DellMultiUPSManagementConsoleUSERGUIDEDell.comDellMUMC–UserGuideP164000119Rev0.0313BAPPENDIX3:Configuringmaintenancemodeandlivemigrationwith scvmm5214. APPENDIX3:CONFIGURINGMAINTENANCEMODEANDLIVEMIGRATIONWITHSCVMM14.1. MAINTENANCEMODEInVirtualMachineManager(VMM)2008R2,youcanstartmaintenancemodeforavirtualmachinehostanytimethatyouneedtoperformmaintenancetasksonthephysicalhost,suchasapplyingsecurityupdatesorreplacinghardwareonthephysicalhostcomputer.WhenyoustartmaintenancemodeonaWindowsbasedhost,VMMautomaticallydoesthefollowing: Onastandalonehost,placesallrunningvirtualmachinesintoasavedstate. OnaWindowsbasedhostclusterthatiscapableoflivemigration,givesyoutheoptiontodooneofthefollowing:o Livemigrateallrunninghighlyavailablevirtualmachinestootherhostsinthecluster,andplaceanyrunningvirtualmachinesthatarenothighlyavailableinasavedstate.o Placeallrunningvirtualmachinesintoasavedstate.(PleaserefertoMicrosoftuserdocumentationlistedinAppendix5VMwarereferences)14.2. WHATISLIVEMIGRATION?LivemigrationisaHyperVfeatureinWindowsServer2008R2,whichrequiresthefailoverclusteringfeaturetobeaddedandconfiguredontheserversrunningHyperV.Livemigrationallowsyoutotransparentlymoverunningvirtualmachinesfromonenodeofthefailoverclustertoanothernodeinthesameclusterwithoutadroppednetworkconnectionorperceiveddowntime.Inaddition,failoverclusteringrequiressharedstoragefortheclusternodes.ThiscanincludeaniSCSIorFiberChannelStorageAreaNetwork(SAN).Allvirtualmachinesarestoredinthesharedstoragearea,andtherunningvirtualmachinestateismanagedbyoneofthenodes.(PleaserefertoMicrosoftuserdocumentationlistedinAppendix5VMwarereferences)14.3. CONFIGURATIONTESTTotesttheinstallation,pleaseperformapowerfailureontheUPSandcheckonSCVMMconsolethatthecorrespondingHyperVhostentersinMaintenancemodeafterthe“Maintenancemodetimer”.HyperVmachineshavetobestartedbeforethemachinethatishostingtheSCVMM.SCVMMserviceneedssometimetorefreshitsstatus.Ifthestartingsequenceisnotcorrect,theHyperVwillstayinMaintenancemode