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Seagate ST973451SS Format command execution time, 4.2.3, General performance characteristics

Models: ST936751SS ST973451SS

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4.2.2Format command execution time

	ST973451SS	ST936751SS
Maximum (with verify)	52 minutes	26 minutes
Maximum (without verify)	35 minutes	18 minutes

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).

4.2.3	General performance characteristics
Sustained trasfer rate		79 to 112 Mbytes/sec
SAS Interface maximum instantaneous transfer rate		300 Mbytes/sec* per port
		(dual port = 600 Mbytes/sec*)
Logical block sizes
	512 (default), 520, 524 and 528
Read/write consecutive sectors on a track		Yes
Flaw reallocation performance impact (for flaws reallocated at format time using the		Negligible
spare sectors per sparing zone reallocation scheme.)
Average rotational latency		2.0 msec

*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.

12	Savvio 15K SAS Product Manual, Rev. B

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Seagate ST973451SS, ST936751SS manual Format command execution time, 4.2.3, General performance characteristics

Contents

Savvio 15K SAS PRODUCT MANUALST973451SS ST936751SS 100407739 Rev. BMarch Revision status summary sheet Rev. A09/15/06 Initial releaseSavvio 15K SAS Product Manual, Rev. B Contents 4.0 Performance characteristics5.0 Reliability specifications 6.0 Physical/electrical specifications7.0 Defect and error management 8.0 Installation10.0 Seagate Technology support services 9.0 Interface requirementsList of Figures Page 1.0 Scope Savvio 15K SAS Product Manual, Rev. B 2.0 Applicable standards and reference documentation 2.1 Standards2.1.1 Electromagnetic compatibility 2.1.1.1 Electromagnetic susceptibility2.1.2 Electromagnetic compliance Electromagnetic compliance for the European UnionAustralian C-Tick Korean MIC2.2 Reference documents SCSI Commands Reference Manual SAS Interface ManualSpecification for Acoustic Test Requirement and Procedures 2.1.3 European Union Restriction of Hazardous Substances RoHSSavvio 15K SAS Product Manual, Rev. B 3.0 General description 3.3 Performance 3.1 Standard features3.2 Media description 3.7 Factory-installed accessories 3.4 Reliability3.5 Formatted capacities 3.6 Programmable drive capacity3.8 Options 4.0 Performance characteristics 4.1 Internal drive characteristics4.2 Seek performance characteristics 4.2.1 Access time Gen 2.0 LP data4.2.3 4.2.2 Format command execution timeGeneral performance characteristics 4.5 Cache operation 4.3 Start/stop time4.4 Prefetch/multi-segmented cache control 4.5.1 Caching write data 4.5.2 Prefetch operation5.0 Reliability specifications 5.1 Error rates5.1.1 Recoverable Errors 5.1.2 Unrecoverable Errors5.2 Reliability and service 5.1.3 Seek errors5.1.4 Interface errors 5.2.2 Preventive maintenanceMaximum processing delay On-line only delayFully-enabled delay 5.2.4 S.M.A.R.TTemperature Log Page 0Dh Predictive failures5.2.5 Thermal monitor Parameter Code5.2.6.2.1 State of the drive prior to testing 5.2.6.1 DST failure definition5.2.6.2 Implementation 5.2.6.2.2 Invoking DST5.2.7 Product warranty Short test Function Code 001bExtended test Function Code 010b 5.2.6.2.4 Log page entriesShipping Product repair and return informationSavvio 15K SAS Product Manual, Rev. B 6.0 Physical/electrical specifications 6.1 AC power requirements6.2 DC power requirements Table 2 ST973451SS DC power requirementsST936751SS DC power requirements General DC power requirement notes6.2.2 Power sequencing 6.2.1 Conducted noise immunity6.2.3 Current profiles Figure 1. Typical ST973451SS current profileSavvio 15K SAS Product Manual, Rev. B Figure 2. Typical ST936751SS current profileST973451SS in 1.5 Gbit operation 6.3 Power dissipationST973451SS in 3 Gbit operation 12 Vo lt A ST936751SS in 3 Gbit operationST936751SS in 1.5 Gbit operation 6.4.2 Relative humidity 6.4 Environmental limits6.4.1 Temperature 6.4.4.1 Shock 6.4.3 Effective altitude sea level6.4.4 Shock and vibration Packaged/product weight Package sizeDrop height Figure 8. Recommended mounting6.4.6 Corrosive environment 6.4.5 Air cleanliness6.4.4.2 Vibration 6.4.7 Acoustics 6.4.8 Electromagnetic susceptibility6.5 Mechanical specifications Figure 9. Mounting configuration dimensions7.2 Drive error recovery procedures 7.0 Defect and error management7.1 Drive internal defects/errors 7.3 SAS system errors Table 4 Read and write retry count maximum recovery timesMaximum recovery time per Maximum recovery time per7.6 Deferred Auto-Reallocation 7.4 Background Media Scan7.5 Media Pre-Scan 7.7 Idle Read After Write 8.0 Installation 8.1 Drive orientation8.2 Cooling Figure 11. Air flow8.3 Drive mounting 8.4 GroundingSavvio 15K SAS Product Manual, Rev. B 9.1 SAS features 9.0 Interface requirements9.1.1 task management functions SAS task management functions supported9.2 Dual port support 9.3 SCSI commands supported Commands supported by Savvio SAS family driveCommands supported by Savvio SAS family drive continued Commands supported by Savvio SAS family drive continued Commands supported by Savvio SAS family drive continued 9.3.2 Mode Sense data 9.3.1 Inquiry dataSavvio inquiry data BytesCHG = Changeable bits indicates if default value is changeable 3. Current values4. Changeable values Savvio 15K SAS Product Manual, Rev. BMODE DATA HEADER 03 fa 00 10 00 00 00 BLOCK DESCRIPTOR Savvio 15K SAS Product Manual, Rev. B Miscellaneous status 9.4 Miscellaneous operating features and conditionsMiscellaneous features 9.4.1 SAS physical interface Figure 12. Physical interfaceFigure 13. SAS device plug dimensions C OF DATUM B LFigure 14. SAS device plug dimensions detail TO DATUM A9.4.2 Physical characteristics 9.4.3 Connector requirements9.4.4 Electrical description 9.4.5 Pin descriptionsTable 13 SAS pin descriptions 9.4.6 SAS transmitters and receiversTX Transmitter 100 TY Differential Transfer Medium9.5 Signal characteristics 9.4.7 PowerLED drive signal 9.5.2 Differential signalsTable 16 General interface characteristics Characteristic9.5.2.1 Eye masks 9.5.2.1.1 Eye masks overview 9.5.2.1.2 Receive eye mask9.5.2.1.3 Jitter tolerance masks Figure 17. Reveive tolerance eye mask9.5.2.2 Transmitter signal characteristics Table 17 Transmitter signal characteristicsPeak-to sinusoidalTable 17 Transmitter signal characteristics 9.5.2.3 Receiver signal characteristicsTable 18 Receiver signal characteristics a All tests in this table shall be performed with zero-length test load shown in figure9.5.2.3.1 Jitter Table 19 Maximum allowable jitter9.5.2.3.2 Receiver jitter tolerance 9.5.2.3.3 Compliant jitter test pattern CJTPAT9.5.2.3.4 Impedance specifications Table 21 Impedance requirements Sheet 1 of9.5.2.4 Electrical TxRx connections 9.5.2.4.1 Transmitter characteristicsTable 21 Impedance requirements Sheet 2 of Tx+ TCTF Tx = -5, 437dB= -10, 884dB Figure 22. ISI loss example at 1.5 Gbps Figure 20. Zero-length test loadFigure 21. ISI loss example at 3.0 Gbps 9.5.2.5 Receiver characteristics Savvio 15K SAS Product Manual, Rev. B 10.0 Seagate Technology support services Seagate Service CentersInternet Presales SupportCustomer Service Operations USA/Canada/Latin America support servicesEurope, the Middle East and Africa Support Services Asia/Pacific Support ServicesNumerics IndexPage Page See also cooling Page Publication Number 100407739, Rev. B, Printed in USA Seagate Technology LLC920 Disc Drive, Scotts Valley, California 95066-4544, USA