Hard drive randomly disappearing

[Gooms9]

Yea, that was what I thought when I first posted this. I figured I'd just ask and see if anyone had any other solutions before I junked it. I'm having a hard time backing up my files right now because it disconnects after I transfer like, 700 mb of data.

 

[Orbanten]

I have the same problem. My 200GB sata drive removes itself after a while.
I have tried four different cables, latest drivers etc.
In a previous configuration with a different motherboard it was fine except for the dreaded delayed write failures which prompted the change of motherboards.
BTW on the initial virus scan....delayed write failure.

Any ideas would be welcome.