Maxtor STM340215AS Power consumption, Spinup power, Idle mode power, Seek mode, Standby mode

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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.

• 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.

• 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 7: DC power requirements

STM3500630AS, STM3320620AS, STM3320820AS, STM3250820AS

STM3160815AS, STM3160215AS, STM380815AS, STM380215AS and STM340215AS

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

Spinup	—	—	2.8 (peak)

Idle*	9.30	0.611	0.520

Seeking (random, 20% idle)	12.60	0.613	0.795

Standby and Sleep	0.80	0.106	0.023

STM3250310AS
Power dissipation	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps

Spinup	—	—	2.0 (peak)

Idle*	5.35	0.528	0.226

Seeking (random, 20% idle)	8.35	0.573	0.458

Standby and Sleep	1.80	0.035	0.008

STM3250824AS
Power dissipation	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps

Spinup	—	—	2.8 (peak)

Idle*	7.75	0.512	0.432

Seeking (random, 20% idle)	11.35	0.497	0.738

Standby and Sleep	1.24	0.221	0.011

*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.

20	DiamondMax 21 Serial ATA Product Manual, Rev. C

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Contents DiamondMax Revision status summary sheet Contents DiamondMax 21 Serial ATA Product Manual, Rev. C List of Figures Typical 5V startup and operation current profilePage Introduction About the Serial ATA interface Drive specifications Specification summary tablesDrive specifications summary for 500 Gbyte models Drive specification STM3500630ASYes Drive specifications summary for 320 Gbyte models Drive specification STM3320820AS STM3320620ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for 250 Gbyte models Drive specification STM3250824AS STM3250820AS STM3250310ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for the 160 Gbyte models Drive specification STM3160815AS STM3160215ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for the 80 Gbyte model Drive specification STM380815AS STM380215ASYears on distribution units Drive specifications summary for the 40 Gbyte model Drive specification STM340215ASDiamondMax 21 Serial ATA Product Manual, Rev. C Formatted capacity Default logical geometryLBA mode Cylinders Read/write heads Sectors per track 16,383STM3250310AS STM380815AS, STM380215AS and STM340215AS Recording and interface technologySTM3160815AS, STM3160215AS Physical characteristics Start/stop times Power specificationsSeek time STM3250820AS 500-320 GB STM3250824AS STM3250310AS 160 40 GBIdle mode power Power consumptionSpinup power Seek modeVoltage tolerance Typical current profilesConducted noise Idle mode Power-management modesActive mode Sleep modeEnvironmental specifications Operating vibration Nonoperating shockVibration Nonoperating vibrationFluid Dynamic Bearing FDB motor acoustics AcousticsElectromagnetic immunity Radio frequency environmentsAgency certification Safety certificationReliability Electromagnetic compatibilityFCC 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 connectorsDrive mounting Drive dimensions for 40-160 GB and STM3250310AS models 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 100 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. commandsM.A.R.T. commands Maxtor support services DiamondMax 21 Serial ATA Product Manual, Rev. C Index ITE Page DiamondMax 21 Serial ATA Product Manual, Rev. C Page Seagate Technology LLC