A has a set amount of that was configured when the disk group was created. You can use that free capacity to configure the disk group into one or more . When you configure a virtual disk, you must think about the uses for that virtual disk and set a capacity that is appropriate for those uses.
You can organize a disk group by the tasks that use the storage. You can create virtual disks for each task. Set your virtual disk capacity based on the amount of data you want to store. A virtual disk that stores large multimedia files needs more capacity. A virtual disk that stores small text files needs less capacity.