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STATUS_DATA_CHECKSUM_ERROR
The file data failed an integrity checksum
The status means the checksum calculated for file-stream data does not match the stored integrity value. With ReFS integrity streams, file-data checksums are optional, while metadata is always checksummed. On resilient storage, ReFS can attempt repair from an alternate copy; on nonredundant storage it returns an error instead of damaged data.
A checksum failure identifies corrupt data, but not its cause. The source may be a media error, controller or memory fault, stale redundant copy, or unauthorized modification below the file-system layer. Preserve the affected range and correlate it with storage and WHEA events.
What to inspect
- Check whether integrity streams are enabled for the file.
- Inspect whether an alternate copy was available and whether repair succeeded.
- Restore from a verified source if no trustworthy copy remains.
References
- Microsoft: ReFS integrity streams
- Microsoft: ReFS overview
- Microsoft Open Specifications: NTSTATUS values
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