Seagate ST9600104SS Performance characteristics, Internal drive characteristics, Access time

Page 17

4.0Performance characteristics

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

4.1Internal drive characteristics

	ST9600204SS	ST9450404SS
	ST9600104SS	ST9450304SS
Drive capacity	600	450	GB (formatted, rounded off value)
Read/write data heads	6	5
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

4.2Seek performance characteristics

See Section 10.4.1, "SAS physical interface" on page 59 and the SAS Interface Manual (part number 100293071) for additional timing details.

4.2.1Access 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.

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

9

Image 17

Contents Standard Models Self-Encrypting Drive Models ST9600204SSST9600104SS ST9450404SSST9450304SSRev. a 12/15/09 Initial release Revision historyContents Installation Defect and error managementAbout self-encrypting drives Interface requirementsSeagate Technology support services Savvio 10K.4 SAS Product Manual, Rev. a List of Figures Page Scope Standards Applicable standards and reference documentationElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance for the European Union Electromagnetic complianceAustralian C-Tick Korean KCCEuropean Union Restriction of Hazardous Substances RoHS Reference documentsGeneral description Media description Standard featuresReliability PerformanceFormatted capacities Programmable drive capacityFactory-installed options Internal drive characteristics Performance characteristicsSeek performance characteristics Access timeStart/stop time General performance characteristicsCaching write data Prefetch/multi-segmented cache controlCache operation Prefetch operation Error rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsSeek errors Reliability and serviceInterface errors Preventive maintenance4 S.M.A.R.T Maximum processing delay Fully-enabled delayControlling S.M.A.R.T Performance impactThermal monitor Temperature Log Page 0Dh Parameter Code DescriptionPredictive failures Drive Self Test DST State of the drive prior to testingDST failure definition ImplementationShort test Function Code 001b Short and extended testsExtended test Function Code 010b Log page entriesProduct repair and return information Product warrantyShipping PowerChoice modes Physical/electrical specificationsPowerChoiceTM power management DC power requirements AC power requirementsSavvio 10K.4 SAS Product Manual, Rev. a Page Page Conducted noise immunity General DC power requirement notesPower sequencing Current profiles for 600GB models Current profilesCurrent profiles for 450GB models GB models in 3Gb operation Power dissipation600GB models in 6Gb operation 450GB models in 3Gb operation 450GB models in 6Gb operation Temperature a. OperatingEnvironmental limits Shock and vibration Relative humidityEffective altitude sea level a. Operating Shock Recommended mounting Corrosive environment Air cleanlinessVibration a. Operating-normal Acoustics Mounting configuration dimensions Mechanical specificationsAdmin SP Controlled accessAbout self-encrypting drives Data encryptionRandom number generator RNG Default passwordDrive locking Data bandsPower requirements Authenticated firmware downloadSupported commands Cryptographic eraseDrive error recovery procedures Defect and error managementDrive internal defects/errors SAS system errors Deferred Auto-Reallocation Background Media ScanMedia Pre-Scan Idle Read After Write Drive orientation InstallationAir flow CoolingGrounding Drive mountingInterface requirements SAS featuresDual port support Supported commands Scsi commands supportedSupported commands Supported commands Supported commands Savvio inquiry data Mode Sense dataInquiry data Page Mode Pages Mode Sense data for ST9600204SS and ST9600104SS drivesMode Sense values for ST9450404SS and ST9450304SS drives Miscellaneous status Miscellaneous operating features and conditionsMiscellaneous features SAS physical interface Datum B Section C C Section a a Connector requirements Physical characteristicsElectrical description Pin descriptionsPower Signal characteristicsSAS transmitters and receivers Ready LED OutLED drive signal SAS-2 Specification complianceDifferential signals General interface characteristicsInternet Seagate Technology support servicesPresales Support Technical SupportData Recovery Services Call Center Toll-free Direct dialFAX Warranty ServiceData Recovery Services Authorized Service Centers Numerics IndexKCC Msid Mtbf See also cooling Page Savvio 10K.4 SAS Product Manual, Rev. a Page Seagate Technology LLC

Related manuals

Manual 82 pages 44.39 Kb