compact-vdisk.md

title	description	ms.topic	ms.assetid	ms.author	author	manager	ms.date
compact vdisk	Reference article for the compact vdisk command, which reduces the physical size of a dynamically expanding virtual hard disk (VHD) file.	reference	40ca0820-67de-4160-b62a-e9bf63fe2790	jgerend	JasonGerend	mtillman	10/16/2017

compact vdisk

Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012

Reduces the physical size of a dynamically expanding virtual hard disk (VHD) file. This parameter is useful because dynamically expanding VHDs increase in size as you add files, but they do not automatically reduce in size when you delete files.

Syntax

compact vdisk

Remarks

• A dynamically expanding VHD must be selected for this operation to succeed. Use the select vdisk command to select a VHD and shift the focus to it.

• You can only use compact dynamically expanding VHDs that are detached or attached as read-only.

Related links

• Command-Line Syntax Key

• attach vdisk command

• detail vdisk command

• Detach vdisk command

• expand vdisk command

• Merge vdisk command

• select vdisk command

• list command