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ERROR_VHD_SPARSE_HEADER_CHECKSUM_MISMATCH
ERROR_VHD_SPARSE_HEADER_CHECKSUM_MISMATCH means the checksum of the sparse header in a dynamic or differencing legacy VHD does not validate. The header describes the layout needed to interpret the disk safely.
What to verify
- Treat the VHD as structurally corrupted and do not attach it read-write.
- Check whether the file was copied, restored, deduplicated, or resized shortly before the failure.
- If it is part of a chain, preserve every parent and child file; missing context can make recovery less reliable.
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