They’re correct in the abstract sense, but the capitalization is wrong because these are not formal labels. I’ve seen some people use the Generation 1 and Generation 2 labels with VHD and VHDX. I have explained the process for VHDX creation in another article. There are a few things to understand about VHDX files before creating them. There are many third-party tools, some of which are free, to convert the following: You can convert VHDX to VHD or VHD to VHDX by editing the virtual disk of the virtual machine and selecting the Convert option. When it comes to converting between the VHD and VHDX virtual disk formats, Hyper-V Manager allows IT admins to easily convert between the two. One of the tasks that may come up for the Hyper-V administrator is converting between various virtual disk formats. Custom metadata support not supported by VHD.It supports data trim operations not supported with VHD.It supports advanced data alignment not supported with VHD.It supports the 4 KB sector size which is more efficient than the 512 KB sector size of VHD.It supports live resizing, which is not supported with VHD virtual disks.It is supported in Windows Server 2012 and higher.VHDX includes data corruption protection.VHDX has a larger configuration maximum – 64 TB of storage capacity, compared with 2TB with VHD.Note the following differences (and advantages) of VHDX: There are several fundamental and important differences to note between VHD and VHDX. ![]() If you need to mount them on the Azure side, they will be automatically converted to VHD, although you do need to stay below the 2TB maximum size limit of the VHD file format. Microsoft Azure still does not support uploading VHDX files, but you can replicate your VHDXs there. ![]() You might ask the question – under what conditions might it be necessary to create a VHD file rather than a VHDX file? If you will never use the virtual disk file with down-level management operating systems (Windows 7 or Windows/Hyper-V Server 2008 R2 or earlier), then you should always use VHDX (remember that guest operating systems don’t know or care which you use). You can mount a VHDX containing ext3 partitions inside Windows 10, but it will be unable to manipulate the contents because it doesn’t know what to do with ext3. When a VHDX is mounted in Windows 10 or a server OS, it will require both the VHDX driver and the file system driver in order to be able to manipulate and read the contents of the file. Linux guests can run perfectly well from their common ext3 and ext4 formats when inside a VHDX. For this reason, it does not matter at all to any guest operating system if you use VHDX or some other format. They could just as easily be on a SAN LUN or a local SSD. There is no indication that the visible contents are held within a VHDX. Simply, a VHDX that contains a possible NTFS format looks like the following: It is up to some other component, such as the guest operating system, to define how the blocks are used. VHDX presents the same characteristics as a physical hard drive, SSD, SAN LUN, or any other block storage. It is also not concerned with partitions. It is not related to file systems, such as NTFS or FAT, or EXT3. Microsoft publishes this specification freely so that others can write their own applications that manipulate VHD/VHDX files, but Microsoft maintains sole responsibility for control of the format.Ī VHDX mimics a hard disk. The x was added to the current specification’s name so that it would not be confused with the earlier VHD format. You can also restore Hyper-V virtual machine from VHDX since this can contain the operating system installation and all data. With the virtual hard disk represented by a file, it also makes it easy to import VHDX to Hyper-V which allows moving virtual machines and data around easily. VHDX is a semi-open file format that describes a v irtual h ard d isk. ![]() We will also consider the differences in the older VHD vs VHDX file. The VHDX virtual disk file provides many features and capabilities that allow IT admins to have advanced functionality for business-critical workloads running in the enterprise. Hyper-V, like most hypervisors, defines this abstract computer using files, as in the case of the VHDX file mentioned at the outset. It mimics a physical computer for the purpose of extending the flexibility of the computer system while still providing as many features of the physical environment as possible. A virtual machine is an abstract computer, including the VHDX virtual disk file used in Hyper-V to represent the physical hard drive attached to a physical computer.
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