What does HRESULT 0x801F0014 (ERROR_FLT_VOLUME_NOT_FOUND) mean?

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Description:

No Filter Manager volume matches the supplied volume name.

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ERROR_FLT_FILTER_NOT_FOUND	ERROR_FLT_INSTANCE_NOT_FOUND

ERROR_FLT_VOLUME_NOT_FOUND

The named volume is absent from Filter Manager's active list

ERROR_FLT_VOLUME_NOT_FOUND is returned when FltGetVolumeFromName cannot find a matching volume in Filter Manager's global volume list. The API accepts several native and DOS-style volume name formats, but a familiar drive letter does not guarantee that the requested name currently identifies an attached, accessible Filter Manager volume.

The result can be caused by a name mismatch, a volume that is not mounted, a volume that has already been dismounted, or a target outside the expected file-system volume model. It is not interchangeable with an access-denied result, which means a matching volume was found but the caller lacked the required read access.

What to check

Obtain the canonical volume name with the relevant Filter Manager APIs rather than constructing a native name from a drive letter or a cached mount-point mapping.
Check whether the volume was recently mounted, dismounted, or replaced. Do not retain a stale name across storage topology changes.
Query from an appropriate execution context: FltGetVolumeFromName runs at PASSIVE_LEVEL and opens the volume while resolving it.
Release the returned volume object with FltObjectDereference after a successful lookup so that teardown is not held up by an unnecessary reference.

References

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