Seagate ST3250820SCE, ST3300820SCE Operating power and current, Idle mode power, Standby mode

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• 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 5:	DC power requirements

Power dissipation (ST3750640SCE values shown)		Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps

Spinup		—	—	2.0 (peak)

Idle*		9.30	0.611	0.540

Idle* (with offline activity)		10.40	0.719	0.567

Operating (CE seeks)		9.4	0.580	0.540

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.

2.8.1.1Typical current profiles

Figure 1. Typical 5V startup and operation current profile

DB35.3 Series Serial ATA Product Manual, Rev. D

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Contents

DB35.3 Series Serial ATA Revision Date Sheets affected or comments Revision historyContents DB35.3 Series Serial ATA Product Manual, Rev. D List of Figures Page Introduction About the Serial ATA interface Specification summary tables Drive specificationsDrive specification ST3750640SCE ST3750840SCE Drive specifications summary for 750 Gbyte modelsDB35.3 Series Serial ATA Product Manual, Rev. D Drive specification ST3500830SCE ST3400820SCE Drive specifications summary for 500 and 400 Gbyte modelsFollowing web Drive specification ST3320820SCE ST3300820SCE Drive specifications summary for 320 and 300 Gbyte modelsDB35.3 Series Serial ATA Product Manual, Rev. D Drive specification ST3250820SCE Drive specifications summary for 250 Gbyte models Information for your drive LBA mode Default logical geometryFormatted capacity Cylinders Read/write heads Sectors per track 16,383Drive specification Physical characteristicsRecording and interface technology 750GB 500GB 400GB 320GB 300GB 250GBPower specifications Seek timeStart/stop times Idle mode power Operating power and currentStandby mode DC power requirementsActive mode Power-management modesPower modes Heads Spindle Buffer Conducted noiseIdle mode Sleep modeIdle and Standby timers Environmental specifications 4 Disc models Nonoperating shock Disc modelsVibration Operating vibrationAcoustics Fluid Dynamic Bearing FDB motor acousticsIdle CE seek profile Electromagnetic immunity ReliabilityAgency certification Korean RRL Australian C-Tick N176FCC verification RoHS MCV Environmental protectionPage Handling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions-top, side and end viewDB35.3 Series Serial ATA Product Manual, Rev. D Hot-Plug compatibility Serial ATA Sata interfaceSerial ATA connector pin definitions Serial ATA device plug connector pin definitionsSignal Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex F4H Word Description Value Identify Device commandXx07H 159 160 ATA-reserved 0000H 254 255 Integrity word XxA5H Bit Word Description if bit is set to Bit WordSet Features command values Set Features command3 S.M.A.R.T. commands M.A.R.T. commandsCode in features register A.R.T. command Internet Presales SupportTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index RRL Sata DB35.3 Series Serial ATA Product Manual, Rev. D Page Seagate Technology LLC