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Seagate Ultra 320, Ultra 160 manual

Models: Ultra 320 Ultra 160

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Seagate Ultra 320, Ultra 160 manual

Contents

Parallel Scsi Interface Page Parallel Scsi Interface Page Revision status summary sheet Revision Date Writer/EngineerParallel Scsi Interface Product Manual, Rev. a Table of Contents Parallel Scsi Interface Product Manual, Rev. a Logical characteristics Wide transferMessage system specification SPI information units Miscellaneous Scsi bus characteristicsScsi commands Drive features List of Figures Xii Parallel Scsi Interface Product Manual, Rev. a How to use this interface manual Interface requirementsScope of Scsi standards General interface description Applicable standardsGlossary Scsi client-server modelPage Page Page Page Page Page Keywords Message Name Hex Code Number Physical interface characteristicsSummary of Scsi messages Scsi bus Scsi IDs and associated Scsi bus arbitration priorities PriorityScsi bus signals overview Pcrc signal usage requirements Scsi target usage of PcrcaSE signals Signal statesSignal values LVD signalsOR-tied signals Voltage and current definitionsData bit P cable Data bit a cable I/O DB15-8 Scsi bus phase Signal sourcesSignal sources DB7-0Timing Scsi bus timingScsi bus control timing values in nanoseconds Reference Type Value ns Unless Timing descriptionNanoseconds unless otherwise noted Scsi bus data and information phase ST timing valuesTiming values for negotiated transfer rate Timing values for negotiated transfer rate in nanosecondsPage ATN transmit setup time Min Receive Scsi bus data and information phase DT timing values Interconnect and system margin Total transmitter error budget Receiver errorsFast-160 Fast-320 Comments Crosstalk time shift ATN transmit setup timeATN receive setup time ISI of dataBus set delay Bus clear delayBus free delay Bus settle delayPCRC receive setup time Flow control receive setup timeFlow control transmit setup time PCRC transmit setup timePower on to selection Data release delayPhysical disconnection delay QAS arbitration delayReceive internal hold time Receive internal setup timeReceive setup time Receive negation periodReset to selection Reset delayReset hold time Residual skew errorStrobe offset tolerance System deskew delaySkew correction range System noise at launchMeasurement points Clocking methods for data transfers LVD measurement pointsST latching data vs. DT latching data Paced transfer on a Scsi bus DT synchronous transfer exampleSynchronous transfers Data transfer modesAsynchronous transfers Paced transfersData group transfers ST Data phase parallel transfersDT Data phase parallel transfers Information unit transfersNegotiation Negotiation algorithmNegotiable fields and effects of successful negotiation When to negotiateNegotiable fields Negotiation message pair Field nameField Name Message Numerically Responding message requirementsResponse shall be Transfer agreements Value Description Message Transfer rate Transfer period factorTransfer period factor relationships Synchronous12.6 REQ/ACK offset Transfer width exponentIureq Protocol optionsProtocol options bits PPR negotiation setting Iureq to zero Bus phases resulting from Iureq changesSdtr negotiation PPR negotiation setting Iureq to one PPR negotiation keeping Iureq set to zeroRTI Retain Training Information WrflowRdstrm PcompenTransfer Period Negotiable field combinationsTransfer Message restrictions Negotiation message sequencesParallel Scsi Interface Product Manual, Rev. a Unexpected and expected bus free phases Scsi bus phases overviewBUS Free phase Expected bus free phases Arbitration and QAS overviewNormal Arbitration phase QAS phase overview QAS protocolSelection phase Selection overview Information unit transfers disabledInformation unit transfers enabled Selection using attention condition timeout procedure Physical reconnection Reselection phaseReselection phase overview Physical reconnection timeout procedure Scsi bus fairnessSignal Phase Direction of transfer Comment Information transfer phasesInformation transfer phases ST synchronous data transfer Asynchronous transferSynchronous transfer DT synchronous transfer Information unit transferPage Data group data field transfer Page Page Page Paced transfer Paced transfer training patternStart of section B DT Data in phase training patternStart of section a DT Data OUT phase training pattern Start of section C3.2 P1 data valid/invalid state transitions Starting pacing transfers at end of training pattern Starting pacing transfers with no training patternEnding pacing transfers Paced information unit transferDeskewing Wide transferCommand phase Data phaseStatus phase Message phaseMessage OUT phase Signal restrictions between phasesMessage in phase exception condition handling Message OUT phase exception condition handlingScsi bus phase sequences Scsi bus phase sequences overviewHard reset or protocol error Reselection Selection Arbitration DT Data Message OUT Data bus protection ST data bus protection using parityParity checking rules for Selection and Reselection phases Data bus protection overviewError detection capabilities Order of bytes in the CRC fieldGeneral message protocols and formats Message formatsTwo-byte messages Message formatOne-byte messages Extended messagesLink Control Messages Link Control message codes Message categoriesExtended Message Codes Key Identify message format DisconnectIdentify Bit ByteIgnore field definition Ignore Wide ResidueIgnore Wide Residue message format Invalid data bitsMessage Parity Error Initiator Detected ErrorLinked Command Complete Message RejectModify Data Pointer message format Modify Bidirectional Data PointerModify Bidirectional Data Pointer message format No OperationParallel Protocol Request Parallel Protocol Request message formatValue 00h 01h-FEh FFh Description Timing values Use QAS for arbitration Use ST Data in and ST Data OUT phases to transfer dataValid protocol options bit combinations Parallel Protocol Request messages implied agreement Save Data Pointers Restore PointersQAS Request Synchronous Data Transfer Request Synchronous Data Transfer Request message formatSdtr messages implied agreements Task Complete Target initiated Sdtr negotiationInitiator initiated Sdtr negotiation Wide Data Transfer Request Wide Data Transfer Request message formatResponding Scsi device Wdtr response Implied agreement Wdtr message implied agreementTarget initiated Wdtr negotiation Task attribute messages Task attribute message overview and codesACA message format Task attribute message codesACA Auto Contingent Allegiance Head of Queue OrderedAbort Task Task management messagesTask management message codes Task management message codes 0EhAbort Task SET Logical Unit ResetTarget Reset Clear ACAMiscellaneous Scsi bus characteristics Bus reset condition Hard resetReset events Asynchronous condition recoveryActive pointers Saved pointersIncorrect initiator connection Command processing considerations and exception conditionsAsynchronous event notification Unexpected Reselection phase SPI information units Information unit transfer logical operationsPage Parallel Scsi Interface Product Manual, Rev. a 115 116 Parallel Scsi Interface Product Manual, Rev. a Parallel Scsi Interface Product Manual, Rev. a 117 SPI command information unit SPI information unitsSPI command information unit Bit Byte Task Attribute Codes Description Task Management flags Codes DescriptionSPI LQ information unit SPI LQ information unit Bit ByteBidi Direction F0H SPI LQ information unit typeCodes Type Description FFh AllPage SPI data information unit Bit Byte SPI data information unitSPI data stream information unit SPI status data stream information unit Bit Byte Reserved Reserved for FCP SPI status information unitSPI status information unit Bit Byte Packetized Failures code Codes Description SPI command information unit fields invalidPacketized Failures field Bit Byte Task management function not supportedPage 130 Parallel Scsi Interface Product Manual, Rev. a Reserved Command implementation requirementsCommand Descriptor Block CDB Page Fixed and variable length Command Descriptor Block formats Additional CDB Data if required Typical CDB for 12-byte commands Bit ByteTypical CDB for 16-byte commands Bit Byte Typical variable length CDB Bit Byte Operation Code 7Fh Additional CDB Length n-7Page Link b Control field Bit Byte LastNaca a Status Status precedence Command examples Single command exampleDisconnect example Disconnect exampleTiming examples Auto Contingent Allegiance or Contingent AllegianceOverlapped commands Clearing an Auto Contingent Allegiance conditionAsynchronous Event Reporting Incorrect logical unit selectionSense data Autosense Unit Attention condition Queued tasks formerly queued I/O processes Target hard resetLogical unit reset Untagged task queuingTagged task queuing Parameter rounding Programmable operating definitionIncorrect initiator connection Self-test operations Default self-testS.M.A.R.T. system Short and extended self-testsSelf-test modes Foreground modeBackground mode Exception commands for background self-tests Device type a Command Reference All device typesProtection code Self-test mode summaryError detection for asynchronous information phases Covered signals Word Location Signal MeaningPage Protection code usage Error detection propertiesCode description Enabling protection code checking Error handlingProtection code transmission Disabling protection code checkingCase 1-Power off during removal or insertion SPI-3 equivalent term SCSI-2 term SPI-3 to SCSI-2 terminology mappingSPI-3 to SCSI-2 terminology mapping Index Code value reserved Disconnect privilege 148 domain 5, 9 dormant Initiator 3, 6, 14, 131, 140 faulted Multidrop 7 multimode Page Scsi Page Wdtr 40 170 Parallel Scsi Interface Product Manual, Rev. a Page Seagate Technology LLC