Q. How do I mount a WIM file using the Deployment Image Servicing and Management (DISM) tool?

A. You're probably used to using imagex during your Windows Vista days for all your mounting WIM file operations. You can still use imagex, but you now have the option of using the unified DISM tool (which doesn't require the installation of the Windows Automated Installation Kit). To mount an image, use the format

dism /mount-wim /wimfile: /index: /mountdir:

You can optionally add /readonly to make the mount read-only.

The above dism command would be equivalent to the following imagex command:

imagex /mountrw   

So the DISM is a bit more wordy Smile You can see them both in action below.

D:\Temp>dism /mount-wim /wimfile:"d:\OS Images\Windows 7 Ult 64-bit\sources"\install.wim /index:4 /mountdir:d:\temp\mount1

Deployment Image Servicing and Management tool
Version: 6.1.7600.16385

Mounting image
\\[=====================
100.0%
================
\\]
The operation completed successfully.

C:\Program Files\Windows AIK\Tools\amd64>imagex /mountrw "d:\OS Images\Windows 7 Ult 64-bit\sources"\install.wim 4 d:\temp\mount2

ImageX Tool for Windows
Copyright (C) Microsoft Corp. All rights reserved.
Version: 6.1.7600.16385

Mounting: \\[d:\OS Images\Windows 7 Ult 64-bit\sources\install.wim, 4\\] -> \\[d:\temp
\mount2\\]...

\\[ 0% \\] Mounting progress

To dismount with DISM, use

dism /unmount-wim /mountdir: \\[/commit or /discard\\]

For example,

C:\>dism /unmount-wim /mountdir:d:\Temp\mount1 /discard

Deployment Image Servicing and Management tool
Version: 6.1.7600.16385

Image File : d:\OS Images\Windows 7 Ult 64-bit\sources\install.wim
Image Index : 4
Unmounting image
\\[================
100.0%
=====================\\]
The operation completed successfully.
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