Once you complete these steps, you'll have created a VHD that you can then set up and use with any compatible version of Windows. Using the above steps, you created a VHD, but it's empty without any data or file system.
To make it useful, you need to initialize the disk, create a partition, and format the drive using these steps:.
Right-click the newly created drive button on the far-left side, and click the Initialize Disk option. Right-click the Unallocated space, and select the New Simple Volume option. Under the Format this volume with the following settings section, make sure to use the following options:.
If you're creating a VHD for another device, or you're storing the file on an external hard drive, you'll need to know the steps to properly attach and detach the virtual drive.
Virtual Disk Types There are considerations for using virtual disks, and what types of virtual disks are available: Fixed —The VHD image file is pre-allocated on the backing store for the maximum size requested. Expandable —Also known as 'dynamic', 'dynamically expandable', and 'sparse', the VHD image file uses only as much space on the backing store as needed to store the actual data the virtual disk currently contains.
When creating this type of virtual disk, the VHD API does not test for free space on the physical disk based on the maximum size requested, therefore it is possible to successfully create a dynamic virtual disk with a maximum size larger than the available physical disk free space. For more information, see ExpandVirtualDisk. Note The maximum size of a dynamic virtual disk is 2, GB. Differencing —A parent virtual disk is used as the basis of this type, with any subsequent writes written to the virtual disk as differences to the new differencing VHD image file, and the parent VHD image file is not modified.
For example, if you have a clean-install system boot operating system virtual disk as a parent and designate the differencing virtual disk as the current virtual disk for the system to use, then the operating system on the parent virtual disk stays in its original state for quick recovery or for quickly creating more boot images based on additional differencing virtual disks. For more information, see MergeVirtualDisk. Note The maximum size of a differencing virtual disk is 2, GB.
Virtual hard disks VHDs are virtualized hard disk files that, once mounted, appear and operate pretty much identically to a physical hard drive. They're most commonly used with Hyper-V virtual machines. VHDs appear just like physical disks in Disk Management. When a VHD has been attached that is, made available to the system for use , it appears blue. If the disk is detached that is, made unavailable , its icon reverts to gray.
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