seagate BARRACUDA ES + serial ata Product Manual

Barracuda ES Serial ATA

ST3750640NS ST3750840NS ST3500630NS ST3500830NS ST3400620NS ST3400820NS ST3320620NS ST3320820NS ST3250620NS ST3250820NS

Revision history

Revision Date Comments

Rev. A 06/21/06 Initial release. Rev. B 10/19/06 All.

Publication number: 100424667, Rev. B

October 2006

Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology LLC. SeaTools, SeaFONE, SeaBOARD, and SeaTDD are either registered trademarks or trademarks of Seagate Technology LLC. 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 of Seagate

Technology LLC.

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.2.1 LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.3 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.4 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.5 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.6 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.7 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.8 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.8.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.8.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.8.3 Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.8.4 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.9 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.9.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.9.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.9.3 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.9.4 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.9.5 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.9.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.10 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.11 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.12 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.12.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF) . . . 23

2.13 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.13.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.13.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.13.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.14 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.14.1 European Union Restriction of Hazardous Substances (RoHS) . . . . . . . . . . . . 25

2.15 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.1 Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.2 Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.3 Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.0 Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.1 Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.2 Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4.3.3 S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Barracuda ES Serial ATA Product Manual, Rev. B i

ii Barracuda ES Serial ATA Product Manual, Rev. B

List of Figures

Figure 1. Typical 5V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 2. Typical 12V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 3. Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 4. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 5. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Barracuda ES Serial ATA Product Manual, Rev. B iii

1.0 Introduction

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

Barracuda® ES Serial ATA model drives:

ST3750640NS ST3500630NS ST3400620NS ST3320620NS ST3250620NS

ST3750840NS ST3500830NS ST3400820NS ST3320820NS ST3250820NS

These drives provide the following key features:

• 7,200 RPM spindle speed.

• High instantaneous (burst) data-transfer rates (up to 300 Mbytes per second).

• Perpendicular recording technology provides the drives with increased areal density.

• 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.

Barracuda ES Serial ATA Product Manual, Rev. B 1

1.1 About the Serial ATA interface

The Serial ATA interface provides several advantages over the traditional (parallel) ATA interface. The prim ary advantages include:

• Easy installation and configuration with true plug-and-play connectivity. It is not necessary to set any jumpers 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 A TA 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 register s that shadow the content s of the traditional de vice registers, referred to as the Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For additional information about how Serial ATA emulates parallel ATA, refer to the “S erial ATA: High Speed Serialized AT Attachment” specification. The specification can be downloaded from www .serialata.org.

2 Barracuda ES Serial ATA Product Manual, Rev. B

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:

ST3750640NS ST3500630NS ST3400620NS ST3320620NS ST3250620NS ST3750840NS ST3500830NS ST3400820NS ST3320820NS ST3250820NS

2.1 Specification summary tables

The specifications listed in the following tables are for quick refere nce. For details on specification measurement or definition, see the appropriate section of this manual.

Barracuda ES Serial ATA Product Manual, Rev. B 3

Table 1: Drive specifications summary for 750 Gbyte models

Drive specification ST3750640NS ST3750840NS

Formatted Gbytes (512 bytes/sector)* 750 Guaranteed sectors 1,465,149,168 Heads 8 8 Discs 4 4 Bytes per sector 512 Default sectors per track 63 Default read/write heads 16 Default cylinders 16,383 Recording density, KBPI (kbits/in max) 926 Track density, KTPI (ktracks/in avg.) 145 Areal density, (Gbits/in2 avg) 128.2 Spindle speed (RPM) 7,200 Internal data transfer rate (Mbits/sec max) 1,030 Sustained data transfer rate OD (Mbytes/sec max) 78 I/O data-transfer rate (Mbytes/sec max) 300 ATA data-transfer modes supported PIO modes 0–4

Cache buffer 16 Mbytes 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) 720 grams Average latency 4.16 msec Power-on to ready (sec max) 15 sec Standby to ready (sec max) 15 sec Track-to-track seek time (msec typical) <0.8 read; <1.0 write Average seek, read (msec typical) <8.5 Average seek, write (msec typical) <10.0 Startup current (typical) 12V (peak) 2.8 amps Voltage tolerance (including noise) 5V ± 5%

Ambient temperature 5° to 55°C (operating)

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

Relative humidity 5% to 90% (operating)

Relative humidity gradient 30% per hour max Wet bulb temperature (°C max) 37.7 (operating)

Altitude, operating –60.96 m to 3,048 m

Altitude, nonoperating (below mean sea level, max)

Operational Shock (max at 2 msec) 63 Gs Non-Operational Shock (max at 2 msec) 300 Gs

Multiword DMA modes 0–2 Ultra DMA modes 0–6

12V ± 10%

–40° to 70°C (nonoperating)

30°C (nonoperating)

5% to 95% (nonoperating)

37.7 (nonoperating)

(–200 ft. to 10,000+ ft.) –60.96 m to 12,192 m

(–200 ft. to 40,000+ ft.)

4 Barracuda ES Serial ATA Product Manual, Rev. B

Drive specification ST3750640NS ST3750840NS

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

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

Drive acoustics, sound power (bels) Idle** 2.7 (typical)

Performance seek 3.2 (typical)

Nonrecoverable read errors 1 sector per 10 Annualized Failure Rate (AFR) 0.73% Warranty 5 years on distribution units.

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

Supports Hotplug operation per Serial ATA Revision 2.5 specification

22–350 Hz: 0.50 Gs 350–500 Hz: 0.25 Gs

22–350 Hz: 5.0 Gs 350–500 Hz: 1.0 Gs

3.0 (max)

3.9 (max)

bits read

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.

50,000

Yes

*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 a ctivity may occur according to the S.M.A.R.T. specification, which may incr ease acoustic and

power to operational levels.

Barracuda ES Serial ATA Product Manual, Rev. B 5

Table 2: Drive specifications summary for 500 Gbyte models

Drive specification ST3500630NS ST3500830NS

Formatted Gbytes (512 bytes/sector)* 500 Guaranteed sectors 976,773,168 Heads 6 Discs 3 Bytes per sector 512 Default sectors per track 63 Default read/write heads 16 Default cylinders 16,383 Recording density, KBPI (kbits/in max) 813 Track density, KTPI (ktracks/in avg.) 145 Areal density, (Gbits/in2 avg) 114.4 Spindle speed (RPM) 7,200 Internal data transfer rate (Mbits/sec max) 1,030 Sustained data transfer rate OD (Mbytes/sec max) 72 I/O data-transfer rate (Mbytes/sec max) 300 ATA data-transfer modes supported PIO modes 0–4

Cache buffer 16 Mbytes 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 (msec) 4.16 Power-on to ready (sec max) 15 sec Standby to ready (sec max) 15 sec Track-to-track seek time (msec typical) <0.8 (read), <1.0 (write) Average seek, read (msec typical) <8.5 Average seek, write (msec typical) <10.0 Startup current (typical) 12V (peak) 2.8 amps Voltage tolerance (including noise) 5V ± 5%

Ambient temperature 5° to 55°C (operating)

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

Relative humidity 5% to 90% (operating)

Relative humidity gradient 30% per hour max Wet bulb temperature (°C max) 37.7 (operating)

Altitude, operating –60.96 m to 3,048 m

Altitude, nonoperating (below mean sea level, max)

Operational Shock (max at 2 msec) 63 Gs Non-Operational Shock (max at 2 msec) 300 Gs

Multiword DMA modes 0–2 Ultra DMA modes 0–6

12V ± 10%

–40° to 70°C (nonoperating)

30°C (nonoperating)

5% to 95% (nonoperating)

37.7 (nonoperating)

(–200 ft. to 10,000+ ft.) –60.96 m to 12,192 m

(–200 ft. to 40,000+ ft.)

6 Barracuda ES Serial ATA Product Manual, Rev. B

Drive specification ST3500630NS ST3500830NS

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

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

Drive acoustics, sound power (bels) Idle** 2.5 (typical)

Performance seek 3.2 (typical)

Nonrecoverable read errors 1 sector per 10 Annualized Failure Rate (AFR) 0.73% Warranty 5 years on distribution units.

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

Supports Hotplug operation per SATA II specification

*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 a ctivity may occur according to the S.M.A.R.T. specification, which may incr ease acoustic and

power to operational levels.

22–350 Hz: 0.50 Gs 350–500 Hz: 0.25 Gs

22–350 Hz: 5.0 Gs 350–500 Hz: 1.0 Gs

2.8 (max)

3.5 (max)

bits read

To determine the warra nty 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.

50,000

Yes

Barracuda ES Serial ATA Product Manual, Rev. B 7

Table 3: Drive specifications summary for 400 Gbyte models

Drive specification ST3400620NS ST3400820NS

Formatted Gbytes (512 bytes/sector)* 400 Guaranteed sectors 781,422,768 Heads 5 Discs 3 Bytes per sector 512 Default sectors per track 63 Default read/write heads 16 Default cylinders 16,383 Recording density, KBPI (kbits/in max) 781 Track density, KTPI (ktracks/in avg.) 145 Areal density, (Gbits/in2 avg) 128.2 Spindle speed (RPM) 7,200 Internal data transfer rate (Mbits/sec max) 1,030 Sustained data transfer rate OD (Mbytes/sec max) 72 I/O data-transfer rate (Mbytes/sec max) 300 ATA data-transfer modes supported PIO modes 0–4

Ambient temperature 5° to 55°C (operating)

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

Relative humidity 5% to 90% (operating)

Relative humidity gradient 30% per hour max Wet bulb temperature (°C max) 37.7 (operating)

Altitude, operating –60.96 m to 3,048 m

Altitude, nonoperating (below mean sea level, max)

Operational Shock (max at 2 msec) 63 Gs Non-Operational Shock (max at 2 msec) 300 Gs

Multiword DMA modes 0–2 Ultra DMA modes 0–6

12V ± 10%

–40° to 70°C (nonoperating)

30°C (nonoperating)

5% to 95% (nonoperating)

37.7 (nonoperating)

(–200 ft. to 10,000+ ft.) –60.96 m to 12,192 m

(–200 ft. to 40,000+ ft.)

8 Barracuda ES Serial ATA Product Manual, Rev. B

Drive specification ST3400620NS ST3400820NS

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

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

Drive acoustics, sound power (bels) Idle** 2.5 (typical)

Performance seek 3.2 (typical)

Nonrecoverable read errors 1 sector per 10 Annualized Failure Rate (AFR) 0.73% Warranty 5 years on distribution units.

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

Supports Hotplug operation per SATA II specification

22–350 Hz: 0.50 Gs 350–500 Hz: 0.25 Gs

22–350 Hz: 5.0 Gs 350–500 Hz: 1.0 Gs

2.8 (max)

3.5 (max)

bits read

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. Y ou 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.

50,000

Yes

*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 a ctivity may occur according to the S.M.A.R.T. specification, which may incr ease acoustic and

power to operational levels.

Barracuda ES Serial ATA Product Manual, Rev. B 9

Table 4: Drive specifications summary for 320 Gbyte models

Drive specification ST3320620NS ST3320820NS

Formatted Gbytes (512 bytes/sector)* 320 Guaranteed sectors 625,142,448 Heads 4 Discs 2 Bytes per sector 512 Default sectors per track 63 Default read/write heads 16 Default cylinders 16,383 Recording density, KBPI (kbits/in max) 781 Track density, KTPI (ktracks/in avg.) 145 Areal density, (Gbits/in2 avg) 114.4 Spindle speed (RPM) 7,200 Internal data transfer rate (Mbits/sec max) 1,030 Sustained data transfer rate OD (Mbytes/sec max) 72 I/O data-transfer rate (Mbytes/sec max) 300 ATA data-transfer modes supported PIO modes 0–4

Ambient temperature 5° to 55°C (operating)

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

Relative humidity 5% to 90% (operating)

Relative humidity gradient 30% per hour max Wet bulb temperature (°C max) 37.7 (operating)

Altitude, operating –60.96 m to 3,048 m

Altitude, nonoperating (below mean sea level, max)

Operational Shock (max at 2 msec) 63 Gs Non-Operational Shock (max at 2 msec) 350 Gs

Multiword DMA modes 0–2 Ultra DMA modes 0–6

12V ± 10%

–40° to 70°C (nonoperating)

30°C (nonoperating)

5% to 95% (nonoperating)

37.7 (nonoperating)

(–200 ft. to 10,000+ ft.) –60.96 m to 12,192 m

(–200 ft. to 40,000+ ft.)

10 Barracuda ES Serial ATA Product Manual, Rev. B

Drive specification ST3320620NS ST3320820NS

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

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

Drive acoustics, sound power (bels) Idle** 2.5 (typical)

Performance seek 3.2 (typical)

Nonrecoverable read errors 1 sector per 10 Annualized Failure Rate (AFR) 0.73% Warranty 5 years on distribution units.

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

Supports Hotplug operation per SATA II specification

22–350 Hz: 0.50 Gs 350–500 Hz: 0.25 Gs

22–350 Hz: 5.0 Gs 350–500 Hz: 1.0 Gs

2.8 (max)

3.5 (max)

bits read

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. Y ou 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.

50,000

Yes

*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 a ctivity may occur according to the S.M.A.R.T. specification, which may incr ease acoustic and

power to operational levels.

Barracuda ES Serial ATA Product Manual, Rev. B 11

Table 5: Drive specifications summary for 250 Gbyte models

Drive specification ST3250620NS ST3250820NS

Formatted Gbytes (512 bytes/sector)* 250 Guaranteed sectors 488,397,168 Heads 3 Discs 2 Bytes per sector 512 Default sectors per track 63 Default read/write heads 16 Default cylinders 16,383 Recording density, KBPI (kbits/in max) 813 Track density, KTPI (ktracks/in avg.) 145 Areal density, (Gbits/in2 avg) 114.4 Spindle speed (RPM) 7,200 Internal data transfer rate (Mbits/sec max) 1,030 Sustained data transfer rate OD (Mbytes/sec max) 72 I/O data-transfer rate (Mbytes/sec max) 300 ATA data-transfer modes supported PIO modes 0–4

Cache buffer 16 Mbytes 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) 580 grams (1.28 lb.) Average latency (msec) 4.16 Power-on to ready (sec max) 11 sec Standby to ready (sec max) 15 sec Track-to-track seek time (msec typical) <0.8 (read), <1.0 (write) Average seek, read (msec typical) <8.5 Average seek, write (msec typical) <10.0 Startup current (typical) 12V (peak) 2.8 amps Voltage tolerance (including noise) 5V ± 5%

Ambient temperature 5° to 55°C (operating)

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

Relative humidity 5% to 90% (operating)

Relative humidity gradient 30% per hour max Wet bulb temperature (°C max) 37.7 (operating)

Altitude, operating –60.96 m to 3,048 m

Altitude, nonoperating (below mean sea level, max)

Operational Shock (max at 2 msec) 63 Gs Non-Operational Shock (max at 2 msec) 350 Gs

Multiword DMA modes 0–2 Ultra DMA modes 0–6

12V ± 10%

–40° to 70°C (nonoperating)

30°C (nonoperating)

5% to 95% (nonoperating)

37.7 (nonoperating)

(–200 ft. to 10,000+ ft.) –60.96 m to 12,192 m

(–200 ft. to 40,000+ ft.)

12 Barracuda ES Serial ATA Product Manual, Rev. B

+ 40 hidden pages