Seagate ST9600204SS Performance characteristics, Internal drive characteristics, Access time

Page 18

5.0Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Sav- vio drives.

5.1Internal drive characteristics

	ST9600204SS	ST9450404SS
	ST9600104SS	ST9450304SS
	ST9600004SS	ST9450204SS
Drive capacity	600	450	GB (formatted, rounded off value)
Read/write data heads	6	6
Bytes per track	677,557	677,557	Bytes (average, rounded off values)
Bytes per surface	100,021	75,016	MB (unformatted, rounded off value)
Tracks per surface (total)	147,620	110,715	Tracks (user accessible)
Tracks per inch	240,000	180,000	TPI (average)
Peak bits per inch	1,430	1,430	kBPI
Areal density	343	257.4	Gb/in2
Internal data rate	1.62	1.62	Gb/s (variable with zone)
Disc rotation speed	10K	10K	rpm
Avg rotational latency	3.0	3.0	ms

5.2Seek performance characteristics

See Section 12.4.1, "SAS physical interface" on page 61 and the SAS Interface Manual (part number 100293071) for additional timing details.

5.2.1Access time

			Including controller overhead1,2 (ms)		Not including controller overhead1,2 (ms)
			Read	Write	Read	Write

	Average	600GB	4.0	4.6	3.8	4.4
	Single track	600GB	0.50	0.76	0.30	0.56
	Single track	Typical3,4	0.50	0.76	0.30	0.56
	Full stroke		8.01	8.38	7.81	8.18
	Average	450GB	4.0	4.6	3.8	4.4
	Single track	450GB	0.50	0.76	0.30	0.56
	Single track	Typical3,4	0.50	0.76	0.30	0.56
	Full stroke		7.96	8.51	7.76	8.31

1.Execution time measured from receipt of the Command to the Response.

2.Assumes no errors and no sector has been relocated.

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

4.Access time = controller overhead + average seek time and applies to all data transfer commands. Access to data = access time + latency time.

10	Savvio 10K.4 SAS Product Manual, Rev. E

Image 18

Contents Standard Models Self-Encrypting Drive Models ST9600204SSST9600104SS ST9450404SSST9450304SSST9600004SS ST9450204SS SED Fips 140-2 ModelsRevision history Contents About Fips About self-encrypting drives Defect and error managementInstallation Interface requirementsPage Savvio 10K.4 SAS Product Manual, Rev. E List of Figures Page Seagate Technology support services Seagate Online Support and ServicesScope Electromagnetic compatibility Applicable standards and reference documentationStandards Electromagnetic susceptibilityAustralian C-Tick Electromagnetic complianceElectromagnetic compliance for the European Union Korean KCCReference documents European Union Restriction of Hazardous Substances RoHSGeneral description Standard features Media descriptionFormatted capacities PerformanceReliability Programmable drive capacityFactory-installed options Seek performance characteristics Performance characteristicsInternal drive characteristics Access timeGeneral performance characteristics Start/stop timePrefetch/multi-segmented cache control Cache operationCaching write data Prefetch operation Recoverable Errors Reliability specificationsError rates Unrecoverable ErrorsInterface errors Reliability and serviceSeek errors Preventive maintenancePerformance impact 4 S.M.A.R.TControlling S.M.A.R.T Reporting controlTemperature Log Page 0Dh Parameter Code Description Predictive failuresThermal monitor DST failure definition State of the drive prior to testingDrive Self Test DST ImplementationExtended test Function Code 010b Short and extended testsShort test Function Code 001b Log page entriesProduct warranty ShippingProduct repair and return information Physical/electrical specifications PowerChoiceTM power managementPowerChoice modes AC power requirements DC power requirementsPage 450GB standard model DC power requirements 0Gb mode Amps General DC power requirement notes Power sequencingConducted noise immunity Current profiles Current profiles for 600GB modelsCurrent profiles for 450GB models Power dissipation GB models in 3Gb operation600GB models in 6Gb operation 450GB models in 3Gb operation Temperature a. Operating Environmental limits450GB models in 6Gb operation Relative humidity Effective altitude sea level a. OperatingShock and vibration Shock Recommended mounting Air cleanliness Vibration a. Operating-normalCorrosive environment Acoustics Mechanical specifications Mounting configuration dimensionsAbout Fips PurposeLevel 2 security About self-encrypting drives Controlled accessAdmin SP Data encryptionDrive locking Default passwordRandom number generator RNG Data bandsSupported commands Authenticated firmware downloadPower requirements Cryptographic eraseDefect and error management Drive internal defects/errorsDrive error recovery procedures SAS system errors Background Media Scan Media Pre-ScanDeferred Auto-Reallocation Protection Information PI Setting and determining the current Type LevelIdle Read After Write Levels of PIIdentifying a Protection Information drive Installation Drive orientationCooling Air flowDrive mounting GroundingSAS features Interface requirementsDual port support Scsi commands supported Supported commandsSupported commands Supported commands Supported commands Mode Sense data Inquiry dataSavvio inquiry data Page Mode Sense data for 600GB drives Mode PagesMode Sense values for 450GB drives Miscellaneous operating features and conditions Miscellaneous featuresMiscellaneous status SAS physical interface Datum B Section C C Section a a Electrical description Physical characteristicsConnector requirements Pin descriptionsSAS transmitters and receivers Signal characteristicsPower Ready LED OutDifferential signals SAS-2 Specification complianceLED drive signal General interface characteristicsIndex NumericsKCC Msid Mtbf See also cooling Page Savvio 10K.4 SAS Product Manual, Rev. E Page Seagate Technology LLC

Related manuals

Manual 82 pages 32.11 Kb