Seagate ST34311A manual Start/stop times, Power specifications, Power consumption, Spinup power

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U4 Family Product Manual, Rev. D

7

Average seek time is a true statistical random average of at least 5,000 measurements of seeks between random tracks, less overhead.

Full-stroke seek time is one-half the time needed to seek from the first data cylinder to the maximum data cylinder and back to the first data cylinder. The full-stroke typical value is determined by averaging 100 full-stroke seeks in both directions.

Typical seek times (msec)

Read

Write

 

 

 

 

 

 

Track-to-track

2.0

2.75

 

 

 

Average

10.5

11.5

 

 

 

Full-stroke

24.0

26.0

 

 

 

Average latency: 5.56 msec

 

 

 

Note. These drives are designed to consistently meet the seek times rep- resented in this manual. Physical seeks, regardless of mode (such as track-to-track and average) are expected to meet or exceed the noted values. However, due to the manner in which these drives are format- ted, benchmark tests that include command overhead or measure logical seeks may produce results that vary from these specifications.

1.6 Start/stop times

Power-on to Ready (sec)

8 (typical)

Standby to Ready (sec)

7 (typical)

Ready to spindle stop (sec)

10 (typical)

1.7 Power specifications

The drive receives DC power (+5V or +12V) through a four-pin standard drive power connector.

1.7.1 Power 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 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.

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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 Physical organization Default logical geometryLBA Mode Formatted capacitySeek time Physical characteristicsDrive Specification ST38421A, ST36421A ST34311A, ST32112A Recording and interface technologyStart/stop times Power specificationsPower consumption Spinup powerIdle mode power Seek ModeRead/Write power and current Operating power and currentPower Mode Typical Watts Typical Amps RMS 12V Typical current profileCurrent amps Time seconds Power-management modes Conducted noiseVoltage tolerance Relative Humidity Environmental tolerances Ambient temperatureTemperature gradient HumidityOperating shock Wet bulb temperatureAltitude ShockOperating vibration Nonoperating vibrationDrive acoustics Electromagnetic compatibility Agency certification Safety certificationElectromagnetic susceptibility ReliabilityAustralian 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 configurationDrive mounting Important mounting precautionsCable-select option Ultra ATA/66 cableMounting 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 commandsATA-standard security commands Identify Drive commandCommand name ATA-standard power-management 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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