Seagate MOMENTUS ST960813AS, MOMENTUS ST9120822AS, MOMENTUS ST9160821AS, MOMENTUS ST9100828AS, MOMENTUS ST980811AS user manual

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Seagate MOMENTUS ST960813AS, MOMENTUS ST9120822AS, MOMENTUS ST9160821AS, MOMENTUS ST9100828AS, MOMENTUS ST980811AS user manual

Product Manual

Momentus® 5400.3 SATA

ST9160821AS

ST9120822AS

ST9100828AS

ST980811AS

ST960813AS

ST940814AS

100398882 Rev. D August 2007

©2004-2007, Seagate Technology LLC All rights reserved. Publication number: 100398882, 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. 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 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

Deferred spinup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

 

 

2.9.3

Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

 

 

2.9.4

Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

 

 

2.9.5

Power-management modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

 

2.10

Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

 

 

2.10.1

Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

 

 

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

 

2.14

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) . . . . . . . . . . . .

16

 

2.16

Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16

3.0

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

17

 

3.1

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

17

 

3.2

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

18

 

3.3

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

18

 

3.4

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

19

4.0 Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1 Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.2 Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.3.3 S.M.A.R.T. commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Momentus 5400.3 SATA Product Manual, Rev. D

i

ii

Momentus 5400.3 SATA Product Manual, Rev. D

List of Figures

Figure 1. Typical +5V only startup and operation current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 2. Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 3. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 4. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Momentus 5400.3 SATA Product Manual, Rev. D

iii

1.0Introduction

This manual describes the functional, mechanical and interface specifications for the following Seagate Momentus® 5400.3 SATA model drives:

ST9160821AS

ST9120822AS

ST9100828AS

ST980811AS

ST960813AS

ST940814AS

These drives provide the following key features:

5,400-RPM spindle speed.

8-Mbyte buffer.

Quiet operation. Fluid Dynamic Bearing (FDB) motor.

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.

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

900 Gs nonoperating shock and 350 Gs of operating 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 5400.3 SATA Product Manual, Rev. D

1

1.1About 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 normally 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 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.org.

2

Momentus 5400.3 SATA Product Manual, Rev. D

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 ST9160821AS, ST9120822AS, ST9100828AS, ST980811AS, ST960813AS, and ST940814AS 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

 

 

 

 

 

 

 

 

 

 

 

 

 

Drive specification

ST9160821AS

 

ST9120822AS

ST9100828AS

ST980811AS

ST960813AS

ST940814AS

 

 

 

 

 

 

 

 

Formatted Gbytes

160

 

120

100

80

60

40

(512 bytes/sector)*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Guaranteed sectors

312,581,808

 

234,441,648

195,371,568

156,301,488

117,210,240

78,340,160

 

 

 

 

 

 

 

 

Bytes per sector

512

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Physical read/write heads

4

 

3

3

2

2

1

 

 

 

 

 

 

 

 

 

Discs

 

2

 

2

2

1

1

1

 

 

 

 

 

 

 

 

Cache (Mbytes)

8

 

 

 

 

 

 

 

 

 

 

 

 

 

Recording density in BPI

870k

 

 

 

 

 

(bits/inch max)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Track density TPI (tracks/inch max)

150k

 

 

 

 

 

 

 

 

 

 

 

 

 

Areal density (Gbits/inch2 max)

132

 

 

 

 

 

 

Spindle speed (RPM)

5,400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Internal transfer rate

352

 

 

 

 

 

 

(Mbits/sec max)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I/O data transfer rate

150

 

 

 

 

 

 

(Mbytes/sec max)

 

 

 

 

 

 

 

 

 

 

 

 

ATA data-transfer modes supported

SATA 1.0, Serial ATA Revision 2.5

 

 

 

 

 

PIO modes 0–4

 

 

 

 

 

 

 

Multiword DMA modes 0–2

 

 

 

 

 

 

Ultra DMA modes 0–6

 

 

 

 

 

 

 

 

 

 

Height (max)

 

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

 

 

 

 

 

 

 

 

 

Width (max)

 

69.85 mm (2.75 +/- 0.0098 inches)

 

 

 

 

 

 

 

 

 

Length (max)

 

100.50 +/- 0.25 mm (3.957 +/- 0.010 inches)

 

 

 

 

 

 

 

 

 

Weight (typical)

100 grams (0.22 lb)

 

96 grams (0.21 lb)

 

 

 

 

 

 

 

 

 

Average latency (msec)

5.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power-on to ready (sec typical)

3.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standby to ready (sec typical)

3.0

 

 

 

 

 

 

 

 

 

 

 

 

Track-to-track seek time

1.0 (read), 1.5 (write)

 

 

 

 

(msec typical)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Momentus 5400.3 SATA Product Manual, Rev. D

3

Table 1:

Drive specifications

 

 

 

 

 

 

 

Drive specification

ST9160821AS

ST9120822AS

ST9100828AS

ST980811AS

ST960813AS

ST940814AS

 

 

 

 

 

 

 

Average seek, read (msec typical)

11.0

 

 

 

 

 

 

 

 

 

 

 

 

Average seek, write (msec typical)

13.0

 

 

 

 

 

 

 

Full-stroke seek (msec)

22 (typical); 24 (max)

 

 

Startup current, +5V (typical)

1.0 amps

 

 

Seek power (typical)

2.0 watts

 

 

Read/write power (typical)

Read: 1.9 watts; Write: 1.8 watts

 

 

Idle mode, low power (typical)

0.6 watts

 

 

 

Standby mode

 

0.2 watts (typical)***

 

 

 

Sleep mode

 

0.2 watts (typical)***

 

 

Voltage tolerance (including noise)

+5V ± 5%

 

 

Ambient temperature

0° to 60°C (operating), –40° to 70°C (nonoperating)

 

 

Temperature gradient

20°C (operating)

(°C per hour max)

30°C (nonoperating)

 

 

Relative humidity

5% to 90% (operating)

 

 

5% to 95% (nonoperating)

 

 

Relative humidity gradient

30% per hour max

 

 

Wet bulb temperature

30 (operating)

(°C max)

 

40 (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 (–1000 ft to 40,000+ ft)

(meters below mean sea level,

 

 

 

 

 

 

max)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shock, operating

350

 

 

 

 

 

(Gs max at 2 msec)

 

 

 

 

 

 

 

 

 

 

 

 

 

Shock, nonoperating

800

 

 

 

 

 

(Gs max at 2 msec)

 

 

 

 

 

 

 

 

 

 

 

 

 

Shock, nonoperating

900

 

 

 

 

 

(Gs max at 1 msec)

 

 

 

 

 

 

 

 

 

 

 

 

 

Shock, nonoperating

400

 

 

 

 

 

(Gs max at 0.5 msec)

 

 

 

 

 

 

 

 

Vibration, operating

1.0 G (0 to peak, 5–500 Hz)

 

 

Vibration, nonoperating

5 Gs (0 to peak, 5–500 Hz)

 

 

 

 

 

 

 

Drive acoustics, sound power

 

 

 

 

 

 

(bels)

 

 

 

 

 

 

 

Idle**

 

2.4 (typical)

 

 

2.6 (max)

 

 

Performance seek

3.0 (typical)

 

 

3.2 (max)

 

 

Nonrecoverable read errors

1 per 1014 bits read

Annualized Failure Rate (AFR)

<0.60%

 

 

 

 

 

 

 

 

 

 

 

 

Load/Unload (U/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, 10% relative humidity

 

 

 

 

 

 

55°C, 16% relative humidity

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

Momentus 5400.3 SATA Product Manual, Rev. D

Table 1:

Drive specifications

 

 

 

 

 

 

 

Drive specification

ST9160821AS

ST9120822AS

ST9100828AS

ST980811AS

ST960813AS

ST940814AS

 

 

 

 

 

 

 

 

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.

 

 

Supports Hotplug operation per

Yes (requires COMPRESET from host after a hotplug event)

Serial ATA Revision 2.5 specifica-

 

 

 

 

 

 

tion

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*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

 

 

 

 

ST9160821AS

160 Gbytes

312,581,808

512

 

 

 

 

ST9120822AS

120 Gbytes

234,441,648

512

 

 

 

 

ST9100828AS

100 Gbytes

195,371,568

512

 

 

 

 

ST980811AS

80 Gbytes

156,301,488

512

 

 

 

 

ST960813AS

60 Gbytes

117,210,240

512

 

 

 

 

ST940814AS

40 Gbytes

78,140,160

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 5400.3 SATA Product Manual, Rev. D

5

2.4Physical organization

Drive model

Read/write heads

Number of discs

 

 

 

ST9160821AS

4

2

 

 

 

ST9120822AS

3

2

 

 

 

ST9100828AS

3

2

 

 

 

ST980811AS

2

1

 

 

 

ST960813AS

2

1

 

 

 

ST940814AS

1

1

 

 

 

2.5Recording and interface technology

Interface

Serial ATA (SATA)

 

 

Recording method

Perpendicular

 

 

Recording density BPI (bits/inch max)

870k

 

 

Track density TPI (tracks/inch max)

150k

 

 

Areal density (Gbits/inch2 max)

132

Spindle speed (RPM) (± 0.2%)

5,400

 

 

Maximum Internal transfer rate (Mbits/sec)

352

 

 

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

150

 

 

Interleave

1:1

 

 

Cache buffer

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

+/-0.0098

 

 

 

Length

(mm)

100.50 +/-0.25

 

(inches)

3.957

+/-0.010

 

 

 

Typical weight

 

 

 

ST9160821AS

100 grams

 

ST9120822AS

0.22 pounds

 

ST9100828AS

 

 

 

ST980811AS

96 grams

 

ST960813AS

0.21 pounds

 

ST940814AS

 

 

 

 

 

 

6

Momentus 5400.3 SATA Product Manual, Rev. D

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

5.56

5.56

 

 

 

 

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 @ 25°C

 

 

 

Power-on to Ready (sec)

3.0

8.0

 

 

 

Standby to Ready (sec)

3.0

8.0

 

 

 

Momentus 5400.3 SATA Product Manual, Rev. D

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 the table 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

 

 

 

Power dissipation

+5V input average (25° C)

 

 

Spinup (typical)

1.0 amps

 

 

 

Seek

 

2.0 watts

 

 

 

Read

 

1.9 watts

 

 

 

Write

 

1.8 watts

 

 

Idle, performance*

1.4 watts

 

 

 

Idle, active*

 

0.75 watts

 

 

Idle, low power mode*

0.6 watts

 

 

 

Standby

 

0.2 watts

 

 

 

Sleep

 

0.2 watts

 

 

 

*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 5400.3 SATA Product Manual, Rev. D

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