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STATUS_VHD_DRIVE_FOOTER_MISSING
STATUS_VHD_DRIVE_FOOTER_MISSING concerns the footer used by the legacy .vhd layout. The footer carries the virtual size, disk type and unique identity used to interpret the image; a missing footer therefore prevents the VHD provider from treating the file as a complete legacy VHD container.
A missing footer differs from STATUS_VHD_DRIVE_FOOTER_CHECKSUM_MISMATCH: this status says that the expected structure cannot be found, whereas a checksum mismatch means a candidate footer was found but did not validate. It also does not establish that the guest file system inside the image is corrupt.
Preserve the container before repair
- Keep an immutable copy of the whole image before attempting attachment, conversion or byte-level recovery.
- Identify whether the file is expected to be fixed, dynamic or differencing; dynamic and differencing legacy VHDs have additional structures that a footer alone does not reconstruct.
- Record its byte length and the tool that produced it; do not create a new footer from guessed values and assume the resulting image is safe.
References
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