DVD burner

Developmentprocess

SpeakingofthedevelopmentprocessofDVDburners,onecannotfailtomentionthebirthofDVDandtheestablishmentofstandards.ThebirthofDVDandtheestablishmentofstandardsaredirectlyrelatedtotherapiddevelopmentoftheentertainmentindustry.Itspredecessors,CDandVCD,werebornfromthis.TheincreasingdemandsofmediagiantshavestimulatedhardwaremanufacturerstodevelopnewDVDdiscs.

Note:Intheearly1990s,theAmericanFilmProductionIndustryAdvisoryCommitteedraftedawishletterrepresentingthesevenmajorHollywoodfilmstudios.OneofthemwastorecordoneonaCDMinistryofvideoprogramsofstandardlength(135minutes),andrequirehigherimageandsoundqualitythanLD(thisrequirementwasputforwardinmid-1990,anditwasformallyconfirmedin1994).Atthattime,theimageresolutionofVCDwasonly352×240(NTSCformat)or352×288(PALformat),andthevideoperformancewasfarfromenoughtomeettheaboverequirements.

OnDecember16,1994,Sonytooktheleadinpublishingthe"Single-sidedanddouble-layer12CM(5.25inches)high-densitymultimediaCDformatandtechnicalindicators",referredtoasMultiMediaCompactDiscSystem(MMCD)Disc),thisisthefirstDVDtechnicalspecification.AtthebeginningofDVD,therewasalotofcompetition.Sony-PhilipsGroup’sMMCD(single-sided,double-layerstructure)andToshiba’sSD(dual-layer,double-sidedstructure)foughtfiercely.Thebattledidnotendcompletely,butcontinuedtothespecificationoftheDVDburner!

SincetheCDburningtechnologyisverymature,itisveryrealistictorealizeDVDburning.BeforethebirthofthefirstDVDburner,avigorousbattleforDVDburningstandardsbeganagain!

ToclarifythiscomplexdisputeoverDVDburningstandards,wemustfirstmentionaDVDthatwasestablishedshortlyafterthebirthofDVDandistheonlyofficialorganizationofDVDthathasasignificantimpactonthedevelopmentofDVD.:DVDForum.ThisDVDConsortium(DVDConsortium),establishedinApril1997,iscomposedoftenmajorDVDmanufacturers,alsoknownas10C.ItisthemwhocollectpatentsfromChineseDVDmanufacturers-Hitachi,Panasonic,Mitsubishi,Philips,Pioneer,Sony,TomSun,Time-Warner,ToshibaandJVC.AllmembersofthethreemainDVDburningR&D/promotionorganizations-RWPPI,RDVDC,andDVD+RWAlliancearebasicallymembersoftheDVDforum.

Intheory,anyDVD-relatedstandardsmustbeapprovedbyit.ButaftertheDVDspecificationwasunified,theDVDForumdidnotunifytheDVDburningstandards,anditisnotamandatoryorganizationafterall.

PhilipsandSony,whichfailedinthebattleforDVDstandards,wereeagertodeveloprecordableDVDswhentheDVDwasofficiallylaunchedin1996,andco-foundedtheDVD+RWAlliancewithHP.ItisthespecificationmakerofDVD+RWandDVD+R.Atthesametime,PioneeralsoreleaseditsrecordableDVDtechnologyin1997-DVD-RandlaterDVD-RW,asitfacesthemainstreamDVDvideomarketandisanimportantsupplementtotheweaknessesofDVD-RAM.ItquicklypassedtheDVDForumcertificationandbecametheofficialDVDrecordableDVDstandardfornon-datastorageapplications(DVD-RandDVD-RAMwereapprovedbytheDVDForumatthesametime).Inthisway,DVDburningtechnologyhasthreecategoriesandfivespecifications(DVD-RAM,DVD-R/RW,DVD+R/RW).ThefollowingisabrieflistofthedevelopmenthistoryofDVDburningstandards:

1996DVD-ROM,DVD-Video

1997DVD-RAM(Ver1.0;2.6GB)DVD-R(Ver1.0;3.95GB)

1998DVD-R(Ver1.9;4.7GB)

1999DVD-AudioDVD-RAM(Ver2.0;4.7GB)DVD-RW(Ver1.0;4.7GB)DVD+RW(3.0GB)

2000DVD-RAM(Ver2.1;4.7GB)DVD-R(Ver2.0;4.7GB/writertype)

DVD-R(Ver2.0;4.7GB/universaltype)DVD-RW(Ver1.1;4.7GB)

DVD+RW(Ver0.9;4.7GB)

2001DVD+RW(Ver1.0;4.7GB)

DVDMulti(Ver0.9)

DVDMulti(Ver1.0)

DVD+RW(Ver1.1;4.7GB)

2002DVD+R(Ver1.0;4.7GB)

Relativelyspeaking,DVD+RWisthemostadvantageousofthethreestandards.ItisbetterthanDVD-RWinrecordingmediasuchasmovingimagesandmusic,CoupledwiththeinterventionofMicrosoft,themarketpotentialisveryhuge,itisverypossibletoachieveaunifiedDVDburningstandard.However,undertheconstraintsofvariousfactors,threedifferentstandardshavebasicallyformeda"threekingdoms"situation.

Twocompetingandincompatibleformatsarestrivingtobecomeindustrystandards.Bothformatscanstorevideoanddata,butthisincompatibilitybringsuserswhichonetobuyTheproductisconfused,sothereisaDVDburnerthatsupportsbothformatsonthemarket.Inordertowinthesupportofmoreusers,moreandmoreDVDscanalsobecompatiblewithotherspecifications.ThisisrepresentedbyBenQDW800A.ThroughBenQ’suniquediscconversiontechnology-BookTypeManagement",youcaneasilychangetheparameterannouncementoftheburnedDVD+R/RWdisctotheDVD-ROMformat,regardlessoftheDVDdriveorthehomeDVDplayer.Easilyreadand99%compatibility.

ThequarrelaboutDVDburnerspecificationscontinues,andsinceMay2001,theDutchPhilipscompanylaunchedthefirstDVDburnertotheglobalmarket——AfterDVDR1000,moreandmoreopticalstoragemanufacturersquicklyfollowedup,andthedevelopmentofnewproductsaccelerated.Withtheexpansionofproductioncapacity,thepriceofDVDburnerscontinuedtoberational.Attheendof2003,BenQDW400AfellbelowThe1,000yuanmark,aperfectstormoflarge-scalepopularizationofDVDburnerskickedoff.ThisalsoconfirmsthepredictionwhenthefirstDVDburnerontheglobalmarketwasofficiallyborninMay2001:withintwoyears,DVDwillcompletelyruleouraudio-visuallife!

Mainstreamspecifications

DVD-RAMDVD-RAMismadeofPhased-changedDualandsomeMOtechnologies,withaminimumcapacityof2.58GB,Upto4.7GB.TheearlyDVD-RAMwasallprotectedbyashell,theusermustconnecttheshellandDVD-RAMintotheDVD-RAMreadertowritedata.Later,anotherremovableADVD-RAMwithalowershell,butitstillneedsitsshelltowritedata.Thecurrentdouble-sidedDVD-RAMalsohastheoptionofremovingtheshell.Thefirst-generationDVD-RAMcameoutinJune1998,and2.0wasreleasedayearlaterVersion,thecapacityhasbeenupgradedto4.7GB.PanasonicandHitachireleasedDVD-ROMsthatsupportDVD-RAMin1999.

DVD-R

DVD-RislikeCD-LikeR,theyareallmadeusingorganicdyes.MostDVDreadersandplayerssupportDVD-R.TheinitialDVD-Rcapacityisonly3.95GB,anditwaslaterexpandedto4.7GB.,TheearlyDVD-Risdividedintotwocategories:DVD-R(G)andDVE-R(A),DVD-R(A)

isaimedattheprofessionalmarket,using635-nmlaserwritingData,asearlyasOctober1997byPIONEER

releasedversion1.0,untilthereleaseof4.7GDVD-R(A)version1.9inMay1999

Features:DVD-R(A)TherecordercannotwritetoDVD-R(G),andtheDVD-R(G)recorderalsocannot

writetoDVD-R(A)

DVD-RW

BeforeDVD-RWKnownasDVD-R/W,PioneerlaunchedahomeDVD-RWrecorderinJapaninDecember1999.DVD-RW,likeCD-RW,canberewrittenmorethan1,000times.DVD-RWadoptsTrackPitch,MarkLengthandRotationControlsimilartoDVD-R.AllPioneer,SharpandZenithDVDfunctionscanreadDVD-RW.TherearethreetypesofDVD-RWdiscs.The1.0versionofDVD-RWisrarelyavailableincountriesotherthanJapan.ThemostimportantthingisthatthistypeofDVD-RWisnothighlycompatible.Version1.1ofDVD-RWhasaddedPre-RecordedLead-intechnologytoimprovecompatibility.ThelastoneistheBversionofDVD-RW1.1.TheBversioncontainsauniqueIDthatcancopyprotectedDVD-ROMs.ThethreetypesofDVD-RWhaveacapacityof4.7GB..

Features:Theadvantageisthatithasgoodcompatibility,cansavedatainDVDvideoformat,andcanbeplayedonaDVDplayer.Ittakesanhourandahalftoformat.

DVD+R

DVD+RisactuallyavariantofDVD+RWthatcanbewrittenonce.ThedyeingmethodofDVD+RisverysimilartoDVD-R,soDVD+RItisalsocompatiblewithsomeDVD-Rs.

Features:DVD+RcanwritedatainCLVformat.

DVD+RW

TherewritingtechnologyofDVD+RWisbasedonCD-RW,anditcameoutaroundtheendof2001.Philips,SONY,HP,Dell,RicohandYamahaallsupportDVD-RW.DVD+RWburnerscanreadDVD-ROMandCD-ROM,andmayalsoreadDVD-RandDVD-RW,butnotDVD-RAM.Onthecontrary,mostDVD-ROMandDVDplayerscanalsoreadDVD+RW.

InadditiontoburningDVD+RW,DVD+RWburnerscanalsoburnCD-RandCD-RW.ThecurrentcapacityofDVD+RWis4.7GBperside.Theearlierversion1.0hadonly2.8GBperside,anditwasnotcompatiblewithmostplayersandDVD-ROMs.

Features:Itiseasytouse,anditimprovesthecompatibilityofDVD-RWdrives.Itcanbeformattedinthebackgroundfromthestartofburning,soyoucanstartburningdatainoneminute.DVD+RWdiscssupporttworecordingformats,SequentialVideoAcessCLVformatandRandomAcessCLVformat.DiscsthatnolongersupportDVD-RandDVD-RWspecifications

DVDMulti/DVDDual

DVDMultiandDVDDualarederivedfromtheabovespecifications.DVDDUALburnersurpassesthethresholdofDVD+RWorDVD-RWsinglespecificationburning,andcanburnDVDdiscsofbothDVD+RWandDVD-RWspecifications,andduetotheflexibledesignoftherecordingchip,evenifitisduetotherightsinthefutureThechangescausedbythetrendofgoldorthetwospecificationscanbeflexiblyadjustedindesign,therebyavoidingthewasteofresourcesandtimeforrepeateddevelopment.

DVDMultifeatures:integratedDVD-R/RWandDVD-RAM

DVDDualfeatures:integratedDVD+R/RWandDVD-R/RW

Technologyoverview

Relatedtechnologies

Losslessconnectiontechnology

Whenburning,encounterbufferunderrunorIncaseofsystemproblemssuchasvibration,LosslessLinkwillbeactivatedandtheburningwillbetemporarilystopped.Atthesametime,theburningbreakpointwillberecordedbyitself.Whenthedataflowreturnstonormal,continuerecordingfromthelastrecordedposition.Thegapbetweentherecordingbreakpointsiscontrolledwithin1micron,whichisenoughtoensurethequalityoftherecording.

BufferUnderrun(scrapfilmtermination)technology

BufferUnderrun’sscrapfilmterminationrecordingtechnologycanfullyguaranteetherecordingqualityofthedisc,andtheheatdissipationholedesigncanfacilitatetheexhaustofhotair,Toavoidadverseeffectsonthemachineitselfortheopticaldiscduetothehighinternalworkingtemperatureofthemachine.Itcannotonlystabilizetheoperationofthedisc,butalsoensuregoodrecordingquality.

Tiltcontroltechnology

Tiltcontroliscalled"laserintelligentguidance"technology,anditsfunctionistoadjustthelaserreadandwritepowerbyitselftoprotectthediscConsistencyoftheburningprocess.Ideally,thediscshouldbeperpendiculartothespindlemotoroftherecorderat90degrees.

Intheactualburningoperation,duetothedifferentmaterialsandmanufacturingprocessoftheburningdiscitself,theinclinationangleoftheburningdiscfromtheinsidetotheoutsidewillbedifferent,whichwillcausethelasertobetransmittedtothesurfaceofthedisc.Thepowerfluctuates.Therecorderequippedwithlaserintelligentguidancetechnologycanintelligentlyadjustthelaserpoweraccordingtothequalityandoperatingstatusofthedisc,soastoensuretheconsistencyoftheentireburningprocess.

Defectmanagementtechnology

Defectmanagementisalsocalledintelligenterrorcorrectionsystemtechnology.Itsfunctionistoeffectivelydetectdefectsonthedisc.Oncetheproblematicpointsarefound,theywillberecorded.Intheprocessofreadingandburningthedisc,therecorderautomaticallyskipstheserecordedareastoensurethequalityofreadingandburningthedisc.Inthisway,evenifconsumersunintentionallyusepoor-qualitydiscs,theydon'thavetoworryabouttheinabilitytoreadthediscorthepoorrecordingeffect.

QuickBackgroundFormattingtechnology

ThisistheuniquetechnologyofDVD+RWburners.ComparedwithDVD-RWburners,theentirediscformatmustbecompletedbeforeburning.(Ittakes20-30minutes).TheDVD+RWburnercanperformfastbackgroundformatting.Afterthediscisputintotheburner,thediscwillbeautomaticallyformattedquicklyinthebackground.IfthediscisinsertedYoucanalsostartburningatthesametime,soyoudon’thavetowaituntiltheentirediscisformattedbeforeyoustartburning.

Mt.Rainiertechnology

ThistechnologyisalsoaddedinsomeCD-RWs.TheroleofMt.Rainier(dragandburn)isontheharddisk.Directlydraganddropwiththemouse,nocomplicatedsoftwareoperationsarerequiredtoachievethepurposeofburning,makingtheburningworkassimpleandhumaneascopyingfilesfromtheharddisk.

Interfacetype

Theinterfaceoftheopticalstoragedriveisthephysicallinkbetweenthedriveandthesystemhost.Itisthedatatransmissionpathfromthedrivetothecomputer.Differentinterfacesalsodeterminethedriveandthesystem.Datatransferspeedbetween.Typeofinterfaceconnectingopticalstorageproductsandsystem:

ATA/ATAPIinterface

USBinterface

IEEE1394interface

SCSIinterface

Parallelinterface

Theearliestopticalstorageproductsalsousedsomespecialinterfaces.Forexample,Sony,Mitsubishi,Panasonicandotheropticaldrivemanufacturershavedevelopedthecompany'sspecialandopticaldriveinterfaces.Suchinterfacesarenotcompatiblewitheachother,suchasSONY's34-pininterface,whilePanasonic'sisa40-pininterface.Therefore,thistypeofdedicatedinterfacerequiresadditionalhardwaresupport,suchasthedrivercardthatcomeswiththemachine.Inaddition,somesoundcards,suchasSoundBlaster,ProAudioSpectrum,etc.,alsointegratethiskindofdedicatedopticaldriveinterfaceonthecard.

Installationmethod

Therearetwotypesofopticalstorage:externalandbuilt-in.Thebuilt-intypeisinstalledinsidethecomputerhost,andtheexternaltypeisconnectedtothehostthroughanexternalinterface.

Built-inisthemostcommontypeofopticalstorageproductsintheDIYmarket.Almostallopticalstoragemanufacturershaveproducedproductswithbuilt-inATA/ATAPIinterfaces.

ExternalopticalstorageTheproductismainlyaimedatuserswhoneedtoworkonthemove,moreemphasisonmobility,inferiortothebuilt-inopticaldriveintermsofperformance.Thedatatransferrateislimitedbytheexternalinterface.Basedonthedemandforportability,thevolumeandweightofexternalopticalstorageproductsarerestricted.Therefore,theperformanceofexternalopticalstorageproductsinthehomemarketismuchlowerthanthatofthebuilt-intype;whileintheprofessionalmarket,theperformanceisbasicallyequivalenttothatofthebuilt-intype.Buttheportabilityisgreatlydiscounted,andthepriceismuchhigherthanthebuilt-intype.

Burningsoftware

TheindispensablesoftwareandhardwareinburningDVDvideodiscsareburnersoftware,DVDburner,andburningdiscs.Thehardwareneedstobepurchasedatacomputerstore,andthesoftwareissometimesincludedwhenbuyingarecorder,andmostofthemwillsearchtheInternettodownloadandusetheDVDrecordersoftwarethatmeetstheneeds.HereisarecommendedChineseversionoftheraccoonDVDburningsoftwarethathasagoodreputationontheInternet,whichcandirectlyburnalmostallpopularvideoformats.Italsohasauxiliaryfunctionssuchasvideoediting,3Deffects,andDVDadvancedsettings.Noregistrationcodeisrequiredandeasytooperate.,Easytouse.

Burningspeed

ThemaximumburningspeedthattheDVDburnersinthemarketcanreachis16timesspeed.Fortheburningspeedof2to4timesspeed,theratepersecondThedatatransfervolumeis2.76M～5.52MB,andittakesabout15-27minutestoburna4.7GBDVDdisc;whileburningat8timesspeedonlytakes7to8minutes,whichisonlycomparedtoburningaCD-R.Thespeedisabitslower,buttakingintoaccounttheamountofdataitburns,theburningspeedof8xspeedhasreachedaveryhighlevel.DVDburningspeedisthemostimportantfactorinbuyingaDVDburner.Ifyouhavesufficientfunds,chooseahigh-speedDVDburnerasmuchaspossible.

Readingspeed

MaximumDVDreadingspeedreferstothemaximumopticaldrivespeedthatopticalstorageproductscanachievewhenreadingDVD-ROMdiscs.ThespeedisdefinedintermsofDVD-ROMspeed.ThemaximumDVDreadingspeedthatDVD-ROMdrivescanreachis16times;themaximumDVDreadingspeedthatDVDburnerscanreachisalso16times;themaximumDVDreadingspeedsupportedbyComboproductsinthemallismainly8timesspeedAnd16timesspeedtwokinds.

Rewritingspeed

DVDrewritingspeedmeansthattheDVDburnerburnstheDVDburningdiscofthecorrespondingspecification,andwhenthereisdatastoredonthedisc,iterasesthedataandburnsanewone.Themaximumrecordingspeedofthedata.ThemaximumDVDrewritingspeedthatcanbeachievedbyDVDburnersofvariousstandardsis4timesthespeed,whichisabout5.4MB/spersecond.

Seektime

AverageseekTracktimeisanimportantindicatortomeasureopticalstorageproducts.Itreferstotheaveragetimeittakesforopticalstorageproductstofindadatatracklocatedinthereadableareaof​​anopticaldisc.Theunitismilliseconds.Theaverageseektimeisthekeytopurchasingopticalstorageproducts.Oneoftheparameters,fasteraverageseektimecanprovidehigherdatatransmissionspeed.

Thespeedofopticalstorageproductshasbeenincreasing,andtheproblemoflowdatatransmissionspeedhasbeenbettersolved,buttheincreaseinspeedhasbroughtsomeothernewproblems.Thehigh-speedrotatingdiscispronetovibration,noise,andgreaterheatgeneration.Thevibrationwillincreasethedifficultyofpositioningthelaserheadandwillinevitablyleadtoalongerseektime.Therefore,asthedoublespeedoftheopticaldriveincreases,thetransmissionmechanismandpositioningsystemofthelaserheadhavealsobeendeveloped,soastoensurethattheseektimeisreducedwhilethedoublespeedisincreased.Theaverageseektimeofthefirst-generationsingle-speedopticaldriveis400ms,whilethelatest40-56-speedopticalstorageproductshaveaseektimeof80-100ms,whichhasgreatlyimprovedthespeed.TheaverageseektimeofarecorderisgenerallylongerthantheaverageseektimeofaCD-ROM.Theshortertheaverageseektime,thefasterthedatatransmissionspeedprovidedbytheopticalstorageandthebetterthecontinuoustransmissionperformance.

Cachecapacity

Opticalstoragedriveshaveinternalbuffersorcachememory.Thesebuffersareactualmemorychips,mountedonthecircuitboardofthedrive,whichmayprepareorstorelargerdatasegmentsbeforesendingdatatothePC.ThetypicalbuffersizeforCD/DVDis128KB,butthespecificdrivecanbelargeorsmall(usuallythemorethebetter).ArecordableCDorDVDdrivegenerallyhasalarge-capacitybufferof2MB-4MBormoretopreventbufferunderrunerrorsandatthesametimemaketherecordingworksmoothandconstantwriting.Generallyspeaking,thefasterthedrive,themorebuffermemorytohandlethehighertransferrate.

CD/DVDdriveswithbufferingorcachinghavemanyadvantages.BufferingcanensurethatthePCreceivesdataatafixedspeed.Whenanapplicationrequestsdatafromthedrive,thedatamaybelocatedindifferentplacesscatteredonthedisc.Becausetheaccessspeedofthedriveisrelativelyslow,thedrivehastosenddatatothePCatintervalswhenreadingdata.Thebufferofthedrivecanreadandpreparethecontentdirectoryoftheopticaldiscinadvanceunderthecontrolofthesoftware,thusspeedingupthefirstdatarequest.

ThelawforCD-ROMdrivetoreaddataistosearchinthecachefirst.Ifitisnotfoundinthecache,itwillsearchonthedisc.Thelarge-capacitycachecanreadmoredatainadvance,butinpracticalapplicationsInCD-ROM,DVD-ROMandotherreadoperations,thechanceofreadingrepeatedinformationisrelativelysmall.Mostoftheopticaldiscsaremoreoftenreadmorefilesatatime.,TheimportanceofcacheonDVD-ROMdrivesisnotreflected,somostoftheseproductsusesmallercachecapacity.CD-ROMgenerallyhasseveralkindsof128KB,256KB,512KB;andDVDgenerallyhas128KB,256KB,512KB,onlyindividualexternalDVDdriveadoptslargercapacitycache.

OnrecordersorCOMMBOproducts,cachingbecomesveryimportant.Whenburningadisc,thesystemwillpre-readthedatathatneedstobeburnedintothecache,andthenreadthedatafromthecacheforburning.Thecacheisthebridgebetweenthedataandtheburningdisc.Whenthesystemtransfersdatatothecache,thetransferwillinevitablystop.Forexample,whenburningalargenumberofsmall-capacityfiles,theharddiskreadingspeedmaynotkeepupwiththeburningspeed,whichwillresultinthedatainthecache.Theinputandoutputarenotproportional.Ifthisstatecontinuesforaperiodoftime,itwillcauseallthedatainthecachetobeoutput,andnoinputwillbeobtained.Atthistime,itwillcauseacacheunderloaderror,whichwillleadtoafailuretoburnthedisc.Therefore,therecorderandCOMMBOproductswillusealargercachecapacity,coupledwiththeanti-engravingtechnology,canminimizetheprobabilityofburningabaddisk.Atthesametime,thecachecanalsocoordinatethedatatransmissionspeedtoensurethestabilityandreliabilityofthedatatransmission.

Burnerproductsgenerallyhave2MB,4MB,8MB,andCOMBOproductsgenerallyhave2MB,4MB,8MBcachecapacity.Duetothelimitationofmanufacturingcost,thecachecannotbemadelargeenough.However,therightamountofcachecapacityisstilloneofthekeystoconsiderwhenchoosingopticalstorage.

Writingmethods

Thewritingmethodsusedwhenmakingdifferenttypesofopticaldiscsarenotthesame.Thecommonlyusedwritingmethodsareasfollows:

DiskAtOnce

DiskAtOnce,generallyabbreviatedasDAO.One-timewritingisasinglewritingmethod.Thebootarea,datatrack,andlead-outareaareallone-timewrites.Afteronewrite,thediscisclosed.Eveniftheentirediscisnotfilledinthiswrite,itcannotbewrittenagain.Enterotherdata.Whenthebootareaiswrittentothedisc,thenextavailableaddressisnotmarkedinthebootarea,sothediscisconsideredclosedandnomoredatacanbewritten.

Thiswritingmodeismainlyusedforcopyingofopticaldiscs,whichcancompletetheburningoftheentireopticaldiscatonetime.Itscharacteristicisthatitcanmakethecopieddiscbethesameasthesourcedisc.TheDAOwritingmethodcaneasilycompletetheduplicationofdiscswithgapsbetweendatatrackssuchasmusicCDs,hybridorspecialtypesofCD-ROMs,andcanensurethatthedatastructureandgaplengthareexactlythesame.ItisworthmentioningthatbecausetheDAOwritingmethodtreatstheentirediscasasection,somesmallerrorsmaycausetheentiredisctobecompletelyscrapped,soithasanimpactonthestabilityofdatatransferandtheperformanceofthedrive.Higherrequirements.

Trackwriting

TrackAtOnce,generallyabbreviatedasTAO,whichisdifferentfromDAOsinglewriting,TAOisamultiplewritingmethod.TAOisatrack-basedwritingmethod.Alltracksarewrittenonebyoneduringawritingprocess.Ifthereismorethanonetrack,anothertrackwillbewrittenaftertheprevioustrackiswritten,andtheprevioustrackwillbewrittenThesectionisnotclosedaftertheend.

Becauseeachtrackisburnedinthisway,thatistosay,aftertheprevioustrackisburned,thelaserheadshouldbeturnedoff,andthenturnonwhenthenexttrackisburned.Therefore,therearegapsbetweentracksrecordedinTAO.Ifitisbetweenthedatatrackandtheaudiotrack,theintervalis2to3seconds,ifitisbetweentheaudiotrack,theintervalis2seconds.Thishasnoeffectonburningdatadiscs.

WhenwritinginTAOmode,youcanchoosenottoclosethesection,andyoucanaddatracktothissectionofthediscinthefuture.ItisgenerallyusedforburningmusicCDsandisinvalidfordatadiscs.ThemusicCDwithouttheclosedsectioncannotbeplayedontheCDorVCDplayer.Theunclosedsectioncanbeclosedintheburningsoftware,andthenitcanbeplayedontheCDorVCDplayerafterclosing.TheTAOmodeismainlyusedintheproductionofmusicCDsormixed,specialtypesofCDs.

Sectionwrite

SessionAtOnce,generallyabbreviatedasSAO.Thiswritingmodeonlyburnsonesectionatatimeinsteadoftheentiredisc,andtheremainingdiscspacecanbeusednexttime;itisoftenusedintheproductionofmulti-sessionCD-ROMs.Itsadvantageisthatitissuitableformakingcompilation-typeopticaldiscs.However,eachtimeanewsectionisburned,ittakesabout13MBofdiscspacetostorethestructureofthesectionandtheconnectioninformationoftheprevioussection,andprepareforthecreationofthenextsection.Therefore,toomanysessionswillwastemorediscspace.

Fastwriting

OnTheFly,generallyabbreviatedasOTF.Averycommonwritingmethod.Intheearlydays,becausethecomputingspeedofthecomputercouldnotmeettherequirements,thedatacouldonlybeconvertedintoanImageFileinISO-9660formatbeforeburning,andthenburned;computerTheprocessingspeedcanachievecompletereal-timeconversion.ThiswayofautomaticallyconvertingdataintoISO-9660formatinrealtimeandthenburningitiscalledfastwriting.

Multi-sessionwrite

Multi-sessionwritemode(MultiSession),generallyabbreviatedasMS.Eachburningprocessonlyburnsandclosesonesession,andtheremainingspacecancontinuetoburnthenextsessionnexttime.Therefore,thereareoftenmultiplesessionsonanopticaldisc,whichiscalledamulti-sessionopticaldisc.Ifthereisonlyonesessioninthedisc,butthediscisnotclosed,itcanalsobecomeamulti-sessiondisc.Thismethodismostlyusedforrecordingdatadiscs,andtheconvenienceisthatitisnotnecessarytoburntheentirediscatatime.

Datapacketwriting

Datapacketwritingisamethodofmultiplewritinginthetrack,whichcaneffectivelyreducethewasteofburningdiskspace.Eachdatapacketuses4sectors,onefor"in",2for"out",andonefor"link".Thedatagramcanbefixedoradjusted,butmostrecordersandburningsoftwareusefixed-sizedatapackets,whichwillbemoreconvenientandeffectivewhendealingwithfilesystems.DatapacketwritingusuallyusesUDF(UniversalDiskFormat)filesystem,butuntilWindows2000doesnotdirectlysupportdatapacketwritingorUDFfilesystem,somespecialdriversmustbeloaded.

Double-layerburning

Whenitcomestodouble-layerburning,wemustfirstexplainthespecificationsofDVDdiscs.DVDdiscsaredividedintosingle-sidedsingle/duallayeranddouble-sidedsingle/duallayerspecificationsaccordingtotherecordingmethod,soaccordingtothedifferentspecifications,therewillbedifferentcapacities.Therefore,DVDscanbedividedintofourspecificationsaccordingtothedifferentcapacities.DVD-5,DVD-9,DVD-10andDVD-l8.DVD-5andDVD-9discsaremorecommononthemarket.

DVD-5specification:single-sidedsingle-layer,sothestandarddatarecordingcapacityis4.7GB.DVDdiscsofthisspecificationaremostlyinthemarketbecausetheproductionmaturityofthisspecificationisthehighest.DVD-9specification:single-sideddouble-layer,thatis,thedatalayerisincreasedtotwolayers,andasemi-transparentreflectivelayerissandwichedinbetween,sothatwhenreadingthesecondlayerofdata,thereisnoneedtoturntheDVDdiscoverJustswitchthefocuspositionofthelaserheaddirectly.Theoretically,thedatarecordingcapacitycanbeincreasedto9.4GB,butbecausethedouble-layerstructurewillinterferewiththestabilityofthesignal,theactualmaximumdatarecordingcapacitycanonlyreach8.5GB.

Thefunctionofsupportingdouble-layerburningmeansthatitsupportssingle-sideddouble-layerDVDdiscburningfunction,whichisaDVDburnerthatsupportsDVD-9burning.Ofcourse,inordertoachievedouble-layerrecording,inadditiontothesupportoftherecorder,thesupportofthediscandtherecordingsoftwareisalsorequired.WiththepopularizationofbroadbandnetworksanddigitalproductssuchasDVandDC,people'srequirementsforstoragecapacityhavebecomegreaterandgreater.Whendownloadingmoviesandmusiconline,evenan80Gharddiskisquicklycompressedtoitslimit.Inthisway,usersurgentlyneedaconvenientandeconomicalstoragemethodandmediumtofreeupmorespaceontheharddisktoremembernewthings.Inthepast,anordinaryCDburningdisccanstoreabout700MBofdata,whichcanbasicallysolvetheneedformassstorage.ThecapacityofanordinaryDVDdiscis7timesthatofaCDdisc,whichhasobviousadvantages.Single-sideddouble-layerDVDburningisthelatestDVDmode,anditisalsothefinaltrendoffutureDVDburningdevelopment.Single-sideddouble-layerburningtechnologyexpandsthestoragecapacityofDVDdiscsfrom4.7GBto8.5GB.Theindustrybelievesthattheincreaseincapacityismorepracticalthantheincreaseinburningspeedalone.

Operationpanel

Thecharacteristicsofthefrontpanelrefertotheopeningbutton,CDplaybackbutton,volumeadjustment,headphonejack,andmandatoryWaitforapopup.Althoughsuchsubtletiesarenotcommonlyused,theycanbringalotofconveniencetousersandaredetailsthatusersshouldpaymoreattentionto.

Firmwareisthesoftwarethatissolidifiedinthehardware.TheopticallystoredFirmwareisthesoftwareinstructionsetrunningonthedrive.Itstoresthemostbasicparametersofthehardwaredevicesinthecomputersystemandprovidesthesystemwiththelowestlevel,Themostdirecthardwarecontrol.FirmwareissimilarinfunctiontotheBIOSonthemotherboard.Also,duringthebootprocess,thesystemfirstreadsitsinternalhardwaredeviceinitializationinformation,sothattheoperatingsystemcancorrectlyidentifythehardwareandprovidethemostbasicbasisfortheoperationofothersoftware.SomemanufacturerswillalsostorethedataofvarioustypesofdiscsonthemarketintheFirmware,mainlytheFirmwareoftherecorderstorestheinformationoftheburneddisc,detectstheinformationofthecurrentlyuseddiscduringburning,comparesitwiththestoreddata,andthenadoptsthecorrespondingBurningmethod.

Firmwareisstoredinthehardware.ItsstoragemediamainlyincludeROM,PROM,EPROM,EEPROMandFlashRom.OpticalstorageproductsbasicallyuserewritablestoragemediatostoreFirmware,whichisconvenientforuserstorefresh.FlashRomisanon-volatilestoragemediumimprovedonthebasisofEEPROM.Ituses"block"astheunitwhenerasingdata.Thesizeoftheblockisdeterminedbythemanufacturer,whileEEPROMisbasedonbytes.Itiserasedfortheunit,soFlashRomhasafastererasingspeed,anditsadvancedtechnologyandconvenientoperationareveryconvenientforuserstoupgradethefirmwarebythemselves.Thespecificstoragemediausedbyequipmentmanufacturersareoftencomprehensivelyconsideredbasedonactualconditionssuchasmanufacturingcosts,safetyperformance,whethertoupgrade,andthedevelopmentandchangesofequipmentstandards.

TheimportanceofFirmwareisself-evident.Theuseoferasablemediaistoupgradeit.Manufacturerscanprovidefirmwareupgradesinordertoaddmorefunctionstothefirmwareorimproveitsperformance,orevencorrectitserrors.Althoughsomefirmwareproblemscanberemediedbysoftwarepatches,itisnotasreliableandconvenientastodirectlyupgradethefirmware.Therefore,whenmanufacturerslaunchhardwareproducts,theyalladoptanupgradeablefirmwaredesigntoprovidemoreflexibleapplicability.

Generalopticalstoragemanufacturerswillprovidethenecessaryfirmwareupgradeprogram,whichcanbedownloadeddirectlyfromtheirofficialwebsite.Thecapacityofsuchprogramsissmall,generallywithinoneortwohundredKB.MostfirmwareupgradeprogramsneedtoberuninapureDOSenvironment.NotethatitdoesnotrefertotheDOSwindowunderWindows,buttheDOSoperatingenvironmentbeforeenteringtheWindowsinterface.

Tips

1.Adjustpower.

Ifpossible,youcandisassembletheopticaldrive,findtheknobtoadjustthelaseremissionpower,anduseasmallflat-bladescrewdrivertoadjustthepowerrepeatedlyuntilitcanbeburned.Notice!Iftherearenoconditions,skipthisstep,next.Don'tfumbleblindlywithoutauthorization,otherwiseyouwillbeatyourownrisk.

2,cleanthebaldhead.

Spend10yuantobuya"VCDcleaningdisc"atastreetaudioandvideostore,suchasthe"SihaiAudioandVideoVCDCleaningDisc",whichisascleanasaDVD.Usethelow-gradeindustrialalcoholthatcomeswiththecleaningdiscandapplyittothebrushofthecleaningdisc.ThenputitintheCD-ROMdriveandletitplayseveraltimes.Thecleaningdiscwillbecleanedwhileplacingit.Itisadvisabletowashitthreetimes,asithurtsthebaldheadmore.Thesethreetimesarealsointhecaseofreallynotbeingabletocarveoutthedisc.

3.Payattentiontocoolingdowninsummer.

EspeciallywhentheDVDburnerburnsathightemperatureforalongtime,ithurtsthebaldheadverymuch.Thebaldheadmayevenbeburntanddeformed,whichmeanssuicide.Whenmyrecorderwasdying,inordertoensurethequalityoftheburneddiscs(thedatalayerwasdeepandthestoragetimewaslong),IhadtouseanelectricfantoblowtheinsideofthechassiseverytimeIburnedadisctothemaximumlevel.Becausemyserverisliketurningonanelectricheaterwhenitworks,andit'sinthesummer.Ifeelhotsittingnexttothecomputer,letalonetheburnerinsidethecase.Thisisalsoastressfultestforit.

4.Changethedisc.

Usehigh-qualitybrand-namediscswithhighreflectivity,suchasPioneerPioneer,Verbatim,Mitsubishi,TDK,etc.

5.Burnatlowspeed.

Themostcommonlyusedare4Xburndisks,itdoesn'tmatter,wewillconsumemoretoensurethesuccessrate.Ifyoucan’tplaywith4X,let’s2X.

6.Others

Ifalltheabovemethodsarenotreliableforyou,thenyoucanusetheDVDburnerasaCDburner.BecausethelifeofyourDVDburnerisreallyattheend,youwillnotevenbeabletoreadtheDVDafterawhile.

FrequentlyAskedQuestions

HeatDissipation

Whenalotoffriendsbuycomputerstosavecosts,theychooseinferiorchassis.Thechassishasseriousheatdissipationproblems.Theopticaldrivewillgeneratealotofheatwhenreadingthedisc,whichwillcausetheburningfailureortheinabilitytoreadthediscforalongtime.Ontheotherhand,theinstallationoftheopticaldriveisnotcorrect.Whenusingdualopticaldrives,putthetwoopticaldrivesfirmlytogether.Itseriouslyaffectstheheatdissipationoftheopticaldrive,andthelong-termworkingcapacitycausesthepoorheatdissipationoftheopticaldrivetocausetheelectronicboardtooverheatandburn,whichseriouslyaffectstheservicelifeoftheopticaldrive.

Cleaningproblem

Thecleaninginsidethecaseisnotinplace,andalargeamountofdustcoverstheopticaldrive,whichseriouslyaffectstheheatdissipationoftheopticaldrive,andcausestheopticaldrivetocrashduetopoorheatdissipation.

Otherissues

Inadditiontotheaboveheatdissipationissues,someincorrectusecanalsocausefailuretoreadandwrite.

1.SomeoldermotherboardshavesomeproblemswithACPIpowermanagement.Sometimesthesoftdecompressionsoftwarecannotdisablethescreensaver,sleepstate,etc.,sothesystemcrasheswhenitentersthepower-savingstate.

2.Runmanyprogramsatthesametimeorevencross-usesoftdecompressionsoftwaretomakethesystemresourcestoolowandcausethesystemtocrash.

3.SomeVIA/SISchipsetmotherboardsareinstalledwithIDEdriversthatareolderornotverycompleterelativetothesechipsets.CausetheCD-ROMdrivetocrashinDMAmode.

4.Thesurfaceofsomediscsisnotflat,becauseeverypointontheringunderthesameradiusisnotonthesameplaneorunderthesameradius,everypointonthisradiusisnotonthesameplaneTheabovecausestheCD-ROMdrivetofailtoreadwhenitreadsacertainsector.

5.ACPIadvancedpowermanagementissues:duetosoftwarebugs,chipsetfeatures,BIOSwriting,STRandotherissuescausedbyacertainsystemcondition,powerusage,triggertiming,etc.Unreasonablecrashes.

ThesolutionistoinstallacleanoperatingsystemandprohibittheuseofACPIbeforeinstallation,ordisablealloptionsrelatedtotheharddisk,monitorshutdown,sleep,etc.inthepowermanagementoftheoperatingsystem.