ST3146356SS in 3 Gbit operation | Seagate ST3300656SS, ST3450856SS

ST3146356SS in 3 Gbit operation

Typical power dissipation under idle conditions in 3Gb operation is 9.59 watts (32.72 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.

		ST3146356SS CURRENT/POWER vs THROUGHPUT (SAS - 3.0GB)
	1.400				Random 8 Block Reads					16.00
	1.400									16.00	5Volt A
											5Volt A
										14.00	12 Volt A
	1.200									14.00	Watts
	1.200

	1.000									12.00
	1.000
Amperes										10.00	Power (watts)
	0.800
										8.00
	0.600
										6.00
	0.400									4.00
										4.00
	0.200									2.00
										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 7. ST3146356SS (3 Gbit) DC current and power vs. input/output operations per second

Cheetah 15K.6 SAS Product Manual, Rev. A

31

Image 37

Seagate ST3300656SS, ST3450856SS manual ST3146356SS in 3 Gbit operation, ST3146356SS CURRENT/POWER vs Throughput SAS 3.0GB

Contents

ST3450856SS ST3300656SS ST3146356SS Cheetah 15K.6 SASPage Contents Installation Defect and error managementSeagate Technology support services Interface requirements Cheetah 15K.6 SAS disk drive List of Figures Cheetah 15K.6 SAS Product Manual, Rev. a Cheetah 15K.6 SAS disk drive Scope Cheetah 15K.6 SAS Product Manual, Rev. a Standards Standards, compliance and reference documentsElectromagnetic compatibility Electromagnetic susceptibility European Union Restriction of Hazardous Substances RoHS Compliance Reference documents Cheetah 15K.6 SAS Product Manual, Rev. a General description Media description Standard featuresPerformance Options factory installed Factory-installed accessoriesReliability Formatted capacities Cheetah 15K.6 SAS Product Manual, Rev. a Internal drive characteristics Performance characteristicsAccess time Seek time General performance characteristics Format command execution time minutesStart/stop time Cache operation Prefetch/multi-segmented cache control Prefetch operation Caching write data Error rates Reliability specificationsRecoverable Errors Unrecoverable Errors Seek errors Reliability and serviceInterface errors Preventive maintenance Controlling S.M.A.R.T 4 S.M.A.R.TPerformance impact Milliseconds Determining rate Reporting controlPredictive failures Thermal monitor Primary Temperature Temperature Log Page 0DhReference Temperature Parameter Code Description Invoking DST State of the drive prior to testingShort and extended tests Short test Function Code 001b Abort Product warrantyShipping Product repair and return information Cheetah 15K.6 SAS Product Manual, Rev. a AC power requirements Physical/electrical specificationsDC power requirements ST3450856SS DC power requirements ST3146356SS DC power requirements ST3300656SS DC power requirementsST3300656SS Gbit mode Amps ST3146356SS Gbit mode Amps Power sequencing General DC power requirement notesConducted noise immunity Current profiles Typical ST3450856SS current profiles Typical ST3300656SS current profiles Typical ST3146356SS current profiles ST3450856SS in 3 Gbit operation Power dissipation ST3300656SS in 3 Gbit operation ST3300656SS CURRENT/POWER vs Throughput SAS 3.0GB ST3146356SS in 3 Gbit operation ST3146356SS CURRENT/POWER vs Throughput SAS 3.0GBRandom 8 Block Reads Environmental limits Temperature Effective altitude sea level Relative humidityShock and vibration Shock Recommended mounting Package size Packaged/product weight Drop height Vibration Air cleanlinessAcoustics Corrosive environment Mechanical specifications Physical dimensions Cheetah 15K.6 SAS Product Manual, Rev. a Drive internal defects/errors Defect and error managementDrive error recovery procedures 51.87 Background Media Scan SAS system errorsMedia Pre-Scan Idle Read After Write Deferred Auto-Reallocation Drive orientation Installation Air flow Cooling Grounding Drive mounting Cheetah 15K.6 SAS Product Manual, Rev. a Interface requirements SAS features Dual port support Commands supported by Cheetah 15K.6 SAS family drives Scsi commands supportedCommand name Command code Supported Commands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Inquiry data Mode Sense dataBytes Data hex Page Mode Pages 2.1 ST3450856SS Mode Sense data 2.2 ST3300656SS Mode Sense data 2.3 ST3146356SS Mode Sense data Miscellaneous features Miscellaneous operating features and conditionsSupported Feature or condition Miscellaneous status SAS physical interface Datum B Connector requirements Physical characteristics Electrical description Pin Signal name Signal typePin descriptions SAS pin descriptions Power Signal characteristicsSAS transmitters and receivers Ready LED Out Differential signals LED drive signalGeneral interface characteristics Eye masks Eye masks overview Jitter tolerance masks Receive eye maskAbsolute amplitude Normalized time in UI Sinusoidal Peak-toJitter Frequency in kHz Signal characteristica Units Gbps Transmitter signal characteristics Signal characteristic Units Gbps Receiver signal characteristicsMaximum allowable jitter Gbps m, n Deterministic jitterq Receiver jitter tolerance Impedance specificationsCompliant jitter test pattern Cjtpat Impedance requirements Sheet 1 Impedance requirements Sheet 2 Transmitter characteristicsElectrical TxRx connections = -5,437dB Shows the zero-length test load Receiver characteristics Cheetah 15K.6 SAS Product Manual, Rev. a Internet Seagate Technology support servicesPresales Support Technical Support Data Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Numerics IndexPage SAS See also cooling