If you increase the capacity of your virtual hard disk with the Add the unallocated space to the last volume check box selected, the additional space is added to the last volume. If not, the added space appears in the virtual machine as an unallocated space. To use this additional unallocated space, you can either create a new partition on this unallocated space, or expand one of the partitions you already have. The way of allocating partitions is different for Windows and Linux guest operating systems.
This chapter provides some general guidelines on creating a new partition in Windows and Linux guest operating systems.