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Seagate ST973451SS ST936751SS in 3 Gbit operation, ST936751SS in 1.5 Gbit operation, Vo lt A

Models: ST936751SS ST973451SS

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ST936751SS in 3 Gbit operation

ST936751SS in 3 Gbit operation

Typical power dissipation under idle conditions in 3Gb operation is 5.62 watts (19.18 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.

CURRENT/POWER vs THROUGHPUT (SAS - 3.0GB)

Random 8 Block Reads

	1.400									14.00	5Vo lt A
											5Vo lt A
											12 Vo lt A
	1.200									12.00	Watts
											Watts
	1.000									10.00	Power (watts)
Amperes	0.800									8.00
	0.600									6.00

	0.400									4.00
	0.200									2.00
	0.000									0.00
	0.0	50.0	100.0	150.0	200.0	250.0	300.0	350.0	400.0	450.0

I/Os per Second

Figure 5. ST936751SS (3 Gbit) DC current and power vs. input/output operations per second

ST936751SS in 1.5 Gbit operation

Typical power dissipation under idle conditions in 1.5 Gbit operation is 5.77 watts (19.69 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.

CURRENT/POWER vs THROUGHPUT (SAS - 1.5GB)

Random 8 Block Reads

	1.400									14.00	5Volt A
											5Volt A
											12 Volt A
	1.200									12.00	Watts
											Watts
	1.000									10.00	Power (watts)
Amperes	0.800									8.00
	0.600									6.00

	0.400									4.00
	0.200									2.00
	0.000									0.00
	0.0	50.0	100.0	150.0	200.0	250.0	300.0	350.0	400.0	450.0

I/Os per Second

Figure 6. ST936751SS (1.5 Gbit) DC current and power vs. input/output operations per second

28	Savvio 15K SAS Product Manual, Rev. B

Image 36

Seagate ST973451SS manual ST936751SS in 3 Gbit operation, ST936751SS in 1.5 Gbit operation, Vo lt A

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 3.1 Standard features 3.2 Media description3.3 Performance 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 data4.2.2 Format command execution time General performance characteristics4.2.3 4.3 Start/stop time 4.4 Prefetch/multi-segmented cache control4.5 Cache operation 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 profile6.3 Power dissipation ST973451SS in 3 Gbit operationST973451SS in 1.5 Gbit operation ST936751SS in 3 Gbit operation ST936751SS in 1.5 Gbit operation12 Vo lt A 6.4 Environmental limits 6.4.1 Temperature6.4.2 Relative humidity 6.4.3 Effective altitude sea level 6.4.4 Shock and vibration6.4.4.1 Shock Packaged/product weight Package sizeDrop height Figure 8. Recommended mounting6.4.5 Air cleanliness 6.4.4.2 Vibration6.4.6 Corrosive environment 6.4.7 Acoustics 6.4.8 Electromagnetic susceptibility6.5 Mechanical specifications Figure 9. Mounting configuration dimensions7.0 Defect and error management 7.1 Drive internal defects/errors7.2 Drive error recovery procedures 7.3 SAS system errors Table 4 Read and write retry count maximum recovery timesMaximum recovery time per Maximum recovery time per7.4 Background Media Scan 7.5 Media Pre-Scan7.6 Deferred Auto-Reallocation 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 9.4 Miscellaneous operating features and conditions Miscellaneous featuresMiscellaneous status 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 of9.5.2.4.1 Transmitter characteristics Table 21 Impedance requirements Sheet 2 of9.5.2.4 Electrical TxRx connections = -5, 437dB = -10, 884dBTx+ TCTF Tx Figure 20. Zero-length test load Figure 21. ISI loss example at 3.0 GbpsFigure 22. ISI loss example at 1.5 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 Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USAPublication Number 100407739, Rev. B, Printed in USA