Seagate Explore Interface Technology for ST3320620NS and ST3400620NS Models

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2.4Recording and interface technology

	750GB	500GB		400GB	320GB	250GB

Interface	Serial ATA (SATA)

Recording method	Perpendicular

Recording density, KBPI (kbits/inch max)	926	813		781		813

Track density, KTPI (ktracks/inch avg)	145

Areal density (Gbits/inch2 avg)	128.2	114.4
Spindle speed (RPM) (± 0.2%)	7,200

Internal data transfer rate (Mbits/sec max)	1,030

Sustained data transfer rate (Mbytes/sec max)	78	72

I/O data-transfer rate (Mbytes/sec max)	300 (Ultra DMA mode 5)

2.5	Physical characteristics

Maximum height		26.1 mm (1.028 inches)

Maximum width		101.6 mm (4.000 +/- 0.010 inches)

Maximum length		146.99 mm (5.787 inches)

Max weight
	ST3750640NS and ST3750840NS	720 grams (1.59 lbs)
	ST3500630NS, ST3500830NS, ST3400620NS,	635 grams (1.4 lbs)
	ST3400820NS, ST3320620NS and ST3320820NS
	ST3250620NS and ST3250820NS	580 grams (1.28 lbs)

Cache buffer
	ST3750640NS	16 Mbytes (16,384 kbytes)
	ST3500630NS
	ST3400620NS
	ST3320620NS
	ST3250620NS
	ST3750840NS	8 Mbytes (8,192 kbytes)
	ST3500830NS
	ST3400820NS
	ST3320820NS
	ST3250820NS

Barracuda ES Serial ATA Product Manual, Rev. D

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Contents Barracuda ES Serial ATA Revision Date Revision historyContents Barracuda ES Serial ATA Product Manual, Rev. D List of Figures Page Introduction About the Serial ATA interface Specification summary tables Drive specificationsDrive specification ST3750640NS ST3750840NS Drive specifications summary for 750 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3500630NS ST3500830NS Drive specifications summary for 500 Gbyte modelsFollowing web Drive specification ST3400620NS ST3400820NS Drive specifications summary for 400 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3320620NS ST3320820NS Drive specifications summary for 320 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3250620NS ST3250820NS Drive specifications summary for 250 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D LBA mode Default logical geometryFormatted capacity Cylinders Read/write heads Sectors per track 16,383Physical characteristics Recording and interface technology750GB 500GB 400GB 320GB 250GB Seek time Start/stop timesTypical seek times msec Read Write Power specifications Typical current profiles Conducted noiseVoltage tolerance Active mode Power-management modesIdle mode Sleep modeEnvironmental specifications Vibration AcousticsOperating vibration Nonoperating vibrationElectromagnetic immunity Radio frequency environmentsTest Description Performance level Reference standard Reliability Safety certificationAgency certification Electromagnetic compatibilityKorean RRL Australian C-Tick N176FCC verification Environmental protection Corrosive environmentChina Restriction of Hazardous Substances RoHS Directive Barracuda ES Serial ATA Product Manual, Rev. D Handling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions-top, side and end viewBarracuda ES Serial ATA Product Manual, Rev. D Hot-Plug compatibility Serial ATA Sata interfaceSerial ATA connector pin definitions Serial ATA device plug connector pin definitionsSignal Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex F4H Word Description Value Identify Device commandXx07H 128 Security status 0001H 129 Seagate-reserved Bit Word Description if bit is set to Bit WordSet Features command values Set Features command3 S.M.A.R.T. commands M.A.R.T. commandsCode in features register A.R.T. command Internet Presales SupportTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index ITE Page Barracuda ES Serial ATA Product Manual, Rev. D Page Disc Drive, Scotts Valley, California 95066-4544, USA

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