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STATUS_IO_REISSUE_AS_CACHED
The operation must be reissued through the cached I/O path
This facility-specific status is a control result used when the current I/O strategy cannot continue and the request should be rebuilt as cached I/O. Cached and noncached operations have different alignment, buffering, coherency, and file-system interactions; simply repeating the identical request leaves the incompatible path unchanged.
The caller that understands the operation must construct the replacement request and ensure the original attempt no longer owns completion. Reissue logic should preserve offsets, lengths, cancellation state, and final result correlation while avoiding a second write or duplicate completion.
What to inspect
- Record whether the original operation was cached, noncached, paging, synchronous, or asynchronous.
- Verify sector and buffer alignment requirements before deciding that cached reissue is appropriate.
- Elect one completion owner and prevent both original and replacement requests from completing the caller.
- Trace cache-manager and file-system callbacks to identify why the first path requested conversion.
References
- Microsoft Open Specifications: NTSTATUS values
- Microsoft WDK: Cache Manager routines
- Microsoft Windows SDK metadata: ntstatus.h
- Microsoft WDK: Different ways of handling IRPs
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