Dismount-WindowsImage

Article
09/24/2015

Dismount-WindowsImage

Dismounts a Windows image from the directory it is mapped to.

Syntax

Parameter Set: DismountDiscard
Dismount-WindowsImage -Discard -Path <String> [-LogLevel <LogLevel> {Errors | Warnings | WarningsInfo} ] [-LogPath <String> ] [-ScratchDirectory <String> ] [ <CommonParameters>]

Parameter Set: DismountSave
Dismount-WindowsImage -Path <String> -Save [-Append] [-CheckIntegrity] [-LogLevel <LogLevel> {Errors | Warnings | WarningsInfo} ] [-LogPath <String> ] [-ScratchDirectory <String> ] [ <CommonParameters>]

Detailed Description

The Dismount-WindowsImage cmdlet either saves or discards the changes to a Windows image and then dismounts the image.

The Path parameter specifies the location of the mounted Windows image.

The Append parameter specifies the location of an existing .wim file to add the Windows image to when you dismount it instead of overwriting the existing image.

The CheckIntegrity parameter detects and tracks .wim file corruption. CheckIntegrity stops the operation if DISM detects that the .wim file is corrupted when used with the Mount-WindowsImage cmdlet.

The CheckIntegrity and Append parameters do not apply to virtual hard disk (VHD) files.

Parameters

-Append

Specifies the location of an existing .wim file to add the Windows image to when you dismount it instead of overwriting the existing image.

Aliases	none
Required?	false
Position?	named
Default Value	none
Accept Pipeline Input?	true(ByPropertyName)
Accept Wildcard Characters?	false

-CheckIntegrity

Detects and tracks .wim file corruption. CheckIntegrity stops the operation if DISM detects that the .wim file is corrupted when used with the Mount-WindowsImage cmdlet.

Aliases	none
Required?	false
Position?	named
Default Value	none
Accept Pipeline Input?	true(ByPropertyName)
Accept Wildcard Characters?	false

-Discard

Discards the changes to a Windows image.

Aliases	none
Required?	true
Position?	named
Default Value	none
Accept Pipeline Input?	true(ByPropertyName)
Accept Wildcard Characters?	false

-LogLevel<LogLevel>

Specifies the maximum output level shown in the logs. The default log level is 3. The accepted values are as follows:1 = Errors only2 = Errors and warnings3 = Errors, warnings, and information4 = All of the information listed previously, plus debug output

Aliases	none
Required?	false
Position?	named
Default Value	none
Accept Pipeline Input?	true(ByPropertyName)
Accept Wildcard Characters?	false

-LogPath<String>

Specifies the full path and file name to log to. If not set, the default is %WINDIR%\Logs\Dism\dism.log.In Windows PE, the default directory is the RAMDISK scratch space which can be as low as 32 MB. The log file will automatically be archived. The archived log file will be saved with .bak appended to the file name and a new log file will be generated. Each time the log file is archived the .bak file will be overwritten. When using a network share that is not joined to a domain, use the net use command together with domain credentials to set access permissions before you set the log path for the DISM log.

Aliases	none
Required?	false
Position?	named
Default Value	none
Accept Pipeline Input?	true(ByPropertyName)
Accept Wildcard Characters?	false

-Path<String>

Specifies the full path to the root directory of the offline Windows image that you will service. If the directory named Windows is not a subdirectory of the root directory, -WindowsDirectory must be specified.

Aliases	none
Required?	true
Position?	named
Default Value	none
Accept Pipeline Input?	true(ByPropertyName)
Accept Wildcard Characters?	false

-Save

Saves the changes to a Windows image.

Aliases	none
Required?	true
Position?	named
Default Value	none
Accept Pipeline Input?	true(ByPropertyName)
Accept Wildcard Characters?	false

-ScratchDirectory<String>

Specifies a temporary directory that will be used when extracting files for use during servicing. The directory must exist locally. If not specified, the \Windows\%Temp% directory will be used, with a subdirectory name of a randomly generated hexadecimal value for each run of DISM. Items in the scratch directory are deleted after each operation. You should not use a network share location as a scratch directory to expand a package (.cab or .msu file) for installation. The directory used for extracting files for temporary usage during servicing should be a local directory.

Aliases	none
Required?	false
Position?	named
Default Value	none
Accept Pipeline Input?	true(ByPropertyName)
Accept Wildcard Characters?	false

<CommonParameters>

This cmdlet supports the common parameters: -Verbose, -Debug, -ErrorAction, -ErrorVariable, -OutBuffer, and -OutVariable. For more information, see about_CommonParameters (https://go.microsoft.com/fwlink/p/?LinkID=113216).

Inputs

The input type is the type of the objects that you can pipe to the cmdlet.

System.String[]
Microsoft.Dism.Commands.ImageObject
Microsoft.Dism.Commands.MountedImageInfoObject
Microsoft.Dism.Commands.ImageInfoObject

Outputs

The output type is the type of the objects that the cmdlet emits.

Microsoft.Dism.Commands.BaseDismObject

Examples

Example 1: Dismount an operating system image

This command dismounts the Windows Image mapped to c:\offline and saves any changes that were made while servicing the image.

PS C:\> Dismount-WindowsImage –Path "c:\offline" -Save

Dismount-WindowsImage