Seagate ST3450802SS, ST3600002SS manual SAS-2 Specification compliance, Additional information

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9.5.2.5Receiver characteristics

The drive receiver is A.C. coupled. The receive network terminates the TxRx connection by a 100 ohm equiva- lent impedance as specified in table 29.

The receiver operates within a BER of 10-12when a SAS signal with valid voltage and timing characteristics is delivered to the compliance point from a 100 ohm source. The received SAS signal are considered valid if it meets the voltage and timing limits specified in table 26.

Additionally the receiver operates within the BER objective when the signal at a receiving phy has the addi- tional sinusoidal jitter present that is specified in table 28 and the common mode signal VCM over frequency range FCM as specified in table 24. The jitter tolerance is shown in Figure 16 for all Rx compliance points in a TxRx connection. The figure given assumes that any external interference occurs prior to the point at which the test is applied. When testing the jitter tolerance capability of a receiver, the additional 0.1 UI of sinusoidal jitter may be reduced by an amount proportional to the actual externally induced interference between the applica- tion point of the test and the input to the receiving phy. The additional jitter reduces the eye opening in both voltage and time.

9.6SAS-2 Specification compliance

Seagate SAS-2 drives are entirely compatible with the latest SAS-2 Specification (T10/1760-D) Revision 16.

The most important characteristic of the SAS-2 drive at 6Gb/s is that the receiver is capable of adapting the equalizer to optimize the receive margins. The SAS-2 drive has two types of equalizers:

1.A Decision Feedback Equalizer (DFE) which utilizes the standard SAS-2 training pattern transmitted dur- ing the SNW-3 training gap. The DFE circuit can derive an optimal equalization characteristic to compen- sate for many of the receive losses in the system.

2.A Feed Forward Equalizer (FFE) optimized to provide balanced receive margins over a range of channels bounded by the best and worst case channels as defined by the relevant ANSI standard.

9.7Additional information

Please contact your Seagate representative for SAS electrical details, if required.

For more information about the Phy, Link, Transport, and Applications layers of the SAS interface, refer to the Seagate SAS Interface Manual, part number 100293071.

For more information about the SCSI commands used by Seagate SAS drives, refer to the Seagate SCSI Commands Reference Manual, part number 100293068.

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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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