How to Repair Invalid Dynamic Disk With Ease

Jean updated on Sep 10, 2020 to Partition Master | How-to Articles

Are you looking for a way to repair or recover invalid dynamic disk on Windows 10/8/7? This page explains the causes of why dynamic disk shows invalid in Disk Management and offers practical ways to guide you to fix this error and repair your dynamic disk back to work normally again. 

What Is an Invalid Dynamic Disk

Does disk management show invalid dynamic disk error someday when you finished installing a new Windows OS on an HDD or SSD? It's weird. Now you may wonder which step went wrong.

invalid dynamic disk

So what is an invalid dynamic disk? In a word, your disk 1, disk 2 or disk 0 is a dynamic disk and suddenly it shows as Dynamic invalid in Disk Management on Windows 10, 8 or Windows 7 computer. You should know that an invalid dynamic is inaccessible but don't worry about the data. When a disk becomes invalid, Windows may not be able to access the disk but the saved data is safe. After fixing the error, you can re-access and make use of the saved data on the disk again.

To fully convert or make the invalid dynamic disk work gain, you should first learn the causes and then pick up the right solution to get rid of this error from your disk. Follow the next two parts to learn how to make your dynamic invalid disk work again.

What Causes Dynamic Disk Invalid

There are multiple reasons that may cause this error on a dynamic disk. Here we gathered top * causes that may turn your dynamic disk into the invalid state:

#1. Connection Issue

  • Improperly connecting the dynamic disk to a computer.
  • Problematic disk cable causes connection problems between disk and computer, such as bad SATA cable.
  • Switching dynamic disk to a new computer but not it is not correctly connected. 

#2. OS Is Not Compatible to Dynamic Disk

  • The current running Windows OS doesn't support dynamic disk, such as Windows 7 Home/Windows 7 Home Basic Edition, Windows Visa, etc.
  • On dual-boot OS, one Windows OS recognizes the dynamic disk, while the other OS doesn't. The dynamic disk shows invalid while running on the other OS.

Windows incompatibility issue is one of the typical reasons that causes invalid dynamic disk error. So how to get rid of this issue, making the invalid dynamic disk work again? In the next part, practical fixes and solutions will be available to help you out.

How to Repair Invalid Dynamic Disk

As a matter of fact, Windows operating systems, especially all Home Editions of Windows 10, 8, 7 XP or Vista, are not supported to install on a dynamic disk. To correct invalid dynamic disk error, you can reconnect the disk, upgrade Windows OS, or convert dynamic disk to basic disk. Pick up one method and follow the tutorial steps below to see how to remove this error form your disk without losing any data now.

Method 1. Reconnect the Dynamic Invalid Disk

Works to: Resolve dynamic invalid disk error caused by improper disk connection.

Step 1. Shut down the computer.

Step 2. Remove the dynamic disk from your computer and unplug the SATA cable and power cable.

Step 3. Reconnect the dynamic disk to your computer correctly with the SATA cable and power cable. 

Reconnect dynamic disk

Step 4. Reboot PC to check if the dynamic disk still displays as invalid in Disk Management.

If yes, switch a new SATA cable and Power cable, and repeat the above steps again to reconnect disk to your computer. If the problem gets resolved, congratulation.

After trying all these steps but the invalid error still exists on your computer, you can move on and try the following methods for help.

Method 2. Convert a Dynamic Disk (Invalid) to a Basic Disk

Works to: Fix Windows OS incompatible issue that causes dynamic disk invalid. 

If your Windows OS doesn't support the Dynamic disk, a direct solution to resolve this error is to convert dynamic disk to a basic disk, making the disk compatible with the current OS.

Some of you may want to know whether it will cause data loss while converting the invalid dynamic disk to basic disk, right? With a reliable third-party Windows partition manager like EaseUS Partition Master, the answer is NO. 

Download Now

 Windows 10 is supported

EaseUS Partition Master provides a secure disk conversion option for all Windows users. It enables you to switch a basic disk to dynamic or convert a dynamic disk to a basic disk without losing any data. In only 3 steps, you can easily convert the disk to basic, getting rid of the invalid dynamic disk issue from your computer:


Step 1: Install and open EaseUS Partition Master on your Windows computer by clicking the download button.

EaseUS Partition Manager software

Step 2: Select dynamic disk which you want to convert to basic. Right-click it and choose "Convert to Basic".

convert dynamic to basic

Step 3: Click "OK" on the pop-up window and you will add this conversion to the pending operations.

convert dynamic to basic

Step 4: Click the "Execute 1 Operation" button at the top-left corner and "Apply" to begin to convert dynamic to basic disk. After that, you can also use this partition manager to resize/move, clone, merge, format, and delete the partitions. 

convert basic to dynamic

Method 4. Upgrade Windows OS

Works to: Fix OS incompatible issue that makes dynamic disk incompatible.

The other straightforward way to resolve disk with the dynamic invalid error is to upgrade your computer OS or reinstall the Windows OS to a compatible version.

If you are using old Windows 7 or Windows Vista on your computer, we would like to recommend you to upgrade your computer to the latest Windows 10. If you have no access to upgrade Windows OS to Windows 10, refer to this page for help: How to Clean Install Windows 10

Method 4. Reactivate Disk using Diskpart CMD

Works to: Resolve invalid dynamic disk by reactivating the disk; pre-condition: Windows OS is compatible with the dynamic disk.

If your Windows computer supports dynamic disk and you don't want to convert the disk to a basic version, you can apply Diskpart CMD with reactivating disk command to resolve this error.

Here are the steps:

Step 1. Right-click Windows icon, type cmd in the Search box.

Step 2. Right-click Command Prompt and select "Open as Administrator" to continue.

Step 3. Type the following command line and hit enter each time:

  • diskpart
  • list disk
  • select disk X (replace X with the disk number of your dynamic disk)
  • online disk

Step 4. After this, you can type exit to close the Diskpart window. 

By then, re-open Disk Management to check if the dynamic disk is displaying correctly. If the invalid error still lingers, open Disk Management and right-click the target dynamic disk and select "Reactivate Disk".

Bonus Tips: Recover Dynamic Disk Data, Re-create Disk Partition

Note that if none of the above methods works to resolve the dynamic invalid disk issue, you have the last shot which is to restore saved dynamic disk data and recreate partitions on the disk, and resave data back to the disk. Here is the process:

#1. Recover Data from Invalid Dynamic Disk

If you have saved many important data on the disk, using reliable data recovery software like EaseUS Data Recovery Wizard to scan your device and find all data.

EaseUS Data Recovery Wizard enables you to efficiently scan and restore all data from your disk in only 3 steps:

Step 1. Select and scan hard drive.

On EaseUS Data Recovery Wizard, select the drive where you lose your data and click "Scan". Wait patiently until this program finishes the scanning, it will find all your lost data on the drive.

select and scan the hard drive

Step 2. Find and preview found files on the selected drive.

Check "Deleted Files", "Lost Files" or use "Filter", "Search" to find the lost files on the selected hard drive. You can double-click to open and check the found files.

Preview lost hard drive data

Step 3. Recover and save lost hard drive data.

Select all found lost hard drive files, click "Recover" and browse another secure location to save them. Click "OK" to confirm and finish the recovery process.

recover data from hard drive

After restoring the data, remember to save the data to an external hard drive, which will be more secure.

#2. Delete all existing partition on dynamic disk

Step 1. Open Disk Management and right-click on the dynamic disk partition, select delete volume.

Step 2. Repeat the process to delete all existing partitions on the disk.

If disk management doesn't work to delete the volumes on the invalid disk, you can try EaseUS Partition Master with its delete all partitions feature for help.

#3. Recreate volume on the disk

After deleting all partitions on the dynamic disk, you can then use Disk Management to recreate new volumes on the disk. 

Step 1. Open Disk Management, right-click on the unallocated space of your target disk, and select "New Simple Volume".

Step 2. Set a new drive letter for the partition, set NTFS as its file system, reallocate partition size, etc., to the partition.

Set volume specifications

Step 3. Follow the on-screen guidelines and finish the process.

If you want to create more than one partition on the target disk, repeat the process to create more partitions.

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Frequently Asked Questions

Why Choose EaseUS Partition Master?

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

"Partitioning tools have come a very long since the days of complicated command line utilities and EASEUS Partition Master is one of the most advanced programs available."TECH ADVISOR

"I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes."Lifewire

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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