VHD
VHD Disk Image
VHD (Virtual Hard Disk) is a disk image file format that represents a virtual hard disk drive, commonly used by virtualization software.
What is VHD Disk Image?
The Virtual Hard Disk format was originally developed by Connectix and later acquired by Microsoft for use in products like Microsoft Virtual PC, Hyper-V, and Virtual Server. A VHD file contains the complete contents and file structure of a physical storage device, allowing entire operating systems, programs, and data to reside within a single file. It is widely used in cloud computing, virtualization, and backup systems, and can be easily converted to other formats such as QCOW2 using ConvertX tools like vhd-to-qcow2 and qcow2-to-vhd.
Advantages
- Compatible with a wide range of Microsoft virtualization products
- Encapsulates an entire operating system and data in a single file
- Supports dynamic expansion to save initial storage space
- Can be mounted natively in modern Windows operating systems
Limitations
- File fragmentation can degrade performance over time
- Limited native support outside of Windows and specific hypervisors compared to raw formats
- Fixed-size VHDs consume maximum allocated space immediately
How to open VHD Disk Image files
Microsoft Hyper-V
Oracle VM VirtualBox
VMware Workstation
Windows Disk Management
7-Zip
Common use cases
- Running virtual machines on Hyper-V or VirtualBox
- Creating system backups and disk images
- Deploying pre-configured virtual appliances
- Testing software in isolated virtual environments
VHD converters
Explore other formats
Frequently asked questions
A VHD file is a virtual hard disk image that stores the contents of a physical disk, including operating systems and files, within a single file used by virtual machines.
In Windows, you can mount a VHD file directly via Disk Management to view and access its contents as a standard drive letter.
Yes, you can easily convert VHD files to QCOW2 and vice versa using ConvertX tools such as vhd-to-qcow2 and qcow2-to-vhd.
A fixed VHD allocates the full specified disk space upon creation, while a dynamically expanding VHD grows in file size only as data is added.