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vssadmin resize shadowstorage

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Applies to: Windows Server 2022, Windows Server 2019, Windows 10, Windows 8.1, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, Windows Server 2008

Resizes the maximum amount of storage space that can be used for shadow copy storage.

The minimum amount of storage space that can be used for shadow copy storage can be specified by using the MinDiffAreaFileSize registry value. For more information, see MinDiffAreaFileSize.

Warning

Resizing the storage association may cause shadow copies to disappear.

Syntax

vssadmin resize shadowstorage /for=<ForVolumeSpec> /on=<OnVolumeSpec> [/maxsize=<MaxSizeSpec>]

Parameters

Parameter Description
/for=<ForVolumeSpec> Specifies the volume for which the maximum amount of storage space is to be resized.
/on=<OnVolumeSpec> Specifies the storage volume.
[/maxsize=<MaxSizeSpec>] Specifies the maximum amount of space that can be used for storing shadow copies. If no value is specified for /maxsize, there's no limit placed on the amount of storage space that can be used.

The MaxSizeSpec value must be 1 MB or greater and must be expressed in one of the following units: KB, MB, GB, TB, PB, or EB. If no unit is specified, MaxSizeSpec uses bytes by default.

Examples

To resize shadow copy of volume C on volume D, with a maximum size of 900MB, type:

vssadmin resize shadowstorage /For=C: /On=D: /MaxSize=900MB

To resize shadow copy of volume C on volume D, with no maximum size, type:

vssadmin resize shadowstorage /For=C: /On=D: /MaxSize=UNBOUNDED

To resize shadow copy of volume C by 20%, type:

vssadmin resize shadowstorage /For=C: /On=C: /MaxSize=20%