Seagate ST3750640NS, ST3250820NS, ST3250620NS, ST3320620NS, ST3750840NS manual Power specifications

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2.8Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 4 on page 28.

2.8.1Power 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 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.

• 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 represents the worst-case power consumption, using only random seeks with read or write latency time. This mode is not typical and is provided for worst-case information.

• Read/write power and current

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

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

Table 6:

DC power requirements

 

 

 

 

 

 

 

Power dissipation (4-disc values shown)

Avg (watts 25° C)

Avg 5V typ amps

Avg 12V typ amps

 

 

 

 

 

Spinup

 

2.80 (peak)

 

 

 

 

 

Idle*

 

9.30

0.611

0.520

 

 

 

 

Idle* (with offline activity)

10.40

0.719

0.567

 

 

 

 

Operating (40% r/w, 40% seek, 20% inop.)

13.00

0.772

0.762

 

 

 

 

Seeking (random, 20% idle)

12.60

0.613

0.795

 

 

 

 

 

Standby

 

0.80

0.106

0.023

 

 

 

 

 

Sleep

 

0.80

0.106

0.023

 

 

 

 

 

*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.

Barracuda ES Serial ATA Product Manual, Rev. D

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Contents Barracuda ES Serial ATA Revision Date Revision historyContents Barracuda ES Serial ATA Product Manual, Rev. D List of Figures Page Introduction About the Serial ATA interface Specification summary tables Drive specificationsDrive specification ST3750640NS ST3750840NS Drive specifications summary for 750 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3500630NS ST3500830NS Drive specifications summary for 500 Gbyte modelsFollowing web Drive specification ST3400620NS ST3400820NS Drive specifications summary for 400 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3320620NS ST3320820NS Drive specifications summary for 320 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3250620NS ST3250820NS Drive specifications summary for 250 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Cylinders Read/write heads Sectors per track 16,383 Default logical geometryLBA mode Formatted capacity750GB 500GB 400GB 320GB 250GB Physical characteristicsRecording and interface technology Typical seek times msec Read Write Seek timeStart/stop times Power specifications Voltage tolerance Typical current profilesConducted noise Sleep mode Power-management modesActive mode Idle modeEnvironmental specifications Nonoperating vibration AcousticsVibration Operating vibrationTest Description Performance level Reference standard Electromagnetic immunityRadio frequency environments Electromagnetic compatibility Safety certificationReliability Agency certificationFCC verification Korean RRLAustralian C-Tick N176 China Restriction of Hazardous Substances RoHS Directive Environmental protectionCorrosive environment Barracuda ES Serial ATA Product Manual, Rev. D Handling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions-top, side and end viewBarracuda ES Serial ATA Product Manual, Rev. D Hot-Plug compatibility Serial ATA Sata interfacePin Function Definition Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions SignalCommand name Command code in hex Supported ATA commandsSupported ATA commands F4H Word Description Value Identify Device commandXx07H 128 Security status 0001H 129 Seagate-reserved Bit Word Description if bit is set to Bit WordSet Features command values Set Features commandCode in features register A.R.T. command 3 S.M.A.R.T. commandsM.A.R.T. commands Technical Support InternetPresales Support Data Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index ITE Page Barracuda ES Serial ATA Product Manual, Rev. D Page Disc Drive, Scotts Valley, California 95066-4544, USA
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