HRESULT 0x8031009B (FVE_E_INVALID_DATUM

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Description:

BitLocker volume metadata contains a record type that the current implementation cannot interpret safely.

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FVE_E_INVALID_PIN_CHARS	FVE_E_EFI_ONLY

FVE_E_INVALID_DATUM_TYPE

A metadata compatibility or corruption signal

BitLocker stores typed metadata records describing protectors, keys, conversion state, and volume configuration. FVE_E_INVALID_DATUM_TYPE means a record type was not recognized where a known datum was required. This can reflect newer metadata being read by an older Windows version, or damaged on-disk metadata.

The safest response depends on that distinction. Compatibility problems call for accessing the drive from a newer supported Windows environment. Corruption calls for evidence preservation and recovery planning; manual sector edits can destroy the remaining valid metadata copies.

What to do before repair

Record the Windows version, BitLocker metadata version, conversion status, and whether the drive was recently moved between systems.
Try a current supported recovery environment before assuming physical media failure.
Secure the recovery password, recovery key, and key package associated with this exact drive.
Use repair-bde only with a separate output volume and understand that it cannot repair a drive that failed during conversion.

References

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