How to fix disk management can't extend boot partition

As time goes on, the disk layout may seem unreasonable, and resizing partition is necessary. For example, there is a need to extend system partition size when encountering low disk space warning in Windows 7/8/10. However, in many cases, you will find that you cannot use Disk Management utility to do this work, because the option Extend Volume is either missing or greyed out due to some reasons... This post mainly talks about why Disk Management can't extend boot partition and how to extend boot partition in Windows 7/8/10 flexibly.

Can't Extend C Drive Windows 10

Windows built-in Disk Management is a good choice for you to extend boot partition because it is free and reliable to use. You just open Disk Management Utility-> right-click the boot partition -> select Extend Volume -> go through the Extend Volume Wizard, then all will be finished in a minute.

However, sometimes you can't extend boot partition Windows 10/8/7 with Disk Management because Extend Volume is greyed out. 

Possible reasons that lead to "Extend Volume greyed out" issue on basic disks:

  • You are extending a primary partition but there is no unallocated space on the neighboring right side;
  • You are extending a logical partition but there is no free space on the neighboring right side;
  • You are extending a partition that does not have RAW or NTFS file system.

Possible reasons that lead to "Extend Volume greyed out" issue on dynamic disks:

  • There is no unallocated space on dynamic disks.
  • There is no unallocated space on the neighboring right side of C drive.
  • There is no continuous unallocated space located behind mirrored/striped/spanned/RAID volume, or the continuous unallocated space is located behind only one segment of these volumes.

Here is a picture showing Disk Management can't extend C drive with unallocated space due to the first reason - the unallocated space is far from the system partition: 

image

MiniTool Partition Wizard is able to extend boot partition Windows 7/8/10 when Extend Volume is greyed out. 

Currently, third-party partition manager can help extend boot partition Windows 10/8/7 successfully. MiniTool Partition Wizard is such a partition manager, which is available to use in Windows XP/Vista/7/8/10 as well as Windows Server 2000/2003/2008/2011/2012.

By reading the above content, you know many factors will lead to Extend Volume greyed out. However, MiniTool Partition Wizard provides you good features, which enable you to extend boot partition without difficulty. 

Part 1: Extend Volume Greyed out on Basic Disk


Now, let's use the Free Edition (works for Windows XP/7/8/10) of this program to deal with the problem that Windows built-in Disk Management tool can't extend C drive Windows 10. 

Step 1: Firstly click the boot partition which needs expanding, then you see there are many functions in the left pane. Here click "Extend Partition" feature. 

Step 2: Then in the pop-up window, take some free space from another partition or unallocated space on the same disk. Also you can locate on the square button and slide it around to decide how much free space you want.

After that, click "OK" and continue. 

Step 3: Finally click "Apply" to extend boot partition Windows 10. 

image

Part 2: Extend Volume Greyed out on Dynamic Disk

The following picture shows Disk Management can't extend C drive with unallocated space because the unallocated space is not immediately following the Simple Volume C. 

At this time, you can also use MiniTool Partition Wizard to help you. 

Step 1: Run MiniTool Partition Wizard Professional on Windows 10, then on the dynamic disk click the volume that separates the boot partition and unallocated space, and choose "Move/Resize Volume". 
Step 2: Drag the whole volume rightwards to exchange the relative locations of this volume and the unallocated space.
Step 3: You should apply this change before you can continue, and your computer will get restarted by Partition Wizard. 

Tip: 
If there are several volumes between the boot volume and the unallocated space, please repeat Step 1- Step 3 until the unallocated space is on the neighboring right side of C drive. 


Step 4: Re-launch Partition Wizard Professional, click the system partition and choose "Move/Resize Volume" one more time. However, in the pop-up window, drag the system volume to occupy the unallocated space instead of exchanging their locations. 

Step 5: Finally, confirm extending boot volume on this dynamic disk. 

Can't Extend Boot Partition - Extend Volume Is Missing

If you have the experience of using multiple Windows OS, you may have noticed that in Windows XP, Windows Server 2000 and Windows Server 2003, Disk Management lacks the features of Extend Volume and Shrink Volume on basic disks (image attached). Only the later versions have these two features added. 

image

The solution to "Extend Volume is missing" is just the same as "Extend Volume greyed out", you just ask MiniTool Partition Wizard for help. Please note that only the paid version of MiniTool Partition Wizard can be used to manage dynamic disk (edition comparison).

Here the Professional Edition and Server Edition are recommended, since they are both useful to manage dynamic disks. Their difference is that the former one is only compatible with Window PC OS, but the latter one covers both Windows PC OS and Windows Server OS. 

Now, since Extend Volume feature is missing from Disk Management on basic disk, and you have converted the basic disk to dynamic, only to find that Extend Volume on Dynamic disk is useless, you can do the followings: 

Solution 1: Use Partition Wizard to Extend Boot Partition on Dynamic Disk

Step 1: Use "Move/Resize Volume" feature to make the unallocated space on the neighboring right side of C drive.
Step 2: Apply the change.
Step 3: Use "Move/Resize Volume" feature to enlarge the C drive by adding the unallocated space.
Step 4: Apply the change. 
For more detailed explanation, you can refer to the former part - how to solve "Extend Volume greyed out on dynamic disk". 

Solution 2: Use Partition Wizard to Convert the Dynamic Disk to Basic and then Extend Boot Volume


Besides, MiniTool Partition Wizard can also help you convert dynamic disk to basic disk without data loss, by doing this you can extend boot partition on basic disk even though Extend Volume feature is missing.

Disk Management can't extend boot partition is that there is no option for you to extend volume. In other words, Extend Volume feature is missing from Disk Management

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