Seagate ST9500325AS Physical characteristics, Seek time, Start/stop times, Typical seek times

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2.6Physical characteristics

Drive specification

Height	(mm)	9.5 +/-0.2
	(inches)	0.374 +/-0.0079
Width	(mm)	69.85 +/-0.25
	(inches)	2.75 +/-0.0098
Length	(mm)	100.35 +0.20 / -0.25
	(inches)	3.957 +0.0079 / -0.0098
Weight (max)		98.8 grams
	ST9500325AS	98.8 grams
	ST9500325ASG	0.218 pounds
	ST9400326AS
	ST9320325AS
	ST9320325ASG
	ST9250315AS	93.5 grams
	ST9250315ASG	0.206 pounds
	ST9160314AS
	ST9160314ASG
	ST9120315AS
	ST9120315ASG
	ST980313AS
	ST980313ASG
	ST9160301AS	105 grams
		0.23 pounds

2.7Seek 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 5,000 measurements of seeks between random tracks, less overhead.

Table 4: Typical seek times

Seek times (msec)	Read

Track-to-track (typical)	1

Average (typical)	14

Full-stroke (max)	30

Average latency	5.56

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.

2.8Start/stop times

Time to ready	Typical	Max @ 25°C

Power-on to Ready (sec)	3.6	3.8

Standby to Ready (sec)	1.8	2

10	Momentus 5400.6 SATA Product Manual, Rev. E

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Contents Momentus 5400.6 Sata Page Contents Momentus 5400.6 Sata Product Manual, Rev. E List of Figures Page Introduction About the Serial ATA interface Specification summary table Drive specificationsDrive specifications for 500, 400 and 320 GB models Revision 2.6 specification See notes after Table Drive specifications for 250 and 160 GB models Drive specifications for 250 and 160 GB models Drive specifications for 120 and 80 GB models Formatted Guaranteed Bytes per Model Capacity Sectors Formatted capacityDefault logical geometry LBA modePhysical organization Recording and interface technologyPhysical characteristics Seek timeStart/stop times Typical seek timesPower specifications Typical current profile Deferred spinupConducted 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 PDTsMeasurement type Specification Free Fall Protection featureReliability Safety certification Agency certificationElectromagnetic compatibility Korean RRLFCC 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 connectorsDrive mounting Top cover stiffness/deflectionMeasurements shown in are in inches Serial ATA connector pin definitions SignalSerial ATA Sata interface 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 ValueXxxxH Description if bit is set to Bit Momentus 5400.6 Sata Product Manual, Rev. E Set Features command Set Features command valuesM.A.R.T. commands 3 S.M.A.R.T. commandsCode in features register A.R.T. command Presales Support Seagate Technology support servicesTechnical Support Data Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index Page Page Momentus 5400.6 Sata Product Manual, Rev. E Page Seagate Technology LLC

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