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moddingg33k/VirtualBox shrink VMDK.md

Created September 20, 2020 20:46
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VirtualBox shrink VMDK.md

Fill the free space of the disk with zeros

cat /dev/zero > zero.fill; sync; sleep 1; sync; rm -f zero.fill

Get a list of HDDs and the UUID of the virtual disk

VBoxManage.exe list hdds
VBoxManage.exe showhdinfo <disk>.vmdk

Convert to .VDI

VBoxManage.exe clonehd <disk>.vmdk <disk>.vdi --format vdi

Compact

VBoxManage.exe modifyhd <disk>.vdi --compact

Convert back to .VMDK

VBoxManage.exe clonehd <disk>.vmdk <disk>.vdi --format vmdk

Restore UUID (see step #2)

VBoxManage.exe internalcommands sethduuid <disk>.vmdk <original_UUID>
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