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STATUS_FVE_NO_AUTOUNLOCK_MASTER_KEY
Meaning and context of STATUS_FVE_NO_AUTOUNLOCK_MASTER_KEY
Automatic unlock is a relationship between an encrypted data volume and information protected on the operating-system volume. This status means the OS-side material needed for that relationship was not available; it is not simply a wrong password entered for the data drive.
Confirm that the target is a non-OS data volume and inspect both the data volume and the operating-system volume. The BitLocker planning documentation distinguishes auto-unlock from the usual interactive recovery mechanisms, and manage-bde -autounlock manages this feature explicitly.
Keep a usable recovery method before clearing or rebuilding automatic-unlock settings. Re-enabling auto-unlock without verifying the OS drive, the data-volume protector, and recovery-key escrow can create a second outage instead of restoring unattended startup.
manage-bde autounlock | BitLocker planning | BitLocker status
Native status interpretation
STATUS_FVE_NO_AUTOUNLOCK_MASTER_KEY is 0xC0210024, an NTSTATUS error value. AllStat describes it as “The auto-unlock master key was not available from the operating system volume. Retry the operation using the BitLocker WMI interface.”. The first useful question is which native API, IRP, protocol operation, or subsystem in the kernel, native API, or subsystem that returned the status produced that status.
Debugging sequence
- Preserve this result before RtlNtStatusToDosError, HRESULT conversion, exception translation, or provider-specific remapping removes information.
- Correlate this result with ETW, Event Viewer, protocol traces, or a dump from the component that owns fve / autounlock / master / key; do not diagnose from translated text alone.
- For kernel I/O, keep the device stack, IRP major/minor function, request parameters, completion routine, and the first component that completed the request with this result.
Recovery considerations
A retry is appropriate only after the owner of this result has changed the state described by “The auto-unlock master key was not available from the operating system volume. Retry the operation using the BitLocker WMI interface.”, or when its contract explicitly marks the status as transient. If the value reports corruption, invalid format, access policy, or a lifecycle mismatch, preserve evidence and correct that cause before repeating the request.
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