Seagate ST3120026AS, ST3160023AS, ST3160827AS, ST3160021AS, ST380013AS User Manual

...

Barracuda 7200.7 Serial ATA

ST3200822AS ST3160827AS ST3160023AS ST3160021AS ST3120827AS ST3120026AS ST3120022AS ST380817AS ST380013AS ST380011AS ST340111AS ST340014AS

Barracuda 7200.7 Serial ATA

ST3200822AS ST3160827AS ST3160023AS ST3160021AS ST3120827AS ST3120026AS ST3120022AS ST380817AS ST380013AS ST380011AS ST340111AS ST340014AS

Publication number: 100270024, Rev. N

September 2005

Seagate and Seagate Technology are registered tradem arks of Seagate Technology LLC. SeaTools, SeaFON E, Se aBOARD, SeaT DD, and the Wave logo are e ither r egister ed trade marks or trademarks of Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners.

Seagate reserves the right to ch ange, witho ut notice, product offerings or spec ifications . No

part of this publication may be reproduc ed in any form w ithout wr itte n per mi ssio n of Seagate

Technology LLC.

Contents

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

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

1.2 Native Command Queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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

2.5.1 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.6 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.7 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.8 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.8.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.8.2 Deferred spinup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.8.3 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.8.4 Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.8.5 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.9 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.9.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.9.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.9.3 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.9.4 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.9.5 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.9.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.10 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.11 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.12 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.13 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.13.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.13.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.13.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.14 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.15 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.3.3 S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Barracuda 7200.7 Serial ATA Product Manual, Rev. N iii

iv Barracuda 7200.7 Serial ATA Product Manual, Rev. N

List of Figures

Figure 1. Typical 5V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 2. Typical 12V startup and operation current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 3. Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 4. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 5. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Barracuda 7200.7 Serial ATA Product Manual, Rev. N v

1.0 Introduction

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

Barracuda

7200.7 Serial ATA model drives:

T able 1: Barracuda 7200.7 Serial ATA models

OEM models

ST3200822AS ST3160023AS ST3160021AS ST3120026AS ST3120022AS

[1]

ST380013AS ST380011AS

ST340111AS

ST340014AS

Distribution models

not supporting NCQ

[1]

ST3200822AS ST3160827AS ST3160023AS ST3120827AS ST3120026AS ST380817AS

ST380013AS

Distribution models

supporting NCQ

[1] OEM model that may support NCQ These drives provide the following key features:

• 7,200 RPM spindle speed

• 8 Mbyte buffer (ST3200822AS, ST3160827AS, ST3160023AS, ST3120827AS, ST3120026AS, ST380817AS, ST380013AS and ST340111AS models)

• 2 Mbyte buffer (ST3160021AS, ST3120022AS, ST380011AS, and ST340014AS models)

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

• Giant magnetoresistiv e (GMR) recording heads and EPRML technology, provide the drives with increase d areal density.

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

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

• Quiet operation.

• 350 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.

• Native Command Queing enabled on some models.

Barracuda 7200.7 Serial ATA Product Manual, Rev. N 1

1.1 About the Serial ATA interface

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

• Easy installation and c onfiguration with tru e plug-and- play conn ectivity. 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 ATA easy by providing legacy software support. Serial ATA was designed to allow you to install a Ser ial ATA host adapter and Serial ATA disc drive in your cu rrent system and expect all of your existing applications to work as normal.

The Serial ATA interface connects eac h disc drive in a point-to-point configu ration with the Serial ATA host adapter. There is no master/slave relationship with Seria l ATA device s 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 essenti ally mean s both dr ives behav e as if they are Dev ice 0 (master) devices.

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

devices on separate Serial ATA ports are represented to host so ftware as a Device 0 ( maste r) and Device 1 (slave) acce ssed at the s ame set of ho st bus addr esses. A h ost adapter tha t emulat es a master/slave environment manages two sets of shadow register s. This is not a typical Serial ATA environment.

The Serial ATA host adapter and drive shar e the funct ion of emul ating para llel ATA device behavior to provid e backward compatibility with existing host systems an d software. The Command and Contr ol 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 th e Shadow Register Block. A ll Se ri al ATA devices beh av e l ik e De vice 0 devices. For add itional information about how Ser ial 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.

1.2 Native Command Queuing

Native Command Queuing (NCQ) is am ong the ad vanc ed featur es in troduced in the Se rial ATA II: Extensions to Serial ATA 1.0 Specification. NCQ is a powerful technolo gy designed to increase pe rformance and endurance by allowing the drive to internally optimize the execution order of workloads. Intelligent reordering of commands within the drive’s internal command queue helps improve performance of queued workloads by minimizing mechanical positioning latencies on the drive.

Operating systems suc h as Microsoft Windows and Linux are inc reasingl y taking advantage of multi- threade d software or processor-based Hyper-Threading Technology. These features have a high potential to create workloads where multiple commands are outstanding to the drive at the same time. By utilizing NCQ, the potential disc performance is increased significantly for these workloads.

Native Command Queuing achieves high performance and efficiency through efficient command reordering. In addition, there are three new capabilities that are built into the Serial ATA protocol to enhance NCQ performance: racefree status return, interrupt aggregation, and First-Party DMA.

To learn more about NCQ, go to the Seagate Serial ATA resource site at: www.seagate.com/products/interface/sata/.

2 Barracuda 7200.7 Serial ATA Product Manual, Rev. N

2.0 Drive specifications

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. For convenience, the phrases t he drive and this drive are used throughout th is manual to indi cate the ST3200822AS, ST3160827AS, ST3160023AS, ST3160021AS, ST3120827AS, ST3120026AS, ST3120022AS, ST380817AS, ST380013AS, ST380011AS, ST3401 11AS and ST340014AS models.

2.1 Specification summary table

The specificatio ns lis ted in th is table ar e for quick reference. For de tails on specification me as ur eme nt o r de finition, see the appropriate section of this manual.

Table 2: Drive specifications

ST3160827AS

Drive specification ST3200822AS

Formatted Gbytes (512 bytes/sector)* 200 160 120 80 40 Guaranteed sectors 390,721,968 312,581,808 234,441,648 156,301,488 78,165,360 Bytes per sector 512 Default sectors per track 63 Default read/write heads 16 Default cylinders 16,383 Physical read/write heads 4 4 3 2 1 Discs 2 2 2 1 1 Recording density in BPI (bits/inch max) 671,500 595,000 Track density TPI (tracks/inch max) 98,000 94,600 Areal density (Gbits/inch Spindle speed (RPM) 7,200 Internal transfer rate (Mbytes/sec max) 85.4 Sustained transfer rate OD (Mbytes/sec) 58 I/O data transfer rate (Mbytes/sec max) 150

ATA data-transfer modes supported

Cache buffer

Height (max) 26.035 mm (1.028 inches) Width (max) 101.6 mm (4.000 inches) Length (max) 146.99 mm (5.787 inches) Weight (typical) 635 grams (1.4 lb)

max) 68.5 56.3

SATA 1.0, SATA II PIO modes 0–4 Multiword DMA modes 0–2 Ultra DMA modes 0–6

8 Mbytes: ST3200822AS, ST3160827AS, ST3160023AS, ST3120827A S, 2 Mbytes: ST3160021AS, ST3120022AS, ST380011AS, and ST340014AS

ST3120026AS, ST380817AS, ST380013AS and ST340111AS

ST3160023AS ST3160021AS

ST3120827AS ST3120026AS ST3120022AS

ST380817AS ST380013AS ST380011AS

ST340111AS ST340014AS

Barracuda 7200.7 Serial ATA Product Manual, Rev. N 3

Table 2: Drive specifications

Drive specification ST3200822AS

Average latency (msec) 4.16 Power-on to ready (typical) 10 sec Standby to ready (typical) 10 sec Startup current (typical) 12V (peak) 2.8 amps Track-to-track seek time (msec typical) <1.0 (read), <1.2 (write) Average seek, read (msec typical) 8.5 Average seek, write (msec typical) 9.5 Seek power (typical) Operating power (typical) Idle mode (typical) Standby mode (typical)

Sleep mode Voltage tolerance

(including noise) Ambient temperature Temperature gradient

(°C per hour max) Relative humidity Relative humidity gradient 30% per hour max

Wet bulb temperature (°C max)

Altitude, operating Altitude, nonoperating

(meters below mean sea level, max) Shock, operating (Gs max at 2 msec) 63 Shock, nonoperating (Gs max at 2 msec) 350 Gs

Vibration, operating

Vibration, nonoperating Drive acoustics, sound power (bels) Idle*

Performance seek Nonrecoverable read errors 1 per 10

Mean time between failures (power-on hours)

Service life 5 years

Warranty

See Table 4 and Table 5 on page8.

5V ± 5% 12V ± 10%

5° to 55°C (op.) –40° to 70°C (nonop.)

20°C (operating) 30°C (nonoperating)

5% to 90% (operating) 5% to 95% (nonoperating)

33 (operating) 40 (nonoperating)

–60.96 m to 3,048 m (–200 ft to 10,000

–60.96 m to 12,192 m (–200 ft to 40,000

5–22 Hz: Limited displacement 23–350 Hz: 0.5 G acceleration

5–22 Hz: Limited displacement 23–350 Hz: 5.0 Gs

<2.5 (typical)

2.7 (max)

3.4 (typical)

3.7 (max)

600,000

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

+ ft) + ft)

bits read

ST3160827AS ST3160023AS ST3160021AS

0° to 60°C (op.) –40° to 70°C (nonop.)

ST3120827AS ST3120026AS ST3120022AS

ST380817AS ST380013AS ST380011AS

ST340111AS ST340014AS

<2.2 (typ)

2.4 (max)

3.1 (typical)

3.5 (max)

4 Barracuda 7200.7 Serial ATA Product Manual, Rev. N

Table 2: Drive specifications

Drive specification ST3200822AS

Contact start-stop cycles (25°C, 40% relative 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 activity may occur according to the S .M.A.R.T. specification, which may increase acoustic and

power to operational levels.

50,000

Yes

ST3160827AS ST3160023AS ST3160021AS

ST3120827AS ST3120026AS ST3120022AS

ST380817AS ST380013AS ST380011AS

ST340111AS ST340014AS

2.2 Formatted capacity

Model Formatted capacity* Guaranteed sectors Bytes per sector

ST3200822AS 200 Gbytes 390,721,968 512 ST3160827AS

ST3160023AS ST3160021AS

ST3120827AS ST3120026AS ST3120022AS

ST380817AS ST380013AS ST380011AS

160 Gbytes 312,581,808 512

120 Gbytes 234,441,648 512

80 Gbytes 156,301,488 512

ST340111AS ST340014AS

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

and formatting.

40 Gbytes 78,165,360 512

2.2.1 LBA mode

When addressing these d rives in LBA mode, all bl ocks (sectors) are c onsecutively numbered fr om 0 to n–1, where n is the number of guaranteed sectors as defined above.

See Section 4.3.1, "Id enti fy Devi ce co mmand" (words 60-61 a nd 1 00- 10 3) for a ddi tio nal in for ma tio n ab out 48bit addressing support of drives with capacities over 137 Gbytes.

2.3 Default logical geometry

Cylinders Read/write heads Sectors per track

16,383 16 63

LBA mode

When addressing these d rives in LBA mode, all bl ocks (sectors) are c onsecutively numbered fr om 0 to n–1, where n is the number of guaranteed sectors as defined above.

Barracuda 7200.7 Serial ATA Product Manual, Rev. N 5

2.4 Physical organization

Drive model Read/write heads Number of discs

ST3200822AS, ST3160827AS, ST3160023AS and ST3160021AS 4 2 ST3120827AS, ST3120026AS and ST3120022AS 3 2 ST380817AS, ST380013AS and ST380011AS 2 1 ST340111AS and ST340014AS 1 1

2.5 Recording and interface technology

Interface Serial ATA (SATA) Recording method 16/17 EPRML Recording density BPI (bits/inch max) 595,000 (671,500 on ST3200822AS model) Track density TPI (tracks/inch max) 94,600 (98,000 on ST3200822AS model)

Areal density (Gbits/inch Spindle speed (RPM) (± 0.2%) 7,200 Maximum Internal transfer rate (Mbytes/sec) 85.4 Sustained transfer rate OD (Mbytes/sec max) 58

max) 56.3 (68.5 on ST3200822AS model)

I/O data-transfer rate (Mbytes/sec max) 150 (SATA 1.0) Interleave 1:1 Cache buffer

ST3200822AS, ST3160827AS, ST3160023AS, ST3120827AS, ST3120026AS, ST380817AS, ST380013AS and ST340111AS

ST3160021AS, ST3120022AS, ST380011AS, and ST340014AS

8 Mbytes

2 Mbytes

2.5.1 Physical characteristics

Drive specification

Maximum height

(mm) (inches)

Maximum width

(mm) (inches)

Maximum lengt h

(mm) (inches)

Typic al we ig ht

(grams) (pounds)

26.035

1.028

101.6

4.00

146.99

5.787

635

1.4

6 Barracuda 7200.7 Serial ATA Product Manual, Rev. N

2.6 Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table below are defined as follows:

• Track-to-track seek time is an average of all possible single-track seeks in both directions.

• Average seek time is a true statistical rand om average of at least 5,000 measure ments of seeks between random tracks, less overhead.

T able 3: Typical seek times

*Typical seek times (msec) Read Write

Track-to-track <1.0 <1.2 Average 8.5 9.5 Average latency 4.16 4.16

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

seeks, regardless of m ode (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 s eeks may produce results that vary from these specifications.

2.7 Start/stop times

Power-on to Ready (sec) 10 (max) Standby to Ready (sec) 10 (max) Ready to spindle stop (sec) 10 (max)

2.8 Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 4 on page 20.

2.8.1 Power consumption

Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on an average of drives tested, under nomi nal conditions, using 5.0 V and 12.0V input vo ltage at 25°C ambient temperature.

• Spinup power

Spinup power is measured from the tim e of power-on to the ti me that the drive sp indle reaches ope rating speed.

• Seek mode

During seek mode, the read/wr ite actuator arm moves towar d a specific position on the disc s urface and does not execute a read or write o peration . Servo el ectroni cs are active. S eek mode po wer repr esen ts the worst-case power co nsump tion, us ing o nly ran dom s eeks with read or wr ite la tency ti me. This mode is no t typical and is provided for worst-case information.

• Read/write power and current

Read/write power is measured with the heads on track, ba sed on a 16- sector write fo llowed by a 32-msec delay, then a 16-sector read followed by a 32-msec delay.

Barracuda 7200.7 Serial ATA Product Manual, Rev. N 7

• Operating power and current

Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each 10 reads) and 20 percent drive idle mode.

• 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 accep ts co mmands, b ut the driv e is not spi nning , and the se rvo and read / write electronics are in power-down mode.

Table 4: DC power requirements (example of 160GB models supporting NCQ

Power dissipation (watts)

Spinup — — 2.8 (peak) Idle 7.5 0.487 0.422 Idle (with offline activity) Operating (40% r/w, 40% seek, 20% inop.) 12.0 0.631 0.737 Seeking 12.5 0.405 0.873 Standby/Sleep 1.0 0.185 0.006

[2]

Average (watts, 25° C)

9.3 0.875 0.41

5V typ amps

12V typ amps

[1]

)

Table 5: DC power requirements (example of 160GB and 200GB models not supporting NCQ)

Power dissipation (watts)

Spinup — — 2.8 (peak) Idle 7.5 0.482 0.424 Idle (with offline activity) Operating (40% r/w, 40% seek, 20% inop.) 12.1 0.638 0.739

[2]

Average (watts, 25° C)

9.3 0.587 0.53

5V typ amps

12V typ amps

Seeking 12.5 0.412 0.87 Standby/Sleep 2.0 0.367 0.014

[1] NCQ may not be enabled during power measurements. [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 Barracuda 7200.7 Serial ATA Product Manual, Rev. N

2.8.1.1 T ypical current profiles

1.50

1.25

1.00

mps

0.75

0.50

0.25

0.0

0.0 2 4 6 8 10 12 14 16

+5 Volt Current during spindle start — Typical Amperes

Seconds

Figure 1. Typical 5V startup and operation current profile

2.4

2.0

+12 Volt Current during spindle start — Typical Amperes

1.6

mps

1.2

0.8

0.4

0.0

0.0 2 4 6 8 10 12 14 16

Seconds

Figure 2. Typical 12V startup and operation current profile

2.8.2 Deferred spinup

Barracuda 7200.7 S erial ATA drives provide a deferred spi nup feature which storage sub system controllers can use to sequence disc drive initializa tion. This is beneficial to systems which include m ultiple Serial ATA hard disc drives beca use it allo ws subsystem c ontroll ers to stagger the spinup of ea ch drive to ac commodat e available power supply current. This feature does not impact time-to-ready in typical desktop systems.

To accommodate the deferred spinup of multiple disc drives in an enclosure, Barracuda 7200.7 Serial ATA disc drives will spin u p only after power is appl ied to the d rive and after s uccessful PHY (Physi cal layer) i nitialization. PHY initialization occurs after the PHY enters the DP7:DR_Ready state. This state is reached after a suc-

Barracuda 7200.7 Serial ATA Product Manual, Rev. N 9

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