HRESULT 0xC03A0001 (ERROR_VHD_DRIVE_FOOTER

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Description:

The virtual hard disk is corrupted. The virtual hard disk drive footer is missing.

Could be also:
Constant	Type	OS
STATUS_VHD_DRIVE_FOOTER_MISSING	NTSTATUS	Windows

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ERROR_BCD_TOO_MANY_ELEMENTS	ERROR_VHD_DRIVE_FOOTER_CHECKSUM_MISMATCH

ERROR_VHD_DRIVE_FOOTER_MISSING

ERROR_VHD_DRIVE_FOOTER_MISSING means a legacy VHD file cannot be opened because the footer that identifies the virtual disk is absent. This commonly follows a truncated copy, incomplete restore, or physical storage failure.

Safe first checks

Stop write activity to the original file and work from a verified copy.
Confirm the file size and compare it with the known source or backup manifest before attempting any recovery.
Use a Hyper-V host to test the copy; do not recreate footer data by hand unless a recovery process has authoritative metadata.

Test-VHD -Path "D:\Recovery\disk.vhd"

A healthy backup is normally safer than trying to make a structurally incomplete VHD writable.

Microsoft: Test-VHD

Microsoft: Manage virtual hard disks

Microsoft: VHDX format overview

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