Seagate 7200-RPM Formatted capacity, Default logical geometry, Physical organization, LBA mode

Page 12

3.2Formatted capacity

	Model	Formatted capacity*	Guaranteed sectors	Bytes per sector
	Model	Formatted capacity*	Guaranteed sectors	(logical)
				(logical)

	ST9750423AS, ST9750423ASG,	750GB	1,465,149,168
	ST9750422AS, ST9750420AS and	750GB	1,465,149,168
	ST9750420ASG

	ST9640424AS, ST9640423AS and	640GB	1,250,263,728	512
	ST9640423ASG	640GB	1,250,263,728
	ST9640423ASG

	ST9500424AS, ST9500423AS and	500GB	976,773,168
	ST9500423ASG	500GB	976,773,168
	ST9500423ASG

*One Gbyte 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 sectors 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 sectors as defined above.

3.4	Physical organization

Drive model		Read/write heads	Number of discs

ST9750423AS, ST9750423ASG, ST9750422AS,
ST9750420AS and ST9750420ASG		4
		4	2
ST9640424AS, ST9640423AS and ST9640423ASG			2
ST9640424AS, ST9640423AS and ST9640423ASG

ST9500424AS, ST9500423AS and ST9500423ASG		4/3

6	Momentus Product Manual, Rev. B

Image 12

Contents Momentus Standard models Free-fall sensor modelsRevision history Revision Date Sheets affected or commentsContents Momentus Product Manual, Rev. B List of Figures Page Seagate Technology support services Seagate Online Support and ServicesIntroduction Standard models Free Fall Protection modelsAbout the Serial ATA interface Drive specifications Specification summary tableDrive specifications for 750, 640 and 500 GB models Altitude, nonoperating Default logical geometry LBA modeFormatted capacity Physical organizationPhysical characteristics Drive specificationRecording and interface technology Seek time Start/stop timesTypical seek times Typical seek times ms ReadPower specifications Typical current profile Conducted noise Voltage tolerancePower-management modes Power management modesActive mode Idle modeEnvironmental specifications Shock Operating shockNonoperating shock VibrationDrive A-weighted Sound Power Levels SWL, BA AcousticsElectromagnetic immunity Test for Prominent Discrete Tones PDTsFree Fall Protection feature Safety certificationReliability Agency certificationKorean RRL Australian C-Tick N176FCC verification Environmental protection Corrosive environmentEuropean Union Restriction of Hazardous Substances RoHS China Restriction of Hazardous Substances RoHS DirectiveConfiguring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions-top, side and end view Drive mountingSerial ATA Sata interface Hot-Plug compatibilitySerial ATA device plug connector pin definitions Serial ATA connector pin definitionsSignal Pin Function DefinitionSupported ATA commands Command name Command code in hex ATA-standard commandsCommand name Command code in hex ATA-standard security commandsIdentify Device command Word Description ValueXxxxH Fffeh Description if bit is set to Bit Set Features command Set Features command values3 S.M.A.R.T. commands A.R.T. commandsCode in features register A.R.T. command Momentus Product Manual, Rev. B Index ITE TPI Momentus Product Manual, Rev. B Page Seagate Technology LLC