Hyper-V terminology related to backup
The following table describes the Hyper-V terminology that is related to backup.
Table: Hyper-V terminology related to backup
Term | Description |
|---|---|
avhd, avhdx file | A snapshot file that Windows Hyper-V creates, for point-in-time recovery of the virtual machine. See Basic phases in a NetBackup backup of a Hyper-V virtual machine. |
Common vhd, vhdx files | Refers to a virtual disk (vhd or vhdx file) that contains the files that multiple virtual machines require. Instead of copies of the same file existing at multiple places, the virtual machines share a single vhd or vhdx file (the parent). |
CSV | A cluster-shared volume in a failover cluster. Refer to your Microsoft documentation for more details regarding CSV. |
Differencing disk | A 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 physical drives. This mechanism enables common files to be shared across virtual machines. |
Windows Server Failover Cluster | A Windows Server Failover Cluster (WSFC). |
HA (high availability) | Describes a virtual machine that is configured in a cluster. If the virtual machine's Hyper-V host goes down, the virtual machine automatically moves to another Hyper-V host in the cluster. Users perceive little or no downtime on the virtual machine. Refer to your Microsoft documentation for more details. |
Pass-through disk | 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 in vhd or vhdx format. |
vhd, vhdx file | A 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-V supports several kinds of these files, such as fixed, dynamic, and differencing. Refer to your Microsoft Hyper-V documentation for more information. |
Virtual machine configuration files: xml, bin, vsv, vmcx, vmrs | NetBackup 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 machine GUID | A globally unique identifier of the virtual machine. In an SCVMM environment, the VM GUID is referred to as the VM ID. |