RAID Recovery™ Recovers all types of corrupted RAID arrays
RAID Recovery™
Recovers all types of corrupted RAID arrays

What are VHD and VHDX files?

Here you will find out:

  • what VHD and VHDX files are
  • what the difference between VHD and VHDX is
  • when DiskInternals can help you

Are you ready? Let's read!

About VHD and VHDX files

Hyper-V virtual disks function like virtual machine hard disks and are a great alternative to physical hard disks. Virtual disks are stored as VHD or VHDX files located on a physical disk. VHD is an older format; VHDX file format is gaining popularity, due to its increased storage capacity, a higher level of data protection, and improved performance on disks with a large sector. Virtual disks, like physical disks, can contain disk partitions, as well as their own file system, sectors, and folders.

With VHD and VHDX files, you can perform standard disk and file operations and use them as storage for virtual machine data. Thus, each virtual machine must have at least one virtual hard disk.

You can use different types of VHD and VHDX files:

  • 1. Fixed: when creating such VHD files, the space assigned for the virtual disk does not change regardless of the addition or removal of data. However, the virtual hard disk file is the same size as the virtual hard disk.
  • 2. Dynamically expanding: in this case, the space for the virtual disk is allocated on demand, so the VHD or VHDX file can grow as more data is added. A virtual hard disk has a certain amount of physical disk space, but the space is allocated as needed.
  • 3. Differencing: this type of disk is used to store, identify, manage, and undo changes made to another virtual or parent disk.

What is the difference between VHD and VHDX?

VHD is a longer-used format, which is gradually being replaced by the more powerful VHDX format.

So what are the benefits of VHDX and how else are VHD and VHDX different?

  • 1. VHD is supported by Windows Server 2008, 2008R2, 2012R2 and 2012. VHDX can only be used with Windows Server 2012 and later.
  • 2. VHD has a storage limit of up to 2 TB. In comparison, the VHDX format can easily hold up to 64 TB of data.
  • 3. VHDX supports a 4 KB logical sector size, while VHD supports only a 512 byte logical sector size. As a result, VHDX can provide you with a nice performance boost.
  • 4. VHDX has special protection against file corruption caused by unexpected I / O failure by monitoring metadata. Thus, sudden power outages are nothing to worry about.
  • 5. VHDX also provides larger blocks than VHDs for dynamic and differential disks with custom metadata features.
  • 6. Resizing without downtime is only possible for VHDX files.
  • 7. Only VHDX has the ability to trim or flatten data in full.
  • 8. VHDX offers different types of storage (fixed and dynamic)..

Having analyzed all the pros and cons, you can now think about and choose the option that is more suitable for you: VHD or VHDX.

How to recover corrupted VHD / VHDX files

There is always the possibility of damage or loss of data in VHD / VHDX files for a variety of reasons: hardware failure, file corruption by a virus, sudden system shutdown, power outage, etc. If something like this happens to you and you lose files, download and install DiskInternals RAID Recovery right away. Recover data from RAID arrays of any level using this software.

Customer confidence in this utility has not fallen in over 15 years! You can use manual or automatic data recovery (automatic recovery includes a step-by-step recovery wizard). Once you are confident that your data has been returned and recovered properly (easily verified with a free preview), purchase a license. Then you get unlimited access to your previously inaccessible files and the ability to export selected files to any suitable storage device.

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