Seagate ST973451FC, ST936751FC manual FC-AL transmitters and receivers, Power, Fault LED Out

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9.5.5FC-AL transmitters and receivers

A typical FC-AL differential copper transmitter and receiver pair is shown in Figure 17. The receiver is required to provide the AC coupling to eliminate ground shift noise.

TX

Transmitter 100

TY

 

 

.01

RX

 

 

 

100

Differential

100

Receiver

Transfer Medium

 

RY

 

 

.01

 

 

 

Figure 17. FC-AL transmitters and receivers

Savvio drives use 100 ohm termination which makes it compatible with backplanes designed for 1, 2, or 4 Gbit Fibre Channel transfer rates. Previous generations of Seagate FC products used 150 ohm impedance for operation in host systems designed to operate in 1 or 2 Gbit transfer rate environments.

9.5.6Power

Power is supplied through the FC-SCA with support for +5 volts and +12 volts. All of the voltage pins in the drive connector are the same length.

Four 12 volt pins provide +12 volt power to the drive. The current return for the +12 volt power supply is through the common ground pins. The supply current and return current must be distributed as evenly as pos- sible among the pins. The maximum current typically occurs while the drive motor is starting.

Three 5 volt pins provide logic power to the drive. The current return for the +5 volt power supply is through the common ground pins. Distribute supply and return current as evenly as possible among the voltage and ground pins.

The mating connector pins use shorter contacts to achieve power surge reductions and to aid in “hot plugging” the drives. There are longer voltage contacts in the connector to enable the drive filter capacitors to charge. Current to the drive through the long charge pins is limited by the system in which the drive operates. Three of the +12 volt pins are shorter to allow capacitive pre-charging through the longer +12 volt charge pin. Two of the +5 volt pins are shorter to allow capacitive precharging through the longer +5 volt charge pin.

9.5.7Fault LED Out

The Fault LED Out signal is driven by the drive when:

•the drive detects failure of both ports

•the drive detects an internal failure

•the drive receives the appropriate fault LED command from the host

The Fault LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +5 volt supply through an appropriate current-limiting resistor. The LED and the current-limiting resistor are external to the drive.

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Savvio 15K.1 FC Product Manual, Rev. B

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Contents Savvio 15K.1 FC ST973451FC ST936751FCPage Contents Physical/electrical specifications Defect and error managementInstallation Interface requirementsSeagate Technology support services Savvio 15K.1 FC Product Manual, Rev. B List of Figures Page Scope Savvio 15K.1 family disc driveSavvio 15K.1 FC Product Manual, Rev. B Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS Reference documents Ncits TR-19Savvio 15K.1 FC Product Manual, Rev. B General description Standard features Media description PerformanceReliability Formatted capacitiesProgrammable drive capacity Factory-installed accessoriesOptions Performance characteristics Internal drive characteristicsSeek performance characteristics Access timeStart/stop time Format command execution timeGeneral performance characteristics Caching write data Prefetch/multi-segmented cache controlCache operation Prefetch operation Recoverable Errors Reliability specificationsError rates Reliability and service Unrecoverable ErrorsSeek errors Interface errorsControlling S.M.A.R.T Hot plugging the drive4 S.M.A.R.T Performance impact Reporting controlDetermining rate Predictive failuresTemperature Log Page 0Dh Parameter Code DescriptionDrive Self Test DST DST failure definitionState of the drive prior to testing ImplementationInvoking DST Short and extended testsProduct warranty Log page entriesAbort ShippingProduct repair and return information DC power requirements Physical/electrical specificationsAC power requirements General DC power requirement notes Power sequencing Conducted noise immunityCurrent profiles +5V +12VTypical ST936751FC drive +12V and +5V current profiles ST973451FC Power dissipationCURRENT/POWER vs Throughput FC 1GB Random 8 Block Reads CURRENT/POWER vs Throughput FC 4GB Random 8 Block Reads FC CURRENT/POWER vs Throughput FC 1GB Random 8 Block Reads ST936751FCEnvironmental limits TemperatureFC CURRENT/POWER vs Throughput FC 4GB Random 8 Block Reads Relative humidity Effective altitude sea levelShock and vibration ShockPackage size Packaged/product weight Drop height Recommended mounting Corrosive environment Air cleanlinessVibration Acoustics Mechanical specifications Drive dimensions inchesDrive error recovery procedures Defect and error managementDrive internal defects/errors FC-AL system errors Deferred Auto-Reallocation Background Media ScanMedia Pre-Scan Idle Read After Write Cooling InstallationDrive orientation Drive mounting GroundingFC-AL features Fibre Channel link service framesLink services supported Type of frame Interface requirementsFibre Channel task management functions Fibre Channel task management responsesFibre Channel Scsi FCP task management functions Task name SupportedFibre Channel port login NPort login Plogi payload BytesFibre Channel port login accept Fibre Channel Process LoginNPort Login Accept ACC payload Bytes Process Login Plri payloadFibre Channel Process Login Accept Fibre Channel fabric loginProcess Login Accept ACC payload Bytes Fabric Login Flogi payload BytesFibre Channel fabric accept login Fabric Login Accept ACC payload BytesDual port support Fibre Channel Arbitrated Loop optionsFC-AL options supported Option SupportedScsi commands supported Supported commands Command code Command nameDisconnect/reconnect control page 02h Savvio 15K.1 FC Product Manual, Rev. B LBdata Supported commands Command code Supported 4 Command name Inquiry data Savvio inquiry data Bytes Data hexMiscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusPhysical description Physical characteristicsFC-AL physical interface Electrical description Connector requirementsPart description Positions Part number Features Pin descriptions FC-SCA pin descriptions Pin Signal name Signal typePin Signal name Signal type FC-AL transmitters and receivers PowerFault LED Out Motor start controls Enable port bypass signalsActive LED Out Parallel Enclosure Services Interface ESI 11 SEL6 through SEL0 ID linesHex Dec SettingArbitrated loop physical address Alpa values Device control codes Signal characteristicsTTL input characteristics Differential Pecl output Differential Pecl inputSavvio 15K.1 FC Product Manual, Rev. B Seagate Technology support services InternetPresales Support Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index NumericsFAN Page Plogi SEL ID See also cooling
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