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Usually, Window’s Disk Management utility is a great tool for managing the volumes in your drive. Still, it has some built-in limitations that can prevent you from executing your desired disk management operation.
Once I uninstalled Ubuntu from my dual-boot PC and then ran the Disk Management utility in Windows, expecting to recover the Linux volume and extend it to the C drive. However, the extend volume option was greyed out.
Worry not if you’ve also found yourself staring at greyed-out extend volume options. In this article, we deal with the reasons why you are having the problem and how to deal with each of them.
There is a recovery volume between the volume you want to extend and an unallocated volume.
There is no unallocated volume on the disk.
No unallocated space to the right of the volume to be extended.
Cannot excess 2 TB capacity in volumes formatted into MBR.
Volume is not NTFS formatted.
If you find yourself unable to extend a volume because it has been greyed out, here are a few verified fixes that you can try to resolve this issue.
If all available disk space has been partitioned and allocated already, you will not be able to extend volume. You will first need to create an unallocated volume. This volume also needs to be immediately on the right of the volume that you are going to extend.
You can create an unallocated volume by either deleting or shrinking the volume to the right.
Please move or backup the important files and data in this volume first. Otherwise, you will lose all data in this volume once you delete it.
To Shrink and Extend Volume:You will find that your volume has been extended by the desired amount.
To Delete and Extend Volume:You can often not extend your C drive even though you have prepared an unallocated volume because there is a Healthy Recovery Partition to the right of the C drive. The only way to extend the C drive from Disk Management in such a case is to delete the recovery partition.
However, you cannot delete the Recovery Partition from the Disk Management utility. You can use the elevated command prompt to perform this action.
You can also use GParted, a free and open-source third-party, to extend volume that was greyed out in the Disk Management utility.
You will need to make a bootable USB drive with GPart on it, then boot into GPart to extend or manage your volumes.
Warning! You must run makeboot or makeboot64 from the USB. If you run it from your hard drive, it could make your hard drive unbootable.
MBR, by design, cannot address volumes greater than 2 TB in size. That is to say, suppose you have a 4 TB drive but you happened to format it into MBR partition style. You will be unable to see more than 2 TB of that drive in Windows, and you will not be able to extend it from Disk Manager either.
To solve this issue, you must first convert the MBR partition into GPT format. Fortunately, Windows provides an MBR2GPT conversion tool that allows for this conversion without data loss.
Now that your MBR disk has been converted to GPT, you can now extend your volume by using the Disk Management utility.
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