The asynchronous file request has completed but one or more of the read operations were truncated.
A truncated read occurs when the ReadCommand describing the read operation specifies a Size and Offset that extends past the end of the target file. After the read operation is complete, the AsyncReadManager updates the Size field of the relevant ReadCommand struct to reflect the number of bytes actually read from the file. A truncated read does not typically indicate a problem; all data in the file is read and no extra bytes are copied to your read buffer.