See about restoring common files on page 128common

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See“About restoring common files”on page 128.Common vhd, vhdxfilesA cluster-shared volume in a failover cluster. Refer to your Microsoft documentation for moredetails regarding CSV.CSVA differencing disk is in a child relationship to the parent disk (see common vhd, vhdx files).The parent and child virtual disks may be on the same physical drive or on different physicaldrives. This mechanism enables common files to be shared across virtual machines.Differencing diskA Windows Server Failover Cluster (WSFC).Windows ServerFailover ClusterDescribes a virtual machine that is configured in a cluster. If the virtual machine's Hyper-Vhost goes down, the virtual machine automatically moves to another Hyper-V host in thecluster. Users perceive little or no downtime on the virtual machine. Refer to your Microsoftdocumentation for more details.HA (high availability)Any disk that the Hyper-V server can access. It can be locally attached to the Hyper-V server,or on a SAN. The pass-through disk is attached to a virtual machine, but the disk is not invhd or vhdx format.Pass-through diskA file in a Windows Hyper-V installation that contains the virtualized contents of a hard disk.The vhd or vhdx files can contain an entire virtual operating system and its programs. Hyper-Vsupports several kinds of these files, such as fixed, dynamic, and differencing.Refer to your Microsoft Hyper-V documentation for more information.vhd, vhdx fileNetBackup backs up these files as part of a full virtual machine backup.The bin and the vsv files are visible only when the virtual machine is running.The vmcx files and vmrs files are for VM configuration versions later than 5 (Hyper-V 2016).Virtual machineconfiguration files:xml, bin, vsv, vmcx,vmrsA globally unique identifier of the virtual machine.In an SCVMM environment, the VM GUID is referred to as theVM ID.Virtual machine GUID13IntroductionHyper-V terminology related to backup
Basic phases in a NetBackup backup of a Hyper-Vvirtual machineThe following tables describe the phases of the NetBackup backup process for thetwo Hyper-V backup methods: VSS and WMI.Table 1-3VSS backup method: Phases of NetBackup for Hyper-V backupDescriptionPhaseThe NetBackup master server initiates the backup.Phase 1The NetBackup client on the Hyper-V host initiates a snapshot.Phase 2On Windows 2012 hosts and earlier: The VSS Hyper-V writer quiesces the Windows virtual machine(places the data in a consistent state) and creates the snapshot on the host volume. If the Hyper-V writercannot quiesce the virtual machine, the virtual machine is placed in the Saved state before creation ofthe snapshot.On Windows 2012 R2 hosts and later: The Hyper-V writer quiesces the Windows virtual machine andcreates a.avhdor.avhdxsnapshot on the host volume. The following Microsoft article contains moredetails on Hyper-V backup on 2012 R2 hosts:How Hyper-V Backup Got Better in 2012 R2Phase 3On Windows 2012 hosts and earlier: If the virtual machine was placed in the Saved state, Hyper-V returns

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