Seagate ST9250310AS Formatted capacity, Default logical geometry, Physical organization, LBA mode

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3.2Formatted capacity

	Formatted	Guaranteed	Bytes per
Model	capacity*	logical blocks	physical sector

ST9640322AS	640GB	1,250,263,728

ST9400321AS	400GB	781,422,768	4096

ST9320312AS	320GB	625,142,448
ST9640320AS	640GB	1,250,263,728

ST9500320AS	500GB	976,773,168

ST9320310AS	320GB	625,142,448	512

ST9250310AS	250GB	488,397,168

ST9160316AS	160GB	312,581,808

*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.

3.2.1LBA mode

When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,where n is the number of guaranteed logical blocks as defined above.

See Section 5.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48- bit addressing support of drives with capacities over 137GB.

3.3Default logical geometry

Cylinders	Read/write heads	Sectors per track

16,383	16	63

LBA mode

When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,where n is the number of guaranteed logical blocks as defined above.

3.4Physical organization

	Drive model	Read/write heads	Number of discs

	ST9640322AS
	ST9640320AS	4	2
	ST9500320AS	4	2
	ST9500320AS

	ST9400321AS

	ST9320312AS
	ST9320310AS	2	1
		2
	ST9250310AS
	ST9250310AS

	ST9160316AS	1

8	Momentus Product Manual, Rev. D

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Contents Momentus Revision history Revision DateContents Momentus Product Manual, Rev. D List of Figures Page Seagate Technology support services Seagate Online Support and ServicesByte/sector models Introduction4K byte/sector models About the Serial ATA interface Drive specifications for 640, 500 and 400GB models Drive specificationsSpecification summary table To 12,192 m -1000 ft to 40,000 ft Drive specifications for 320, 250 and 160GB models Drive specifications for 320, 250 and 160GB models Formatted capacity Default logical geometryLBA mode Physical organizationSeek time Physical characteristicsRecording and interface technology Typical seek timesPower specifications Start/stop timesConducted noise Typical current profileDeferred spinup Voltage toleranceActive mode Power-management modesPower management modes Idle modeEnvironmental specifications Nonoperating shock ShockOperating shock VibrationElectromagnetic immunity Drive A-weighted Sound Power Levels SWL, BAAcoustics Test for Prominent Discrete Tones PDTsReliability Safety certificationMeasurement type Specification Agency certificationFCC verification Korean RRLAustralian C-Tick N176 European Union Restriction of Hazardous Substances RoHS Environmental protectionCorrosive environment China Restriction of Hazardous Substances RoHS DirectiveConfiguring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsDrive mounting Top cover stiffness/deflectionMeasurements shown in are in inches Serial ATA Sata interface Serial ATA connector pin definitionsSignal Segment Pin Function DefinitionPin Function Definition P10 Ground 2nd mate P11 ReservedSupported ATA commands Command name Command code in hex ATA-standard commandsCommand name Command code in hex ATA-standard security commandsIdentify Device command Word Description ValueXx07H Description if bit is set to Bit Set Features command Set Features command valuesCode in features register A.R.T. command 3 S.M.A.R.T. commandsM.A.R.T. commands Momentus Product Manual, Rev. D Index Page Page Momentus Product Manual, Rev. D Page Seagate Technology LLC