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ERROR_DEVICE_IN_MAINTENANCE
The device is unavailable while maintenance is active
ERROR_DEVICE_IN_MAINTENANCE is a Win32 system result. Firmware update, media repair, diagnostics, controller service, or an administrative maintenance workflow may temporarily restrict normal I/O. The result should be treated differently from device removal.
What the result means
The device is currently in maintenance mode and cannot perform the requested operation. For ERROR_DEVICE_IN_MAINTENANCE, keep the symbolic name, numeric value, and failing operation together in diagnostics; that combination distinguishes the exact failure path from nearby system results.
What to check
- Identify the maintenance owner and current maintenance phase.
- Review device, storage, firmware, and system logs for progress or failure.
- Verify that the device remains present and that its identity did not change.
- Check whether maintenance has a documented completion notification or timeout.
Recommended handling
Wait for supported maintenance completion, then reopen the device and revalidate state. Do not force normal I/O or reset hardware unless the vendor’s recovery procedure requires it.
Developer notes
Use bounded retries driven by device-state change, not a tight polling loop. Cancel dependent operations safely and make maintenance state visible to users and monitoring. When a Win32 API reports ERROR_DEVICE_IN_MAINTENANCE, capture GetLastError() immediately; subsequent cleanup, formatting, or logging calls can replace the thread-local value.
References
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