Recording and interface technology, Seek time | Seagate ST36421A

6U4 Family Product Manual, Rev. D

1.3 Recording and interface technology

Interface	ATA
Recording method	16/17 EPRML
Recording density BPI (bits/inch)	241,000
Track density TPI (tracks/inch)	13,100
Areal density (Mbits/inch2 max)	3,179
Spindle speed (RPM) (± 0.2%)	5,400
Internal data-transfer rate
(Mbits/sec max)	206
I/O data-transfer rate	16.6	(PIO mode 4)
(Mbytes /sec max)	66.6	(Ultra DMA mode 4)
Interleave	1:1
Cache buffer (Kbytes)	256

1.4 Physical characteristics

Drive Specification		ST38421A, ST36421A,
		ST34311A, ST32112A


Maximum height	(mm)	26.1
	(inches)	1.028

Maximum width	(mm)	101.8
	(inches)	4.020

Maximum length	(mm)	147.0
	(inches)	5.78

Typical weight	(grams)	580
	(pounds)	1.2

1.5 Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The spec- ifications in the table below are defined as follows:

•Track-to-track seek time is an average of all possible single-track seeks in both directions.

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Seagate ST36421A, ST32112A, ST38421A, ST34311A manual Recording and interface technology, Physical characteristics, Seek time

Contents

Product Manual Page Product Manual Page Contents Configuring and mounting the drive ATA interface Figures Seagate Connfidential Review Draft not for Distribution Seagate Confidential Review Draft not for Distribution Introduction Specification summary table Track-to-track seek time Msec typical Vibration, nonoperating Formatted capacity Default logical geometryLBA Mode Physical organization Recording and interface technology Physical characteristicsDrive Specification ST38421A, ST36421A ST34311A, ST32112A Seek time Spinup power Power specificationsPower consumption Start/stop times Operating power and current Seek ModeRead/Write power and current Idle mode power Current amps Time seconds Power Mode Typical Watts Typical Amps RMS 12VTypical current profile Voltage tolerance Power-management modesConducted noise Humidity Environmental tolerances Ambient temperatureTemperature gradient Relative Humidity Shock Wet bulb temperatureAltitude Operating shock Drive acoustics Operating vibrationNonoperating vibration Reliability Agency certification Safety certificationElectromagnetic susceptibility Electromagnetic compatibility FCC verification Australian C-Tick U4 Family Product Manual, Rev. D Configuring and mounting the drive Handling and static-discharge precautions Jumper settings Master/slave configuration Master/slave jumper settings Ultra ATA/66 cable Important mounting precautionsCable-select option Drive mounting Mounting dimensions-top, side and end view ATA interface signals and connector pins ATA interface O pins and supported ATA signals ATA Interface commands Supported ATA commands Command name Command code in hex ATA-standard commands ATA-standard power-management commands Identify Drive commandCommand name ATA-standard security commands Word Description 27-46 Drive model number 40 Ascii char Multiword DMA active and modes Description if bit is set to Bit Word Set Features command 0CH 4 S.M.A.R.T. commands Code in Features Register A.R.T. CommandPage U4 Family Product Manual, Rev. D U4 Family Product Manual, Rev. D