Tested Ways to Repair Invalid Dynamic Disk without Data Loss Using CMD

User scenario

To save your data, you can try using a third-party disk recovery software, such as EaseUS, to scan and retrieve data from the dynamic disk. This way, you can avoid losing your data by converting it to a basic disk.

Real cause to invalid dynamic disk in Disk Management

When a Windows operating system identifies a dynamic disk as invalid, it can be a source of panic. This error can be caused by a variety of factors, including bad sectors, hard drive issues, a faulty SATA cable, a virus or malware attack, or even an incompatibility issue with the Windows operating system itself.

How to repair invalid dynamic disk without data loss?

There are several ways to repair an invalid dynamic disk, depending on its cause. Four effective methods are available to fix an invalid dynamic disk, addressing different underlying issues.

▌ Method 1. Upgrade your Windows OS version

Dynamic disks are not supported in all Windows versions, so if you encounter an invalid dynamic disk, you may need to upgrade to a Windows OS that supports dynamic disks, which should resolve the issue.

▌Method 2. Reactivate the invalid dynamic disk with DiskPart

To repair an invalid dynamic disk without data loss in Windows 7/8/10/11 using CMD, follow these steps: type "diskpart" and press Enter, then type "list disk" and press Enter, type "select disk X" (where X is the number of the disk you want to repair) and press Enter, type "convert dynamic-to-basic" and press Enter, and finally type "exit" and press Enter. This process will convert the dynamic disk to a basic disk, allowing you to repair it without losing any data.

To open the Command Prompt as an administrator, type "cmd" in the search box, select "Run as Administrator," and follow the subsequent steps. 1.

diskpart
list disk The system has a total of 4 disks, but 2 of them (M0 and M1) are missing, and 2 of them (0 and 1) are offline, which means the system currently has 2 available disks (M2 and 2).
select disk The disk number is the number of the invalid dynamic disks you want to bring online.
online disk

If this solution is not working for you, try the next one. If you're still having trouble, feel free to ask and I'll do my best to assist you further.

▌Method 3. Convert dynamic to basic disk via Disk Management

Step 1. Type diskmgmt.msc in the search box on the desktop to enter Disk Management.

Step 2. Right-click the invalid dynamic disk and choose Convert to Basic Disk.

If the "Convert to Basic Disk" option is grayed out, you'll need to delete all partitions and data on the disk, which will result in data loss, and then select the option to convert to basic disk to resolve the invalid dynamic disk issue.

▌Method 4. Convert dynamic to basic disk without data loss

Qiling Disk Master Professional is a powerful software that manages dynamic or basic disks and volumes on Windows operating systems, including Windows 11/10/8.1/8/7/Vista/XP/2000, and also supports Windows Server 2003/2008/2011/2012/2016/2019/2022 with a Server Edition.

This tool enables you to convert a disk from basic to dynamic or vice versa without losing any data. It also allows you to manage dynamic disks and volumes, providing features such as extending, shrinking, creating, deleting, and moving dynamic volumes, as well as adding drives to RAID configurations and more.

Before converting a dynamic disk to a basic disk, it's recommended to backup all data on the dynamic disk, in case you need to recover data later.

Free Download
Windows 11/10/8.1/8/7, 100% Secure

Here are the detailed steps to convert.

Step 1. Install and run Qiling Disk Master Professional. Right-click the target disk, and choose "Convert to Basic".

Step 2. Wait a while for the Disk master to take effect the conversion.

Summary

Now you know how to repair an invalid dynamic disk without losing data. Qiling Disk Master offers many useful features to help you manage your PC, try more features to improve your machine's performance.

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