Seagate User manual

Product Manual

Constellation

®

Serial ATA

100538694

Rev. D

February 2011

ST9500530NS

ST9160511NS

Revision history

Publication number: 100538694, Rev. D. February 2011

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

LLC in the United States and/or other countries. Momentus 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.

No part of this publication may be reproduced in any form without written permission of Seagate

Technology LLC. Call 877-PUB-TEK1(877-782-8351) to request permission.

One gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion bytes. Your

computer's operating system may use a different standard of measurement and report a lower

capacity. In addition, some of the listed capacity is used for formatting and other functions, and thus

will not be available for data storage. Seagate reserves the right to change, without notice, product

offerings or specifications.

Revision Date Sheets affected or comments

Rev. A 02/24/09 Initial release.

Rev. B 04/20/09 5, 7-9, 12-13 and 15.

Rev. C 07-20-10 Trademark revision.

Rev. D 02-14-11 6, 9 & 23.

Constellation Serial ATA Product Manual, Rev. D i

Contents

1.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Specification summary tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.2 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2.1 LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.3 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.5 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.6 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.7 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.8 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.8.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.8.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.8.3 Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.8.4 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.9 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.9.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.9.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.9.3 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.9.4 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.9.5 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.9.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.10 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.11 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.12 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.12.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF) . . . 18

3.13 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.13.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.13.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.13.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.14 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.14.1 European Union Restriction of Hazardous Substances (RoHS) Directive. . . . . 20

3.14.2 China Restriction of Hazardous Substances (RoHS) Directive . . . . . . . . . . . . . 20

3.15 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1 Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.2 Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.3 Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.5 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.0 Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.1 Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.2 Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.3.3 S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

ii Constellation Serial ATA Product Manual, Rev. D

Constellation Serial ATA Product Manual, Rev. D iii

List of Figures

Figure 1. Typical 5V/12V startup and operation current profile for ST9500530NS . . . . . . . . . . . . . . . . 12

Figure 2. Typical 5V/12V startup and operation current profile for ST9160511NS . . . . . . . . . . . . . . . . 12

Figure 3. Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 4. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 5. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 6. Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Constellation Serial ATA Product Manual, Rev. D 1

1.0 Seagate Technology support services

SEAGATE ONLINE SUPPORT and SERVICES

For information regarding products and services, visit http://www.seagate.com/www/en-us/about/contact_us/

Available services include:

Presales & Technical support

Global Support Services telephone numbers & business hours

Authorized Service Centers

For information regarding Warranty Support, visit

http://www.sea

gate.com/www/en-us/support/warranty_&_returns_assistance

For information regarding Data Recovery Services, visit http://www.i365.com

For Seagate OEM & Distribution partner portal, visit https://direct.seagate.com/portal/system

For Seagate reseller portal, visit http://spp.seagate.com

2 Constellation Serial ATA Product Manual, Rev. D

Constellation Serial ATA Product Manual, Rev. D 3

2.0 Introduction

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

Constellation

®

Serial ATA model drives:

These drives provide the following key features:

• 7200 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.

• Worldwide Name (WWN) capability uniquely identifies the drive.

ST9500530NS ST9160511NS

4 Constellation Serial ATA Product Manual, Rev. D

2.1 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.

Constellation Serial ATA Product Manual, Rev. D 5

3.0 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:

Product data communicated in this manual is specific only to the model numbers listed in this manual. The data

listed in this manual may not be predictive of future generation specifications or requirements. If you are

designing a system which will use one of the models listed or future generation products and need further

assistance, please contact your Field Applications Engineer (FAE) or our global support services group as

shown in Section 1.0.

3.1 Specification summary tables

The specifications listed in the following tables are for quick reference. For details on specification measure-

ment or definition, see the appropriate section of this manual.

ST9500530NS ST9160511NS

6 Constellation Serial ATA Product Manual, Rev. D

Table 1: Drive specifications summary for 500 and 160 GB models

Drive specification ST9500530NS ST9160511NS

Formatted Gbytes (512 bytes/sector)* 500 160

Guaranteed sectors 976,773,168 312,581,808

Heads 6 2

Discs 3 1

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density, KBPI (kbits/in max) 1410

Track density, KTPI (ktracks/in avg.) 200

Areal density, (Gbits/in

2

avg) 283

Spindle speed (RPM) 7200

Internal data transfer rate (Mbits/sec max) 1136

Sustained data transfer rate OD (Mbytes/sec max) 95

I/O data-transfer rate (Mbytes/sec max) 300

ATA data-transfer modes supported PIO modes 0–4

Multiword DMA modes 0–2

Ultra DMA modes 0–6

Cache buffer 32 Mbytes

Weight: (maximum) 196 grams (0.43 lbs) 188 grams (0.41 lbs)

Average latency 4.16 msec

Power-on to ready (sec max) 20 sec

Standby to ready (sec max) 6 sec 4 sec

Track-to-track seek time (msec typical) 0.5 read

0.7 write

Average seek, read (msec typical) 8.0

Average seek, write (msec typical) 8.4

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

Voltage tolerance (including noise) 5V ± 5%

12V ± 5%

Ambient temperature 5° to 55°C (operating)

–40° to 70°C (nonoperating)

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

20°C (nonoperating)

Relative humidity 5% to 95% (operating)

5% to 95% (nonoperating)

Relative humidity gradient 20% per hour max

Wet bulb temperature (°C max) 37.7 (operating)

40.0 (nonoperating)

Altitude, operating –60.96 m to 3048 m

(–200 ft. to 10,000+ ft.)

Altitude, nonoperating

(below mean sea level, max)

–60.96 m to 12,192 m

(–200 ft. to 40,000+ ft.)

Operational Shock (max at 2 msec) 70 Gs

Non-Operational Shock (max at 2 msec) 400 Gs

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

22–350 Hz: 0.50 Gs

350–500 Hz: 0.25 Gs

Vibration, nonoperating 5–500 Hz: 3.0 Gs

Constellation 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.

Drive acoustics, sound power (bels)

Active 2.6 (typical) 2.5 (typical)

Idle** 2.3 (typical) 2.1 (typical)

Nonrecoverable read errors 1 sector per 10

15

bits read

Annualized Failure Rate (AFR) 0.73%

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

following web page

:http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance

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

vide the drive serial number, model number (or part number) and country of pur-

chase. The system will display the warranty information for your drive.

Motor start-stop cycles

(25°C, 50% rel. humidity)

50,000

Supports Hotplug operation per

Serial ATA Revision 2.5 specification

Yes

Drive specification ST9500530NS ST9160511NS

8 Constellation Serial ATA Product Manual, Rev. D

3.2 Formatted capacity

Model

Formatted

capacity*

Guaranteed

sectors

Bytes per sector

ST9500530NS 500 Gbytes 976,773,168

512

ST9160511NS 160 Gbytes 312,581,808

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

and formatting.

3.2.1 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 5.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-

bit addressing support of drives with capacities over 137 Gbytes.

3.3 Default 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.

3.4 Recording and interface technology

500GB 160GB

Interface Serial ATA (SATA)

Recording method Perpendicular

Recording density, KBPI (kbit

s/inch max) 1410

Track density, KTPI (ktracks/inch avg) 200

Areal density (Gbits/inch

2

avg) 283

Spindle speed (RPM) (± 0.2%) 7200

Internal data transfer rate (Mbits/sec max) 1136

Sustained data transfer rate (Mbytes/sec max) 95

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

Constellation Serial ATA Product Manual, Rev. D 9

3.5 Physical characteristics

Weight: (maximum)

ST9500530NS 196 grams (0.43 lbs)

ST9160511NS 188 grams (0.41 lbs)

Cache buffer 32 Mbytes (32,768 kbytes)

Note. Refer to Figure 5, page 23 for detailed mounting configuration dimensions.

3.6 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 avera

ge of at least 5,000 measurements of seeks between

random tracks, less overhead.

*Typical seek times (msec) Read Write

Track-to-track 0.5 0.7

Average 8.0 8.4

Full Stroke 17.4 17.9

Average latency: 4.16

*Measured in performance mode.

Note. Th

ese 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.

3.7 Start/stop times

ST9500530NS ST9160511NS

Power-on to Ready (sec) 20 (max)

Standby to Ready (sec) 6 (max) 4 (max)

Ready to spindle stop (sec) 20 (max)

10 Constellation Serial ATA Product Manual, Rev. D

3.8 Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 4, page 22 on

page 22.

3.8.1 Power consumption

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

a

n 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.

• Standby mode

During Standby mode, the drive accepts commands, but th

e drive is not spinning, and the servo and read/

write electronics are in power-down mode.

Table 2: DC power requirements

Parameter

Voltage +5 V +12 V Power +5 V +12 V Power

Regulation +/-5% +/-5% (watts) +/-5% +/-5

%

(watts)

Average Idle Current 0.28 0.11 2.69 0.29 0.11 2.71

Advanced Idle Current

Idle_A 0.24 0.10 2.42 0.24 0.10 2.45

Idle_B 0.14 0.08 1.71 0.15 0.08 1.72

Idle_C 0.14 0.05 1.37 0.15 0.05 1.38

Standby 0.16 0.02 1.05 0.17 0.02 1.06

Average Sleep Current 0.16 0.02 1.06 0.16 0.02 1.03

Maximum Start Current:

DC (Peak DC) 0.39 0.64 9.64 0.40 0.65 9.77

AC (Peak AC) 0.73 1.50 21.59 0.72 1.55 22.25

Delayed Motor Start (DC max) 0.16 0.03 1.12 0.17 0.02 1.08

Peak Operating Current (random read):

Typical DC 0.29 0.13 3.05 0.30 0.14 3.11

Maximum DC 0.29 0.15 3.22 0.30 0.15 3.30

Maximum DC (peak) 0.84 0.52 10.44 0.84 0.56 10.92

Peak Operating Current (random write):

Typical DC 0.34 0.14 3.42 0.35 0.14 3.49

Maximum DC 0.36 0.14 3.50 0.36 0.15 3.59

Maximum DC (peak) 1.02 0.58 12.06 1.02 0.60 12.30

Peak operating current (sequential read):

Typical DC 0.58 0.12 4.27 0.58 0.12 4.33

Maximum DC 0.59 0.12 4.35 0.60 0.12 4.44

Maximum DC (peak) 0.82 0.22 6.74 0.84 0.22 6.84

Peak operating current (sequential write):

Typical DC 0.63 0.12 4.52 0.64 0.12 4.59

Maximum DC 0.67 0.12 4.77 0.68 0.12 4.84

Maximum DC (peak) 1.04 0.20 7.60 1.06 0.20 7.70

ST9500530NS ST9500530NS

(1.5GB) (3.0GB)

*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.

Constellation Serial ATA Product Manual, Rev. D 11

*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.

Parameter

Voltage +5 V +12 V Power +5 V +12 V Power

Regulation +/-5% +/-5% (watts) +/-5% +/-5

%

(watts)

Average Idle Current 0.23 0.08 2.11 0.24 0.08 2.14

Advanced Idle Current

Idle_A 0.23 0.08 2.08 0.24 0.08 2.10

Idle_B 0.14 0.06 1.46 0.15 0.06 1.49

Idle_C 0.14 0.04 1.25 0.15 0.04 1.27

Standby 0.16 0.02 1.02 0.17 0.02 1.04

Average Sleep Current 0.16 0.02 0.97 0.16 0.02 1.00

Maximum Start Current:

DC (Peak DC) 0.41 0.62 9.47 0.41 0.62 9.51

AC (Peak AC) 0.57 0.77 12.11 0.57 1.09 15.94

Delayed Motor Start (DC max) 0.16 0.02 1.01 0.17 0.02 1.04

Peak Operating Current (random read):

Typical DC 0.31 0.11 2.88 0.31 0.11 2.92

Maximum DC 0.31 0.12 3.01 0.32 0.12 3.07

Maximum DC (peak) 0.82 0.5

2

10.34 0.84 0.52 10.44

Peak Operating Current (random write):

Typical DC 0.35 0.12 3.18 0.36 0.12 3.22

Maximum DC 0.35 0.12 3.23 0.36 0.12 3.28

Maximum DC (peak) 1.02 0.56 11.82 1.00 0.52 11.24

Peak operating current (sequential read):

Typical DC 0.58 0.09 3.98 0.59 0.09 4.00

Maximum DC 0.60 0.09 4.08 0.60 0.09 4.11

Maximum DC (peak) 0.84 0.20 6.60 0.86 0.20 6.70

Peak operating current (sequential write):

Typical DC 0.62 0.09 4.15 0.62 0.09 4.18

Maximum DC 0.67 0.09 4.46 0.68 0.09 4.49

Maximum DC (peak) 1.02 0.20 7.50 1.04 0.20 7.60

ST9160511NS ST9160511NS

(1.5GB) (3.0GB)

12 Constellation Serial ATA Product Manual, Rev. D

3.8.1.1 Typical current profiles

Figure 1. Typical 5V/12V startup and operation current profile for ST9500530NS

Figure 2. Typical 5V/12V startup and operation current profile for ST9160511NS

Constellation Serial ATA Product Manual, Rev. D 13

3.8.2 Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on

the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.

• Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave

injected noise at up to 10 MHz.

• Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave

injected noise at up to 10 MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write

current.

3.8.3 Voltage tolerance

Voltage tolerance (including noise):

5V ±5%

12V ±5%

14 Constellation Serial ATA Product Manual, Rev. D

3.8.4 Power-management modes

PowerChoice

TM

power management

Drives using the load/unload architecture provide programmable power management to tailor systems for per-

formance and greater energy efficiency.

The table below lists the supported PowerChoice modes. The further you go down in the table, the more power

savings you get. For example, Idle_B mode results in greater power savings than Idle_A mode. Standby mode

results in the greatest power savings.

PowerChoice can be invoked using one of these two methods:

• Extended Power Conditions (EPC) Set Features Command method-Enable and initialize the idle condition

timers.

• Standby Immediate and Idle Immediate command method-Use the EPC Set Features Command. This allows

the host to directly transition the drive to any supported PowerChoice mode. The drive preserves the existing

idle power settings.

PowerChoice reporting methods

PowerChoice

TM

provides these reporting methods for tracking purposes:

Check Power Mode Reports

• Current power condition

Power Condition Log Reports

• Idle condition enabled/disabled

• If timer is changeable

• Typical recovery time from extended power conditions

• Current timer setting and Manufacturer default timer settings

SMART Read Data Attribute - Load/ Unload Cycle Counter

Mode Description

Idle_A Reduced electronics

Idle_B Heads unloaded. Disks spinning at full RPM

Idle_C Heads unloaded. Disks spinning at reduced RPM

Standby Heads unloaded. Motor stopped (disks not spinning)

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