Seagate 7200-RPM, 5400-RPM manual Seek time, Start/stop times, Typical seek times ms Read

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3.7Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications 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.

•Average seek time is a true statistical random average of at least 5000 measurements of seeks between random tracks, less overhead.

Table 2:	Typical seek times

Typical seek times (ms)		Read

Track-to-track		1.5

Average		11.0

Full-stroke (ST9750423AS, ST9750423ASG, ST9640424AS,		27.0
ST9640423AS and ST9640423ASG models only)

Full-stroke (all other models)		22.0

Average latency (ST9750423AS, ST9750423ASG, ST9640424AS,		5.6
ST9640423AS and ST9640423ASG models only)

Average latency (all other models)		4.2

Note. These drives are designed to consistently meet the seek times represented in this manual. Physical seeks, regardless of mode (such as track-to-track and average), are expected to meet the noted values. However, due to the manner in which these drives are formatted, benchmark tests that include command overhead or measure logical seeks may produce results that vary from these specifications.

3.8Start/stop times

	ST9750423AS, ST9750423ASG,		ST9750422AS, ST9750420AS,
	ST9640424AS, ST9640423AS		ST9750420ASG, ST9500424AS,
	and ST9640423ASG,		ST9500423AS and ST9500423ASG

Time to ready	Typical	Max @ 25°C	Typical	Max @ 25°C

Power-on to Ready (sec)	3.6	5.1	4.0	5.5

Standby to Ready (sec)	2.5	4.0	3.0	4.5

8	Momentus Product Manual, Rev. B

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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 for 750, 640 and 500 GB models Drive specificationsSpecification summary table Altitude, nonoperating Formatted capacity Default logical geometryLBA mode Physical organizationRecording and interface technology Physical characteristicsDrive specification Typical seek times Seek timeStart/stop times Typical seek times ms ReadPower specifications Typical current profile Conducted noise 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 Free Fall Protection featureSafety certification 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 connectorsMounting dimensions-top, side and end view Drive mountingSerial ATA Sata interface Hot-Plug compatibilitySignal Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions 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 valuesCode in features register A.R.T. command 3 S.M.A.R.T. commandsA.R.T. commands Momentus Product Manual, Rev. B Index ITE TPI Momentus Product Manual, Rev. B Page Seagate Technology LLC