Overview
VirtualBox uses the VDI disk format while VMware uses VMDK. To move a virtual machine between the two you need to convert the virtual disk. This guide covers reliable conversion methods using tools you already have.
Key Takeaways
- VDI is VirtualBox’s native disk format; VMDK is VMware’s.
- VirtualBox’s VBoxManage tool converts disks from the command line.
- You can also export to OVA/OVF for a portable, cross-platform package.
- Always work on a copy of the original disk.
Note: Back up or copy the original VDI before converting so the source virtual machine stays intact.
Convert With VBoxManage
1. Shut down the virtual machine in VirtualBox.
2. Open Command Prompt in the VirtualBox installation folder.
3. Run: VBoxManage clonemedium disk "source.vdi" "output.vmdk" --format VMDK
4. Wait for the conversion to complete and note the output path.
Use the New VMDK in VMware
1. Create a new virtual machine in VMware.
2. When prompted for a disk, choose Use an existing virtual disk.
3. Point it to the converted .vmdk file.
4. Boot the VM and, if needed, install VMware Tools for full driver support.
Troubleshooting
Problem: VBoxManage is not recognized.
Solution: Run it from the VirtualBox install folder or add that folder to your Path variable.
Problem: The VM will not boot in VMware.
Solution: Adjust the disk controller type (IDE, SATA, or SCSI) to match what the guest OS expects.
Problem: The guest OS shows driver errors after moving.
Solution: Install VMware Tools so the correct virtual hardware drivers load.
Problem: The conversion fails midway.
Solution: Ensure you have enough free disk space and that the source VDI is not locked by a running VM.
Conclusion
Converting VDI to VMDK lets you migrate machines between VirtualBox and VMware with minimal fuss. VBoxManage handles the conversion cleanly, and VMware Tools completes the move.
About TechHub
This guide is part of the TechHub Knowledge Base. For more step-by-step IT guides and support, visit techhub.com.lk.
