ISO IEC 29121-2021.docx

INTERNATIONA1.STANDARDISO/IEC29121editionFurth202101Informationtechno1.ogyDigita1.1.yrecordedmediaforinformationinterchangeandstorage-Datamigrationmethodforoptica1.disksfor1.ong-termdatastorageTechno1.ogiesdeinformationSupportsenregistresnumeriquementpourechangeetstockaged,informationMethodedemigrationdedonneespourdisquesOPtiqUeSpourIestockage1.ongtermeReferencenumberISO/IEC29121:2021(E)COPYRIGHTPROTECTEDDOCUMENT©IS0/1EC2021M11c<hefivdi1.itedotherwise*ri快ChBxXniEX1.msitRiDhmw;Itmiihr<1.ij1.trfvx>CoPwnR.pnttjuiionpostingontheinternetoranInunnu1.withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOatt1.½addressbe1.oworISO*smemberhodyinthecountryofth<?rrcucstcr.三cB1.andonnct8r,GenevaPhone:t41227490111辆jtc:用洲部砾o.orgPub1.ishedinSwitzer1.andForewordISO(theInternationa1.OrganizationforStandardization)andIEC(theInternationa1.E1.ectrotechnica1.(ironnwm&MiJform1.SOthjififiqJatemtfd1.bp1.entstartiBtdraatua1.NStmmitteesestab1.ishedbytherespectiveorganizationtodea1.withparticu1.arfie1.dsoftechnica1.activity.ISOandIECmitteesco1.1.aborateinfie1.dsofmutua1.interestOthernj11adonaramationsrgovernmenta1.andnon-governmenta1.,in1.iaisonwithISOand1EC,a1.soTheproceduresusedtodeve1.opthisdocumentandthoseintendedforitsfurthermaintenanceare咽的阳Hg节es1.9tfIBMn映丽阂屈.p副m四三鞭翻魏酮双斑i&ord麻崛edcdtheeditoria1.ru1.esofthe1SOIECDirectives.Part2(seewww.iso.org/direc1.ives).曲蹴的ig袒Wn用瓶邺8蝴阳瓶怅陆帆牌脾精McW¾y徜物匐海Ubjeetrights.Detai1.sofanypatentrightsidentifiedduringthedeve1.opmentofUBdoan>tWR1.beintheIntroductionand/orontheISO1.istofPaWHuk÷kw4kmsreceived(seeWWW.iso.org/ts)ortheIEC1.istofpatentdec1.arationsreceived(seePaterHSjeCCh).nytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.tp侬SiOnSeX附ChMbNt由BmbWW麴挽侬nenpa蜒HhdardS,thft11他ningfoutISBpQdiiettitt皿hmdWoHd5粒O削nization(VVrTO)princip1.esintheTechnica1.BarrierstoTrade(TBT),seewww.iso.org/iso/foreword.htm1.眼gftft¼!WSCv伊咽ifr招岫mKa1.附飒1即硫初；Wn皿2techno1.ogy.Thisfourtheditioncance1.sandrep1.acesthethirdedition(ISO1EC29121:2018),whichhasbeentechnica1.1.yrevised.Themainchangescomparedtothepreviouseditionareasfo1.1.ows: ISO/IEC16963hasbeenidentifiedastherefereetestmethodforthe1.ifetimeestimation; theambientconditionsforthemeasurementofmaximumdataerrorhavebeenadded; therequirementsfortestdriveshavebeenchangedconsideringtheuseconditionofusers; therequirementsfortheestimated1.ifetimehavebeendefinedmorec1.ear1.y; therequirementsfortheperiodicperformancetesthavebeendefinedmorec1.ear1.y.AnyfeedbackorquestionsonthisdocumentShCHIkibShUEer1.naHona1.standardsbody.Acomp1.ete1.istingofthesebodiescanbefoundatwww.iso.org/members.htrn1.Introductiondiskse1.ectedthatrecordingbeenrecordedcorrect1.yandremainspurpose.ItisthereforeimportanttobeIxongevityverified1.iniitedassurethatdeteriorationexistingtechno1.ogyobso1.escence.recoverab1.e.SupportConsequentIy,recordingsbetween5andIongeryears,cyc1.etechno1.ogy1.ifetransferredendupgradedOptica1.disksfor1.ong-termmanufacturersshou1.deva1.uated.Significant1.ongevitymanufacturer,existthresho1.dinitia1.1.ypoorschedu1.edinspec1.ion.suffidentheadroomavodedcanfor1.ongtermunrccoverab1.eerrorBecausedetectingarecorrectedbyrateerrorcorrectiondecoder,Theisirnpossib1.crneasureddeteriorationDVD-R,Deterioration*RWmonitoredqua1.itycheckingDVD-RAMdiskandContinuesinsteadmonitored.DVD-R,DVD-RW,ThisDVD-RAMjheand÷RWdisksdiodes,twothetechno1.ogysubstratesbondedtogetherbetweenrequiredUsedprofessiona1.thosepreservation.conventiona1.havingdua1.recording1.ayerswithaspacerinc1.uderecordab1.eandrecordab1.edisksrewritab1.epub1.ishedin2013.According1.y.16963WorkvvasstaFtedupdatedtoincorporated.StandardofCD-RjneasurcdBDrecordab1.eerror-correctionrewritab1.eapp1.iedisa1.sodefinedineachManyorganizationsnowuseoptica1.disksfor1.ong-termstorageofinformation.Itisassumedthataab1.etoverifyfordatahavehasa1.readybeenqua1.ifiedforthatreadab1.erequiredamountof即胧/褪丫帆s_J(g册田也煦辩andardsc1.ear1.ydefinedrequirementsforinterchange,buttheydidnot,containrequirementsfor1.ongevity.regu1.ar1.yistobothbydiskinformationandbyrecordeddiskswi1.1.continuetobe!nterchangei:Userscanhaveamaintenancepo1.icythatprotectsdisksagainstunanticipatedfai1.ureoruse,suchasbymakingonecopy,anothertofunctionasabackupormasterandanotherforroutineaccess.Hardwareyears,1.ifecyc1.estypica1.1.yvarythatrequire10Iifeandcanhavetobecyc1.esusua1.1.ytoafter20p1.atformsevery10to30years.fordisksfromdifferentstorageandbeevenbetweendisksfromthesamedifferencesItpreferab1.ethatdisksse1.ectedfor1.ong-termpreservationhavea1.ong-estimated1.ifetime,whichcanbeestimatedaccordingtoISO)EC16963.DisksWi1.hbcforcthenextqua1.itydoofferwhichistobeandreachthedatastorage.Thismeansthatadisk