Seagate ST973451SS manual ST936751SS DC power requirements, General DC power requirement notes

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Table 3:	ST936751SS DC power requirements

								ST936751SS			ST936751SS
								1.5 Gbit mode			3.0 Gbit mode

							Notes	(Amps)		(Amps)	(Amps)		(Amps)

Voltage								+5V		+12V [2]	+5V		+12V [2]

Regulation							[5]	±5%		±5% [2]	±5%		±5% [2]

							[1] [6]	0.77		0.16	0.74		0.16
Avg idle current DCX							[1] [6]	0.77		0.16	0.74		0.16
Maximum starting current
Maximum starting current
(peak DC) DC						3σ	[3]	0.85		1.33	0.81		1.28
(peak AC) AC						3σ	[3]	1.27		1.87	1.11		1.87
						3σ
Delayed motor start (max) DC						3σ	[1] [4]	0.63		0.03	0.67		0.03
Operating current:
Operating current:
							[1]	0.75		0.34	0.78		0.34
Typical DCX							[1]	0.75		0.34	0.78		0.34
Maximum DC						3σ	[1]	0.78		0.38	0.81		0.37
Maximum (peak) DC						3σ		1.46		1.14	1.52		1.16

[1]Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val- ues. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.

[2]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 9,936 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator.

[3]See +12V current profile in Figure 1.

[4]This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive.

[5]See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response.

[6]During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track.

General DC power requirement notes.

1.Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current shown.

2.The +5V and +12V supplies should employ separate ground returns.

3.Where power is provided to multiple drives from a common supply, careful consideration for individual drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak starting current must be available to each device.

4.Parameters, other than spindle start, are measured after a 10-minute warm up.

5.No terminator power.

24	Savvio 15K SAS Product Manual, Rev. B

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Contents Savvio 15K SAS 100407739 Rev. BPage Revision status summary sheet Savvio 15K SAS Product Manual, Rev. B Contents Defect and error management InstallationSeagate Technology support services Interface requirementsList of Figures Page Scope Savvio 15K SAS Product Manual, Rev. B Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance Electromagnetic compliance for the European UnionAustralian C-Tick Korean MICReference documents European Union Restriction of Hazardous Substances RoHSSavvio 15K SAS Product Manual, Rev. B General description Performance Standard featuresMedia description Factory-installed accessories ReliabilityFormatted capacities Programmable drive capacityOptions Performance characteristics Internal drive characteristicsSeek performance characteristics Access time Gen 2.0 LP dataFormat command execution time General performance characteristicsCache operation Start/stop timePrefetch/multi-segmented cache control Caching write data Prefetch operationReliability specifications Error ratesRecoverable Errors Unrecoverable ErrorsReliability and service Seek errorsInterface errors Preventive maintenance4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact Reporting controlTemperature Log Page 0Dh Predictive failuresThermal monitor Parameter Code DescriptionState of the drive prior to testing DST failure definitionImplementation Invoking DSTProduct warranty Short test Function Code 001bExtended test Function Code 010b Log page entriesShipping Product repair and return informationSavvio 15K SAS Product Manual, Rev. B Physical/electrical specifications AC power requirementsDC power requirements ST973451SS DC power requirementsST936751SS DC power requirements General DC power requirement notesCurrent profiles Power sequencingConducted noise immunity Typical ST936751SS current profile ST973451SS in 1.5 Gbit operation Power dissipationST973451SS in 3 Gbit operation ST936751SS in 3 Gbit operation ST936751SS in 1.5 Gbit operationRelative humidity TemperatureEnvironmental limits Shock Effective altitude sea levelShock and vibration Recommended mounting Corrosive environment Air cleanlinessVibration Acoustics Mechanical specifications Mounting configuration dimensionsDrive 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 Installation Drive orientationCooling Air flowDrive mounting GroundingSavvio 15K SAS Product Manual, Rev. B SAS features Interface requirementsDual port support Scsi commands supported Commands supported by Savvio SAS family driveCommands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Savvio inquiry data Mode Sense dataInquiry data Page Mode Data Header 04 45 dc cc 00 00 02 Miscellaneous status Miscellaneous operating features and conditionsMiscellaneous features SAS physical interface Datum B Section C C Section a a Physical characteristics Connector requirementsElectrical description Pin descriptionsSAS pin descriptions SAS transmitters and receiversSignal characteristics Receive eye mask General interface characteristicsEye masks Eye masks overview Jitter tolerance masks Z1 OPTransmitter signal characteristics Peak-toSinusoidal JitterReceiver signal characteristics Compliant jitter test pattern Cjtpat Maximum allowable jitterReceiver jitter tolerance Impedance specifications Impedance requirements Sheet 1Electrical TxRx connections Transmitter characteristicsImpedance requirements Sheet 2 = -5,437dB Shows the zero-length test load Receiver characteristics Savvio 15K SAS Product Manual, Rev. B Seagate Technology support services InternetPresales Support Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index NumericsPage SAS See also cooling