Seagate ST9120823AS, ST9200420AS, ST9160823AS, ST980813ASG, ST980813AS User Manual

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Seagate ST9120823AS, ST9200420AS, ST9160823AS, ST980813ASG, ST980813AS User Manual

Product Manual

Momentus 7200.2 SATA

ST9200420ASG

ST9120823AS

ST9200420AS

ST9100821AS

ST9160823ASG

ST980813ASG

ST9160823AS

ST980813AS

100451238 Rev. E December 2007

©2004-2007, Seagate Technology LLC All rights reserved. Publication number: 100451238, Rev. E

December 2007

Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Momentus, SeagateSeaBOARD, SeaFONE, SeaTDD, and SeaTools 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 and one terabyte, or TB, equals one trillion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. Quantitative usage examples for various applications are for illustrative purposes. Actual quantities will vary based on various factors, including file size, file format, features and application software. Seagate reserves the right to change, without notice, product offerings or specifications.

Contents

1.0

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

 

1.1

About the Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2

2.0

Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

2.1 Specification summary table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2.1 LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.4 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.5 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.6 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.7 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.8 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.9 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.9.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.9.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.9.3 Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.9.4 Power-management modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.10 Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.10.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.10.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.10.3 Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.10.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.10.5 Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.10.6 Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.11 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.12 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.13 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.13.1 Free Fall Protection feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.14 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.14.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.14.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.14.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.15 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.15.1 European Union Restriction of Hazardous Substances (RoHS) Directive . . . . . 16 2.15.2 China Restriction of Hazardous Substances (RoHS) Directive . . . . . . . . . . . . . 16

2.16 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.0

Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19

 

3.1

Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19

 

3.2

Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20

 

3.3

Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20

 

3.4

Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

4.0 Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.1 Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.2 Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.3.3 S.M.A.R.T. commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Momentus 7200.2 SATA Product Manual, Rev. E

i

ii

Momentus 7200.2 SATA Product Manual, Rev. E

List of Figures

Figure 1. Typical 5V startup and operating current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 2. Serial ATA connectors and jumper options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 3. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 4. Drive dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Momentus 7200.2 SATA Product Manual, Rev. E

iii

1.0Introduction

This manual describes the functional, mechanical and interface specifications for the following Seagate Momentus® 7200.2 SATA model drives:

ST9200420ASG

ST9200420AS

ST9160823ASG

ST9160823AS

ST9120823AS

ST9100821AS

ST980813ASG

ST980813AS

These drives provide the following key features:

7,200 RPM spindle speed

8 Mbyte buffer (80—160 GB models)

16 Mbyte buffer (200 GB models)

Free Fall Protection (on ST9200420ASG, ST9160823ASG and ST980813ASG models only)

High instantaneous (burst) data-transfer rates (up to 3.0 Gb/s)

Tunneling Magnetoresistive (TMR) recording heads

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

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

Quiet operation

800 Gs nonoperating shock

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

The 3D Defense System™, which includes Drive Defense, Data Defense and Diagnostic Defense, offers the industry’s most comprehensive protection for disc drives

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

Support for Read Multiple and Write Multiple commands

Momentus 7200.2 SATA Product Manual, Rev. E

1

1.1About the Serial ATA (SATA) 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 normally necessary to set any jumpers or other configuration options. A jumper position is available to configure the drive for 1.5Gb/s operation for systems that can not operate at a 3Gb/s transfer rate.

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 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 “Serial ATA: High Speed Serialized AT Attachment” specification. The specification can be downloaded from http://www.serialata.com.

2

Momentus 7200.2 SATA Product Manual, Rev. E

2.0Drive 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 ST9200420ASG, ST9200420AS, ST9160823AS, ST9160823ASG, ST9120823AS, ST9100821AS, ST980813AS and ST980813ASG models.

2.1Specification summary table

The specifications listed in this table are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual.

Table 1:

Drive specifications

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ST9200420ASG

ST9160823AS

 

 

ST980813AS

Drive specification

ST9200420AS

ST9160823ASG

ST9120823AS

ST9100821AS

ST980813ASG

 

 

 

 

 

 

Formatted Gbytes (512 bytes/sector)*

200

160

120

100

80

 

 

 

 

 

 

Guaranteed sectors

390,721,968

312,581,808

234,441,648

195,371,568

156,301,488

 

 

 

 

 

 

Bytes per sector

512

 

 

 

 

 

 

 

 

 

 

Default sectors per track

63

 

 

 

 

 

 

 

 

 

 

Default read/write heads

16

 

 

 

 

 

 

 

 

 

 

Default cylinders

16,383

 

 

 

 

 

 

 

 

 

 

Physical read/write heads

4

 

3

3

2

 

 

 

 

 

 

 

Discs

 

2

 

2

2

1

 

 

 

 

 

 

Recording density in BPI (bits/inch max)

1,014,000

853,000

 

 

 

 

 

 

 

 

 

Track density TPI (tracks/inch max)

162,600

155,000

 

 

 

 

 

 

 

 

 

Areal density (Gbits/inch2 max)

169.4

131

 

 

 

Spindle speed (RPM)

7,200

 

 

 

 

 

 

 

 

 

 

Internal transfer rate (Mbits/sec max)

850

711

 

 

 

 

 

 

 

 

 

Sustained transfer rate OD (Mbytes/sec)

69.5

59

 

 

 

 

 

 

 

 

 

I/O data transfer rate (Gb/s max)

3.0 (can also be configured for 1.5Gb/s operation)

 

 

 

 

 

 

 

 

ATA data-transfer modes supported

SATA-1

 

 

 

 

 

 

PIO modes 0–4

 

 

 

 

 

 

Multiword DMA modes 0–2

 

 

 

 

 

Ultra DMA modes 0–5

 

 

 

 

 

 

 

 

 

Cache buffer (Mbytes)

16

8

 

 

 

 

 

 

 

 

 

 

Height (max)

 

9.5 +/- 0.2 mm (0.374 +/- .0078 inches)

 

 

 

 

 

 

 

Width (max)

 

69.85 mm +/- 0.25 mm (2.75 +/- 0.00984 inches)

 

 

 

 

 

 

 

Length (max)

 

100.5 +/- 0.25 mm (3.957 +/- +/- 0.00984 inches)

 

 

 

 

 

 

 

 

Weight (max)

 

115 grams (0.254 lb)

 

 

 

 

 

 

 

 

 

Average latency (msec)

4.17 msec

 

 

 

 

 

 

 

 

 

 

Power-on to ready (typical)

4 seconds

 

 

 

 

 

 

 

 

 

 

 

Momentus 7200.2 SATA Product Manual, Rev. E

3

Table 1:

Drive specifications

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ST9200420ASG

ST9160823AS

 

 

ST980813AS

Drive specification

ST9200420AS

ST9160823ASG

ST9120823AS

ST9100821AS

ST980813ASG

 

 

 

 

 

 

Standby to ready (typical)

4 seconds

 

 

 

 

 

 

 

 

 

 

Startup current (typical) +5V (peak)

1.1 amps

 

 

 

 

 

 

 

Track-to-track seek time (msec typical)

1.0 (read), 1.5 (write)

 

 

 

 

 

 

 

Average seek, read (msec typical)

11.0

 

 

 

 

 

 

 

 

 

 

Average seek, write (msec typical)

13.0

 

 

 

 

 

 

 

 

 

 

Seek power (typical)

2.3 watts

 

 

 

 

 

 

 

 

 

 

Operating power (typical)

2.1 watts

 

 

 

 

 

 

 

 

 

 

Idle mode, low power (typical)

0.8 watts

 

 

 

 

 

 

 

 

 

 

Standby mode (average)

0.25 watts***

 

 

 

 

 

 

 

 

 

 

Sleep mode (average)

0.2 watts***

 

 

 

 

 

 

 

Voltage tolerance (including noise)

+5V ± 5% / -8% startup

 

 

 

 

Ambient temperature

0° to 60°C (operating)

 

 

 

–40° to 70°C (nonoperating)

 

 

 

 

 

 

 

Temperature gradient

20°C (operating)

 

 

 

 

(°C per hour max, non-condensing)

30°C (nonoperating)

 

 

 

 

Relative humidity

5% to 90% (operating)

 

 

 

5% to 95% (nonoperating)

 

 

 

 

Relative humidity gradient (non-condensing)

30% per hour max (operating and nonoperating)

 

 

 

 

 

 

 

Wet bulb temperature (max)

30°C (operating)

 

 

 

 

 

 

40°C (nonoperating)

 

 

 

 

Altitude, operating

–304.8 m to 3,048 m

 

 

 

(–1000 ft to 10,000+ ft)

 

 

 

 

Altitude, nonoperating

–304.8 m to 12,192 m

 

(meters below mean sea level, max)

(–1000 ft to 40,000+ ft)

 

Shock, operating (Gs max at 2 msec)

300

 

 

 

 

 

 

 

 

 

 

Shock, nonoperating (Gs max at 2 msec)

800

 

 

 

 

 

 

 

 

 

 

Shock, nonoperating (Gs max at 1 msec)

900

 

 

 

 

 

 

 

 

 

 

Shock, nonoperating (Gs max at 0.5 msec)

400

 

 

 

 

 

 

 

Vibration, operating

1.0 G (0 to peak, 5–500 Hz)

 

 

 

 

Vibration, nonoperating

5.0 G (0 to peak, 5–500 Hz)

 

 

 

 

 

 

 

Drive acoustics, sound power (bels)

 

 

 

 

 

Idle**

 

2.5 (typical)

 

 

 

 

 

 

2.8 (max)

 

 

 

 

Seek

 

2.9 (typical)

 

 

 

 

 

 

3.1 (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: http://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.

 

 

 

 

 

 

 

 

4

Momentus 7200.2 SATA Product Manual, Rev. E

Table 1:

Drive specifications

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ST9200420ASG

ST9160823AS

 

 

ST980813AS

Drive specification

ST9200420AS

ST9160823ASG

ST9120823AS

ST9100821AS

ST980813ASG

 

 

 

 

 

 

Load/Unload (L/UL) cycles

 

 

 

 

 

25°C, 50% relative humidity

600,000 software-controlled power on/off cycles

 

 

 

20,000 hard power on/off cycles

 

32°C, 80% relative humidity

600,000 software-controlled power on/off cycles

 

5°C, 80% relative humidity

20,000 hard power on/off cycles

 

5°C, 20% relative humidity

 

 

 

 

 

60°C, 20% relative humidity

 

 

 

 

 

 

 

 

 

 

 

Supports Hotplug operation per SATA II

Yes

 

 

 

 

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 activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

***Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby modes will not contribute to battery power consumption.

2.2Formatted capacity

Model

Formatted capacity*

Guaranteed sectors

Bytes per sector

 

 

 

 

ST9200420AS and ST9200420ASG

200 Gbytes

390,721,968

512

 

 

 

 

ST9160823AS and ST9160823ASG

160 Gbytes

312,581,808

512

 

 

 

 

ST9120823AS

120 Gbytes

234,441,648

512

 

 

 

 

ST9100821AS

100 Gbytes

195,371,568

512

 

 

 

 

ST980813AS and ST980813ASG

80 Gbytes

156,301,488

512

 

 

 

 

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

2.2.1LBA 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 48bit addressing support of drives with capacities over 137 Gbytes.

2.3Default logical geometry

Cylinders

Read/write heads

Sectors per track

 

 

 

16,383

16

63

 

 

 

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.

Momentus 7200.2 SATA Product Manual, Rev. E

5

2.4Physical organization

Drive model

Read/write heads

Number of discs

 

 

 

ST9200420AS and ST9200420ASG

4

 

 

 

ST9160823AS and ST9160823ASG

2

 

 

 

ST9120823AS

3

 

 

 

ST9100821AS

 

 

 

 

 

 

ST980813AS and ST980813ASG

2

1

 

 

 

2.5Recording and interface technology

 

200 GB models

160 - 80 GB models

 

 

 

Interface

Serial ATA (SATA)

 

 

 

 

Recording density BPI (bits/inch max)

1,014,000

853,000

 

 

 

Track density TPI (tracks/inch max)

162,600

155,000

 

 

 

Areal density (Gbits/inch2 max)

169.4

131

Spindle speed (RPM) (± 0.2%)

7,200

 

 

 

 

Maximum Internal transfer rate (Mbits/sec)

850

711

 

 

 

Sustained transfer rate OD (Mbytes/sec max)

69.5

59

 

 

 

I/O data-transfer rate (Mbytes/sec max)

300 (can also be configured for 150MB/s operation)

 

 

 

Interleave

1:1

 

 

 

 

Cache buffer

16 Mbytes (16,384 kbytes)

8 Mbytes (8,192 kbytes)

 

 

 

2.6Physical characteristics

Drive specification

 

 

 

 

 

 

Height

(mm)

9.5 +/-0.2

 

(inches)

0.374

+/-0.0078

 

 

 

 

Width

(mm)

69.85

+/-0.25

 

(inches)

2.75

+/-0.00984

 

 

 

Length

(mm)

100.5+/- 0.25

 

(inches)

3.957

+/- 0.00984

 

 

 

Maximum weight

(grams)

115 grams

 

(pounds)

(0.254 lb)

 

 

 

 

6

Momentus 7200.2 SATA Product Manual, Rev. E

2.7Seek 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.

Table 2:

Typical seek times

 

 

 

 

*Typical seek times (msec)

Read

Write

 

 

 

Track-to-track

1.0

1.5

 

 

 

 

Average

 

11.0

13.0

 

 

 

 

Full-stroke

 

22.0

24.0

 

 

 

Average latency

4.17

 

 

 

 

 

*Measured in performance mode

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.

2.8Start/stop times

Time to ready

Typical

Max

 

 

 

Power-on to Ready (sec)

4

8

 

 

 

Standby to Ready (sec)

4

8

 

 

 

Spin down

5

8

 

 

 

Momentus 7200.2 SATA Product Manual, Rev. E

7

2.9Power specifications

The drive receives DC power (+5V) through a native SATA power connector.

2.9.1Power consumption

Power requirements for the drives are listed in Table 3, on page 8. Typical power measurements are based on an average of drives tested, under nominal conditions, 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 is measured based on three random seek operations every 100 msecs. This mode is not typical.

Read/write power and current

Read/write power is measured with the heads on track, based on three 63 sector read or write operations every 100 msecs.

Idle mode power

Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in a random track location.

Standby mode

During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/ write electronics are in power-down model

Table 3:

DC power requirements

 

 

 

 

 

Power dissipation (watts)

+5V input average

 

Example: ST9160823AS

(watts, 25° C)

+5V typ amps

 

 

 

 

Spinup

 

1.1

 

 

 

 

Seek

 

2.3

 

 

 

 

 

Read

 

2.1

 

 

 

 

 

Write

 

2.1

 

 

 

 

Idle, performance mode*

1.9

 

 

 

 

 

Idle, active*

 

1.1

 

 

 

 

Idle, low power mode*

0.8

 

 

 

 

 

Standby

 

0.25

 

 

 

 

 

Sleep

 

0.2

 

 

 

 

 

*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.

8

Momentus 7200.2 SATA Product Manual, Rev. E

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