3 Ways to Fix Convert to Dynamic Disk Greyed Out

Gemma posted on Aug 12, 2020 to Partition Master | How-to Articles

"Hi, we are trying to extend a basic volume (size is 3TB) to dynamic, and the option is greyed out. Could someone help please to resolve this issue quickly? Thanks."

Convert to Dynamic Disk Greyed Out

A user asked a question that when he wants to extend a 3TB basic volume to dynamic disk in a Microsoft forum, he finds out the convert option is greyed out. He wants to know how to fix this "convert to dynamic disk greyed out" issue. In this article, we will tell you why this problem arises and how to solve it.

What Causes Convert to Dynamic Disk Greyed Out
How to Fix Convert to Dynamic Disk Greyed Out (3 Fixes)

What Causes Convert to Dynamic Disk Greyed Out

According to the user's question, the problem appears when he wants to extend a basic volume in which the size is beyond 2TB. And this is the reason why he can't convert the basic disk to dynamic disk. For MBR disk, its partition system is limited to 2TB storage space. Thus, if you switch a disk over 2TB to dynamic disk, the allocated space won't allow Disk Management to perform the conversion.

How to Fix Convert to Dynamic Disk Greyed Out

Since the problem is mainly about the capacity of MBR disk, you can solve it by converting the disk from MBR to GPT. Because a GPT disk does not have limitations that MBR suffers from. It can hold a nearly unlimited number of partitions. And the disk capacity size is no longer limited to 2TB. You have three choices to convert a disk: a partition management tool - EaseUS Partition Master, the Disk Management on the computer, and the DiskPart Command Prompt.

1. Convert Disk from MBR to GPT without Data Loss

All the conventional converting methods will cause data loss. Even if you have made full backups of all your volumes, restoring the backups need quite a long time. As a result, we recommend you to choose EaseUS Partition Master.

EaseUS Partition Master enables you to convert a disk from MBR to GPT or GPT to MBR without deletion or data erase. So you don't need to wait a long time to conduct the backup and restore process. Besides, you can also apply this tool to resize partition on Windows, format a partition, or merge partitions into a larger one.

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 Windows 10 is supported

Download EaseUS Partition Master now, and follow the guide below to explore a safe and sound conversion.

Step 1. Download and launch EaseUS Partition Master on your Windows computer.

Step 2. Right-click the MBR disk that you want to convert and choose "Convert to GPT".

convert MBR to GPT - 1

Step 3. After that, find and click the "Execute 1 Operation" button on the toolbar and choose "Apply" to start the conversion. You need to restart your device to enable this change.

convert MBR to GPT - 2

2. Convert Disk from MBR to GPT with Disk Management

In Disk Management, you can convert the disk type, delete a volume, and extend and shrink a volume, etc. Please follow the steps below to see how to convert the disk from MBR to GPT. This method involves a volume deletion. Please make sure you have made a full backup.

Step 1. Go to Control Panel, head to Administrative Tool, and choose "Computer Management".

Computer Management

Step 2. Click "Disk Management", you can see all your disk volumes here. Right-click one volume and choose "Delete Volume". Repeat the process to delete all the volumes.

Delete Volume

Step 3. Now right-click the MBR disk and choose "Convert to GPT Disk".

Convert to GPT Disk

3. Convert MBR Disk to GPT with DiskPart Command Prompt

You can also convert the disk to GPT with the command prompt. But this method will also require you to delete the volume. Please remember to make a backup.

Step 1. Run as an administrator, press Win, and select "Command Prompt".

Step 2. Type the command diskpart, then type list disk and press Enter.

Step 3. If disk 1 is the MBR disk, type select disk 1. Once selected the MBR disk, type clean to remove all the data on this disk.

Step 4. Now type convert GPT and press Enter to proceed.

Convert to GPT Disk with Command Prompt

The Bottom Line

In a word, convert to dynamic greyed out issue happens because of the MBR disk system limitation. The next time you encounter the same problem, check the MBR disk's size first and pick one method you prefer to solve your problem. Anyway, the EaseUS Partition Master is our recommendation, for it saves users data, and is easy to use.

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 Windows 10 is supported

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Why Choose EaseUS Partition Master?

"I've used Partition Master Professional many times to create, delete, format, move, rename, and resize partitions."PCWorld

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Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines.

What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

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