Merge-VHD

Module:

Hyper-V

Merges virtual hard disks.

Syntax

Merge-VHD
     [-Path] <String>
     [[-DestinationPath] <String>]
     [-Force]
     [-AsJob]
     [-Passthru]
     [-CimSession <CimSession[]>]
     [-ComputerName <String[]>]
     [-Credential <PSCredential[]>]
     [-WhatIf]
     [-Confirm]
     [<CommonParameters>]

Description

The Merge-VHD cmdlet merges virtual hard disks in a differencing virtual hard disk chain. The merge is from a specified source child disk to a specified destination child disk.

Merge is an offline operation; the virtual hard disk chain must not be attached when merge is initiated.

Examples

Example 1

PS C:\> Merge-VHD -Path c:\test\Child4.vhdx -DestinationPath c:\test\Child2.vhdx

This example merges the virtual hard disk from Child4 to Child2, for a virtual disk chain with Child4 as a child of Child3, Child3 as a child of Child2, Child2 as a child of Child1, and Child1 as a child of Parent, and with the virtual hard disk file for each located in c:\test. This example merges all data from Child4 and Child3 up to Child2. Child4.vhdx and Child3.vhdx are not deleted, but are no longer valid virtual hard disk files after the operation.

Parameters

-AsJob

Runs the cmdlet as a background job.

Type:	SwitchParameter
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-CimSession

Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.

Type:	CimSession[]
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-ComputerName

Specifies one or more Hyper-V hosts on which virtual hard disks are to be merged. NetBIOS names, IP addresses, and fully qualified domain names are allowable. The default is the local computer. Use localhost or a dot (.) to specify the local computer explicitly.

Type:	String[]
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-Confirm

Prompts you for confirmation before running the cmdlet.

Type:	SwitchParameter
Aliases:	cf
Position:	Named
Default value:	False
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-Credential

Specifies one or more user accounts that have permission to perform this action. The default is the current user.

Type:	PSCredential[]
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-DestinationPath

Specifies the path to the child in the virtual hard disk chain that is the destination for the merge command.

Type:	String
Position:	1
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-Force

Runs the cmdlet without prompting for confirmation.

Type:	SwitchParameter
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-Passthru

Specifies that an object is to be passed through to the pipeline representing the merged virtual hard disk.

Type:	SwitchParameter
Position:	Named
Default value:	None
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

-Path

Specifies the path to the child in the virtual hard disk chain that is the source for the merge command. If a filename or relative path is specified, the virtual hard disk path will be calculated relative to the current working directory.

Type:	String
Aliases:	FullName
Position:	0
Default value:	None
Required:	True
Accept pipeline input:	True
Accept wildcard characters:	False

-WhatIf

Shows what would happen if the cmdlet runs. The cmdlet is not run.

Type:	SwitchParameter
Aliases:	wi
Position:	Named
Default value:	False
Required:	False
Accept pipeline input:	False
Accept wildcard characters:	False

Inputs

VHDObject

Outputs

Microsoft.Vhd.PowerShell.VirtualHardDisk