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STATUS_PROACTIVE_SCAN_IN_PROGRESS
A proactive integrity scan already owns the operation
The requested action cannot proceed because a proactive scanner is currently running. ReFS uses a background scrubber to validate infrequently accessed data and trigger repair of latent corruption where integrity information and redundancy allow it.
This is a concurrency state, not a reason to terminate the scan. Check scan progress and storage health, then retry after completion. Stopping the scanner can leave unverified ranges and make later failures harder to correlate.
What to inspect
- Confirm the active Data Integrity Scan task and its start time.
- Review file-system events for progress and repair results.
- Retry the blocked operation after the scanner releases the volume.
References
- Microsoft: ReFS integrity streams
- Microsoft: ReFS overview
- Microsoft Open Specifications: NTSTATUS values
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