1、NetAppsE-SeriesStorageSystemEnterprise99.999%AvailabilityEachyear,informationbecomesmoreandmorevitaltoacompanyssuccess.Andintodaysglobalmarketplace,accessingandprotectingthatinformation24x7iscrucialtoacompanysfuture.Designedtodeliverindustry-leadingperformanceand99.999percentdataavailability*,theNet
2、AppE-Seriesstoragesystemsareperfectlysuitedforyourbusiness-criticalapplications.99.999%DataAvailabilityMoststoragesystemsprovidearequiredsetofhighavailabilityfeaturessuchasautomatedI/Opathfailover,redundantcomponents(controllers,powersuppliesandfans),RAIDprotection,globalhotsparesandmirroreddatacach
3、ewithbatterybackup.Differentiationcomesfromtheadditionalaspectsofthestoragesystemdesignthatcansignificantlyimprovedataavailability,integrityandprotection.TheE-Seriesstoragesytemsgoesaboveandbeyondthebasichighavailabilityfeatureswithtechnologiessuchasproactivemonitoring,backgroundrepair,advancedprote
4、ctionandextensivediagnosticfeatures.ThisuniquecombinationoffeaturesandtechnologiesenablestheE-Seriestodeliverenterprise-class99.999percentavailabilityforuninterruptedaccesstodata.ProactiveMonitoringtoIdentifyIssuesBeforeTheyBecomeProblemsHavingadisasterrecoveryplanisimportant,butavoidingdisastershou
5、ldbetheprimarygoal.RAIDprotectsdatastoredonanindividualdiskdriveintheeventthatthedrivefails,butwhywaitforafailuretoknowthedrivewashavingtrouble?ThereareseveralwaystheE-Seriesmonitorsthehealthofadiskdriveanddetermineswhencorrectiveactionsneedtobetakenbeforethedrivefails-proactivelyprotectingyourdata.
6、CorrectingunrecoverablereaderrorshasbecomeaseamlessprocessfortheE-Series,andismostoftenoccurringundetectedbytheapplicationoradministrator.Leftunchecked,however,adrivecanbecomedegradedovertimeduetotoomanyrecoveries,Inmostcases,drivesshowwarningsignsbeforefailing,butnotallstoragesystemsarelookingforth
7、em.Inanefforttoidentifydriveswithdevelopingreliabilityproblems,theE-Seriesoffersindustry-uniqueproactivedrivehealthmonitoring.Inadditiontotrackingthedrive-reportedSMARTdata,theE-SeriesexamineseverycompleteddriveI/Oandtrackstherateofdrivereportederrorandexceptionconditionsreturnedbythedrives(inthefor
8、mofsensekeys),aswellasdriveperformancedegradationoftenassociatedwithunreportedinternaldriveissues.Utilizingpredictivefailureanalysistechnology,whenanyerrorrateordegradedperformancethresholdisexceeded-indicatingadriveisshowingsignsofanimpendingfailure-theE-Serieswillissueacriticalalertmessageandtakea
9、nycorrectiveactiondeemednecessaryandsafetoprotectyourdata.Inadditiontodrives,theE-SeriesIOpathsarecontinuallymonitored.IOpathsthatrequireabnormalretryactivitiesaremarkedasdegradedandIOsarediscontinueddownthatpath.TheadministratorisalertedtothisconditionandrepairscanbemadeonthedefectiveIOpath,assurin
10、gcontinuedavailability.Additionally,performanceisoptimizedasthecontrollerdoesnotspendtimeattemptingIOsonthepaththatisfailing.BackgroundOperationstoDetectandRepairDriveErrorsWhenabaddatablockisdiscoveredduringareadoperation,mostenterprise-classstoragesystemsuseredundancydatatorecreatetheulostdataonth
11、efly.EncounteringoneoftheseUncorrectableerrorsduringafailed-drivereconstruction,however,canbeadisaster.TheE-Series,user-initiatedbackgroundmediascansproactivelycheckdrivesfordefectsandinitiaterepairsbeforetheycancauseproblems.Thisincludesrewritingsectorsthatmaynothavebeenproperlywritten,reallocating
12、defectivesectors,andfindingandrepairingparityinconsistencies.AdvancedProtectionFeaturesEnsureDataIntegrity,Security,andAvailabilityWhendataistrustedtoyourstoragesystem,protectingitsintegrityandsecurityisvital.TheE-Seriesprovidesseveralkeytechnologiesthatgoaboveandbeyondthecapabilitiesofotheroffering
13、s.Forinstance,theE-SeriescanprovideanadditionlevelofdataintegrityverificationbyusingRAIDredundancyinformationtoperformafinalvalidationcheckbeforereturningtherequestedinformationtothehostapplication.Securingvaluabledataisoftenequallyimportant.Diskdriveswill,eventually,beoutofauserscontrol-eitherthrou
14、ghoff-siteservice/repair,theft,orwhensimplytryingtodisposeofolddrives,TheE-Seriesencryptionservicescombineslocalkeymanagementanddrive-levelencryptionforcomprehensivedatasecuritythatensuresdataissecuredthroughoutthedriveslifecyclewithoutsacrificingstoragesystemperformanceoreaseofuse.Evenwithproactive
15、monitoring,adrivecanfailwithoutwarning.Andwhenanunrecoverablemediaerrorisdetectedduringadriverebuild,mostsystemswillloseallofthedataonentiredrivegroup.TheE-Seriesincludesapatentedsoftwarealgorithmtolimitthedatalosstothestripewiththeunrecoverablesectors-preservingtherestofthedataonthedrive.Thiscanall
16、owtheadministratortouseavailableapplicationandfilesystemtlstorecoverdata.Whenthisisnotfeasible,onlytheaffectedLUNneedstoberestoredfrombackup.AdvancedDiagnosticsEnableTimelyProblemResolutionRedundantcomponentsensuredataisaccessiblewhencomponentsfailorbecomedegraded.Thelongerittakestoidentifyanddiagno
17、seafailureorproblem,however,thelongertheoverallstoragesystemperformanceisdegradedanddataavailabilityisatrisk.TheE-Seriesprovidesinstantnotificationsoffailingdevicessothattheycanbequicklyandefficientlyreplacedorrepaired.Additionally,theE-Seriscollectsextensivediagnosticandstatisticdatatoprovidecompre
18、hensivefaultisolationandsimplifyanalysisofunanticipatedevents.ItsCaptureAllSupportData(CASD)commandprovides15differentdiagnosticandlogoutputsinasinglepackageforthesupportteam.Thisensuresthesupportteamhastheinformationneededtoresolveunanticipatedissuesinatimelymanner.ReplicationServicesAretheFinalSaf
19、eguardSitedisastersrangeinscale(fromusererrorstobuildingfires),buthavesimilareffects-dataislost.Thecriticalityofthedatadictatesitsrecoverypointobjective(RPO)andrecoverytimeobjective(RTO).TheE-Seriesprovidesmultiplereplicationoptionsdesignedtoprotectagainstarangeofdisastersandensuredataisbackonlineas
20、quicklyaspossible.Localreplicationfeaturesprotectagainstaccidentlydeletedfilesanddatacorruption,whileremotemirrorsduplicateprimary-sitedatatoanoff-sitelocation.ConclusionUninterruptedaccesstoinformationanditsunwaveringprotectioniscriticaltoacompanyssuccess.TrustingyourvitaldatatotheNetAppE-Seriessto
21、ragesystemsensuresthehighestlevelsofavailability,integrity,andsecurity.*CalculationsarebasedonthoseusedinBellcoreReliabilityPredictionProcedureforElectronicEquipment(TechnicalReferenceTR-000332,usingcalculationMethod1,Case3,Issue6,December1997).2013NetApp,Inc.Allrightsreserved.Noportionsofthisdocume
22、ntmaybereproducedwithoutpriorwrittenconsentofNetApp,Inc.Specificationsaresubjecttochangewithoutnotice.NetApp,theNetApplogo,andGofurther,fasteraretrademarksorregisteredtrademarksofNetApp,Inc.intheUnitedStatesand/orothercountries.Allotherbrandsorproductsaretrademarksorregisteredtrademarksoftheirrespectiveholdersandshouldbetreatedassuch.
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