Seagate ST940110A manual Recording and interface technology, Physical characteristics, Seek time

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2.5Recording and interface technology

Technology	Specification

Interface	Parallel ATA

Recording method	RLL 0,11

Recording density BPI (bits/inch max)	642,000

Track density TPI (tracks/inch max)	100,780

Areal density (Mbits/inch2 max)	65
Spindle speed (RPM) (± 0.2%)	4,200 class performance (spin speed actually 5,400 RPM)

Internal data-transfer rate OD (Mbytes/sec max)	48.25

Sustained data transfer rate OD (Mbytes/sec max)	31.0

I/O data-transfer rate (Mbytes/sec max)	100 (Ultra DMA mode 5)

Interleave	1:1

Cache buffer	2 Mbytes (2,048 kbytes)

2.6Physical characteristics

Height	(mm)	9.5 +/-0.2
	(inches)	0.374	+/-0.0078

Width	(mm)	69.85	+/-0.25
	(inches)	2.75	+/-0.0098

Length	(mm)	100.2	+/-0.25
	(inches)	3.945	+/-0.0098

Typical weight	(grams)	99
	(pounds)	0.218

2.7Seek time

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

*Typical seek times (msec)	Read	Write

Track-to-track	1.5	2.0

Average	12.0	14.0

Full-stroke	22.0	26.0

Average latency	5.6	5.6

*Measured in performance mode

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 or exceed the noted values.

6	Momentus 4200 N-Lite Product Manual, Rev. A

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Contents Momentus 4200 N-Lite Page Momentus 4200 N-Lite Page Rev. a 10/26/2004 All Revision status summary sheetRevision Date Sheets Affected Page Contents Momentus 4200 N-Lite Product Manual, Rev. a List of Figures Viii Momentus 4200 N-Lite Product Manual, Rev. a Introduction Momentus 4200 N-Lite disc driveMomentus 4200 N-Lite Product Manual, Rev. a Drive specifications Specification summarySpecifications Drive specification ST940110ASpecifications Default logical geometry LBA modeFormatted capacity Physical organizationPhysical characteristics Technology SpecificationRecording and interface technology Seek timePower specifications Time to readyConducted noise Typical current profileVoltage tolerance Power-management modes Power management modesActive mode Idle modeEnvironmental specifications Shock Operating shockNonoperating shock VibrationAcoustics Electromagnetic immunityDrive level acoustics Electromagnetic immunitySafety certification Measurement type SpecificationReliability Agency certificationAustralian C-Tick N176 Korean RRLFCC verification Configuring and mounting the drive Handling and static discharge precautionsJumper settings Master/slave configurationDrive mounting Cable-select optionATA interface signals and connector pins Connector signalsConnector Cable Signal Name Contact Conductor Cable Connector Conductor Contact Signal NameSupported commands Supported ATA commandsCommand name Command code in hex ATA-standard commands ATA-standard power-management commands Command name Command code in hexATA-standard security commands Identify Device command Word Description ValueXx07H Description if bit is set to Bit Features register values Set Features command4 S.M.A.R.T. commands Supported S.M.A.R.T. commands Code in features register A.R.T. commandSeagate Technology support services Internet MySeagate Reseller.seagate.comPresales Support Technical SupportWarranty Service Authorized Service CentersCall Center Toll-free Direct dial Americas +1-405-324-47301 +1-405-324-4704Americas SEAGATE2 +1-405-324-47003 +1-405-324-4702 Call Center Toll-free Direct dial FAX / InternetCall Center Presales and Technical Support Warranty Service FAX Services-All Europe toll callToll-Free Support Numbers Asia/Pacific Support Services Momentus 4200 N-Lite Product Manual, Rev. a Index NumericsPage Page Momentus 4200 N-Lite Product Manual, Rev. a Page Seagate Technology LLC