Seagate ST34311A, ST32112A, ST38421A, ST36421A manual ATA Interface commands Supported ATA commands

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U4 Family Product Manual, Rev. D

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3.2 ATA Interface commands

3.2.1 Supported ATA commands

The following table lists ATA-standard commands that the drive sup- ports. For a detailed description of the ATA commands, refer to the Draft ATA-4 Standard. See Section 3.2.4 on page 30 for details and subcom- mands used in the S.M.A.R.T. implementation.

Command name	Command code (in hex)


ATA-standard commands

Download Microcode	92H

Execute Device Diagnostics	90H

Flush Cache	E7H

Format Track	50H

Identify Device	ECH

Initialize Device Parameters	91H

Read Buffer	E4H

Read DMA	C8H, C9H

Read Multiple	C4H

Read Sectors	20H, 21H

Read Verify Sectors	40H, 41H

Recalibrate	10H

Seek	70H

Set Features	EFH

Set Multiple Mode	C6H

S.M.A.R.T.	B0H

Write Buffer	E8H

Write DMA	CAH, CBH

Write Multiple	C5H

Image 31

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 currentTypical current profile Power Mode Typical Watts Typical Amps RMS 12VCurrent amps Time seconds Conducted noise Power-management modesVoltage tolerance Relative Humidity Environmental tolerances Ambient temperatureTemperature gradient HumidityOperating shock Wet bulb temperatureAltitude ShockNonoperating vibration Operating 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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