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FVE_E_CONV_RECOVERY_FAILED
Conversion has its own recovery records
BitLocker updates encrypted regions and conversion metadata as a volume moves between fully decrypted, encryption in progress, fully encrypted, and decryption in progress. FVE_E_CONV_RECOVERY_FAILED means recovery after an abrupt interruption could not establish a trustworthy continuation point.
Possible causes include damaged conversion logs, write-protected media, storage errors, or loss of metadata updates. This is not the same as an ordinary locked volume: possession of a valid protector may unlock keys but does not automatically reconstruct incomplete conversion bookkeeping.
Preserve evidence before acting
- Stop repeated conversion attempts and capture storage-health and BitLocker-API events.
- Record conversion percentage and state if management tools can still read them.
- Create a sector-level image when media failure is suspected and retain all recovery material.
- Note that
repair-bdedocuments a limitation for drives that failed during encryption or decryption; plan recovery to a separate destination rather than assuming in-place repair.
References
- Microsoft: repair-bde limitations
- Microsoft: BitLocker operations guide
- NIST: storage media security guidance
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