

Although I have an unallocated free space (about 19.5 GB). Disk Management > Right Click on C:\ Drive. There is 20GB Unallocated space that is shrunk. Download NIUBI Partition Editor and you'll see the main window with disk partition structure and other information. If you have got Unallocated space by shrinking the adjacent D drive, you need to move Unallocated space to the left side, then Extend Volume will be enabled for C drive. This guide can be applied to all Windows Server extend volume greyed out issue, not only limited to a specific server version How to fix Windows 2012 Server Extend Volume grayed out issue. Video - how to extend volume in Windows Server 2012 when it is unable to extend volume in disk management. The safe and fast solution Windows Server 2012 Extend Volume Greyed out in Disk Management - 3 Fixes. When Disk Management of Windows Server 2012 Extend Volume is greyed out, move Unallocated space with NIUBI Partition Editor and then volume can be extended. This article introduces why Extend Volume grayed out in Windows Server 2012 (R2) and how to fix if Extend Volume is disabled.

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