Seagate ST3600957SS, 100516226 manual Differential signals, Bps, SAS-2 Specification Compliance

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Table 15 LED drive signal

STATE

TEST CONDITION

OUTPUT VOLTAGE

 

 

 

LED off, high

0 V ≤ VOH ≤ 3.6 V

-100 μA < IOH < 100 μA

LED on, low

IOL = 15 mA

0 ≤ VOL ≤ 0.225 V

11.5.2 Differential signals

The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS standard. Table 16 defines the general interface characteristics.

Table 16 General interface characteristics

CHARACTERISTIC

UNITS

1.5 GBPS

3.0 GBPS

6.0 GBPS

 

 

 

 

 

Bit rate (nominal)

Mbaud

1,500

3,000

6,000

 

 

 

 

 

Unit interval (UI)(nominal)

ps

666.6

333.3

166.6

 

 

 

 

 

Impedance (nominal, differential )

ohm

100

100

100

 

 

 

 

 

Transmitter transients, maximum

V

± 1.2

± 1.2

± 1.2

 

 

 

 

 

Receiver transients, maximum

V

± 1.2

± 1.2

± 1.2

 

 

 

 

 

11.6SAS-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 6 Gbps 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 during the SNW-3 training gap. The DFE circuit can derive an optimal equalization characteristic to compensate 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.

11.7ADDITIONAL 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.

CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F

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Contents SED Fips 140-2 models Standard models Self-Encrypting Drive modelsPage Contents Installation Defect and Error ManagementAbout Fips About SELF-ENCRYPTING Drives Interface RequirementsCheetah 15K.7 SAS Product MANUAL, REV. F III Seagate Technology Support Services Scope Fips 140-2 L EvelSED STANDARDS, Compliance and Reference Documents StandardsCompliance Korean KCC Australian C-TickTaiwanese Bsmi European Union Restriction of Hazardous Substances RohsGeneral Description Standard Features Media DescriptionPerformance Reliability FACTORY-INSTALLED OptionsFormatted Capacities ST3600057SS ST3450857SS ST3300657FCInternal Drive Characteristics Performance CharacteristicsAccess time Format command execution time minutesGeneral performance characteristics START/STOP TimePREFETCH/MULTI-SEGMENTED Cache Control Cache Operation Prefetch operation Caching write dataReliability Specifications Error RatesReliability and Service Hot plugging the drive Preventive maintenance4 S.M.A.R.T Controlling S.M.A.R.TMilliseconds Performance impactReporting control Determining rateParameter Code Description Temperature Log Page 0DhDrive Self Test DST DST failure definitionImplementation State of the drive prior to testingInvoking DST Short and extended testsLog page entries Product warrantyAbort ShippingAC Power Requirements PHYSICAL/ELECTRICAL SpecificationsDC Power Requirements 600 GB DC power requirements450 GB DC power requirements 300 GB DC power requirements Power sequencing Conducted noise immunityCurrent profiles Typical 450GB current profiles Power Dissipation Temperature a. Operating 300GB modelEnvironmental Limits Effective altitude sea level a. Operating Relative humidityShock Shock and vibrationRecommended mounting VibrationAcoustics Air cleanlinessCorrosive environment RoHS compliance statementUnits of Measure mm inches Mechanical SpecificationsPurpose Validation ProgramSeagate Enterprise SED About SELF-ENCRYPTING Drives Controlled AccessData Encryption Random Number Generator RNGPower Requirements Authenticated Firmware DownloadSupported Commands Drive LockingDefect and Error Management Drive Internal DEFECTS/ERRORSDrive Error Recovery Procedures Read and write retry count maximum recovery times SAS System ErrorsMedia PRE-SCAN Background Media ScanDeferred AUTO-REALLOCATION Idle Read After WriteInstallation Drive OrientationCooling Grounding Drive MountingInterface Requirements SAS FeaturesTask management functions Task management responsesCommands supported by Cheetah 15K.7 SAS family drives Scsi Commands SupportedCommands supported by Cheetah 15K.7 SAS family drives Commands supported by Cheetah 15K.7 SAS family drives Mode Sense data Inquiry dataCheetah 15K.7 inquiry data Cheetah 15K.7 SAS Product MANUAL, REV. F 11.3.2.1 600GBmodel Mode Sense data 11.3.2.2 450GB model Mode Sense data 11.3.2.3 300GB model Mode Sense data Supported Feature or condition Miscellaneous Operating Features and ConditionsMiscellaneous features SAS physical interfaceDatum B This Area Connector requirements Physical characteristicsElectrical description Pin descriptionsSignal Characteristics PowerSAS transmitters and receivers Ready LED OutSAS-2 Specification Compliance Differential signalsBPS Additional InformationIndex Page SAS See also cooling Americas Seagate Technology LLC
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