Seagate ST31000640FC Performance characteristics, Internal drive characteristics, Access time

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4.0Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Bar- racuda ES.2 FC drives.

4.1Internal drive characteristics

	ST31000640FC
Drive capacity*	1,000	Gbytes (formatted, rounded off value)
Read/write data heads	8
Tracks per inch	150,000	TPI
Peak bits per inch	1,090k	BPI
Areal density	164	Gbits/inch2
Internal data rate	1,287	Mbits/sec (variable with zone)
Disc rotation speed	7,200	rpm
Avg rotational latency	4.16	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 56 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	7.4	8.5
Single track	Typical	0.4	1.0
Full stroke	Typical	14.3	15.4

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.

4.2.2Format command execution time (minutes)

	ST31000640FC
Maximum (with verify)	400
Maximum (without verify)	200

Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator (excluding connect/disconnect).

Barracuda ES.2 FC Product Manual, Rev. B

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Contents ST31000640FC Barracuda ES.2 FCPage Barracuda ES.2 FC Product Manual, Rev. B Barracuda ES.2 FC Product Manual, Rev. B Contents Interface requirements Physical/electrical specificationsDefect and error management InstallationSeagate Technology support services Barracuda ES.2 FC Product Manual, Rev. B Scope Barracuda ES.2 FC Product Manual, Rev. B Electromagnetic susceptibility Standards, compliance and reference documentsStandards Electromagnetic compatibilityCompliance Ncits TR-19 Reference documentsBarracuda ES.2 FC Product Manual, Rev. B General description Media description Standard featuresProgrammable drive capacity PerformanceReliability Formatted capacitiesUser-installed accessories Factory-installed optionsFormat command execution time minutes Performance characteristicsInternal drive characteristics Access timeStart/stop time General performance characteristicsPrefetch/multi-segmented cache control Caching write data Cache operationPrefetch operation Unrecoverable Errors Reliability specificationsError rates Recoverable ErrorsPreventive maintenance Reliability and serviceSeek errors Interface errorsMilliseconds 4 S.M.A.R.TControlling S.M.A.R.T Performance impactThermal monitor Reporting controlDetermining rate Predictive failuresDST failure definition State of the drive prior to testingParameter Code Description Drive Self Test DSTExtended test Function Code 010b Invoking DSTShort and extended tests Short test Function Code 001bProduct repair and return information Product warrantyAbort ShippingBarracuda ES.2 FC Product Manual, Rev. B DC power requirements Gbit Amps Physical/electrical specificationsAC power requirements DC power requirementsPower sequencing General DC power requirement notesConducted noise immunity Current profiles Power dissipation Environmental limits TemperatureRelative humidity Shock Package size Packaged/product weight Drop heightEffective altitude sea level Shock and vibrationCorrosive environment Air cleanlinessVibration AcousticsChina 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 specificationsBarracuda ES.2 FC Product Manual, Rev. B Drive internal defects/errors Defect and error managementDrive error recovery procedures 51.87 Background Media Scan FC-AL system errorsMedia Pre-Scan Idle Read After Write Deferred Auto-ReallocationCooling InstallationDrive ID/option selection Drive orientationAir flow Drive mountingGrounding Barracuda ES.2 FC Product Manual, Rev. B Interface requirements FC-AL featuresFibre Channel link service frames Link services supported Type of frameFibre Channel task management responses Fibre Channel task management functionsFC Scsi FCP response codes Function name Response code NPort login Plogi payload Bytes Fibre Channel port loginProcess Login Plri payload Fibre Channel port login acceptFibre Channel Process Login NPort Login Accept ACC payload BytesFabric Login Flogi payload Bytes Fibre Channel Process Login AcceptFibre Channel fabric login Process Login Accept ACC payload BytesFabric Login Accept ACC payload Bytes Fibre Channel fabric accept loginOption Supported Dual port supportFibre Channel Arbitrated Loop options FC-AL options supportedSupported commands Command code Command name Scsi commands supportedVerify error recovery page 07h Barracuda ES.2 FC Product Manual, Rev. B Temperature page 0Dh Inquiry data Mode Sense dataBarracuda ES.2 FC inquiry data Bytes Data hex Page Block Descriptor Mode Sense Pages Data Miscellaneous status Miscellaneous operating features and conditionsMiscellaneous features Supported Feature or conditionFC-AL physical interface Physical characteristicsPhysical description Electrical description Connector requirementsPin descriptions Pin Signal name Signal type FC-SCA pin descriptions Pin Signal name Signal typeFC-AL transmitters and receivers Fault LED Out PowerActive LED Out Enable port bypass signalsMotor start controls 11 SEL6 through SEL0 ID lines Parallel Enclosure Services Interface ESIArbitrated loop physical address Alpa values SettingHex Dec TTL input characteristics Signal characteristicsDevice control codes FC Differential output LED driver signalsFC Differential input Receive eye diagram Eye diagram data values Link rate GHz Barracuda ES.2 FC Product Manual, Rev. B Technical Support Seagate Technology support servicesInternet Presales SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Numerics IndexFAN Flogi Plogi SEL ID See also cooling