What does HRESULT 0x80310088 (FVE_E_CONV_RECOVERY_FAILED) mean?

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BitLocker could not reconstruct a consistent encryption-conversion state after conversion was interrupted.

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FVE_E_POLICY_CONFLICT_RO_AND_STARTUP_KEY_REQUIRED	FVE_E_VIRTUALIZED_SPACE_TOO_BIG

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-bde documents a limitation for drives that failed during encryption or decryption; plan recovery to a separate destination rather than assuming in-place repair.

References

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