Maximum disk capacity is 64 TB comparing to the 2-TB limit for VHD.

VHDX is a semi-open file format and you can download this file format specification from Microsoft’s web site and create your own applications that work with VHDX files. The VHDX format has the wide area of usage – virtual disks of Hyper-V virtual machines and Microsoft cluster shared volumes. VHDX is the new version of the virtual disk format provided by Microsoft, which is the successor of the VHD format.

Generation 1 Hyper-V VMs can use only virtual disks of the VHD format.

The VHD format of virtual disks is also supported by VirtualBox and is still used in the Microsoft Azure Cloud.

The maximum supported size of VHD files is 2 TB (2^32*512 bytes) where 32 bit is quantity and 512 bytes is the sector size.

Then, Microsoft presented Hyper-V as a substitution of Microsoft Virtual PC. Later, Microsoft bought Virtual PC and continued development of this virtualization product. VHD refers to the disk image format that was introduced as the virtual disk format of virtual machines for Connectix Virtual PC. With the Free Edition, you can access all the features of the Pro Edition, for a single year, and with a limit of ten machines. The best way to find out if our solution suits you is to download the Free Edition of NAKIVO Backup & Replication. NAKIVO Backup & Replication can ensure robust protection of physical, virtual, and cloud workloads from a single pane of glass. Today’s blog post explains how to convert VHD to VMDK which may be useful when you want to convert Hyper-V VMs to VMware VMs. You cannot import VHD to VMware products until you convert Hyper-V VHD to VMware VMDK. The most popular virtual disk formats are VHD, VHDX, and VMDK.

Converting virtual disks can be required when migrating a virtual machine from one hypervisor to another for testing purposes, or if you have selected an inadequate format of a virtual disk for your virtual machine (VM) during the VM’s creation.

Sometimes you may need to convert a virtual disk file from one format to another. By Michael Bose How to Convert VHD to VMDK: A Step-By-Step Guide

Vhd to iso converter online