Seagate ST3400755FC Performance characteristics, Internal drive characteristics, Seek performance

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4.0Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Cheetah NS FC drives.

4.1Internal drive characteristics

	ST3400755FC	ST3300955FC
Drive capacity*	400.0	300	Gbytes (formatted, rounded off value)
Read/write data heads	8	4
Tracks per surface (total)	92,200	92,200	Tracks (user accessible)
Tracks per inch	155,000	155,000	TPI
Peak bits per inch	979k	979k	BPI
Areal density	151.7	151.7	Gbits/inch2
Internal data rate	725 to 1,211	725 to 1,211	Mbits/sec (variable with zone)
Disc rotation speed	10k	10k	rpm
Avg rotational latency	2.98	2.98	msec

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.

4.2Seek performance

See Section 9.5, "FC-AL physical interface" on page 61 and the Fibre Channel Interface Manual (part number 77767496) for additional timing details.

4.2.1Access time

Not including controller overhead1,2(msec)

		Read	Write
Average	Typical	3.9	4.2
Single track	Typical	0.35	0.52
Full stroke	Typical	6.8	7.5

1.Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives.

2.Access to data = access time + latency time.

Cheetah NS FC Product Manual, Rev. B

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Contents ST3400755FC ST3300955FC Cheetah NS FCPage Cheetah NS FC Product Manual, Rev. B Cheetah NS FC Product Manual, Rev. B Contents Defect and error management InstallationInterface requirements Seagate Technology support services Cheetah NS FC Product Manual, Rev. B List of Figures Page Scope Cheetah NS FC Product Manual, Rev. B Standards Standards, compliance and reference documentsElectromagnetic compatibility Electromagnetic susceptibilityCompliance Ncits TR-19 Reference documentsCheetah NS FC Product Manual, Rev. B General description Media description Standard featuresReliability PerformanceFormatted capacities Programmable drive capacityUser-installed accessories Factory-installed optionsInternal drive characteristics Performance characteristicsAccess time Seek performanceFormat command execution time minutes General performance characteristicsStart/stop time Prefetch/multi-segmented cache control Cache operationCaching write data Prefetch operation Error rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsSeek errors Reliability and serviceInterface errors Preventive maintenanceControlling S.M.A.R.T 4 S.M.A.R.TPerformance impact MillisecondsDetermining rate Reporting controlPredictive failures Thermal monitorParameter Code Description State of the drive prior to testingDrive Self Test DST DST failure definitionShort and extended tests Invoking DSTShort test Function Code 001b Extended test Function Code 010bAbort Product warrantyShipping Product repair and return informationCheetah NS FC Product Manual, Rev. B AC power requirements Physical/electrical specificationsDC power requirements DC power requirements for ST3400755FC model Gbit AmpsDC power requirements for ST3300955FC model Gbit Amps General DC power requirement notesConducted noise immunity Power sequencingCurrent profiles Cheetah NS FC Product Manual, Rev. B ST3400755 CURRENT/POWER vs Throughput FC 4GB Power dissipationST3400755FC Random 8 Block ReadsST3300955FC ST3300955 CURRENT/POWER vs Throughput FC 4GBTemperature Environmental limitsRelative humidity Effective altitude sea level Package size Packaged/product weight Drop heightShock and vibration ShockRecommended mounting Vibration Air cleanlinessAcoustics Corrosive environmentChina Restriction of Hazardous Substances RoHS Directive X表示该部件（于同类物品程度上）所含的危险和有毒物质中国RoHS MCV标准所定义的门槛值。Mounting configuration dimensions Mechanical specificationsCheetah NS FC Product Manual, Rev. B Defect and error management Drive internal defects/errorsDrive error recovery procedures 77.87 FC-AL system errors Background Media ScanMedia Pre-Scan Idle Read After Write Deferred Auto-ReallocationDrive ID/option selection InstallationDrive orientation CoolingAir flow Drive mountingGrounding Cheetah NS FC Product Manual, Rev. B Fibre Channel link service frames FC-AL featuresLink services supported Type of frame Interface requirementsFibre Channel task management functions Fibre Channel task management responsesFC Scsi FCP response codes Function name Response code NPort login Plogi payload Bytes Fibre Channel port loginFibre Channel Process Login Fibre Channel port login acceptNPort Login Accept ACC payload Bytes Process Login Plri payloadFibre Channel fabric login Fibre Channel Process Login AcceptProcess Login Accept ACC payload Bytes Fabric Login Flogi payload BytesFabric Login Accept ACC payload Bytes Fibre Channel fabric accept loginFibre Channel Arbitrated Loop options Dual port supportFC-AL options supported Option SupportedSupported commands Command code Command name Scsi commands supportedVerify error recovery page 07h Cheetah NS FC Product Manual, Rev. B Temperature page 0Dh Mode Sense data Inquiry dataCheetah NS FC inquiry data Bytes Data hex Page Mode Sense 10 Byte Header Data Mode Data Header Miscellaneous features Miscellaneous operating features and conditionsSupported Feature or condition Miscellaneous statusPhysical characteristics FC-AL physical interfacePhysical description Connector requirements Electrical descriptionPin descriptions FC-SCA pin descriptions Pin Signal name Signal type Pin Signal name Signal typeFC-AL transmitters and receivers Fault LED Out PowerEnable port bypass signals Active LED OutMotor start controls 11 SEL6 through SEL0 ID lines Parallel Enclosure Services Interface ESISetting Arbitrated loop physical address Alpa valuesHex Dec Signal characteristics TTL input characteristicsDevice control codes LED driver signals FC Differential outputFC Differential input Receive eye diagram Eye diagram data values Link rate GHz Internet Seagate Technology support servicesPresales Support Technical SupportWarranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Numerics IndexFAN Flogi Plogi SEL ID See also cooling

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