We can create a virtual disk either when creating a virtual machine or can create it separately. There are different option when creating a Virtual Harddrive.
- Dynamically expanding disks:
The virtual machine utilizes only the physical disk it is actually using. When more disk space is needed, the space used on the physical disk expands up to the defined amount of disk for the virtual machine.
The virtual machine utilizes the full amount of physical diskassigned to it, whether it is being used or not.
A pass-through disk utilizes external storage without the use of a virtual hard disk. The virtual machine writes directly to the external storage
You can use a differencing disk if you are going to make achange to a virtual machine and want to have the option to roll back to the virtual machine before the changes are made, if needed. With a differencing disk, all changes are logged on this disk, and the original virtual hard drive is left intact.
Steps to create a Virtual Drive is as follows.
1. Open Hyper-V Manager through Server Manager or from your server's Administrative Tools.
2. In the Actions pane, select New, Hard Disk.
3. On the Before You Begin screen, click Next.
4. The Choose Disk Type screen asks you what type of virtual hard disk you want to create (for example, dynamically expanding, fixed size, differencing).
Choose one and click Next.
5. On the Specify Name and Location screen, provide a name and the location for the .vhd file. You can click Browse to select a new location if the default doesn't suit your needs.
6. On the Configure Disk screen, determine the size you require. You will be shown a default size under Create a New Blank Virtual Hard Disk and the maximum you can create. You can also choose Copy the Contents of the Specified Physical Disk if you want to use a physical disk and move the contents to the virtual drive. Make your choice and click Next or Finish.
7. On the Summary screen, confirm your choices and click Finish.
Now we have created a Virtual Harddrive.
