Seagate ST3400071FC, ST3500071FC manual Active LED Out conditions, Enable port bypass signals

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9.5.8Active LED Out

The Active LED Out signal is driven by the drive as indicated in Table 30.

Table 30: Active LED Out conditions

Normal command activity	LED status

Spun down and no activity	Slow blink (20% on and 80% off a 2 sec cycle)

Spun down and activity (command executing)	On

Spun up and no activity	On

Spun up and activity (command executing)	Off

Spinning up or down	Blinks steadily (50% on and 50% off)

Format in progress, each cylinder change	Toggles on/off

The Active 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.

9.5.9Enable port bypass signals

The – Enable Bypass Port A (– EN BYP Port A) and – Enable Bypass Port B (– EN BYP Port B) signals control the port bypass circuits (PBC) located external to the disc drive. The PBC allows a loop to remain functional in the event of a drive failure or removal. When these signals are active, low, the PBC bypasses the drive on the associated port. When an Enable Bypass signal is active, the corresponding Port Bypass LED signal in con- nector J1 is driven low by the disc drive. A pull down resistor, 1K, located with the PBC should be used to insure the bypass is enabled if the disc drive is not installed.

The Enable Bypass signal is active under failing conditions within the drive, on detection of the Loop Port Bypass primitive sequence, or on removal of the drive. In the bypass state the drive continues to receive on the inbound fibre. Enable Bypass may be deactivated by detection of a Loop Port Enable primitive sequence if the drive has completed self-test and a hardware failure is not present.

Failure modes detected by the disc drive that will enable bypass include:

•Transmitter/receiver wrap test failure

•Loss of receive clock

•Loss of transmission clock

•Drive interface hardware error

64	NL35 Series FC Product Manual, Rev. D

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Contents NL35 Series FC ST3500071FC ST3400071FCPage Contents Defect and error management InstallationInterface requirements Seagate Technology support services NL35 Series FC Product Manual, Rev. D List of Figures NL35 Series family disc driveViii NL35 Series FC Product Manual, Rev. D Scope NL35 Series family disc driveNL35 Series FC Product Manual, Rev. D Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance Environmental protectionReference documents Fibre Channel Interface ManualNL35 Series FC Product Manual, Rev. D General description Standard features Media description PerformanceReliability Formatted capacitiesFactory-installed accessories Factory-installed optionsUser-installed accessories Programmable drive capacityPerformance characteristics Internal drive characteristicsSeek performance characteristics Access timeGeneralized performance characteristics GHzStart/stop time Prefetch/multi-segmented cache controlCache operation Caching write data Prefetch operationPage NL35 Series FC Product Manual, Rev. D Reliability specifications Error ratesReliability and service Recoverable ErrorsUnrecoverable errors Seek errorsPreventive maintenance Mean Time Between Failure MtbfHot plugging the drive 4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact MillisecondsTemperature Log page 0Dh Predictive failuresThermal monitor Parameter Code DescriptionState of the drive prior to testing Drive Self Test DSTDST Failure Definition ImplementationInvoking DST Short and extended testsShort test Function Code 001b Extended test Function Code 010bProduct warranty AbortShipping Product repair and return informationPhysical/electrical specifications AC power requirementsDC power requirements ST3500071FC/ST3400071FC DC power requirementsGeneral DC power requirement notes Power sequencingConducted noise immunity Power dissipation Temperature Environmental limitsRelative humidity Effective altitude sea levelPackage size Packaged/product weight Drop height Shock and vibrationShock Recommended mounting Air cleanliness VibrationTypical idle mode sound power ST3500071FC and ST3400071FC Corrosive environmentAcoustics Mechanical specifications Mounting configuration dimensionsNL35 Series FC Product Manual, Rev. D Defect and error management Drive internal defects/errorsDrive error recovery procedures 108.3 FC-AL system errors Background Media ScanMedia Pre-Scan NL35 Series FC Product Manual, Rev. D Installation Drive ID/option selectionDrive orientation Cooling Air flowDrive mounting GroundingNL35 Series FC Product Manual, Rev. D FC-AL features Fibre Channel link service framesLink services supported Type of frame Link serviceFibre Channel task management functions Fibre Channel Scsi FCP task management functionsFibre Channel task management responses FC Scsi FCP response codesFibre Channel port login NPort login Plogi payloadBytes Fibre Channel port login accept NPort Login Accept ACC payloadFibre Channel Process Login Process Login Plri payloadFibre Channel Process Login Accept Process Login Accept ACC payloadFibre Channel fabric login Fabric Login Flogi payloadFibre Channel fabric accept login Fabric Login Accept ACC payloadDual port support Fibre Channel Arbitrated Loop optionsFC-AL options supported Option SupportedScsi commands supported Supported commandsCommand code Supported Command name Supported commands Supported commands Supported commands Supported commands Mode Sense data Inquiry dataNL35 Series inquiry data Bytes Data hexPage DEF CHG NL35 Series FC Product Manual, Rev. D Miscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusPhysical characteristics FC-AL physical interfacePhysical description Connector requirements Part description Positions Part number FeaturesElectrical description Pin Signal name Signal type Pin descriptionsFC-SCA pin descriptions Power Fault LED OutFC-AL transmitters and receivers Enable port bypass signals Normal command activity LED statusActive LED Out Active LED Out conditionsMotor start control signals Parallel Enclosure Services Interface ESIMotor start controls 11 SEL6 through SEL0 ID linesSetting Arbitrated loop physical address Alpa valuesHex Dec Signal characteristics LED driver signals LED drive signalDifferential Pecl output characteristics Differential Pecl input characteristicsEye diagram data values Link rate GHzNL35 Series FC Product Manual, Rev. D Seagate Technology support services InternetPresales Support Technical SupportWarranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index NumericsFAN Flogi Plogi Page See also cooling