Seagate ST3300555SS manual ST3146755SS in 3 Gbit operation, ST3146755SS in 1.5 Gbit operation

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ST3146755SS in 3 Gbit operation

Typical power dissipation under idle conditions in 3Gb operation is 10.74 watts (36.65 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). 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.

Amperes

1.400

1.200

1.000

0.800

0.600

0.400

0.200

0.000

0.0

	CURRENT/POWER vs THROUGHPUT (SAS - 3.0GB)
		Random 8 Block Reads			14.00
					14.00	5Volt A
						5Volt A
					12.00	12 Volt A
					12.00	Watts
						Watts
					10.00	Power
					8.00	Power
					8.00	(watts)
					6.00	(watts)
					6.00
					4.00
					2.00
					0.00
50.0	100.0	150.0	200.0	250.0	300.0

I/Os per Second

Figure 7. ST3146755SS (3 Gbit) DC current and power vs. input/output operations per second

ST3146755SS in 1.5 Gbit operation

Typical power dissipation under idle conditions in 1.5 Gbit operation is 10.84 watts (36.99 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). 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.

Amperes

1.400

1.200

1.000

0.800

0.600

0.400

0.200

0.000

0.0

	CURRENT/POWER vs THROUGHPUT (SAS - 1.5GB)
		Random 8 Block Reads			14.00
					14.00	5Volt A
						5Volt A
					12.00	12 Volt A
					12.00	Watts
					10.00	Power
					8.00	Power
					8.00	(watts)
					6.00	(watts)
					6.00
					4.00
					2.00
					0.00
50.0	100.0	150.0	200.0	250.0	300.0

I/Os per Second

Figure 8. ST3146755SS (1.5 Gbit) DC current and power vs. input/output operations per second

30	Cheetah T10 SAS Product Manual, Rev. A

Image 36

Contents Cheetah T10 SAS Page Contents Defect and error management InstallationSeagate Technology support services Interface requirementsList of Figures Cheetah T10 SAS Product Manual, Rev. a Scope Cheetah T10 SAS disc driveCheetah T10 SAS Product Manual, Rev. a Standards, compliance and reference documents StandardsElectromagnetic compatibility Electromagnetic susceptibilityCompliance Reference documents Cheetah T10 SAS Product Manual, Rev. a General description Standard features Media descriptionPerformance Factory-installed accessories ReliabilityFormatted capacities Programmable drive capacityOptions factory installed User-installed accessoriesPerformance characteristics Internal drive characteristicsAccess time Seek timeFormat command execution time minutes General performance characteristicsStart/stop time Prefetch/multi-segmented cache control Cache operationCaching write data Prefetch operationReliability specifications Error ratesRecoverable Errors Unrecoverable ErrorsReliability and service Seek errorsInterface errors Preventive maintenanceHot plugging the drive 4 S.M.A.R.TControlling S.M.A.R.T Performance impactReporting control Determining ratePredictive failures Thermal monitorTemperature Log Page 0Dh Primary TemperatureReference Temperature Parameter Code DescriptionState of the drive prior to testing Invoking DSTShort and extended tests Short test Function Code 001bProduct warranty AbortShipping Product repair and return informationCheetah T10 SAS Product Manual, Rev. a Physical/electrical specifications AC power requirementsDC power requirements ST3300555SS DC power requirementsST3146755SS DC power requirements ST373355SS DC power requirementsST3146755SS Gbit mode Amps ST373355SS Gbit mode AmpsGeneral DC power requirement notes Power sequencingConducted noise immunity Current profilesTypical ST3300555SS drive current profiles Typical ST3146755SS drive current profiles Typical ST373355SS drive current profiles Power dissipation ST3300555SS in 3 Gbit operationST3300555SS in 1.5 Gbit operation ST3146755SS in 3 Gbit operation ST3146755SS in 1.5 Gbit operationST373355SS in 3 Gbit operation ST373355SS in 1.5 Gbit operationTemperature a. Operating Environmental limitsRelative humidity Effective altitude sea level a. OperatingShock and vibration ShockPackage size Packaged/product weight Drop height Recommended mountingAir cleanliness Vibration a. Operating-normalCorrosive environment Mechanical specifications AcousticsDefect and error management Drive internal defects/errorsDrive error recovery procedures Write retry count LBA cumulative, msec SAS system errors Background Media ScanMedia Pre-Scan Deferred Auto-Reallocation Idle Read After WriteInstallation Drive orientationCooling Air flowDrive mounting GroundingCheetah T10 SAS Product Manual, Rev. a SAS features Interface requirementsDual port support Scsi commands supported Commands supported by Cheetah T10 SAS family drivesCommand name Command code Supported Commands supported by Cheetah T10 SAS family drives Commands supported by Cheetah T10 SAS family drives Commands supported by Cheetah T10 SAS family drives Mode Sense data Inquiry dataCheetah T10 SAS inquiry data Bytes Data hexPage ST3300555SS Mode Sense data Mode PagesST3146755SS Mode Sense data ST373355SS Mode Sense data Miscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusSAS physical interface Datum B Physical characteristics Connector requirementsPin Signal name Signal type Electrical descriptionPin descriptions SAS pin descriptionsSignal characteristics PowerSAS transmitters and receivers Ready LED OutLED drive signal Differential signalsGeneral interface characteristics Eye masks Eye masks overviewReceive eye mask Jitter tolerance masksAbsolute amplitude Normalized time in UIPeak-to SinusoidalJitter Frequency in kHzTransmitter signal characteristics Signal characteristica Units GbpsReceiver signal characteristics Signal characteristic Units GbpsMaximum allowable jitter Gbps m, n Deterministic jitterqImpedance specifications Receiver jitter toleranceCompliant jitter test pattern Cjtpat Impedance requirements Sheet 1Transmitter characteristics Impedance requirements Sheet 2Electrical TxRx connections = -5,437dB Shows the zero-length test load Receiver characteristics Cheetah T10 SAS Product Manual, Rev. a Seagate Technology support services Warranty ServiceInternet MySeagate Spp.seagate.com Presales SupportData Recovery Services Authorized Service Centers Data Recovery ServicesFAX services-All Europe toll call Call center Presales and Technical Support Warranty ServiceToll-free support numbers Africa/Middle East support services Index NumericsPage SAS See also cooling Page Seagate Technology LLC