By AOMEI / Last Updated August 19, 2020

Case study - Import foreign dynamic disk errors

"Dynamic Disk offline on Windows 2000 Server SP4"

Error1: My wife's PC recently crashed and I need to recover the data off the two hard drives that were in it. They are Mactor 40GB drives. I installed them into my PC, BIOS recognizes them, but they do not appear in "My Computer". However, they do appear in Disk Management as foreign dynamic disk. When I right click on them, I get two usable options: 1. "Convert to Basic Disk" - This option destroys the data on the disk so obviously it is not an option. 2. "Import Foreign Disks" - My searches reveal that this option will make the hard drives usable in my system and the data appear to me. The problem is that I get an error when attempting to import foreign disk, the event log shows the following:

INTERNAL Error - The disk group contains no valid configuration copies (C10000B6).

Error2: I have multiple hard drives. One is for programs (C drive) and another is for data (D drive). My plan was to install Windows 7 on a new SSD drive which would replace my current C drive. Windows 7 wouldn't install onto the SSD for an unrelated reason. So go back to XP. However, when I booted back to XP my data drive D (which I didn't touch) now shows up as a foreign dynamic disk in Disk Management. When I try to import the foreign disk, the dialog shows the single partition as OK, but when I click "OK", I get an error as the following:

INTERNAL Error - A disk group with the specified name already exists (C100007A).

Solution - How to fix the errors?

To fix the errors and import foreign disk successfully, registry modification is required. It may cause serious problems if you use "Registry Editor" incorrectly. Sometimes you need to reinstall your operating system when serious problems occur. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly.

If your system/boot partition is still a basic disk, follow the steps below to correct this condition:

Step1: Type "Regedt32.exe" to start "Registry Editor".

Step2: Click "HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/dmio/Boot Info".

Step3: Under the "Boot Info" key, delete the "Primary Disk Group" key.

Step4: Quit "Registry Editor", and then restart the computer.

Step5: After the reboot, try to import foreign dynamic disk again.

Manage on-line dynamic disk with Dynamic Disk Manager

After the dynamic disk become reactivated or on-line, you could use AOMEI Dynamic Disk Manager to manage the dynamic disk.

Main features of this dynamic management toll

  • Create/Delete/Format.

  • Resize dynamic disk (include system volume and all software raid array) without losing data.

  • Move slice to change the location of volume flexibly on the same disk.

  • Convert dynamic disk to basic without data loss.