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ID:59556221
大小:3.91 MB
页数:85页
时间:2020-11-10
《硬盘结构及基本知识教学内容.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、硬盘结构及基本知识Today’sPCArchitectureIOBusLogicISABusOtherperipheralsCPUPentiumProMemoryPCIBridgeChipVideoGraphicsAdapterCardInterfaceAdapterCardMonitorIDEorSCSIDiscDriveCableRibbonCablePCIBoardEdgeConnectionPCIBoardEdgeConnectionPCIBusLocalSystemBusWiredonMotherBoardWiredonMotherBoardWiredonMotherBoardFi
2、lesCollectionofBytesTextDocumentComputerInstructionsPictureetc..SequenceofBlocksStoredinFileisreferencedbyafilenameratherthanlocationondisk.Filesaremanagedbythecomputer’soperatingsystem..Thediskdrivehasnoawarenessoffiles.StoringFilesonDiscDriveComputerDiscDriveHereare3BlockofDataStartStoringinLocat
3、ion5ControllerInterfaceAdapterFile:Letter.DOCLETTWR.DOCANOTHER.DOC01234567891011121314151617181920DIRECTORYTransferRateinMegaMytespersecond(MBps)HowtoAccessFilesDirectory=AListofFilenamesandLacationsFilenameLETTER.DOCPROGRAM.EXEANOTHER.DOC...Blocklocationondisk5,6*,7*1024,1025*,1026*,1027*12,13*,14
4、*,15*,16*...Theoperatingsysteminthecomputerkeepstrackofthedirectory*InDOS,thedirectorykeepstrackofthelocationforonlythe1stblockofeachfile.TheFileAllocationTable,orFAT,keepstrackofthelocationoftheotherblocks.HDAComponentsDISCCIRCULATEFILTERCLAMPRINGODLIMITSTOPBOTTOMPOLEVCMPCCPREAMPCHIPIDLIMITSTOPHEA
5、DFLEXUREARMPIVOTCARTRIDGEBEARINGTOPVIEWDiscDriveBasicsPCBComponentsHOSTCONTROLLERVCM&SPINDLECONTROLLERREAD/WRITECHANNELMICROCONTROLLERSERVOCONTROLLERSRAMDRAMSHOCKSENSORSPINDLECONNECTORHDACONNECTORSHOCKICMassStorageArchitectureUsingDiscDrivesRead/WriteChannelPositionSystemSPMControlSpindleMotorVCM(V
6、oiceCoilMotor)ControllerInterfaceAdapterMemoryCPUPC-ATSystemBus(ISA)SCSIRibbonCableEmbebbedonmotherboardoradd-incardBlockDefinitionsREAD/WRITEDetectsbitsfromthesignalcomingfromtheCHANNELhead(analog)andconvertsthemintodigitalbitsPOSITIONSYSTEMSeekstoandkeepstheheadspositionedoverthecorrecttrackofdat
7、aonthedisk(E-Block-VCM-Servo)SPMCONTROLKeepsthediskrotatingandattheproperspeedCONTROLLERRecognizesthedigitaldatacomingfromtheReadChannelandorganizesitintoblocksofbytesUsingRecordingHeadToMagnetizeAFilmFilmM
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