Seagate ST94019A, ST93015A, ST92014A manual Power specifications

Page 18

2.9Power specifications

The drive receives DC power (+5V) through the interface connector.

2.9.1Power consumption

Power requirements for the drives are listed in the table on page 8. Typical power measurements are based on an average of drives tested, under nominal conditions, using 5.0V 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 is measured based on three random seek operations every 100 msecs. This mode is not typical.

•Read/write power and current

Read/write power is measured with the heads on track, based on three 63 sector read or write operations every 100 msecs.

•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 2:

DC power

 

 

 

 

 

Power dissipation (watts)

Average (watts, 25° C)

5V typical amps

 

 

 

 

Spinup

 

—

1.2

 

 

 

Idle, performance mode

2.00

0.4

 

 

 

 

Idle, active

 

1.20

0.24

 

 

 

Idle, low power mode

0.97

0.19

 

 

 

Operating 40% r/w.

 

 

40% seek, 20% inop.

2.87

0.72

 

 

 

 

Seeking

 

2.4

0.48

 

 

 

 

Read

 

2.4

0.48

 

 

 

 

Write

 

2.4

0.48

 

 

 

 

Standby

 

0.36

0.07

 

 

 

 

Sleep

 

0.36

0.07

 

 

 

 

*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.

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Momentus 42 Product Manual, Rev. A

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Contents Momentus Page Momentus Page Revision status summary sheet Rev. a 05/03/2004 AllRevision Date Sheets Affected Page Contents Momentus 42 Product Manual, Rev. a List of Figures Viii Momentus 42 Product Manual, Rev. a Introduction Momentus 42 disc driveMomentus 42 Product Manual, Rev. a Specifications Drive specificationsSpecification summary Drive specification ST94019A ST93015A ST92014ASpecifications Formatted capacity Default logical geometryLBA mode Physical organizationPhysical characteristics Technology SpecificationRecording and interface technology Typical seek times msec Read Write Seek timeTime to ready Time to ready Typical MaxPower specifications Typical current profile Conducted noiseVoltage tolerance Active mode Power-management modesPower management modes Idle modeEnvironmental specifications Nonoperating shock ShockOperating shock VibrationDrive level acoustics AcousticsElectromagnetic immunity Electromagnetic immunityReliability Safety certificationMeasurement type Specification Agency certificationKorean RRL Australian C-Tick N176FCC verification Momentus 42 Product Manual, Rev. a Jumper settings Configuring and mounting the driveHandling and static discharge precautions Master/slave configurationDrive mounting Cable-select optionConnector Cable Signal Name Contact Conductor ATA interface signals and connector pinsConnector signals Cable Connector Conductor Contact Signal NameSupported ATA commands Supported commandsCommand name Command code in hex ATA-standard commands Command name Command code in hex ATA-standard power-management commandsATA-standard security commands Identify Device command Word Description ValueXxxxH Description if bit is set to Bit Set Features command Features register values4 S.M.A.R.T. commands Supported S.M.A.R.T. commandsCode in features register A.R.T. command Presales Support Seagate Technology support servicesInternet MySeagate Reseller.seagate.com Technical SupportWarranty Service Authorized Service CentersAmericas SEAGATE2 +1-405-324-47003 +1-405-324-4702 Call Center Toll-free Direct dialAmericas +1-405-324-47301 +1-405-324-4704 Call Center Toll-free Direct dial FAX / InternetFAX Services-All Europe toll call Call Center Presales and Technical Support Warranty ServiceToll-Free Support Numbers Asia/Pacific Support Services Momentus 42 Product Manual, Rev. a Index NumericsPage Page Momentus 42 Product Manual, Rev. a Page Seagate Technology LLC
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