Read should return exactly the number of bytes requested, except on EOF or error; otherwise, the rest of the data will be substituted with zeroes.

Utility error processing solution has been added. This enables you to read data within UDMA mode for cases where previous version could read the data only in PIO mode.

Reason is usually read or write data error, may be CD quality problems or disk drive read ability not beautiful, or written to the hard disk error.