Dell PowerVault TL2000 - Page 9

DellPowerVault™TL4000/TL2000FailoverGuide
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9|Page 12/31/09 version 2.0
MainPath
Failover Path
MultipleHostFailoverconfiguration
(twohosts,twoFCswitches,and2FCdrives)
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Figure5:ReferenceConfiguration5
NotethataSANenvironmentissusceptibletobackupperformanceissuesduetothesharingof
resourcesacrossmultiplehosts.Afailovereventinthesystemcanpotentiallycomplicatethe
performanceissues.Failoverisameanstomaintainthedatastorageflowintheeventofafailurealong
thecommunicationpathbetweenthehostandthedriveorlibrary,buttheenvironmentmanagermust
monitorthestateofthesystemtoensureallthepathsareactive.
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FailoverReferenceConfiguration6:
OnehostwithdualportSASHBAandoneDellPowerVault™withasingleSASdrive
Inthisconfiguration,failoveroccursonlyifoneoftheHBAsfails.Thisconfigur ationonlysupportsdata
pathfailoverasthereisnoseconddrivetofailoverthecontrolpath.Thephysicalconnectionofthis
configurationisshowninFigure6.
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Alwaysrefertowww.dell.com\supportforlatestdocumentationandupdates
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