如果是1: Create a new volume.

Right click on the unallocated space.
Choose New Simple Volume 

如果是2： Initialize Disk:

Right click on the unknown, Not Initialised disk.
Choose Initialise Disk from the context menu.

如果是3： set Online:

Right click on the disk which shows Offline.
Choose Online from the pop-up menu.
 

如果是4： Change Drive Letter and Paths:

Right click on the disk partition which has no drive letter.
Choose Change Drive Letter and Paths from the context menu.
Click on the Add button in the pop-up window.
Assign a drive letter to the partition and click OK to confirm.