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Converting a VHD/VHDX to VHD/VHDX usingblock cloning to share used data blocks.This is proof of concept.
Make VHD/VHDX that shares data blocks with source.MakeVHDX [-fixed | -dynamic] [-bN] [-sparse] Source [Destination]Source Specifies conversion source.Destination Specifies conversion destination. If not specified, will use file extension exchanged with ".vhd" when the source is ".vhdx", exchanged with ".vhdx" otherwise.-fixed Make output image is fixed file size type.-dynamic Make output image is variable file size type. If neither is specified, will be same type as source.-b Specifies output image block size by 1MB. It must be power of 2. Silently ignore, if output is image type that doesn't use blocks. (Such as fixed VHD)-sparse Make output image is sparse file. By default, output file is also sparse only when source file is sparse.Supported Image Types and File Extensions VHDX : .vhdx (.avhdx Disallowed) VHD : .vhd (.avhd Disallowed) RAW : .* (Other than above)- Source and destination must have placed on same ReFS v2 volume.
- Differencing type can not be source and/or destination.
- When cluster size is 64 KB, alignment will be 64 KB. Will break alignment when update with any VHD parser.
- Block size less than 1 MB can not be specified.
- Block size other than 2 MB can be specified, but only 2 MB can be used by Microsoft VHD parser.
- Output image will be large. This tool does not inspect file system free space in image, or zero-ed data block.
MIT License
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Zero Copy VHD Converter
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