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STATUS_RESIDENT_FILE_NOT_SUPPORTED
The operation requires nonresident file data
Small NTFS streams can be stored inside the file record rather than in separately allocated clusters. Operations that depend on physical extents, block alignment, offload, or direct allocation semantics may not apply to that resident representation.
Growing the file may eventually make the stream nonresident, but applications should not write padding merely to force a layout change. Use a supported fallback path that operates through normal reads and writes.
What to inspect
- Identify the exact FSCTL or storage optimization that rejected resident data.
- Do not infer the layout only from file size; query or trace the file-system result.
- Fall back to buffered copy or another representation-independent operation.
References
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