[Kristijan1]

1.UltraDMA CRC Error Count:

The count of errors in data transfer via the interface cable as determined by ICRC (Interface Cyclic Redundancy Check).
CRC Errors are usually when data gets corrupted between the HDD controller and SATA controller.

2. http://forum.pcekspert.com/showthread.php?t=210336

3. Google https://www.google.hr/?gws_rd=ssl