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STATUS_LOST_WRITEBEHIND_DATA_NETWORK_SERVER_ERROR
The remote server rejected or failed delayed write-back
The network connection remained sufficient to return an error, but the server could not persist the buffered data. Possible causes include server-side storage failure, quota or policy changes, share failover, or a remote file-system error.
The server log is authoritative for the underlying failure. A client-only retry can repeat the same problem or create conflicting file versions. Preserve the server response, file identity, and any failover or cluster events.
What to inspect
- Collect server-side file-system and SMB events at the same timestamp.
- Check capacity, quotas, share state, and backing-volume health.
- Validate the resulting file before resuming the application workflow.
References
- Microsoft: troubleshoot delayed-write failures
- Microsoft: FsRtlLogCcFlushError
- Microsoft Open Specifications: NTSTATUS values
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