What does NTSTATUS 0xC0210001 (STATUS_FVE_NOT_ENCRYPTED) mean?

STATUS_FVE_NOT_ENCRYPTED

Meaning and context of STATUS_FVE_NOT_ENCRYPTED

This is an operation-to-volume mismatch: the caller requested a BitLocker-specific action for a volume that is not in the encrypted state that the action requires. It is not the same as a locked BitLocker volume, because a locked volume is encrypted and awaits an unlock protector.

Check the mount point, volume role, conversion state, and encryption method before changing any protectors. manage-bde -status or Get-BitLockerVolume should be used to confirm the target rather than relying on a drive letter that may have changed after attaching media or entering Windows Recovery Environment.

A repair or unlock operation intended for a protected data drive will not become valid simply by supplying a recovery password to an unencrypted target. First establish whether the correct volume was selected and whether BitLocker was ever enabled on it.

BitLocker overview | BitLocker operations guide | manage-bde reference

Native status interpretation

STATUS_FVE_NOT_ENCRYPTED is 0xC0210001, an NTSTATUS error value. AllStat describes it as “The volume is not encrypted, no key is available.”