Enable or Disable Reserved Storage with these DISM Commands

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Beginning with Windows 10 version 2004, the next Windows 10 feature update and the first feature update of 2020, Microsoft will make it easier for administrators to manage dedicated storage. Specifically, Microsoft has added DISM options that can be used to verify, enable, or disable reserved storage on devices running this version of Windows 10.

Previously, it was necessary to modify the registry on the Windows 10 device to enable or disable Reserved Storage.

What is Reserved Storage?

Upgrading Windows requires a certain amount of free space. Updates cannot be installed if your PC does not have enough free space. With the last update, dated May 2019, Microsoft is trying to solve this problem by reserving disk space for future updates.

If you did not have enough free space on your PC before, Windows could not install the updates properly. The only solution is to free up disk space before continuing.

With “reserved space”, Microsoft ensures that Windows 10 reserves at least 7 gigabytes of space on your hard drive so that updates can be downloaded, regardless of how much space you have.

If the reserved space is not used by update files, it is used for applications, temporary files, and system caches, improving the day-to-day operation of your PC.

In other words, reserved space does not mean that Windows uses 7 GB of additional space – it probably stores temporary files that would normally be stored elsewhere on your system disk.

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Determines the status of the reserved memory. This command line option is only supported for Windows online images. If reserved memory is used, it may not be able to be disabled and the following error is returned: This operation is not supported when using reserved memory. Please wait until maintenance is completed and try again later. Changes in the status of the reserved memory are indicated in the Sysprep generalized Windows images.

The syntax:


/Set-ReservedStorageState /State:

Examples :


DISM.exe /Online /Set-ReservedStorageState /State:Enabled
DISM.exe /Online /Set-ReservedStorageState /State:Disabled


Obtains the current status of the reserved memory. This command line option is supported with the Windows online image.



DISM.exe /Online /Get-ReservedStorageState


When Windows 10 is performing a maintenance operation, such as installing an update, you cannot enable or disable the reserved memory function. The operation will fail. You should try running the corresponding DISM command later.


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