Seagate ST980829A 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 typical)	778k

Track density TPI (tracks/inch typical)	126k

Areal density (Mbits/inch2 max)	98.2
Spindle speed (RPM) (± 0.2%)	4,200 RPM-class performance (actual spin speed: 5,400 RPM)

Internal data-transfer rate OD (Mbytes/sec max)	37

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

Interleave	1:1

Cache buffer	8 Mbytes (8,184 kbytes)

2.6Physical characteristics

Height	(mm)	9.5 +/-0.2
	(inches)	0.374	+/-0.008

Width	(mm)	69.85	+/-0.25
	(inches)	2.750	+/-0.010

Length	(mm)	100.2	+/-0.25
	(inches)	3.945	+/-0.010

Typical weight	(grams)	100
	(pounds)	0.22

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	12.5	14.5

Full-stroke	22.0	24.0

Average latency	5.56	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 or exceed 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 speci- fications.

8	Momentus 4200.2 Product Manual, Rev. C

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Contents Momentus Page Contents Momentus 4200.2 Product Manual, Rev. C List of Figures Momentus 4200.2 Product Manual, Rev. C Introduction Momentus 4200.2 Pata disc driveMomentus 4200.2 Product Manual, Rev. C Specifications for 120, 100, and 80 GB models Drive specificationsSpecification summary Drive specification ST9120824A ST9100825A ST980829AFollowing web Warranty Specifications for 60, 50, 40, and 30 GB models Drive specification ST960812A ST950814A ST9402112A ST930218ASpecifications for 60, 50, 40, and 30 GB models Formatted capacity Default logical geometryLBA mode Physical organizationRecording and interface technology Physical characteristicsTechnology Specification Seek timePower specifications Time to readyVoltage tolerance Typical current profileConducted noise Active mode Power-management modesPower management modes Idle modeEnvironmental specifications Nonoperating shock ShockOperating shock VibrationDrive level acoustics AcousticsElectromagnetic immunity Electromagnetic immunityReliability Safety certificationMeasurement type Specification Agency certificationFCC verification Korean RRLAustralian C-Tick N176 European Union Restriction of Hazardous Substances RoHS Environmental protectionCorrosive environment Momentus 4200.2 Product Manual, Rev. C Configuring and mounting the drive Handling and static discharge precautionsCable-select option Jumper settingsMaster/slave configuration Mounting dimensions-top, side and end view Drive mountingMomentus 4200.2 Product Manual, Rev. C Connector Cable Signal Name Contact Conductor ATA interface signals and connector pinsConnector signals Cable Connector Conductor Contact Signal NameCommand name Command code in hex ATA-standard commands Supported ATA commandsSupported commands ATA-standard security commands Command name Command code in hexATA-standard power-management commands Identify Device command Word Description ValueXxxxH Description if bit is set to Bit Word Bit WordSet Features command Features register valuesMomentus 4200.2 Product Manual, Rev. C Installation considerations Compatibility summarySystem Compatibility Tested systemsVendor Release Revision Bios versions testedTested Bios versions Software utilities Compatibility test configurationsOperating system versions tested Other certificationPresales Support Seagate Technology support servicesInternet Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index Page Page Momentus 4200.2 Product Manual, Rev. C Page Seagate Technology LLC