Please click the section title to open / close a particular section. Truncation will cause incremental and/or differential backups of Microsoft SQL Server, Exchange, and SharePoint to fail as described in Databases and Multiple Backup Applications.Truncation can affect the ability to perform backups of these databases from within the child VM. Truncation will occur during both Saved State and Child Snapshot backups.Truncation will occur as a part of both full and incremental backups.If Microsoft SQL Server, Exchange, or SharePoint is running on a Virtual Machine, then transaction logs for those databases will be truncated when a Hyper-V backup occurs.This method is used if the Child VM Snapshot method cannot be performed.Once the snapshot is taken, the VM is returned to its previous state. Saved State – This method briefly places each VM into a saved state so that a snapshot can be taken.Child VM Shapshot backups have additional requirements, as outlined in the collapsible section below.If a Child VM Snapshot cannot be taken, a Saved State backup is taken instead. This allows the VM to be backed up without forcing it into a saved state. Child VM Snapshot – This method uses the Volume Shadowcopy Service (VSS) inside a child VM.VMs are backed up by one of two methods.A virtual machine should not be backed up in more than one backup set.If there are multiple Hyper-V backup sets configured within CSSB, they can run simultaneously, but should be started at least one minute apart to allow time for VSS Snapshot creation.Selecting one of a virtual machine’s associated VHD files will select all others automatically. While all virtual hard disk (VHD) files associated with the virtual machine will be displayed, you cannot choose individual VHD files.When selecting VMs individually, VMs are not automatically added or removed from the backup.Virtual Machines may be selected for backup individually.With all VMs selected, VMs that are removed from Hyper-V will be automatically removed from the backup.With all VMs selected, newly added VMs will be automatically detected and backed up.All Virtual Machines in Hyper-V may be selected.The Initial Store (InitialStore.xml) is always backed up and will not appear in the "Backing Up" list.Solution: Considerations for Hyper-V Backups Differential backups are not supported on any platform. Incremental backups are supported on Windows Server 2008 R2 and higher. Hyper-V backups support full backups on Windows Server 2008 and higher. Servers in core configuration are not supported. Carbonite Safe Server Backup (CSSB) supports backup and restore of virtual machines hosted by Hyper-V server installations on Windows Server 2008, Windows Server 2012, Windows Server 2016 and Windows Server 2019.
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