Seagate ST936751FC, ST973451FC Active LED Out, Enable port bypass signals, Motor start controls

Page 69

9.5.8Active LED Out

The Active LED Out signal is driven by the drive as indicated in Table 21.

Table 21: 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

9.5.10Motor start controls

The drive’s motor is started according to the Start_1 and Start_2 signals described in Table 22. The state of these signals can be wired into the backplane socket or driven by logic on the backplane.

Table 22:

Motor start control signals

 

 

 

 

 

Case

Start_2

Start_1

Motor spin function

 

 

 

 

1

Low

Low

Motor spins up at DC power on.

 

 

 

 

2

High

Low

Motor spins up only when SCSI Start command is received.

 

 

 

 

3

Low

High

Motor spins up after a delay of 12 seconds times the modulo 8 value of

 

 

 

the numeric SEL ID of the drive from DC power on.

 

 

 

 

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

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Contents ST973451FC ST936751FC Savvio 15K.1 FCPage Contents Defect and error management Physical/electrical specificationsInstallation Interface requirementsSeagate Technology support services Savvio 15K.1 FC Product Manual, Rev. B List of Figures Page Savvio 15K.1 family disc drive ScopeSavvio 15K.1 FC Product Manual, Rev. B Standards Applicable standards and reference documentationElectromagnetic compatibility Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS Ncits TR-19 Reference documentsSavvio 15K.1 FC Product Manual, Rev. B General description Standard features Performance Media descriptionReliability Formatted capacitiesFactory-installed accessories OptionsProgrammable drive capacity Internal drive characteristics Performance characteristicsSeek performance characteristics Access timeFormat command execution time General performance characteristicsStart/stop time Prefetch/multi-segmented cache control Cache operationCaching write data Prefetch operation Reliability specifications Error ratesRecoverable Errors Unrecoverable Errors Reliability and serviceSeek errors Interface errorsHot plugging the drive 4 S.M.A.R.TControlling S.M.A.R.T Reporting control Performance impactDetermining rate Predictive failuresParameter 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 ShippingProduct repair and return information Physical/electrical specifications AC power requirementsDC power requirements General DC power requirement notes Conducted noise immunity Power sequencingCurrent profiles +5V +12VTypical ST936751FC drive +12V and +5V current profiles Power dissipation CURRENT/POWER vs Throughput FC 1GB Random 8 Block ReadsST973451FC CURRENT/POWER vs Throughput FC 4GB Random 8 Block Reads ST936751FC FC CURRENT/POWER vs Throughput FC 1GB Random 8 Block ReadsTemperature FC CURRENT/POWER vs Throughput FC 4GB Random 8 Block ReadsEnvironmental limits Effective altitude sea level Relative humidityShock and vibration ShockPackage size Packaged/product weight Drop height Recommended mounting Air cleanliness VibrationCorrosive environment Acoustics Drive dimensions inches Mechanical specificationsDefect and error management Drive internal defects/errorsDrive error recovery procedures FC-AL system errors Background Media Scan Media Pre-ScanDeferred Auto-Reallocation Idle Read After Write Installation Drive orientationCooling Grounding Drive mountingFibre Channel link service frames FC-AL featuresLink services supported Type of frame Interface requirementsFibre Channel task management responses Fibre Channel task management functionsFibre Channel Scsi FCP task management functions Task name SupportedNPort login Plogi payload Bytes Fibre Channel port loginFibre Channel Process Login Fibre Channel port login acceptNPort Login Accept ACC payload Bytes Process Login Plri payloadFibre Channel fabric login Fibre Channel Process Login AcceptProcess Login Accept ACC payload Bytes Fabric Login Flogi payload BytesFabric Login Accept ACC payload Bytes Fibre Channel fabric accept loginFibre Channel Arbitrated Loop options Dual port supportFC-AL options supported Option SupportedSupported commands Command code Command name Scsi commands supportedDisconnect/reconnect control page 02h Savvio 15K.1 FC Product Manual, Rev. B LBdata Supported commands Command code Supported 4 Command name Savvio inquiry data Bytes Data hex Inquiry dataMiscellaneous features Miscellaneous operating features and conditionsSupported Feature or condition Miscellaneous statusPhysical characteristics FC-AL physical interfacePhysical description Connector requirements Part description Positions Part number Features Electrical description FC-SCA pin descriptions Pin Signal name Signal type Pin Signal name Signal typePin descriptions Power Fault LED OutFC-AL transmitters and receivers Enable port bypass signals Active LED OutMotor start controls 11 SEL6 through SEL0 ID lines Parallel Enclosure Services Interface ESISetting Arbitrated loop physical address Alpa valuesHex Dec Signal characteristics TTL input characteristicsDevice control codes Differential Pecl input Differential Pecl outputSavvio 15K.1 FC Product Manual, Rev. B Internet Seagate Technology support servicesPresales Support Technical SupportWarranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Numerics IndexFAN Page Plogi SEL ID See also cooling
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