Seagate ST3320418AS, ST31000528AS Recording and interface technology, Physical characteristics

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2.3Recording and interface technology

Interface	Serial ATA (SATA)

Recording method	Perpendicular

Recording density (kbits/inch max)	1413

Track density (ktracks/inch avg)	236

Areal density (Gbits/inch2 avg)	329
Spindle speed (RPM)	7,200 ± 0.2%

Internal data transfer rate (Mbits/sec max)	1695

Sustained data transfer rate (Mbytes/sec max)	125

I/O data-transfer rate (Mbytes/sec max)	300

2.4Physical characteristics

Maximum height
1000 and 750 GB models	26.1 mm (1.028 inches)
500, 320, 250 and 160 GB models	19.98 mm (0.787 inches)

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

Maximum length	146.99 mm (5.787 inches)

Typical weight
1000 and 750 GB models	655 grams (1.444 lbs)
500, 320, 250 and 160 GB models	415 grams (0.915 lbs)

Cache buffer
1000 and 750 GB models	32	Mbytes (32,768 kbytes)
500 and 320 GB models	16	Mbytes (16,384 kbytes)
250 and 160 GB models	8	Mbytes (8,192 kbytes)

Barracuda 7200.12 Serial ATA Product Manual, Rev. B

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Contents Barracuda 7200.12 Serial ATA Revision Date Sheets affected or comments Revision historyContents Barracuda 7200.12 Serial ATA Product Manual, Rev. B List of Figures Page Introduction About the Serial ATA interface Drive specifications Drive specifications summary for 1000 and 750 Gbyte models Will display the warranty information for your drive Drive specifications summary for 500 Gbyte models Tem will display the warranty information for your drive Drive specifications summary for 250 Gbyte models Will display the warranty information for your drive LBA mode Default logical geometryFormatted capacity Cylinders Read/write heads Sectors per track 16,383Recording and interface technology Physical characteristicsStart/stop times Seek timeTypical seek times msec Read Write 750 GB models 500, 320, 250 and 160 GB modelsPower specifications Active mode Power-management modesIdle mode Sleep modeEnvironmental specifications Operating shock ShockNonoperating shock 750 GB models 500, 320, 250 and 160 GB modelsElectromagnetic immunity AcousticsFluid Dynamic Bearing FDB motor acoustics Test for Prominent Discrete Tones PDTsReliability Safety certificationAgency certification Electromagnetic compatibilityFCC verification Korean RRLAustralian C-Tick N176 Corrosive environment Environmental protectionHandling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions 1000 and 750 GB modelsMounting dimensions 500, 320, 250 and 160 GB models Hot-Plug compatibility Serial ATA Sata interfaceSerial ATA connector pin definitions Serial ATA device plug connector pin definitionsSignal Pin Function DefinitionCommand name Command code in hex Supported ATA commandsSupported ATA commands F3H Word Description Value Identify Device commandXx07H Bit Word Description if bit is set to Bit WordShall be cleared to Set Features command values Set Features commandCode in features register A.R.T. command 3 S.M.A.R.T. commandsM.A.R.T. commands Technical Support Seagate Technology support servicesPresales Support Data Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index ITE Page Barracuda 7200.12 Serial ATA Product Manual, Rev. B Page Seagate Technology LLC