WriteFile API succeeds and returns TRUE, but data is not written to the SAN Drive.

Symptom: =======   WriteFile API returns TRUE and succeeds, but data is not written to the SAN Drive. In such a scenario, the lpNumberOfBytesWritten parameter returns Zero, but WriteFile indicates that it has succeeded in writing the data. Questions: ======== Under what conditions WriteFile API might return TRUE, but lpNumberOfBytesWritten  returns Zero? Is this an…