectors 625,142,448 586,072,368

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density, max 781 kbits/in

Track density, max 145 ktracks/in

Areal density, max 114.4 Gbits/in2

Spindle speed 7,200 RPM

Internal data transfer rate, max 1,030 Mbits/sec

Sustained data transfer rate, max 72 Mbytes/sec

I/O data-transfer rate, max 300 Mbytes/sec

ATA data-transfer modes supported PIO modes 0–4

Multiword DMA modes 0–2

Ultra DMA modes 0–6

Cache buffer 8 Mbytes

Height (mm max) 26.1 mm (1.028 inches)

Width (mm max) 101.6 mm (4.000 inches) +/- 0.010 inches

Length (mm max) 146.99 mm (5.787 inches)

Weight (max) 635 grams

Average latency 4.16 msec

Power-on to ready, max 16 sec

Standby to ready, max 16 sec

Track-to-track seek time, typical <0.8 msec read; <1.0 msec write

Average seek, read, typical <11.0 msec

Average seek, write, typical <12.0 msec

Startup current (max) 12V (peak) 2.0 amps

Voltage tolerance (including noise) 5V ± 5%

12V ± 10%

Ambient temperature 0° to 65°C (operating)

–40° to 70°C (nonoperating)

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

30°C (nonoperating)

Relative humidity 5% to 90% (operating)

5% to 95% (nonoperating)

Relative humidity gradient, per hour max 30%

Wet bulb temperature, max 37.7°C (operating)

37.7°C (nonoperating)

Altitude, operating –60.96 m to 3,048 m

(–200 ft. to 10,000+ ft.)

Altitude, nonoperating, max –60.96 m to 12,192 m below mean sea level

(–200 ft. to 40,000+ ft. below mean sea level)

Operational Shock, max 63 Gs at 2 msec

Non-Operational Shock, max 300 Gs at 2 msec

Vibration, operating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 0.50 Gs

350–500 Hz:: 0.25 Gs

DB35.3 Series Serial ATA Product Manual, Rev. D

9

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and

power to operational levels.

Vibration, nonoperating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 5.0 Gs

350–500 Hz:: 1.0 Gs

Drive acoustics, sound power

Idle** 2.7 bels (typical)

2.9 bels (max) 2.5 bels (typical)

2.7 bels (max)

CE seek profile 2.9 bels (typical)

3.0 bels (max) 2.8 bels (typical)

2.9 bels (max)

Nonrecoverable read errors 1 per 1014 bits read

Annualized Failure Rate (AFR) 0.68%

Warranty 5 years on distribution units.

To determine the warranty for a specific drive, use a web browser to

access the following web page:

www.seagate.com/support/service/

From this page, click on the “Verify Your Warranty” link. You will be asked

to provide the drive serial number, model number (or part number) and

country of purchase. The system will display the warranty information for

your drive.

Contact start-stop cycles (25°C, 50% rel. humidity) 50,000

Supports Hotplug operation per Serial ATA Revision 2.5

specification Yes

Drive specification ST3320820SCE ST3300820SCE

10

DB35.3 Series Serial ATA Product Manual, Rev. D

Table 4: Drive specifications summary for 250 Gbyte models

Drive specification ST3250820SCE

Formatted Gbytes (512 bytes/sector)* 250

Guaranteed sectors 488,397,168

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density, max 813 kbits/in

Track density, max 145 ktracks/in

Areal density, max 114.4 Gbits/in2

Spindle speed 7,200 RPM

Internal data transfer rate, max 1,030 Mbits/sec

Sustained data transfer rate, max 72 Mbytes/sec

I/O data-transfer rate, max 300 Mbytes/sec

ATA data-transfer modes supported PIO modes 0–4

Multiword DMA modes 0–2

Ultra DMA modes 0–6

Cache buffer 8 Mbytes

Height, max 26.1 mm (1.028 inches)

Width, max 101.6 mm (4.000 inches) +/- 0.010 inches

Length, max 146.99 mm (5.787 inches)

Weight, typical 580 grams (1.28 lb.)

Average latency 4.16 msec

Power-on to ready, max 16 sec

Standby to ready, max 16 sec

Track-to-track seek time, typical <0.8 msec read; <1.0 msec write

Average seek, read, typical <11.0 msec

Average seek, write, typical <12.0 msec

Startup current (max) 12V (peak) 2.0 amps

Voltage tolerance (including noise) 5V ± 5%

12V ± 10%

Ambient temperature 0° to 65°C (operating)

–40° to 70°C (nonoperating)

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

30°C (nonoperating)

Relative humidity 5% to 90% (operating)

5% to 95% (nonoperating)

Relative humidity gradient, per hour max 30%

Wet bulb temperature, max 37.7°C (operating)

37.7°C (nonoperating)

Altitude, operating –60.96 m to 3,048 m

(–200 ft. to 10,000+ ft.)

Altitude, nonoperating, max –60.96 m to 12,192 m below mean sea level

(–200 ft. to 40,000+ ft. below mean sea level)

Operational Shock, max 63 Gs at 2 msec

Non-Operational Shock, max 350 Gs at 2 msec

Vibration, operating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 0.50 Gs

350–500 Hz:: 0.25 Gs

DB35.3 Series Serial ATA Product Manual, Rev. D

11

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and

power to operational levels.

Vibration, nonoperating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 5.0 Gs

350–500 Hz:: 1.0 Gs

Drive acoustics, sound power

Idle** 2.5 bels (typical)

2.7 bels (max)

CE seek profile 2.8 bels (typical)

2.9 bels (max)

Nonrecoverable read errors 1 per 1014 bits read

Annualized Failure Rate (AFR) 0.68%

Warranty 5 years on distribution units.

To determine the warranty for a specific drive, use a web browser to

access the following web page:

www.seagate.com/support/service/

From this page, click on the “Verify Your Warranty” link. You will be

asked to provide the drive serial number, model number (or part num-

ber) and country of purchase. The system will display the warranty

information for your drive.

Contact start-stop cycles

(25°C, 50% rel. humidity) 50,000

Supports Hotplug operation per Serial ATA Revision 2.5

specification Yes

Drive specification ST3250820SCE

12

DB35.3 Series Serial ATA Product Manual, Rev. D

2.2 Formatted capacity

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment

and formatting.

2.2.1 LBA mode

When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,

where n is the number of guaranteed sectors as defined above.

See Section 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-

bit addressing support of drives with capacities over 137 Gbytes.

2.3 Default logical geometry

LBA mode

When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,

where n is the number of guaranteed sectors as defined above.

Model Formatted

capacity* Guaranteed

sectors

Bytes per sector

ST3750640SCE 750 Gbytes 1,465,149,168 512

ST3750840SCE 750 Gbytes 1,465,149,168 512

ST3500830SCE 500 Gbytes 976,773,168 512

ST3400820SCE 400 Gbytes 781,422,768 512

ST3320820SCE 320 Gbytes 625,142,448 512

ST3300820SCE 300 Gbytes 586,072,368 512

ST3250820SCE 250 Gbytes 488,397,168 512

Cylinders Read/write heads Sectors per track

16,383 16 63

DB35.3 Series Serial ATA Product Manual, Rev. D

13

2.4 Recording and interface technology

2.5 Physical characteristics

750GB 500GB 400GB 320GB 300GB 250GB

Interface Serial ATA (SATA)

Recording method Perpendicular

Recording density, KBPI (kbits/inch max) 926 813 781 813

Track density, KTPI (ktracks/inch avg) 145

Areal density (Gbits/inch2 avg) 128.2 114.4

Spindle speed (RPM) (± 0.2%) 7,200

Internal data transfer rate (Mbits/sec max) 1,030

Sustained data transfer rate (Mbytes/sec max) 78 72

I/O data-transfer rate (Mbytes/sec max) 300 (Ultra DMA mode 5)

Drive specification

Maximum height(mm)

(inches) 26.1

1.028

Maximum width (mm)

(inches) 101.6

4.000 +/- 0.010

Maximum length(mm)

(inches) 146.99

5.787

Typical weight ST3320820SCE, ST3300820SCE and ST3250820SCE

ST3500830SCE and ST3400820SCE

ST3750640SCE and ST3750840SCE

580 grams (1.28 lbs)

635 grams (1.40 lbs)

720 grams (1.59 lbs)

Cache Size ST3750640SCE

ST3750840SCE

ST3500830SCE

ST3400820SCE

ST3320820SCE

ST3300820SCE

ST3250820SCE

16 Mbytes

8 Mbytes

14

DB35.3 Series Serial ATA Product Manual, Rev. D

2.6 Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using

drive diagnostics. 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.

Note. These drives are designed to consistently meet the seek times represented in this manual. Physical

seeks, regardless of mode (such as track-to-track and average), are expected to meet the noted

values. However, due to the manner in which these drives are formatted, benchmark tests that

include command overhead or measure logical seeks may produce results that vary from these

specifications.

2.7 Start/stop times

2.8 Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 4 on page 26.

2.8.1 Power consumption

Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on

an average of drives tested, under nominal conditions, using 5.0V and 12.0V input voltage at 25°C ambient

temperature.

• Spinup power

Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating

speed.

• Seek mode

During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and

does not execute a read or write operation. Servo electronics are active. Seek mode power represents the

worst-case power consumption, using only random seeks with read or write latency time. This mode is not

typical and is provided for worst-case information.

• Read/write power and current

Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-msec

delay, then a 16-sector read followed by a 32-msec delay.

Typical seek times (msec) Read Write

Track-to-track <0.8 <1.0

Average <11.0 <12.0

Average latency: 4.16 4.16

Power-on to Ready (sec) 16 (max)

Standby to Ready (sec) 16 (max)

Ready to spindle stop (sec) 10 (max)

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Seagate ST3400820SCE User manual

Seagate ST3400820SCE User manual

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