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On this page
  • Shrink Virtual Disk
  • Option 1
  • Option 2
  • Set Maximum Size of Virtual Disk
  1. windows

WSL

Last updated 3 months ago

Shrink Virtual Disk

Option 1

Reclaims unused space. Does not change maximum virtual disk size. Disk can automatically expand again in the future, so you have to do this periodically when you delete large files.

wsl --shutdown
wsl -l -v    # Make sure all VMs are stopped
diskpart
Select vdisk file="<pathToVHD>"
detail vdisk
compact vdisk    # Reclaims unused space

The path for a WSL vdisk is usually:

"C:\Users\user.name\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu22.04LTS_79rhkp1fndgsc\LocalState\ext4.vhdx"

(replace with appropriate linux distro name and ID)

TIP: If the compact vdisk command seems to be hung up for a long time with no progress (ex. at 12%), hit Enter.

Option 2

Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-All

Let it reboot.

Resize-VHD -Path "<path-to-vhd>" -ToMinimumSize
# or
Optimize-VHD -Path "<path-to-vhd>" -Mode Full

Set Maximum Size of Virtual Disk

Default is 1TB (1024 GB), so this is only relevant if you want to set the MAX size larger than 1TB.

The MAX size is the "Virtual Size" when you run the following in diskpart:

detail vdisk

https://stephenreescarter.net/how-to-shrink-a-wsl2-virtual-disk/
https://learn.microsoft.com/en-us/windows/wsl/disk-space