What’s new in Microsoft’s VHDX virtual disk format?

With Windows Server 2012 and the latest Hyper-V, Microsoft has also released a new version of their virtual hard drive file. This file, with the extension VHDX, can do much more than the older VHD file. Here are the highights:

  • VHDX files can be up to 64 TB in size as opposed to 2 TB for VHD files.
  • VHDX files have a 4K block size, which can improve performance.
  • Updated metadata structures help to prevent data loss during power failures.

The size difference alone is worth a look as it can enable Hyper-V to support ever-increasing workload sizes.

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