计算机专业英语影印版(Computing-Essentials-2008)课后答案大全——第八单元C

ComputingEssentials2008Chapter8:SecondaryStorageKeyTermsPage1of6KeyTermsKeyTermDefinitionaccessspeed(214)Measurestheamountoftimerequiredbythestoragedevicetoretrievedataandprograms.Blu-Ray(BD)(222)AdifferentopticalformatthaneithertheDVDortheHDDVDandhaveacapacityof25to50gigabytes,CD(compactdisc)(220)Oneofthemostwidelyusedopticalformats.CD-R(CD-recordable)(220)ACDthatcanbewrittentoonlyonce.CD-ROM(compactdisc–readonlymemory)(220)ACDthatcannotbewrittenonorerasedbytheuser.CD-ROMjukebox(228)Provideautomaticaccesstoalargecollectionorlibraryofopticaldisks.CD-RW(compactdiscrewritable)(221)ACDthatcanbewrittentomanytimes.(Seealsoerasableopticaldisc)cylinder(216)Apartofaharddiskthatrunsthrougheachtrackofastackofplatters.density(215)Howtightlythebits(electromagneticcharges)canbepackednexttooneanotheronadiskette.directaccess(226)Thetypeofstorageandretrievalsystemusedbymagneticandopticaldiscs.diskcaching(219)Aharddiskperformanceenhancementthatimprovesprocessingbyactingasatemporaryhigh-speedholdingareabetweenasecondarystoragedeviceandtheCPU.DVD(digitalversatilediscordigitalvideodisc)(221)aneweropticalformatthathasreplacedCDsasthestandard;similartoCDsexceptthatmoredatacanbepackedintothesameamountofspace.DVDplayer(221)DVDROMdriveDVD+R(DVDrecordable)(221)AtypeofDVDwrite-onceformatDVD-R(DVDrecordable)(221)AtypeofDVDwrite-onceformatDVD-RAM(DVDrandom-accessmemory)(221)AtypeofDVDrewriteableformatDVD-ROM(DVD–readonlymemory)(221)ADVDformatthattheusercannotwritetoDVD-ROMjukebox(228)Provideautomaticaccesstoalargecollectionorlibraryofopticaldisks.DVD+RW(DVDrewritable)(221)AtypeofDVDrewriteableformatDVD-RW(DVDrewritable)(221)AtypeofDVDrewriteableformatenterprisestoragesystem(227)Atypeofsystemthatlargeorganizationsusetopromoteefficientandsafeuseofdataacrossthenetworkswithintheirorganizations.erasableopticaldisc(221)ACDthatcanbewrittentomanytimes.(SeealsoCD-RW(compactdiscrewritable))filecompression(219)Aharddiskperformanceenhancementthatincreasesstoragecapacitybyreducingtheamountofspacerequiredtostoredataandprograms.filedecompression(219)Rebuildingafilethathasbeencompressedfileserver(228)Adedicatedcomputerwithverylargestoragecapacitythatprovidesusersaccesstofaststorageandretrievalofdata.flashmemorycard(223)Creditcard–sizedsolid-statestoragedeviceswidelyusedinnotebookcomputers.floppydisk(214)AportableorremovablestoragemediumthatusesflatComputingEssentials2008Chapter8:SecondaryStorageKeyTermsPage2of6circularpiecesofMylarplasticthathavebeencoatedwithamagneticmaterial.floppy-diskcartridge(214,215)Portablestoragedevicesthatareabletostoremoreinformation,andarethickerthanadiskette.(seealsohighcapacitydisk)floppydiskdrive(FDD)(214)Storesdataandprogramsbyalteringtheelectromagneticchargesonthedisk’ssurfacetorepresent1sand0sharddisk(216)Adevicethatsavesfilesbyalteringthemagneticchargesofthedisk’ssurface,hasgreatercapacitythanadiskette,andfasteraccesstime.hard-diskcartridge(217)Easytoremovecassetteswhosecapacityisonlylimitedbythenumberofcartridges.hard-diskpack(218)Removablestoragedeviceusedtostoremassiveamountsofinformation.HDDVD(high-definitionDVD)(222)ThisformatisverysimilartoDVDexceptthatitsstoragecapacityismuchgreater.headcrash(216)Whenaharddisk’sread/writeheadmakescontactwiththeharddisk’ssurfaceorwithparticlesonitssurfaceresultinginacatastrophiclossofdata.hidef(highdefinition)(222)Thenextgenerationofopticaldischigh-capacitydisk(215)Portablestoragedevicesthatareabletostoremoreinformation,andarethickerthanadiskette.(seealsofloppydiskcartridge)internalharddisk(216)Amagneticsecondarystoragedevicethatislocatedinsidethesystemunit.Internetharddrive(226)SpecialservicesitesontheWebprovideuserswithstorage.label(215)Usuallyonthefrontofadisketteandprovidesuserswithanareatowriteordocumentthecontentsofthedisk.land(220)Flatareasthatopticaldiscsusetorepresent1sand0s.magnetictape(226)Writesdataandprogramsbyalteringtheelectromagneticchargesonarecordingsurfaceandusesasequentialaccessmethodtostoreandretrieveit.magnetictapereel(227)Typeoftapethatwasusedbymainframesandistypically1/2inchwideand11/2mileslongandprovidesmassivestoragecapacity.magnetictapestreamer(227)Thetypeofmagnetictapetechnologyusedbymainframestoday.massstorage(227)Thetremendousamountofsecondarystoragerequiredbylargeorganizations.massstoragedevices(227)Specializedhigh-capacitysecondarystoragedevicesdesignedtomeetstoragerequirementsoflargeorganizations.media(214)Anactualphysicalmaterialthatholdsdataandprograms.opticaldisc(220)Astoragedevicethatusesalaserbeamtoalterthesurfaceofaplasticormetallicdisctorepresentdataopticaldiscdrive(220)Adevicewithalaserthatprojectsatinybeamoflightonadisctoreflectthelighttodetermineapitorland.organizationalInternetstorage(228)High-speedInternetconnectiontoadedicatedremoteorganizationalInternetdrivesite.PCCardharddisk(217)Creditcard-sizehard-diskcartridgesavailableforComputingEssentials2008Chapter8:SecondaryStorageKeyTermsPage3of6notebookcomputerswithtypicalcapacitiesupto5gigabytes.pit(220)Thebumpyareasthatopticaldiscsusetorepresent1sand0s.primarystorage(214)RAMormemory,wh