Seagate ST373453LC manual Active LED Out, Enable port bypass signals, Motor start controls

Page 76

9.5.8Active LED Out

The Active LED Out signal is driven by the drive as indicated in Table 24.

Table 24: 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 25. The state of these signals can be wired into the backplane socket or driven by logic on the backplane.

Table 25:

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.

 

 

 

 

4

High

High

The drive will not spin up.

 

 

 

 

68

Cheetah 15K.5 FC Product Manual, Rev. F

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Contents Cheetah 15K.5 FC ST3300655FC ST3146855FC ST373455FCPage Contents Installation Defect and error managementInterface requirements Seagate Technology support services Cheetah 15K.5 FC Product Manual, Rev. F List of Figures Page Scope Cheetah 15K.5 FC Product Manual, Rev. F Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS Reference documents Ncits TR-20Cheetah 15K.5 FC Product Manual, Rev. F General description Standard features Media descriptionPerformance ReliabilityFormatted capacities Programmable drive capacityFactory-installed options Factory-installed accessoriesUser-installed accessories Performance characteristics Internal drive characteristicsSeek performance characteristics Access timeFormat command execution time minutes General performance characteristicsStart/stop time Prefetch/multi-segmented cache controlCache operation Caching write dataPrefetch operation Reliability specifications Error ratesRecoverable Errors Unrecoverable ErrorsReliability and service Seek errorsInterface errors Preventive maintenance4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact MillisecondsReporting control Determining ratePredictive failures Thermal monitorState of the drive prior to testing Parameter Code DescriptionDrive Self Test DST DST failure definitionInvoking DST Short and extended testsShort test Function Code 001b Extended test Function Code 010bProduct warranty AbortShipping Product repair and return informationCheetah 15K.5 FC Product Manual, Rev. F Physical/electrical specifications AC power requirementsDC power requirements DC power requirements for ST3300655FC model Gbit AmpsDC power requirements for ST3146855FC model Gbit Amps DC power requirements for ST373455FC model Gbit AmpsGeneral DC power requirement notes Power sequencingConducted noise immunity Current profilesTypical ST3300655FC drive, 4 Gbit, +12V current profile Typical ST3146855FC drive, 4 Gbit, +12V current profile Typical ST373455FC drive, 4 Gbit, +12V current profile Power dissipation ST3300655FCST3146855FC CURRENT/POWER vs Throughput FC 4GB ST3146855FCTemperature ST373455FC CURRENT/POWER vs Throughput FC 4GBEnvironmental limits ST373455FCRelative humidity Effective altitude sea levelShock and vibration ShockPackage size Packaged/product weight Drop height Recommended mounting Air cleanliness VibrationAcoustics Corrosive environmentRoHS compliance statement Mechanical specifications Mounting configuration dimensionsCheetah 15K.5 FC Product Manual, Rev. F Drive internal defects/errors Defect and error managementDrive error recovery procedures Page FC-AL system errors Background Media ScanDeferred Auto-Reallocation Media Pre-ScanIdle Read After Write Installation Drive ID/option selectionDrive orientation CoolingDrive mounting Air flowGrounding Cheetah 15K.5 FC Product Manual, Rev. F FC-AL features Fibre Channel link service framesLink services supported Type of frame Interface requirementsFibre Channel task management responses Fibre Channel task management functionsFC Scsi FCP response codes Function name Response code Fibre 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 nameVerify error recovery page 07h Cheetah 15K.5 FC Product Manual, Rev. F Temperature page 0Dh Inquiry data Mode Sense dataCheetah 15K.5 FC inquiry data Bytes Data hex Page Mmode Sense 10 Byte Header Data Mode Sense 10 Byte Header Data 00 ae 00 10 00 00 00 08 08 8b b9 98 00 00 02 Miscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusFC-AL physical interface Physical characteristicsPhysical description Electrical description Connector requirementsPin descriptions Pin Signal name Signal type FC-SCA pin descriptions Pin Signal name Signal typeFC-AL transmitters and receivers Power Fault LED OutActive LED Out Enable port bypass signalsMotor start controls Parallel Enclosure Services Interface ESI 11 SEL6 through SEL0 ID linesArbitrated loop physical address Alpa values SettingHex Dec TTL input characteristics Signal characteristicsDevice control codes FC Differential output LED driver signalsFC Differential input Receive eye diagram Eye diagram data values Link rate GHz Cheetah 15K.5 FC Product Manual, Rev. F Seagate Technology support services InternetPresales Support Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index NumericsFAN Flogi Plogi Page See also cooling
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