Hyper-V Storage considerations for Backup Strategy
As you plan your backup strategy, consider the compatibility between the storage and backup solutions:
· Virtual hard disks. These offer the best compatibility and can be stored on many types of physical media. For more information about the types of storage you can use with Hyper-V, see Hardware Considerations.
· Physical disks that are directly attached to a virtual machine. These disks cannot be backed up by the Hyper-V VSS writer. As a result, this type of disk will not be included in any backup performed by a backup program that uses the Hyper-V VSS writer. In this situation, you would need to use some other process to back up the physical disk, such as running a backup application within the guest operating system.
· iSCSI-based storage. This storage is supported for backup by the Hyper-V VSS writer when the storage is connected through the management operating system and the storage is used for virtual hard disks.
· Storage accessed from a virtual machine by using an Internet SCSI (iSCSI) initiator within the guest operating system. This storage will not be included in a backup of the physical computer. In this scenario, you must use another process to back up the data from the iSCSI-based storage before you perform a full server backup. For example, you could run a backup of the data on the iSCSI storage from a backup application running in the guest operating system.
For more information about deploying storage for Hyper-V, see Implementing Disks and Storage.