Windows中VHDX讲解

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status

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Create

使用diskpart创建:

需要先输入diskpart进入其context, 再执行下面命令(下同)

Create vdisk

Applies To: Windows 7, Windows Server 2008 R2, Windows Server 2012 R2, Windows Server 2012, Windows 8 Creates a new virtual hard disk (VHD) file by using the available disk space on the computer, and then saves it to the location that you specify.

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/gg252579(v=ws.11)

diskpart

Applies to: Windows Server 2022, Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, and Windows Server 2008 R2, Windows Server 2008 The diskpart command interpreter helps you manage your computer's drives (disks, partitions, volumes, or virtual hard disks).

https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/diskpart

常用参数

file (required)

指定vhdx文件路径, 注意需要full path, eg: C:\windows.vhdx

maximum (required)

The maximum amount of space that is exposed by the VHD file in megabytes (MB).

type=fixed|expandable

Fixed (default): Creates a fixed VHD, which has an allocated size that does not change. For example, if you create a fixed VHD that is 24 gigabytes (GB), the file will be approximately 24 GB (with some space used for the internal VHD structure) regardless of the data that is written to it. Creating a fixed VHD takes longer than creating an expandable VHD because the entire file is allocated at the time it is created.

Expandable: Creates a dynamically expanding VHD, which expands to accommodate the data that it contains. For example, a 24 GB dynamically expanding VHD is initially around 80 megabytes (MB) on the host file system. As data is written to the VHD, the file grows, but it has a maximum size of 24 GB.

parent

指定parent vhdx路径, 用于创建differencing VHD file

The differencing VHD contains only the changes from the parent VHD. The parent can be any type of VHD (fixed, dynamically expanding, or differencing). The parent VHD is read-only, so you must modify the differencing VHD.

When you use this parameter to create a differencing VHD, you cannot specify the type parameter. This is because the differencing VHD file always uses the type from the parent VHD.

source

Specifies to create a new VHD file that is a copy of the source file at <file path>. Note that there is no parent-child relationship established between the new VHD and the source VHD.