Seagate ST3600002SS, ST3450802SS manual Dual port support

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10.2Dual 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.

Cheetah NS 10K.2 SAS Product Manual, Rev. F

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Contents ST3600002SS ST3450802SS Cheetah NS 10K.2 SASPage Contents Installation Defect and error managementInterface requirements Seagate Online Support and Services Seagate Technology support servicesScope Electromagnetic susceptibility Standards, compliance and reference documentsStandards Electromagnetic compatibilityCompliance Reference documents General description Reliability Standard featuresMedia description PerformanceFormatted capacities Factory-installed optionsProgrammable drive capacity Seek performance Performance characteristicsInternal drive characteristics Access timeGeneral performance characteristics Format command execution time minutesStart/stop time Cache operation Prefetch/multi-segmented cache controlCaching write data Prefetch operation Unrecoverable Errors Reliability specificationsError rates Recoverable ErrorsHot plugging the drive Reliability and serviceInterface errors Preventive maintenanceReporting control 4 S.M.A.R.TControlling S.M.A.R.T Performance impactDrive Self Test DST Temperature Log Page 0Dh Parameter Code DescriptionPredictive failures Thermal monitorImplementation DST failure definitionShort test Function Code 001b Product warrantyExtended test Function Code 010b Shipping ST3600002SS DC power requirements Physical/electrical specificationsAC power requirements DC power requirementsGeneral DC power requirement notes ST3450802SS DC power requirementsConducted noise immunity Power sequencingCurrent profiles Typical ST3600002SS drive +5V and +12V current profiles ST3600002SS Power dissipationST3450802SS Environmental limits Temperature a. OperatingShock Relative humidityEffective altitude sea level a. Operating Shock and vibrationRecommended mounting Corrosive environment Air cleanlinessVibration a. Operating-normal AcousticsChina Restriction of Hazardous Substances RoHS Directive Physical dimensions Mechanical specificationsDrive internal defects/errors Defect and error managementDrive error recovery procedures 77.81 Deferred Auto-Reallocation SAS system errorsBackground Media Scan Media Pre-ScanIdle Read After Write Drive orientation Installation Air flow CoolingGrounding Drive mountingInterface requirements SAS featuresDual port support Commands supported by Cheetah NS 10K.2 SAS family drives Scsi commands supportedCommands 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 10.3.2Mode Sense data Inquiry dataPage Mode Pages 10.3.2.1 ST3600002SS Mode Sense data10.3.2.2 ST3450802SS Mode Sense data Miscellaneous features Miscellaneous operating features and conditionsMiscellaneous status SAS physical interface Datum B Connector requirements Physical characteristicsPin descriptions Electrical descriptionSAS pin descriptions Ready LED Out Signal characteristicsPower SAS transmitters and receivers10.5.2.1 Eye masks 10.5.2.1.1 Eye masks overview LED drive signalDifferential signals General interface characteristicsReceive eye mask 2OP 0, 5 xadditional sinusoidal jitter X 1OP Transmitter signal characteristics Maximum allowable jitter Receiver signal characteristicsImpedance requirements Sheet 1 Compliant jitter test pattern CjtpatElectrical TxRx connections Impedance requirements Sheet 2= -5, 437dB Shows the zero-length test load Receiver characteristics SAS-2 Specification complianceAdditional information Cheetah NS 10K.2 SAS Product Manual, Rev. F Index Page SAS See also cooling Page Americas Seagate Technology LLC

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