Generally the data communication issue / CRC Error count means that the data corrupted during transfer and need to re-read (or re-write) by the hard disk itself. Usually this is not critical for modern drives (eg. for older IDE/PATA drives this was more serious) but may cause performance degradations or even more problems.
If such problem reported, it is required to investigate and fix the original problem, which causes the error counter increase.
Without it, even if you clear the error counter (to acknowledge the problems and be notified about possible new problems), new and new problems will occur and be reported later.
Yes, in most cases the cables, connections are in the background, usually changing the SATA cable fixes the issue, but it is possible that there is something else in the current operating environment which causes constant data communication errors.
You mentioned that you checked the PSU, so I suspect you checked the power cable(s) as well? 4-pin -> SATA power converters and/or the power connector may result in bad connection, non-stable operation and increasing CRC error count.
Please check
www.hdsentinel.com -> Support -> Knowledge Base -> Hard Disk Cases -> Hard Disk Case: Communication errors page (
http://www.hdsentinel.com/hard_disk_cas ... _error.php ) which describes this situation and on the bottom, it gives further tips about other things to check when you experience communication problems / increasing CRC Error Count:
- Other system factors (for example generic overheat, not stable power source, overclocking) can also cause data communication issues. It is recommended to verify and eliminate these issues also if possible.
So I'd try to confirm that all of the above fine (no overclocking, the system and chipset has proper cooling, you may have a UPS just to prevent over-voltage and/or power fluctuations in general).
Also I'd try the hard disk in a completely different computer and/or an external USB adapter/enclosure/docking station (with its own power supply) and copy/move high amount of data. This way it is possible to confirm if the issue is related to the current operating environment - or the hard disk itself, regardless of where/how the hard disk is connected and used.
