Seagate ST38421A, ST32112A Typical current profile, Power Mode Typical Watts Typical Amps RMS 12V

Page 17

U4 Family Product Manual, Rev. D			9

Power Mode	Typical Watts	Typical Amps RMS

		5V	12V
	RMS	5V	12V


Spinup	—	—	1.5 (peak)

Seek (Random, no
read/write)	7.0	0.39	0.42

Operating	5.7	0.34	0.33

Idle	3.1	0.24	0.16

Standby/Sleep	0.8	0.14	0.01

1.7.1.1 Typical current profile

Figure 1 shows a typical current profile.

Current (amps)

1.2
1.0
0.8
0.6
0.4
0.2
0	2	3	4	5	6	7	8
1	2	3	4	5	6	7	8

Time (seconds)

Figure 1. Typical startup and operation current profile

Image 17

Contents Product Manual Page Product Manual Page Contents ATA interface Configuring and mounting the driveSeagate Connfidential Review Draft not for Distribution FiguresSeagate Confidential Review Draft not for Distribution Introduction Specification summary table Track-to-track seek time Msec typical Vibration, nonoperating LBA Mode Default logical geometryFormatted capacity Physical organizationDrive Specification ST38421A, ST36421A ST34311A, ST32112A Physical characteristicsRecording and interface technology Seek timePower consumption Power specificationsSpinup power Start/stop timesRead/Write power and current Seek ModeOperating power and current Idle mode powerCurrent amps Time seconds Power Mode Typical Watts Typical Amps RMS 12VTypical current profile Voltage tolerance Power-management modesConducted noise Temperature gradient Environmental tolerances Ambient temperatureHumidity Relative HumidityAltitude Wet bulb temperatureShock Operating shockDrive acoustics Operating vibrationNonoperating vibration Electromagnetic susceptibility Agency certification Safety certificationReliability Electromagnetic compatibilityAustralian C-Tick FCC verificationU4 Family Product Manual, Rev. D Handling and static-discharge precautions Configuring and mounting the driveMaster/slave jumper settings Jumper settings Master/slave configurationCable-select option Important mounting precautionsUltra ATA/66 cable Drive mountingMounting dimensions-top, side and end view ATA interface ATA interface signals and connector pinsO pins and supported ATA signals Command name Command code in hex ATA-standard commands ATA Interface commands Supported ATA commandsCommand name Identify Drive commandATA-standard power-management commands ATA-standard security commandsWord Description 27-46 Drive model number 40 Ascii char Multiword DMA active and modes Description if bit is set to Bit Word 0CH Set Features commandCode in Features Register A.R.T. Command 4 S.M.A.R.T. commandsPage U4 Family Product Manual, Rev. D U4 Family Product Manual, Rev. D

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