Do you have confidence in your SATA controller?

I certainly don't in my J-Micron SATA controller which is the secondary SATA controller on my ASUS P5K motherboard. The screen shot below shows a CRC check done on a bunch of files. The CRC's were generated on the same drive and then verified back as soon as they were calculated.

Yes, in between taking the CRC's and reading them back, there are now 194 CRC mismatches. Maybe J-Micron consider that acceptable, but I certainly don't, the words "epic" and "fail" spring to mind.