The partition size is 2TB (2048GB), and it is in MBR file system format. In this example, the problem is with the size of the partition and file system type. My server has unallocated space on the same disk, next to the partition (at right side) and the volume is formatted in NTFS. In my case, it is matching all 3 requirements. To find out more requirements, you can check this excellent guide written with screenshots and explanation. Though a partition is meeting the above 2 requirements, if it is formatted in FAT32 or other file system formats, then you will not get the option to extend the volume. If there is unallocated space somewhere on the same disk but not next to the partition at the right side, then the extend volume will be greyed out.ģ) Only NTFS or no file system (RAW) supported If the disk doesn’t have unallocated space, then you need to delete an existing partition next to it to get unallocated space.Ģ) The unallocated space should be on the precisely next (right side) of the partition that needs be extended. You can’t extend a volume across different drives.
There should be unallocated space on the same disk where the partition you are going to extend. Here are the few basic requirements to get the option to extend a volume/partition when you do not have enough space on a partition.ġ) The disk should have unallocated space. Basic Requirements to get ‘Extend Volume’ Option in Windows OS Though it is a Windows 2019 server in this example, the below methods are applicable for Windows 2016/2012 R2 servers and client Operating Systems like Windows 10. By the way, this is a virtual machine on Azure cloud. After digging all scenarios, I found out the reason why I was not able to extend the volume even though I have an empty space on the same disk next to the partition.
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