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→Creating Hyper-V Virtual Hard Disks
* '''Fixed''' - Fixed virtual hard disks are created at the size specified during the disk creation process. The size of fixed virtual hard disks can be altered using the Hyper-V Manager ''Edit Disk...'' action to launch the ''Edit Virtual Hard Disk Wizard''.
* '''Differencing''' - Differencing is a concept which involves a parent disk and a child disk. The parent disk contains a baseline hard disk image with the operating system and perhaps a range of applications and data installed. Once this baseline parent disk is configured, a differencing disk is assigned as a child. When the virtual machine to which the disk is assigned runs, any changes made the baseline parent image are actually stored on the child differencing disk, leaving the parent disk unaltered. Multiple child disks may be assigned to a parent disk allowing multiple virtual machines to share the same parent disk. When creating a differencing disk, the parent disk will need to be specified. The size of the differencing disk increases as space is required.
