vhdfix patches the parent path stored inside a classic VHD differencing disk. It is intended for cases where the parent VHD was moved and PowerShell Set-VHD cannot update the stored parent locator.

Usage

Preview a change without writing:

dotnet run --project src\VHDPatchFix\VHDPatchFix.csproj -- --vhd "I:\B.vhd" --parent "I:\A.vhd" --dry-run

Patch the VHD and create the default .bak backup:

dotnet run --project src\VHDPatchFix\VHDPatchFix.csproj -- --vhd "I:\B.vhd" --parent "I:\A.vhd"

Verify after writing:

Get-VHD -Path "I:\A.vhd"

Safety Notes

Only classic .vhd differencing disks are supported.
.vhdx is not supported.
The child VHD should be detached before patching.
The tool does not require the new parent path to exist on the current computer.

Development

dotnet build VHDPatchFix.sln -v minimal
dotnet run --project src\VHDPatchFix\VHDPatchFix.csproj -- --help