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Set-VHD

Last Updated: 3/8/2017

SYNOPSIS

Sets properties associated with a virtual hard disk.

SYNTAX

Parent (Default)

Set-VHD [-Path] <String> [-ParentPath] <String> [-LeafPath <String>] [-IgnoreIdMismatch] [-Passthru]
 [-CimSession <CimSession[]>] [-ComputerName <String[]>] [-Credential <PSCredential[]>] [-WhatIf] [-Confirm]
 [<CommonParameters>]

PhysicalSectorSize

Set-VHD [-Path] <String> -PhysicalSectorSizeBytes <UInt32> [-Passthru] [-CimSession <CimSession[]>]
 [-ComputerName <String[]>] [-Credential <PSCredential[]>] [-WhatIf] [-Confirm] [<CommonParameters>]

DiskIdentifier

Set-VHD [-Path] <String> [-ResetDiskIdentifier] [-Force] [-Passthru] [-CimSession <CimSession[]>]
 [-ComputerName <String[]>] [-Credential <PSCredential[]>] [-WhatIf] [-Confirm] [<CommonParameters>]

DESCRIPTION

The Set-VHD cmdlet sets the ParentPath or PhysicalSectorSizeBytes properties of a virtual hard disk. The two properties must be set in separate operations.

EXAMPLES

Example 1

PS C:\> Set-VHD -Path Child1.vhd -ParentPath ParentCopy.vhd -LeafPath Child2.vhd

This example sets the parent of the virtual hard disk associated with ParentCopy.vhd as the parent of the chained virtual hard disk associated with Child1.vhd, where the leaf of the virtual disk chain is the virtual hard disk associated with Child2.vhd. The operation is performed in online mode.

Example 2

PS C:\> Set-VHD -Path Child1.vhd -ParentPath ParentCopy.vhd

This example sets the parent of the virtual hard disk associated with ParentCopy.vhd as the parent of the chained virtual hard disk associated with Child1.vhd. This operation cannot be performed when the virtual disk chain is attached.

Example 3

PS C:\> Set-VHD -Path Child1.vhd -parentpath parentcopywithnewid.vhd -IgnoreMismatchId

This example sets the parent of Child1.vhd to point to parentcopywithnewid.vhd, even though parentcopywithnewid.vhd has a different ID than the original parent of child1.vhd. The operation is performed in offline mode. This mode should be used with extreme caution, and only when it is certain that the block contents of the new and old parents are exactly the same. Otherwise data loss can occur.

Example 4

PS C:\> Set-VHD -Path c:\test.vhdx -PhysicalSectorSizeBytes 512

This example sets the physical sector size of a VHDX to 512 bytes.

PARAMETERS

-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[]
Parameter Sets: (All)
Aliases: 

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

-ComputerName

Specifies one or more Hyper-V hosts on which the parent of a virtual hard disk in a differencing hard disk chain is to be set. 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[]
Parameter Sets: (All)
Aliases: 

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

-Confirm

Prompts you for confirmation before running the cmdlet.

Type: SwitchParameter
Parameter Sets: (All)
Aliases: cf

Required: False
Position: Named
Default value: 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[]
Parameter Sets: (All)
Aliases: 

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

-Force

Forces the command to run without asking for user confirmation.

Type: SwitchParameter
Parameter Sets: DiskIdentifier
Aliases: 

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

-IgnoreIdMismatch

Specifies that the check for identifier mismatch between the parent and child virtual hard disk is to be skipped.

Type: SwitchParameter
Parameter Sets: Parent
Aliases: 

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

-LeafPath

Specifies the path to the virtual hard disk file of the virtual hard disk representing the leaf node of the virtual hard disk chain. Required when performing the operation in online mode.

Type: String
Parameter Sets: Parent
Aliases: 

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

-ParentPath

Specifies the path to the parent disk of a differencing virtual hard disk. Can be performed regardless of whether the disk is online or offline.

Type: String
Parameter Sets: Parent
Aliases: 

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

-Passthru

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

Type: SwitchParameter
Parameter Sets: (All)
Aliases: 

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

-Path

Specifies the path to the virtual hard disk file of the virtual hard disk drive whose parent in the virtual hard disk chain is to be set.

Type: String
Parameter Sets: (All)
Aliases: FullName

Required: True
Position: 0
Default value: None
Accept pipeline input: True (ByPropertyName, ByValue)
Accept wildcard characters: False

-PhysicalSectorSizeBytes

Specifies the physical sector size, in bytes. Valid values are 512 and 4096. This parameter is supported only on a VHDX-format disk that is not attached when the operation is initiated.

Type: UInt32
Parameter Sets: PhysicalSectorSize
Aliases: 
Accepted values: 512, 4096

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

-ResetDiskIdentifier

Indicates that the cmdlet modifies the disk identifier of the virtual disk associated with the virtual hard disk file. The disk identifier is the SCSI Vital Product Data (VPD) Page 0x83h identifier associated with a disk. Use this parameter only for a VHDX-format disk.

Type: SwitchParameter
Parameter Sets: DiskIdentifier
Aliases: 

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

-WhatIf

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

Type: SwitchParameter
Parameter Sets: (All)
Aliases: wi

Required: False
Position: Named
Default value: False
Accept pipeline input: False
Accept wildcard characters: False

CommonParameters

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters.

INPUTS

OUTPUTS

NOTES

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