E2KRecovery文档格式.docx
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E2KRecovery文档格式.docx
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Windows
2000BackupUtility(NTBackup.exe)2
BackingUpMultipleDatabases3
Exchange2000ServerClusters3
BackingUpExchange
2000ServerInformation3
CreatingaBackupPlan3
RecommendedBackupDeployment6
RecoveringfromDisasters7
LevelsofDisasterRecovery7
RestoringMailboxes7
RestoringOneorMoreExchangeDatabases7
RestoringMultipleDatabasesinaSingleStorageGroup8
FullServerRecoveries9
DisasterRecoveryforMicrosoftExchange2000Server
Forthelatestinformation,see
Introduction
Yourcompanycanpreparetorecoverlostdatabydevelopingandimplementingawell-plannedbackupstrategy.TorecoverMicrosoft®
Exchange
2000Serverdata,youmustunderstandboththeMicrosoftWindows®
2000ActiveDirectory™directoryserviceandthearchitectureofExchange
2000databasetechnology.Ifyoualsounderstandtransactionloggingandhowdatabase,checkpoint,andlogfilesrelatetoeachotherinpreviousversionsofExchange,youwillbeabletousetheseconceptsinExchange
2000.TroubleshootingprinciplesandstrategiesbetweenpreviousversionsofExchangeandExchange
2000arealsosimilar.
AlthoughfamiliaritywithproceduresusedtobackupandrestorepreviousversionsofExchangeprovidesagoodfoundation,youwillneedtolearnnewprocessesforExchange
2000.Forexample,theMicrosoftExchange
5.5databaseiscontainedinasinglefile,whereastheExchange
2000databaseiscontainedintwolinkedfiles(database.edbanddatabase.stm).Forbackupandrestoration,thesetwofilesmustalwaysbetreatedasonefile.Also,theESEUTILorISINTEGscriptsthatyouruninExchange
5.5donotworkinExchange
2000.
ThisarticledescribessomeofthemostimportantaspectsofExchange
2000disasterrecovery.WhetherornotyouarefamiliarwithbackingupandrestoringExchange
5.5,reviewthefollowingdocumentationsourcestohelpyoumaximizeyourunderstandingandyourabilitytorecoverfromdisastersthatmightoccur:
The“InformationStore”and“BackupandRestore”chaptersofMicrosoftExchange2000ServerPlanningandInstallation
WhitepapersonExchange
2000disasterrecoverywrittenbyMicrosoftProductSupportServices(PSS),whichareavailableontheExchangeWebsite:
MicrosoftExchange
2000Serveronlinedocumentation
ServersrunningpreviousversionsofExchangehavetheirowndirectorydatabases,whicharereplicatedonotherserversonthesameExchangesite.Bycontrast,Exchange
2000serversuseWindows
2000ActiveDirectory.ActiveDirectoryreplicatesExchangemailboxandconfigurationinformationthroughoutanentireWindows
2000forest.
ConnectExchange
2000serverstoWindows
2000domaincontrollersthatrunActiveDirectory.Exchange
2000readsandwritesdirectoryinformationtoandfromActiveDirectoryasneeded.
Note
ForinformationonWindows
2000domaincontrollersandActiveDirectory,seetheWindows
2000documentation.
Thishasthefollowingimportantimplicationsfordisasterrecovery:
ExchangeadministratorsmustnowworkmorecloselywithWindowsadministratorsbecauseActiveDirectoryissharedbetweenthetwo.
ExchangeadministratorsinvolvedindisasterrecoveryrequiresufficientpermissionsinActiveDirectorytoread,write,andmodifyExchangeentries.
Youcannolongerjoinrecoveryserverstoproductiondomains.Ifyouwanttorecoveradamagedmailboxfromadedicatedbackupserver,youmustuseadomaincontrollerthatisisolatedfromyourproductionforest.
ExchangeDatabaseTechnology
UnderstandingtheunderlyingdatabasetechnologyusedbyExchangewillhelpyouunderstandthebackupandrestoreprocess.AnimportantenhancementinExchange
2000istheconceptofmultiplestoragegroupsandmultiplemailboxstoresandpublicfolderstoresineachstoragegroup.Adatabasecontainsdatainamailboxstoreorapublicfolderstore.Youcanbackupandrestoredatabasesinastoragegroupindividuallyortogether.Asinglesetoflogfilescontainsentriesforalldatabasesinthestoragegroup.
Exchangeusesfault-tolerant,transaction-baseddatabasestostoremessagesandwrite-aheadtransactionlogfilestoensurethatExchangedataisefficientlyprocessed.Write-aheadistheprocessofwritingtransactionstotransactionlogssequentiallybeforewritingtheminbulktothedatabase.Thisimprovesperformanceandensuresthatcommittedtransactionsarenotlost,becausecopiesarestoredinthelogfiles.
WithExchange
2000,youcanconfigureuptofourstoragegroupsoneachExchangeserver.Youcanconfigureupto5databasesineachstoragegroup,foramaximumnumberof20databasesonasingleserver.WithpreviousversionsofExchange,onestoragegroupexistsperMicrosoftWebStorageSystemthatcanhaveasmanyastwodatabases(Pub.edbandPriv.edb).OnWebStorageSystem,databasescanbemountedanddismountedindividually.Thisflexibilityallowsyoutorestoreorperformmaintenanceonindividualdatabaseswhileothersarerunning.
2000BackupUtility(NTBackup.exe)
InExchange
2000,youusetheWindows
2000backuputility(NTBackup.exe)tobackupWindows
2000andExchange
2000data.ForgeneralinformationaboutWindows
2000Backup,seetheWindows
2000Serverdocumentation.
Important
DonotusetheversionofNTBackup.exeincludedwithWindows
2000version5.0.2172.1tobackupExchange
2000data.WhenyoubackupExchange,youmustuseWindows
2000version
5.0.2195.1117orlater.BeforeyoubackuporrestoreyourExchangeserverdata,downloadthelatestversionofNTBackupfromtheExchange
2000Website.NTBackup.exeisdiscussedthroughoutthisarticle.
BackingUpMultipleDatabases
YoucanconfigureWindows
2000BackuptobackupallExchangedatabasesonanExchangeserver,oryoucanconfigureittobackupaspecificsetofdatabasesorstoragegroups.YoucanchoosetorestoreallofthemessaginginformationonyourExchangeserverortorestoreanindividualdatabaseorstoragegroup.
Althoughyoucanbackupallofyourdatabasesindividually,itisrecommendedthatyoubackupanentirestoragegroupatonetime.Ifyoubackupdatabasesindividually,youalsobackuplogfilesmultipletimesintheprocess.
WhenyoubackupandrestoreExchange
2000databases,youcannotrunmultiplebackuporrestoreprocessesinasinglestoragegroup.See“RestoringMultipleDatabasesinaSingleStorageGroup”laterinthisarticleformoreinformation.
Exchange2000ServerClusters
Theclusteringprocessallowsyoutomanageagroupofindependentserversasasinglesystem.Theseservershaveindividualmemory,processors,networkadapters,andasharedstoragemedium,forexample,redundantarrayofindependentdisks(RAID).TheclusterofserversmusthaveidenticalprocessorsandthesameamountofRAM.Youconnectthesecomputersbyusinganetworkcablethatputsthemincontinuouscontactwitheachother.Ifaserverfails,theothermembersoftheclustertakeoverthefailedserver’sclients.Whenthisoccurs,thereisabrieftimeduringwhichyouruserscannotconnecttothenetwork.FullExchangeserverfunctionalityresumeswhentheotherclusternodetakesover.
OneormoreExchangevirtualserverscanexistinthecluster,andeachvirtualserverrunsononeofthenodesinthecluster.Exchangecansupportmultiplevirtualserversonasinglenode.Clientsconnecttothevirtualserversinthesamewaythattheyconnecttoastand-aloneserver.
2000ServerInformation
TosuccessfullybackupthedataonyourExchange
2000servers,ensurethatyourbackupplaniscomplete.Defineabackupstrategyandthedatayouneedtobackup,verifytheintegrityofyourconfigurationdata,andconsidertimerequirementsforbackingupyourserverdata.IfyourExchangeserverispartofaservercluster,youalsoneedtoknowhowtobackupdataonaclusterservernode.
CreatingaBackupPlan
Yourbackupstrategydeterminesyourrestorestrategy.Theseoperationscannotbeplannedseparately.Whenyoucreateabackupstrategy,youshouldalsoconsiderthetimeittakestorestore.Makesurethatyouhaveenoughcapacityonyourharddrivetorestoreboththedatabaseandthelogfiles.Afullweeklybackup,plusoneweekoftransactionallogfiles,mightbemorethanyourservercanstore.Thisdependsonhowmanylogfilesaregeneratedduringaweek.Forexample,ifyourservergenerates2,000logfilesinaweek,thisamountsto10GBoflogfilespace,inadditiontothespacerequiredbythedatabase.
BackupTypes
YoucanuseWindows
2000Backuptoperformdifferenttypesofbackups:
full,copy,incremental,anddifferential.Thetypeofbackupyouperformdependsontheimportanceofthedatayoustore.Eachofthebackuptypeshasadvantagesanddisadvantagesintermsofdatastorage,performance,andtimerequirements.Therearetwogeneralbackupmethods:
onlineandoffline.
Consultthewhitepapersavailableatforcompleteinformationonallbackuptypes.Thebackupandrestorewhitepaperswillhelpyouunderstandhoweachbackuptypeworks.TheywillalsohelpyouselectappropriatebackuptypesforyourExchangeorganization.ThefundamentalprinciplesofthevariousbackuptypeshaveremainedconsistentamongpreviousversionsofExchangeandExchange
2000.
OnlineBackups
Anonlinebackupallowsthedatabasetocontinuerunningwhileyouarebackingupdata.Theadvantageofanonlinebackupisthatusersarenotaffecte
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