Seagate DB35.4 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 18.

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.

• 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.

• Operating (CE seek profile)

Operating power is measured by simulating a typical PVR operating environment, using a 50% write 50% read algorithm.

• 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 2:	DC power requirements

Power dissipation		Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps

Spinup		—	—	2.0 (peak)

Idle*		5.33	0.415	0.272

Operating (CE seek profile)		7.97	0.641	0.397

Standby		1.06	0.115	0.040

Sleep		1.06	0.115	0.040

*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	DB35.4 Series SATA Product Manual, Rev. C

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Contents

DB35.4 Series Sata ST3250310CSRevision history Revision DateContents DB35.4 Series Sata Product Manual, Rev. C List of Figures Page Introduction About the Serial ATA interface Drive specifications Specification summary tables Drive specifications summary for 250 Gbyte model Drive specification ST3250310CSDB35.4 Series Sata Product Manual, Rev. C Formatted capacity Default logical geometryLBA mode Recording and interface technologyStart/stop times Physical characteristicsSeek time Typical seek times msec Read WritePower specifications Voltage tolerance Typical current profilesConducted noise Idle mode Power-management modesActive mode Sleep modeEnvironmental specifications Nonoperating vibration VibrationOperating vibration Electromagnetic immunity Drive A-weighted Sound Power Levels SWL, BAAcoustics emissions Test for Prominent Discrete Tones PDTsAgency certification Safety certificationReliability Annualized Failure Rate AFRFCC verification Korean RRLAustralian C-Tick N176 China Restriction of Hazardous Substances RoHS Directive Environmental protectionCorrosive environment Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions Drive mountingDB35.4 Series Sata Product Manual, Rev. C Serial ATA Sata interface Hot-Plug compatibilitySignal Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions Pin Function DefinitionCommand name Command code in hex Supported ATA commandsSupported ATA commands F4H Identify Device command Word Description ValueXx07H 129 Seagate-reserved Description if bit is set to Bit Word Bit WordSet Features command Set Features command valuesCode in features register A.R.T. command 3 S.M.A.R.T. commandsA.R.T. commands Presales Support Seagate Technology support servicesInternet Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index ITE Page DB35.4 Series Sata Product Manual, Rev. C Page Seagate Technology LLC