Seagate ST3450802SS, ST3600002SS manual Dual port support

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9.2Dual port support

Cheetah SAS drives have two independent ports. These ports may be connected in the same or different SCSI domains. Each drive port has a unique SAS address.

The two ports run at the same link rate. The first port to successfully complete speed negotiation sets the link rate support by both ports. When the second port participates in speed negotiation, it indicates the only sup- ported speed is the speed selected by the first port. If the first port to complete speed negotiation looses sync before the second port completes speed negotiation, both ports revert back to the power on condition of allow- ing either link rate (1.5 or 3.0 Gb/sec).

Subject to buffer availability, the Cheetah drives support:

•Concurrent port transfers—The drive supports receiving COMMAND, TASK management transfers on both ports at the same time.

•Full duplex—The drive supports sending XFER_RDY, DATA and RESPONSE transfers while receiving frames on both ports.

38	Cheetah NS 10K.2 SAS Product Manual, Rev. C

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Contents Cheetah NS 10K.2 SAS ST3600002SS ST3450802SSPage Contents Seagate Technology support services Defect and error managementInstallation Interface requirementsScope Electromagnetic compatibility Standards, compliance and reference documentsStandards Electromagnetic susceptibilityCompliance Reference documents General description Performance Standard featuresMedia description ReliabilityFactory-installed options Formatted capacitiesProgrammable drive capacity Access time Performance characteristicsInternal drive characteristics Seek performanceFormat command execution time minutes General performance characteristicsStart/stop time Prefetch/multi-segmented cache control Cache operationCaching write data Prefetch operation Recoverable Errors Reliability specificationsError rates Unrecoverable ErrorsPreventive maintenance Reliability and serviceInterface errors Hot plugging the drivePerformance impact 4 S.M.A.R.TControlling S.M.A.R.T Reporting controlThermal monitor Temperature Log Page 0Dh Parameter Code DescriptionPredictive failures Drive Self Test DSTDST failure definition ImplementationProduct warranty Short test Function Code 001bExtended test Function Code 010b Shipping DC power requirements Physical/electrical specificationsAC power requirements ST3600002SS DC power requirementsST3450802SS DC power requirements General DC power requirement notesPower sequencing Conducted noise immunityCurrent profiles Typical ST3600002SS drive +5V and +12V current profiles Power dissipation ST3600002SSST3450802SS Temperature a. Operating Environmental limitsShock and vibration Relative humidityEffective altitude sea level a. Operating ShockPackage size Packaged/product weight Drop height Recommended mountingAcoustics Air cleanlinessVibration a. Operating-normal Corrosive environmentChina Restriction of Hazardous Substances RoHS Directive Mechanical specifications Physical dimensionsDefect and error management Drive internal defects/errorsDrive error recovery procedures 77.81 Media Pre-Scan SAS system errorsBackground Media Scan Deferred Auto-ReallocationIdle Read After Write Installation Drive orientationCooling Air flowDrive mounting GroundingSAS features Interface requirementsDual port support Scsi commands supported Commands supported by Cheetah NS 10K.2 SAS family drivesCommands supported by Cheetah NS 10K.2 SAS family drives Commands supported by Cheetah NS 10K.2 SAS family drives Commands supported by Cheetah NS 10K.2 SAS family drives Inquiry data 2Mode Sense dataBytes Data hex Page 2.1 ST3600002SS Mode Sense data Mode Pages2.2 ST3450802SS Mode Sense data Supported Feature or condition Miscellaneous operating features and conditionsMiscellaneous features Miscellaneous statusSAS physical interface Datum B Physical characteristics Connector requirementsPin descriptions Pin Signal name Signal typeElectrical description SAS pin descriptionsSAS transmitters and receivers Signal characteristicsPower Ready LED OutGeneral interface characteristics LED drive signalDifferential signals Eye masks Eye masks overviewReceive eye mask X2OP 0, 5xadditional sinusoidal jitter X1OP Transmitter signal characteristics Signal characteristica Units 5Gb/s 0Gb/sMaximum allowable jitter Receiver signal characteristicsSignal characteristic Units 5Gb/s 0Gb/s 5Gb/s m, n 0Gb/s m, n Deterministic jitterq5Gb/sa 0Gb/sa Sinusoidal Deterministic Total Receiver jitter toleranceImpedance requirements Sheet 1 JitterhImpedance requirements Sheet 2 Electrical TxRx connections= -5, 437dB Shows the zero-length test load SAS-2 Specification compliance Receiver characteristicsAdditional information Seagate Technology support services Presales SupportTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index Page SAS See also cooling Page Seagate Technology LLC

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